DJI Agras T50 OEM Middle Frame Aluminum Tube (Left) (BC.AG.SS000687)

Middle Frame Aluminum Tube (Left) | Airframe Structural Component | Frame Support Hardware | Structural Aluminum Tube | Field-Ready Replacement Component | DJI Material Number BC.AG.SS000687

DJI Material Number BC.AG.SS000687 — this is the official DJI part number for this exact component. Match it to your parts diagram or the label on the original part to confirm fitment; factory labels may carry a revision suffix, which is the same part.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras reseller supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres proudly supports American agricultural drone operators with genuine DJI Agras OEM replacement parts, professional repair equipment, accessories, and field-ready inventory.

An agricultural drone is, structurally, a set of aluminum bones asked to carry serious weight through serious abuse — and the middle frame tubes are among the biggest bones in the skeleton. The left middle frame tube carries its share of every takeoff, every loaded hover, and every less-than-perfect landing the aircraft makes.

Frame damage rarely stays where it starts. A bent or cracked tube shifts loads onto its neighbors, works fasteners loose, and turns one compromised member into an airframe-wide problem.

That is why Ares Acres keeps hard-to-find structural hardware in stock and shipped fast to the U.S.A., helping operators fix frame damage at the damaged member, minimize downtime, and keep their aircraft spraying when every acre counts.

For professional farmers, aerial applicators, and commercial drone operators, a straight frame is the foundation everything else bolts to.

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✅ DJI Agras T50 / T40 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking

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📦 Package Includes

• 1 × Middle Frame Aluminum Tube (Left)
• Premium structural component
• Direct-fit replacement tube
• Protective packaging

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🔧 Component Overview

The DJI T50 - T40 Original Middle Frame Aluminum Tube (Left) is the left-side middle frame structural member for the DJI Agras T50 and T40 agricultural drones.

The tube provides robust structural support at the heart of the airframe — crafted from high-quality aluminum that delivers superior strength at minimal weight, keeping the aircraft rigid, stable, and true through demanding agricultural duty. A direct-fit member for the left middle frame position, a fresh tube restores factory structural integrity the moment a damaged one comes out.

Commercial agricultural drones operate in demanding environments every day, including:

• Heavy payload operations
• Crop spraying
• Liquid fertilizer application
• Rough field-edge landings
• Orchard operations
• Vineyard spraying
• Precision agriculture missions
• Daily commercial deployments
• Fleet operations
• High-acreage contract work

Throughout these operations, frame tubes are routinely exposed to:

• Full payload structural loads
• Landing impact at every touchdown
• Constant airframe vibration
• Flex cycling under load changes
• Chemical residue and washdown exposure
• Moisture and corrosion exposure
• UV exposure across long seasons
• Fastener stress at mounting points
• Transport strapping and handling
• Long commercial operating hours

Over time, this duty fatigues aluminum, works fasteners, and accumulates damage — and a compromised frame tube means an airframe redistributing loads it was never designed to redistribute.

The Middle Frame Aluminum Tube helps maintain:

• Robust structural support at the airframe core
• Rigidity under full payload
• Stable, true flight geometry
• Load paths as engineered
• Light weight with real strength
• Two-model fleet coverage
• Increased fleet readiness
• Maximum aircraft uptime
• Reliable commercial operation

For operators loading the airframe to its rating daily, structural integrity is non-negotiable.

Before ordering a structural member, prove the airframe is actually out of shape. Set the aircraft on a flat, level surface with the arms in a known, repeatable position and take mirrored measurements: the same reference point on the left compared with the same point on the right, and the diagonals across the frame. A straight airframe gives you matching pairs. A tube that has taken a set gives you one pair that disagrees, and that disagreement is the evidence, not a feeling that something looks wrong.

Sight down the tube the way you would sight down a rifle barrel. Get your eye close to one end, use a plain background such as a wall or the sky, and rotate your view around the tube. A bend that is invisible when you look at the aircraft from three feet away is obvious when the length of the tube is compressed into a single line. Once the tube is off the aircraft, rolling it on a flat bench will show the same thing, because the high spot lifts as it turns.

Cracks in aluminum start where stress concentrates, so clean those areas and look at them specifically rather than scanning the whole tube. The places worth your attention are the edges of every clamp band, the lips of any drilled hole, and any point where the section or the surface treatment changes. Use raking light and magnification. A crack in a loaded structural member ends its service life on the spot: there is no inspection interval that makes a cracked frame tube acceptable.

