DJI Agras T50 OEM Lower Propeller Clamp (YC.JG.QX002177)

Lower Propeller Clamp | Lower Prop Retention Clamp | Propeller Mounting Clamp | Blade Attachment Hardware | Field-Ready Replacement Component | DJI Material Number YC.JG.QX002177

DJI Material Number YC.JG.QX002177 — 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.

Every lower propeller on the aircraft is held to its mount by clamping hardware — and clamping force is one of those things nobody sees until it fades. The clamp does its job silently, flight after flight, gripping the blade assembly against thousands of RPM and full payload lift.

A tired clamp is a loose handshake between blade and airframe. Grip that has relaxed even slightly lets micro-movement into the lower propeller mount, and micro-movement at operating RPM becomes vibration, accelerated wear, and a blade connection no operator should trust with a loaded aircraft over a customer's field.

That is why Ares Acres keeps hard-to-find propulsion mounting hardware in stock and shipped fast to the U.S.A., helping operators keep every lower blade clamped tight, minimize downtime, and keep their aircraft spraying when every acre counts.

For professional farmers, aerial applicators, and commercial drone operators, solid clamping hardware is the quiet foundation of stable flight.

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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 × Lower Propeller Clamp
• Premium propeller retention hardware
• Direct-fit replacement component
• Protective packaging

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🔧 Component Overview

The DJI Agras T50 - T40 Lower Propeller Clamp is the lower propeller retention hardware for the DJI Agras T50 and T40 agricultural drones.

The clamp secures the lower propeller assembly to the propulsion system — maintaining grip through high-RPM loading, payload lift, and the constant vibration of commercial flight. Crafted from premium, high-durability materials with a plug-and-play fit, it restores factory clamping force the moment a worn clamp comes off.

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

• Crop spraying
• Liquid fertilizer application
• Heavy payload operations
• Long-duration flight missions
• Orchard operations
• Vineyard spraying
• Precision agriculture missions
• Daily commercial deployments
• Fleet operations
• High-acreage contract work

Throughout these operations, lower propeller clamps are routinely exposed to:

• High-RPM torque loading every flight
• Full-payload lift forces
• Continuous propulsion vibration
• Propeller service and swap cycles
• Ground dust and field grit kicked up at the lower rotors
• Chemical mist and spray residue
• Heat cycling from motor operation
• Torque stress from installation cycles
• Transport handling
• Long commercial operating hours

Over time, this duty relaxes clamping force, wears mating surfaces, and fatigues the material — and a tired clamp means blade retention the propulsion system can't count on.

The Lower Propeller Clamp helps maintain:

• Secure, stable lower propeller retention
• True blade rotation at every RPM
• Reduced propulsion vibration
• Full torque transfer to the blades
• Enhanced flight stability
• Two-model fleet coverage
• Increased fleet readiness
• Maximum aircraft uptime
• Reliable commercial operation

For operators hanging loaded aircraft on their blade mounts, clamp integrity is non-negotiable.

The first thing to settle is whether the movement you can feel is in the retention hardware or in the motor underneath it. With the aircraft powered down and the flight battery disconnected, take hold of the blade close to its root and try to move it three ways: in the plane of rotation, along the length of the blade, and up and down out of the plane. Watch what moves with your hand. Play that appears between the blade assembly and a motor that stays perfectly still is a retention problem. Play where the motor rotor tips or rocks along with the blade is a bearing problem, and a new clamp will not touch it.

The swap test settles arguments that inspection cannot. Move the suspect blade and clamp to a different arm, and move a known-good set into the suspect position. If the looseness and the vibration travel with the hardware, you have your part. If they stay behind on the same arm no matter what you hang on it, the fault is the motor, the mount, or the arm, and buying retention hardware will not change anything except your parts bill.

Fretting debris is the most reliable physical evidence this part leaves behind. Look at the joint line and the mating faces for a fine dark grey or reddish-brown powder, sometimes packed into the corners, sometimes just a smudge that reappears after you wipe it off. That powder is oxidized metal generated by two surfaces moving against each other under load, which is exactly what a clamp is supposed to prevent. Once it forms it also acts as an abrasive, so the wear rate climbs from that point on.