Work out whether the looseness you can feel is in the tube or in what grips it. Support the airframe, then try to move the tube within its clamp, and separately try to move the whole clamp on the structure it bolts to. Movement between tube and clamp with the fasteners tight means a bore that has gone oval or a tube surface that has fretted down. Movement of the clamp assembly itself means the fault is at that fitting and a new tube changes nothing.

Black or dark grey powder, or a greasy dark paste, at a clamp interface is fretting debris, and it is the physical evidence that a joint which should be motionless has been moving. Fretting does not reverse when you retighten, because the surfaces that used to grip each other have polished each other smooth. Alongside it, look for a bright shiny band on the tube where a clamp has been sliding. Both mean the joint has already lost the preload it needed.

White powdery bloom, chalky deposits, or a rough pitted patch on the aluminum is corrosion, and where it matters most is under clamps and around fastener holes, which is exactly where you cannot see it without taking the joint apart. Surface staining is cosmetic; visible pitting is not. Each pit is a stress raiser, and pits in a member that carries payload load every flight are where the next fatigue crack will start, so pitting under a clamp band is a replacement finding.

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⚙️ Functional Purpose

The Middle Frame Aluminum Tube (Left) is designed to provide structural support at the left middle frame position of the DJI Agras T50 and T40.

The component helps:

• Carry structural loads at the airframe core
• Keep the airframe rigid under payload
• Maintain true flight geometry
• Distribute loads as the frame was engineered
• Resist fatigue through demanding duty
• Add strength at minimal weight
• Replace bent, cracked, or fatigued tubes
• Restore factory structural integrity
• Install directly at the left middle frame position
• Maintain correct fitment across both models
• Support preventative maintenance
• Increase fleet readiness
• Keep structural hardware field-ready

Every pound the aircraft lifts loads this tube — and the airframe is only as sound as its members.

A sound frame tube keeps the structure true through season after season of loaded duty.

A worn or damaged frame tube may contribute to:

• Airframe flex under payload
• Loads shifting onto neighboring members
• Fasteners working loose
• Geometry drifting out of true
• Vibration increasing through the frame
• Accelerated wear on connected components
• Interrupted spraying missions
• Unexpected downtime
• Reduced fleet reliability

Replacing a compromised tube restores the load paths the airframe was engineered around.

Build the support before you remove the structure. Batteries out, tank drained, and the aircraft cradled at several points so that when the tube comes free the remaining members are not asked to carry the whole airframe through a load path that no longer exists. Blocks, a padded stand, or a second pair of hands all work; what does not work is trusting the aircraft to keep its shape while one of its main members is out. Never let the weight hang on the opposite tube.

Record the geometry before you break it. Photograph the tube in place from several angles, note where every clamp sits along its length, and mark the tube itself with tape at each clamp edge so you can put the new one back at the same stations. Note the rotational orientation too, because a drilled feature, a flat, a cable route, or a witness mark can all mean the tube is meant to go in one particular way round.

Free everything that attaches to the tube before you apply any force to the tube. Cable clamps, harness ties, hose retainers, brackets, and anything bolted through it all come off first. Pulling a tube out through a clamp that is still gripping a harness is how a wiring loom gets stretched or a connector gets torn, and those are faults you will spend a day finding later because nothing looks wrong from outside.

Do not hammer a stuck tube and do not heat it. Aluminum in a corroded joint can grip hard, and the right answers are penetrant, time, and gentle rotation to break the bond, with soft jaws or a wood block protecting the surface if you need grip. A hammer puts a dent in a member you may end up reusing, and heat changes the properties of the material in ways you cannot see or verify afterward. Patience here costs less than a second part.

Clean and inspect the clamp bores before the new tube goes anywhere near them. Old fretting debris, dried spray residue, and corrosion products all act as abrasive once the joint is clamped, and any of them will keep the new tube from seating on a true surface. Check each bore is round and undamaged. If a bore is scored or ovalled, fitting a fresh tube into it simply transfers the wear to the new part on an accelerated schedule.

Slide the new tube in, do not drive it. It should pass through its clamps with hand pressure once they are backed off, and if it will not, something is misaligned or a bore needs cleaning rather than the tube needing persuasion. Protect the surface as it goes, because a scratch through the finish in a clamp band area becomes a corrosion site and a fretting site later. Line the tube up with the tape marks and the orientation you recorded before anything gets tightened.

Tighten in stages and check the geometry before the final pass. Snug each clamp lightly, take your mirrored measurements again and confirm the pairs now agree, then work up to the DJI torque figure in a crossing pattern rather than finishing one clamp before starting the next. Afterward, fold and unfold the arms and confirm they lock as cleanly as they did before, then re-check clamp torque after the first flight, because a fresh joint settles.

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⚠️ Common Replacement Indicators

Replacement may be recommended when operators observe:

• Bent or deformed tube profiles
• Cracks at stress points or fastener holes
• Dents from impact or handling
• Corrosion on the aluminum surface
• Elongated or worn fastener holes
• Fasteners that repeatedly loosen
• Visible airframe flex under load
• Geometry out of true after incidents
• Post-hard-landing inspections
• High-hour structural hardware
• Maintenance inspection findings
• Airframe rebuild projects
• Fleet refurbishment projects
• Preventative replacement programs

Common causes of frame tube damage include landing impact accumulating touchdown after touchdown, payload cycling fatiguing the aluminum, vibration working fastener holes oversize, corrosion from chemical exposure weakening the surface, and hard-landing overloads bending members outright — aluminum fatigue is progressive and invisible until it cracks, so experienced crews inspect frame members at every major service and replace at the first crack, bend, or persistent fastener loosening.

For commercial operators, a fresh frame tube is almost always cheaper than the airframe-wide damage a failed one causes.

A clamp that will not stay tight at one station, while identical clamps elsewhere hold fine, is telling you about that joint. The usual causes are a bore that has gone oval, a tube surface that has fretted down under the band, or a tube that is no longer straight and is therefore only touching part of the clamp. Retightening restores the feeling of a tight joint for a few flights and then loses it again, which is the pattern to watch for rather than the single loose fastener.

New vibration that appeared immediately after a hard landing, with propellers and motors all checking out clean, is a reason to measure the frame. When a member takes a set, the motor mounts it supports no longer sit in the plane they were built to sit in, and the aircraft ends up fighting a geometry error it cannot trim away. Rule out the cheap causes first, then measure, because frame geometry is the expensive answer and it deserves evidence before it is accepted.

A dent, flat spot, or crease in a tube is worse than it looks, and operators routinely underestimate it. A tube gets its stiffness from being round; the moment a section is flattened, the load that used to travel evenly around the wall concentrates at the edges of the flat, and the member can buckle there at a fraction of the load it was designed to carry. A dented structural tube is a replacement item even when it is otherwise perfectly straight.

A creak, tick, or knock heard when the aircraft is lifted, set down, or loaded is a joint moving that should not be moving. It is easy to dismiss because it does not happen in flight where you could hear it anyway, but the noise is the sound of a clamp band slipping on a tube or a fitting shifting on a fastener. Find it on the ground with a helper loading the airframe while you listen along the frame, and treat it as a structural finding.

Corrosion blooming out from beneath a clamp band, or staining that runs down the tube from a clamp edge, means moisture and chemistry have been sitting in the one place that never dries. That joint has to come apart to be assessed, because the visible bloom is the small end of what is under the band. Chemical residue trapped under a clamp keeps working long after the outside of the aircraft looks clean and dry.

Fastener holes in or around the tube that have gone oval, or fasteners that show a bright fretted ring where they bear, mean the joint has been carrying load by friction that ran out some time ago. Once a hole is elongated, no torque value will restore the original fit, and the member is being positioned by whatever it happens to rest against. This is a replacement indicator on a structural part, not something to solve with a larger fastener.

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📐 Specifications

DJI Material Number (SKU): BC.AG.SS000687

Component Type: Middle frame aluminum tube / airframe structural member

Position: Left middle frame

Compatibility:

• DJI Agras T50
• DJI Agras T40

Package Quantity: 1 Tube

Installation Area: Left middle frame position

Function: Provides core structural support and maintains airframe rigidity

Material: High-quality aluminum

Design: Lightweight structural tube, direct-fit

Construction: Weather-resistant build for agricultural duty

Mounting Type: Direct-fit replacement member

Application: Agricultural drone airframe maintenance

Length, Outside Diameter, and Wall Thickness: Not published in this listing. Compare the replacement directly against the tube you removed, laid alongside it on a flat bench, checking overall length, diameter, wall thickness at the ends, and the position of any drilled or machined feature. Structural tubes on an Agras airframe differ between positions in ways that a photograph will not show, so the physical comparison is the check that matters.