Read the mating surfaces for polish. A clamp interface that is doing its job stays matte and evenly marked. A clamp that has been micro-moving develops bright burnished patches, usually not symmetrically, and often on one side more than the other. Bright patches on one side with dull surface on the other mean the grip has been uneven, which points at distortion, contamination on one face, or a fastener stack that was never pulled up evenly.

Separate wear from over-torque damage, because the two call for different corrective action. Wear shows up as polish, fretting, and a gradual loss of grip. Over-torque shows up as visible distortion, a clamp that no longer closes evenly, an imprint pressed into the material under a fastener head, thread damage, or fine cracks radiating from a fastener hole. If what you find is over-torque, the technique that caused it needs fixing at the same time as the part, or the new clamp will go the same way.

Rule out the blade before you condemn the clamp, because a damaged blade produces vibration that feels much the same from the ground. Look at the leading edges for erosion and chipping, at the surface for chemical etching or delamination, at the root for cracks and elongated holes, and at the set as a whole for a blade that was replaced on its own and does not match its partners. The clean way to separate the two is to fit a known-good blade into the same clamp and see whether the vibration follows the blade.

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⚙️ Functional Purpose

The Lower Propeller Clamp is designed to hold the lower propeller assembly securely in place on the DJI Agras T50 and T40.

The component helps:

• Secure the lower propeller assembly to the propulsion system
• Maintain clamping force at high RPM
• Hold blade attachment stable under payload
• Transfer motor torque cleanly to the blades
• Maintain true, stable blade rotation
• Reduce mount-sourced vibration
• Support flight stability in demanding conditions
• Replace worn, loose, or damaged clamps
• Restore factory retention integrity
• Install plug-and-play in minutes
• Maintain correct fitment across both models
• Support preventative maintenance
• Keep retention hardware field-ready

Every pound of lift the lower rotors produce passes through their clamps — and the clamps are only as good as their grip.

A sound clamp keeps every lower blade locked tight through season after season of loaded flight.

A worn or damaged propeller clamp may contribute to:

• Play or movement at the lower blade mount
• Rising propulsion vibration
• Uneven propeller and mount wear
• Reduced flight stability
• Torque transfer losses
• Blade attachment concerns in flight
• Interrupted spraying missions
• Unexpected downtime
• Reduced fleet reliability

Replacing worn clamps restores the retention integrity the propulsion system was engineered around.

Treat the rotor as live until it is genuinely dead. Power the aircraft down and disconnect the flight battery before a hand goes anywhere near a blade, and physically restrain the blade you are working on so it cannot swing while your fingers are in the joint. Mark the arm and the rotor position with tape before anything comes off, because retention hardware, blades, and fasteners all belong with the position they came from and identical-looking parts get mixed up fast on a workbench.

Support the assembly properly and never use the blade as a handle. When you need to counter-hold while releasing fasteners, hold the arm or the motor mount, not the motor bell, because loading the bell to break a fastener free pushes straight through the bearing you are trying to protect. Do not lever a blade against the arm to gain purchase, and do not use an impact driver on a small retention joint where feel and control matter more than speed.

Keep the joint clean and keep the hardware in order. Lay the fasteners out in the sequence they came off, and clean every surface with a lint-free cloth as you go. The single biggest enemy of a clamped joint is grit trapped between the faces, which holds the surfaces apart, relaxes as it crushes, and leaves a joint that was tight when you built it and loose two hours later. Do not use abrasive paper, a wire wheel, or a scraper on the mating faces.

Check the new part against the old one before it goes on. Confirm the material number YC.JG.QX002177 against the label on the removed clamp or against your parts diagram, allowing for a revision suffix, then lay the two side by side and confirm the profile, the fastener positions, and any alignment feature match. Note which face was up. A clamp fitted the wrong way round or on the wrong rotor position is a problem that only announces itself once the aircraft is loaded and in the air.

This is where the honest answer is that no torque figure is published for this component in this listing, and guessing at one is worse than having none. A retention clamp is a friction joint: too loose and it frets its way to failure, too tight and it distorts and cracks. Use the value and the tightening sequence from the DJI service documentation for your aircraft, apply it with a calibrated driver rather than by feel, and pull the fasteners up progressively and evenly rather than taking one straight to full torque.

Verify before you fly and verify again after. Repeat the hand-movement check with the new clamp in place and confirm there is nothing to feel, fold and unfold the blade through its full range to confirm nothing binds or catches, then spin the rotor slowly by hand and listen. Do an unloaded ground run and a low hover before any tank goes on. Then re-check the fasteners after the first flight and again at the end of the first loaded day, because a fresh clamped joint settles and that is when it tells you the truth.

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⚠️ Common Replacement Indicators

Replacement may be recommended when operators observe:

• Play or looseness at the lower propeller mount
• Relaxed or fading clamping force
• Worn or polished mating surfaces
• Rising vibration traced to the lower rotors
• Cracked or stressed clamp material
• Deformed or fatigued clamp body
• Uneven propeller seating
• Damage from over-torqued installs
• High-hour retention hardware
• Maintenance inspection findings
• Propulsion rebuild projects
• Fleet refurbishment projects
• Preventative pre-season replacement
• Long-term commercial wear

Common causes of clamp wear include torque cycling from thousands of flights, mating-surface wear from repeated propeller swaps, vibration fretting the grip surfaces, over-tightening stress during hurried installs, and ground grit grinding into the clamp interface — the lower rotors live closest to the dust, and retention hardware wears invisibly until vibration announces it. Experienced crews check clamp grip at every propeller service and replace at the first detectable movement.

For commercial operators, preventative clamp replacement is almost always cheaper than the motor and airframe wear a loose mount radiates.

A tick or a faint click from a rotor as it spools down, or as the blade is folded and unfolded by hand, is the sound of two parts moving against each other that should be locked together. It usually arrives before there is any play you can feel and long before there is vibration anyone complains about. On a machine that is otherwise smooth, one arm that has started ticking is worth pulling apart on the spot.

Dark powder or a rust-colored smudge at the clamp joint that keeps coming back after you clean it is fretting, and fretting only happens where there is movement. There is no version of this finding that is normal wear. Treat it as confirmation that the joint has lost grip, and expect the surfaces underneath the powder to be polished when you get them apart.

Vibration that only appears with a full tank, and disappears when the aircraft flies light, is a strong indicator of a retention joint rather than a blade or a bearing. A clamped joint that is marginal will hold under low load and start slipping once real lift is passing through it. Operators often dismiss this because the aircraft feels perfect on the test hover, which is exactly the condition least likely to reveal the fault.

A blade that no longer sits at quite the same height or angle as its counterparts, or that hangs differently when folded, is telling you the clamp is not gripping squarely. Uneven grip comes from distortion, from contamination on one face, or from a fastener stack pulled up unevenly. Even if there is no measurable play yet, an assembly that no longer sits like the others on the same airframe deserves to come apart.

Fasteners found loose at the same rotor position more than once are a symptom, not a maintenance task. A sound clamped joint holds its fasteners because the clamped stack stays under load. When the clamp has worn, distorted, or gone soft at the faces, the stack relaxes and the fasteners back off no matter how carefully they were torqued. Re-torquing that position for a third time is treating the alarm instead of the fire.

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📐 Specifications

DJI Material Number (SKU): YC.JG.QX002177

Component Type: Lower propeller clamp / propeller retention hardware

Compatibility:

• DJI Agras T50
• DJI Agras T40

Package Quantity: 1 Clamp

Installation Area: Lower propeller mounting assembly

Function: Secures the lower propeller assembly to the propulsion system

Design: Precision retention clamp, plug-and-play fit

Construction: Premium, high-durability materials

Mounting Type: Direct-fit replacement component

Application: Agricultural drone propulsion maintenance

Torque Specification: Not published in this listing. Do not guess and do not tighten by feel. Use the torque value and the tightening sequence given in the DJI service documentation for your aircraft, applied with a calibrated driver.