Alloy, Temper, and Surface Treatment: Not published beyond being supplied as high-quality aluminum. Because the alloy and temper are unspecified, do not attempt to weld, heat, straighten, or anodize this member, and do not substitute tube stock from a metal supplier on the basis of matching diameter. The heat treatment condition of a structural aluminum part is invisible and is exactly what those processes change.

Clamp Fastener Torque: Not published here, and mounting hardware is not supplied with the tube. Use the DJI service figure for the frame clamps on your airframe with a calibrated torque wrench, and tighten progressively in a crossing pattern so the clamp closes evenly around the tube. A frame joint held by friction depends entirely on that clamp load being correct and even, which is not something feel can deliver reliably.

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🧰 Fitment Verification Before You Order

This listing is DJI material number BC.AG.SS000687. That number, not the description, is what makes a part match. Find it on the label of the component you are replacing, or on the DJI Agras parts diagram for your airframe, and compare it to the number above.

Revision suffixes are still the same part. DJI labels sometimes carry a trailing revision such as .01, .02, or .F. Those denote a production revision, not a different component. Match the base number and disregard the suffix.

Visually similar is not the same. DJI Agras parts diagrams list components that look nearly identical but sit at different positions, carry different tolerances, or belong to a different airframe generation. Ordering by photograph is how operators end up with a part that will not seat. Order by number.

Verified fitment for this listing: DJI Agras T50. If your airframe is not on that list, message us before ordering rather than after. We would rather answer a question than process a return, and so would you.

Not sure? Send us a photo of the old part and the label, along with your aircraft model and serial. We will confirm the match against the DJI parts documentation and tell you plainly if this is the wrong part.

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🛠️ Installation & Handling Notes

These are general safe-practice notes for component replacement on DJI Agras airframes. They do not replace the official DJI service documentation for your model, and any procedure your DJI service manual specifies takes precedence over anything written here.

Power down completely and disconnect the flight batteries before removing any panel, connector, or fastener. Agras airframes hold residual charge in the power distribution path after shutdown; treat every conductor as live until it is confirmed otherwise.

Photograph the assembly before you disturb it. Cable routing, connector orientation, and fastener lengths on Agras airframes are not interchangeable, and the Middle Frame Aluminum Tube (Left) is easier to fit correctly when you can see how the original sat.

Torque to DJI specification. Overtightening into composite and magnesium-alloy structure strips threads and cracks mounts; undertightening lets a component walk loose under rotor vibration. Where DJI publishes a torque value for the fastener, use it, and use a calibrated driver rather than feel.

Check the mating surfaces and seals while you are in there. A component is only as good as what it seats against. Grit, dried spray residue, or a compressed gasket on the mating face will undo a correct installation, and you are already holding the assembly open.

Test before you spray. Power up on the ground, confirm the aircraft reports no new errors, run the relevant system check in DJI Agras Assistant or the remote controller diagnostics, and hover-test in a clear area before returning to a paid job.

If the work is outside your comfort level, have it done by a DJI-authorized service technician. The part cost is small next to the airframe.

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🚜 Necessary For

This component is ideal for:

• DJI Agras T50 operators
• DJI Agras T40 operators
• Farmers operating spray drones
• Commercial spraying contractors
• Agricultural aviation companies
• Fleet maintenance managers
• Agricultural drone technicians
• DJI Agras service providers
• Drone repair facilities
• Commercial drone fleets
• Precision agriculture businesses
• Airframe rebuild projects
• Post-incident repairs
• Preventative maintenance programs
• Daily commercial operations
• Emergency repair inventory
• Professional agricultural drone operators

Especially valuable during:

• Spring spraying season
• Summer application windows
• Airframe service work
• Post-hard-landing repairs
• Multi-aircraft fleet maintenance
• Seasonal rebuilds
• Emergency repairs
• High-hour commercial operations

When the airframe carries the season's weight, keeping its members sound keeps operations moving.

This listing is the left-side member, and left and right are not interchangeable even where they look like the same length of tube. Mirrored parts put their machined features, drilled holes, and flats on opposite sides, so a right-hand tube offered up to a left-hand position will present everything in the wrong place. Offer the new part up against the old one before you commit, and tape a marked label on any tube that comes off an airframe so it never gets guessed at later.