Published Dimensions: DJI does not publish dimensions or a material grade for this clamp. Compare the new part directly against the removed one, and confirm the material number YC.JG.QX002177 on the original label, before it goes on the aircraft.

Quantity Consideration: Supplied as one clamp. An aircraft carries retention hardware at every lower rotor position, so decide up front whether you are correcting a single position or refreshing the set across the airframe.

Fasteners: Only the clamp is listed in the package contents. Plan on re-using the original fasteners, and inspect each one for stretched threads, a rounded drive, or a damaged locking feature before it goes back in.

Interface Condition: This is a friction joint. Keep both mating faces clean, dry, and free of oil, grease, and anti-seize, because anything that lowers friction at the interface lowers retention for the same clamping force.

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🧰 Fitment Verification Before You Order

This listing is DJI material number YC.JG.QX002177. 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 Lower Propeller Clamp 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
• Propulsion rebuild projects
• Preventative maintenance programs
• Daily commercial operations
• Emergency repair inventory
• Professional agricultural drone operators

Especially valuable during:

• Spring spraying season
• Summer application windows
• Propeller service and swap work
• Propulsion system rebuilds
• Multi-aircraft fleet maintenance
• Seasonal rebuilds
• Emergency repairs
• High-hour commercial operations

When the blades carry the whole aircraft, keeping retention hardware fresh keeps operations moving.

Any scheduled propeller change, which is the one time the clamp is exposed with no extra labor attached. Blades come off on a routine that most operations already run, and the retention hardware underneath them is right there, clean, and easy to assess. Inspecting and renewing on condition at that moment costs minutes. Discovering the same wear later means taking a rotor apart specifically for it, usually at a worse time.

Chasing an airframe that has never flown as smoothly as the rest of the fleet. Vibration that has been present since the machine was new, or since a repair, often traces to a retention joint that has never gripped properly rather than to a part that has failed. Fresh, known-good hardware in the suspect position removes one variable cleanly and lets you decide whether the remaining vibration belongs to the motor, the arm, or the blades.

Inspection after a blade strike, a hard landing, or a rollover. A blade that contacts anything transmits a shock load straight through the retention hardware, and the damage is often invisible: a clamp can be distorted enough to lose grip without showing a crack or a bend that anyone would notice. Any rotor that has taken an impact should have its retention hardware inspected closely and replaced rather than assumed sound.

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💡 Why This Part Matters

Propellers get inspected before every flight; the clamps holding them rarely get a second look — and that's exactly backwards, because the clamp decides how well every propeller ever installed under it performs. A perfect blade in a tired clamp flies like a worn blade.

Clamp wear also compounds silently: fading grip becomes micro-movement, micro-movement becomes vibration, and vibration accelerates wear on the clamp, the propeller, and the motor bearings all at once — the aircraft paying interest on a part that costs almost nothing to replace. The crews with the smoothest fleets check clamp grip at every prop swap and refresh retention hardware on schedule.

The Lower Propeller Clamp helps maintain:

• Blade mounts worth trusting
• True rotation at every position
• Low-vibration propulsion
• Protected motors and bearings
• Two-model fleet coverage
• Professional fleet standards
• Increased aircraft uptime
• Reliable commercial performance
• Long-term operational confidence

Flying worn retention hardware, operators risk:

• Vibration spreading through the aircraft
• Blades wearing unevenly on loose mounts
• Motor bearings paying the price
• Blade attachment doubts in flight
• Interrupted missions
• Unexpected downtime
• Lost spraying opportunities
• Reduced return on investment

For practical, hardworking operators, the value is simple:

Protect the clamp. Protect the blades. Protect the mission. Protect the season.

Professional DJI Agras operators understand that stable flight is built at the mounting points. Keeping fresh lower propeller clamps on hand means blades locked tight all season instead of vibration grinding through the propulsion system — and that difference is what separates a good season from a frustrating one.

When a lower clamp is found worn, the inspection should not stop at the clamp. Check the motor bearing by hand for roughness or axial play, because months of vibration have been feeding into it. Look at the blade root for elongated holes, crushing, or cracks where it has been working. Check the arm and its fasteners, and look at the upper rotor set on the same arm, since a vibrating arm punishes everything mounted to it. Then look at the fasteners themselves, which have been cycling under a joint that was not holding.

It is worth being honest about what usually causes this wear, because most of it is procedural. Hurried blade swaps done without cleaning the faces trap grit in the joint. Reused fasteners with tired locking features never hold the stack. Pulling one fastener straight to full torque before the others cocks the clamp. Prying a stuck blade loose loads the clamp in a direction it was never designed for. Fixing the habit is as important as fixing the part, or the new clamp wears out on the same schedule as the old one.

Lower rotor hardware lives in the worst environment on the aircraft, and how the machine is handled between flights decides how fast it ages. Landing and taking off in loose dirt drives dust up into the joint. Pressure washing aimed straight at the rotor head pushes grit and water into the interface instead of removing them. Chemical drift dries on the mating faces. Transporting the aircraft with the blades folded and the arms bouncing on a trailer adds load cycles nobody counts. A rinse with low pressure, dried properly, is worth more than any inspection interval.

Handle the new clamp as the precision part it is. Keep it bagged until the moment it goes on, so the mating faces do not collect grit or scratches in a toolbox. Do not mix new and old hardware within a single rotor position. If you drop it on concrete, put it aside, because a retention part that has taken an impact can be distorted by an amount you will never see and cannot measure in the field, and that is not the place to gamble over a loaded aircraft. Write the install date on your maintenance record so the next decision has something behind it.

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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 Lower Propeller Clamp (YC.JG.QX002177)

Component: Lower Propeller Clamp

DJI material number: YC.JG.QX002177

Product category: Propellers

Compatible aircraft: DJI Agras T50

Part classification: Genuine DJI OEM replacement component

Condition: Brand new — never installed, never flown

Quantity supplied: 1 × Lower Propeller Clamp

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

Also searched as: DJI Agras T50 Lower Propeller Clamp; T50 Lower Propeller Clamp; DJI T50 lower propeller clamp replacement; DJI Agras Lower Propeller Clamp; Lower Propeller Clamp replacement part; Lower Propeller Clamp OEM

Definition: The Lower Propeller Clamp 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 lower propeller clamp? The official DJI material number is YC.JG.QX002177. Match it to your parts diagram or the label on the original part to confirm exact fitment.

What is the DJI Agras lower propeller clamp? It is the retention hardware that secures the lower propeller assembly to the propulsion system on the DJI Agras T50 and T40, holding clamping force through high-RPM loading and full payload lift. Ares Acres supplies it as a direct-fit OEM replacement. It carries DJI material number YC.JG.QX002177.

Which DJI Agras models does this lower propeller clamp fit? The clamp fits the DJI Agras T50 and the DJI Agras T40, installing at the lower propeller mounting assembly.

Do I need the lower propeller clamp or the upper propeller adapter? Match the part to the rotor position with the problem. This clamp is the retention hardware for the lower blade assembly; the upper blade position uses a separate upper propeller adapter. If the play or vibration traces to the lower rotors, this is the part.

What are the signs a propeller clamp needs replacing? Replace it when you find play or looseness at the lower propeller mount, clamping force that no longer holds, worn or polished mating surfaces, cracked or deformed clamp material, uneven propeller seating, over-torque damage, or rising vibration traced to the lower rotors.

How do I check propeller clamping force during a blade swap? With the propeller removed, inspect the clamp and its mating surfaces for wear or polishing, then check the reassembled mount for any detectable movement. Retention hardware wears invisibly, so the first detectable play is the replacement point.

Can a worn propeller clamp damage other parts of the aircraft? Yes. Relaxed grip lets micro-movement into the mount, that movement becomes vibration, and the vibration accelerates wear on the clamp, the propeller, and the motor bearings simultaneously.

Why do lower propeller clamps wear faster than expected? The lower rotors sit closest to the ground and take the most dust and field grit, which grinds into the clamp interface. Add torque cycling from thousands of flights, repeated propeller swaps, vibration fretting, and over-tightening during hurried installs, and grip fades.