A middle frame tube is not an arm tube. Arm tubes run outboard, carry a motor and propeller at their far end, and on most airframes fold for transport, which means they see a different set of loads and have their own fittings and part numbers. Middle frame members sit inside the structure and carry payload and landing loads across the body of the aircraft. The two are ordered in place of each other regularly, so identify by position on the aircraft.

It is also not landing gear tubing. Landing gear legs are aluminum, similar in diameter to the eye, and take the same kind of abuse, but they attach at different points and are shaped and drilled for that job. If the tube you removed reaches the ground or carries a foot, it is not this part. Follow the member from end to end on the aircraft before ordering rather than working from where the damage happened to be.

Do not substitute tube stock from a metal supplier because a caliper says the diameter matches. A structural member is defined by its alloy and temper, its wall thickness, its end preparation, and any machined or drilled features, and none of those are things you can confirm from the outside of a piece of raw tube. A cut length of shop aluminum will fit, will clamp, and will look right, and it will have no verified relationship to the loads the airframe puts through that station.

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💡 Why This Part Matters

Airframes fail as systems, not as parts. One fatigued tube flexes a little more than designed; that flex loads its neighbors past their share; their fasteners work loose; and an aircraft that had one bad member develops five. Structural problems compound — which is why they're cheapest to fix at member one.

Aluminum makes the case for vigilance: fatigue accumulates invisibly and announces itself as a crack. The crews with the straightest airframes treat frame inspection as routine — every major service, every hard landing — and swap individual members the moment they show damage, keeping the repair at tube-price instead of airframe-price.

The Middle Frame Aluminum Tube helps maintain:

• An airframe that carries loads as designed
• Structural problems fixed at one member
• Geometry that stays true under payload
• Two-model fleet coverage
• Professional fleet standards
• Increased aircraft uptime
• Reliable commercial performance
• Long-term operational confidence

Flying a compromised frame tube, operators risk:

• Damage compounding across the airframe
• Loads migrating onto healthy members
• A structural failure under full payload
• Repairs escalating from tube to airframe
• Interrupted missions
• Unexpected downtime
• Lost spraying opportunities
• Reduced return on investment

For practical, hardworking operators, the value is simple:

Protect the frame. Protect the airframe. Protect the mission. Protect the season.

Professional DJI Agras operators understand that everything on the aircraft bolts to the frame. Keeping every member sound means an airframe that carries the whole season true — and that difference is what separates a good season from a frustrating one.

The landing that bent this tube loaded the whole structure, so plan the inspection around the event rather than around the part. Check the opposite middle frame member with the same measurements and the same sighting test. Check every clamp and its fasteners for fretting and elongated holes. Check the arm roots and their fittings, the landing gear on the side that took the hit, and the shell panels underneath, which usually crack before anything structural bends and can tell you how hard the impact really was.

With the tube out you can see joints that are normally buried, and that access is worth ten minutes. Look at each clamp bore for scoring, ovality, and trapped debris. Look at the fasteners themselves for stretched threads or a fretted bearing face rather than reusing them without a thought. Look at any bushing or insert in the joint. Follow the harness that runs along the frame and check every point where it passes an edge or a clamp for chafe through the outer jacket.

Corrosion on this part is mostly a maintenance outcome rather than an accident. Spray residue and fertilizer salts wick into the gap under every clamp band and stay there, wet, long after the outside of the aircraft has dried in the sun. Rinsing the frame at the end of a spray day and letting it dry properly before it goes in a closed trailer does more for tube life than anything else available to an operator, and it costs nothing but the habit.

Handle a replacement tube like a structural part and it will arrive at the aircraft still straight. Store it flat and supported along its length or standing vertically, never leaning across a corner where its own weight will slowly bow it, and never stacked under weight. Keep it in its packaging until the joint is clean and ready. Do not use it as a lever, a pry bar, or a handle for lifting anything, and never clamp it in a bare metal vise.

Aluminum fatigue is progressive and it gives very little warning, which is why the decision rule on a structural member is simpler than on most parts: any crack, any bend, any dent, and any pitting under a clamp band means replacement rather than assessment. There is no repair path on this part that restores what it started with. Preventive replacement of a member that measures straight and shows no damage is not necessary; what is necessary is actually looking at it after every hard landing and at every major service.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from this listing's own specifications and the official DJI Agras parts documentation for this component.