Where can I buy a genuine OEM propeller clamp for a DJI Agras T50 or T40? Ares Acres is an authorized DJI Agras reseller stocking OEM propulsion retention hardware for U.S. farmers, aerial applicators, and commercial fleets running heavy-payload spray operations, 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 YC.JG.QX002177.

How do I tell a loose clamp from a worn motor bearing?

Watch what moves. With the battery disconnected and the blade restrained, work the blade gently in and out of its plane of rotation while you watch the motor. If the blade assembly moves and the motor rotor stays perfectly still, the play is in the retention joint. If the motor rotor tips, rocks, or shifts along with the blade, the bearing has play and the clamp is innocent. A rough or gritty feel when you spin the motor by hand points the same way.

What torque do I tighten this clamp to?

No torque figure is published for this component here, and a wrong number is worse than no number, so use the value and the sequence in the DJI service documentation for your aircraft with a calibrated driver. What matters to understand is why: this is a friction joint, so too little clamping force lets the faces fret and wear, while too much distorts the clamp and can crack it. Pull the fasteners up evenly in stages rather than taking one straight to full torque.

Can I just re-tighten a clamp that has gone loose?

Once, after a proper inspection, and only if the faces are clean and undamaged. If the same position comes loose a second time, stop re-torquing it. Repeated loosening means the clamped stack is no longer holding load, which is what a worn, distorted, or contaminated joint does. Every additional cycle at that point polishes the surfaces further and makes the next fix less likely to hold.

Should I replace all the lower clamps at once?

There is a good argument for it on an aircraft with real hours. Every lower position has flown the same flights, breathed the same dust, and been swapped the same number of times, so one worn clamp is decent evidence about the rest. Matched hardware across the airframe also makes vibration diagnosis simpler, because you are no longer comparing a new joint against three old ones when something feels off.

There is black powder around the clamp joint. What is it?

That is fretting debris, oxidized metal produced by two clamped surfaces micro-moving against each other under load. It is the clearest evidence you can find that grip has been lost, and it usually appears before any play you can feel. It also makes things worse once it forms, because the powder is abrasive and grinds the faces every time the joint moves. Wiping it away does nothing about the cause.

Can I clean the clamp faces with sandpaper or a wire wheel?

No. Those surfaces have to stay flat and stay in their original condition to grip properly, and abrasives change both. A wire wheel rounds edges and leaves a polished face with less friction than it started with, and sandpaper embeds grit into the surface that then acts as a spacer in the joint. Clean with a lint-free cloth, and if the face is damaged enough to need more than that, the part is finished.

Should I use anti-seize or thread locker on this?

Never on the clamping faces. A friction joint holds because the two surfaces grip each other, and any lubricant on the interface reduces the retention you get for a given clamping force, which is the whole point of the part. On the threads, use only what the DJI service documentation specifies for your aircraft, because a locking compound also changes what a given torque value actually achieves.

My aircraft only vibrates when the tank is full. Does that rule out the clamp?

It points at the clamp rather than away from it. A joint that has lost some of its grip will still hold under the light loads of a test hover and start moving once the rotors are producing real lift. That is why a marginal retention problem so often passes a pre-flight check and shows up over a customer's field. Judge the aircraft under representative load, not on an empty hover.

I dropped the new clamp on concrete. Can I still fit it?

Set it aside and use another one. A retention component can be distorted by an impact in ways that leave no visible mark and that you have no way to measure in a field shop, and any distortion means the faces no longer meet evenly and the grip is uneven from the first flight. Compared with the cost of losing a rotor on a loaded aircraft over someone's crop, a spare clamp is not an expensive decision.

Do I need to rebalance or recalibrate anything after fitting a new clamp?

There is nothing to calibrate electronically, but the job is not finished until it is verified. Re-check by hand for movement, fold and unfold the blade through its range, run the aircraft unloaded and then at a low hover, and re-check the fasteners after the first flight and at the end of the first loaded day. Most importantly, confirm the vibration you were chasing is actually gone before you go back to loaded work.

Is this a genuine DJI OEM Lower Propeller Clamp?

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 YC.JG.QX002177 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 Lower Propeller Clamp 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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