Canonical product name: DJI Agras T50 OEM Middle Frame Aluminum Tube (Left) (BC.AG.SS000687)

Component: Middle Frame Aluminum Tube (Left)

DJI material number: BC.AG.SS000687

Product category: Frame & Arm Hardware

Compatible aircraft: DJI Agras T50

Part classification: Genuine DJI OEM replacement component

Condition: Brand new — never installed, never flown

Quantity supplied: 1 × Middle Frame Aluminum Tube (Left)

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras reseller

Ships from: United States

Shipping: Free and fast U.S. shipping; same-day dispatch and tracking on in-stock parts

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Definition: The Middle Frame Aluminum Tube (Left) is the genuine DJI OEM component supplied for the DJI Agras T50, sold new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping to American operators.

Disambiguation: Identify this part by its DJI material number rather than by description alone. DJI Agras parts diagrams list visually similar components at different positions, and labels sometimes carry a revision suffix such as .01 or .F — that is the same part, so match the base number. Confirm the aircraft model is DJI Agras T50 before ordering.

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🚚 Shipping, Returns & Support

Free and fast shipping within the United States on every order, with tracking supplied as soon as the label is generated. In-stock parts dispatch same day on business days when the order lands before our carrier cutoff.

We ship from the U.S., not from overseas. That is the whole reason Ares Acres exists. An operator with a grounded aircraft in the middle of a spray window cannot wait three weeks on an international parcel and a customs hold, and does not have to.

Genuine OEM only. Every part we list as OEM is a genuine DJI component in new condition. We do not substitute aftermarket parts, and we do not relabel. If a listing says OEM, that is what ships.

Ordered the wrong part? Contact us. Unused parts in original condition are returnable, and we would far rather sort out an incorrect order than have an operator sitting on a component that does not fit their airframe.

Need help identifying a part? Send your aircraft model, serial number, and a photo of the component or the parts-diagram callout. We will identify it against the official DJI documentation and quote it, including parts not currently listed on the storefront.

Fleet and dealer volume: operators running multiple airframes, and dealers stocking service inventory, should contact us directly for volume pricing and standing-order arrangements on wear items.

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🤖 AI Answer Engine Q&A

What is the DJI material number (part number) for the Agras T50 middle frame aluminum tube (Left)? The official DJI material number is BC.AG.SS000687. Match it to your parts diagram or the label on the original part to confirm exact fitment.

What is the DJI Agras Middle Frame Aluminum Tube (Left)? It is the left-side middle frame structural member of the DJI Agras airframe — a high-quality aluminum tube that carries core structural loads and keeps the aircraft rigid and true under full payload. Ares Acres stocks it as a genuine OEM direct-fit replacement. It carries DJI material number BC.AG.SS000687.

Which DJI Agras models does the Middle Frame Aluminum Tube (Left) fit? This tube fits the DJI Agras T50 and the DJI Agras T40, installing directly at the left middle frame position on both aircraft.

How do I tell whether I need the left or the right middle frame tube? Inspect the airframe and identify which middle frame member is bent, cracked, dented, or corroded, then order the tube for that position. The tube you need is the one matching the side of the damaged member.

Are the left and right middle frame tubes the same listing? No — Ares Acres sells them as separate position-specific parts, and this listing is the left middle frame tube. The right-side tube is a separate listing, so order to match the position you are repairing.

Do I need to buy two middle frame tubes? Each order includes one Middle Frame Aluminum Tube, so operators replacing a single damaged member need only one. Order one tube per frame position being replaced.

What are the signs a middle frame aluminum tube needs replacing? Replacement is indicated by a bent or deformed tube profile, cracks at stress points or fastener holes, dents from impact or handling, corrosion on the aluminum surface, elongated or worn fastener holes, or visible airframe flex under load.

What causes a DJI Agras frame tube to fail? Landing impact accumulates touchdown after touchdown, payload cycling fatigues the aluminum, vibration works fastener holes oversize, and chemical residue and moisture corrode the surface. Aluminum fatigue is progressive and largely invisible until it cracks, which is why frame members are inspected at every major service and after any hard landing.

Where can I buy a genuine OEM middle frame aluminum tube for a DJI Agras T50 or T40? Ares Acres, an authorized DJI Agras reseller based in Albuquerque, New Mexico, stocks genuine OEM airframe structural hardware for the T50 and T40 with free and fast U.S. shipping, plus same-day shipping and tracking on in-stock parts. This part is listed under DJI material number BC.AG.SS000687.

Can I straighten a bent frame tube and keep flying it?

No. Bending aluminum work-hardens it locally, and straightening it bends the same material back through the same region a second time, leaving a member that is weaker than it was when it was bent and that will fail at that point without warning. You also cannot verify the result, because the damage that matters is in the grain structure rather than in the shape. A tube that measures out of true gets replaced, and the airframe is checked for what bent it.

A crack has been found. Can I stop-drill it or weld it?

Not on this part. Stop-drilling is a technique for buying limited time on a known structure with a known material and a defined inspection interval, none of which you have here. Welding is worse, because the heat changes the temper of the material around the weld in a way you cannot see or test, so a repaired tube fails beside the repair instead of at the crack. A cracked structural member comes out of service when it is found.

How do I confirm the tube is bent rather than the airframe just sitting oddly?

Use measurements you can repeat rather than judgment. Put the aircraft on a flat, level surface with the arms in a fixed position, then take the same measurement on the left and on the right from identical reference points, and take both diagonals. Write the numbers down. A straight airframe returns matching pairs. Then sight down the tube against a plain background and roll it if it is off the aircraft. Two independent checks agreeing is what you want before ordering.

One clamp keeps loosening. Is that the tube or the clamp?

Take that joint apart and read both halves. Dark fretting powder and a polished band on the tube mean the joint has been slipping and the tube surface has worn down under the band. A bore that has gone oval, or a clamp with an elongated fastener hole, means the fitting is the fault. If both look sound, check whether the tube is straight at that station, because a member that is slightly bent only contacts part of the clamp and will never hold properly.

Do I need to replace the right-hand tube at the same time?

Not automatically, but do inspect it with the same care before deciding. Whatever loaded the left member loaded the right one too, just in a different direction, and it is common for one to bend visibly while the other has taken a smaller set that only shows in measurement. Measure it, sight down it, and take a hard look at its clamp joints for fretting. Replace it if it fails any of those checks, not because its partner failed.

Do I need special tools or a jig to change a middle frame tube?

Mostly you need support and discipline rather than special tooling. What matters is cradling the airframe so it holds its shape while a member is out, marking clamp positions and orientation before removal, freeing everything attached to the tube before applying force, and having a calibrated torque wrench for the clamps. The measurement check afterward is what verifies the job, and that needs a flat surface, a tape, and the patience to write numbers down.

There is white powder under a clamp band. How serious is that?

Serious enough to take the joint apart the same day. What you can see at the edge of a band is the smallest part of what is under it, and corrosion under a clamp sits in the exact spot where the tube is being squeezed and where load is transferred by friction. Clean it, then look for pitting. Surface staining that polishes away is manageable; visible pits are stress raisers on a member that carries payload every flight, and they mean replacement.

Is this a genuine DJI OEM Middle Frame Aluminum Tube (Left)?

Yes. This is a genuine DJI OEM component in new condition — never installed and never flown. Ares Acres LLC is a U.S.-based authorized DJI Agras reseller. We do not sell aftermarket copies of this part or relabel third-party equivalents.

Will this fit my aircraft?

This part is supplied for the DJI Agras T50. Confirm by matching DJI material number BC.AG.SS000687 against the label on your original part or your model's DJI Agras parts diagram. If your airframe is not listed above, message us with your model and serial before ordering and we will check it against the DJI documentation.

How fast does it ship, and where does it ship from?

It ships free and fast from within the United States, with tracking. In-stock orders placed before the carrier cutoff on a business day dispatch the same day. Nothing routes through an overseas warehouse or customs.

Can I install the Middle Frame Aluminum Tube (Left) myself?

Many operators do. Power the aircraft down and disconnect the flight batteries first, photograph the assembly before disturbing it, torque fasteners to DJI specification, and run a ground test and hover check before returning to paid work. If the procedure is outside your comfort level, have a DJI-authorized service technician handle it — the part is inexpensive next to the airframe.

What if I order the wrong part?

Contact us. Unused parts in original condition are returnable. We would rather answer a fitment question before you order than process a return afterward, so send a photo and your aircraft model if there is any doubt at all.

Do you stock other parts for this aircraft?

Yes. Ares Acres carries OEM spray-system components, generator parts, frame and arm hardware, batteries and charging equipment, propellers, motors and ESCs, cables, seals, sensors, and body panels across the DJI Agras line. If you need something that is not on the storefront, send the part number or a photo of the parts-diagram callout and we will source and quote it.

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