What the part has to do
- Take an impact and put the energy somewhere chosen.
- Survive mud, grit, spray and pressure washing.
- Come apart for transport, on folding aircraft, without loosening in flight.
- Fail in the cheap part rather than in the arm.
Material and finish
7075-T6 for clamps, hinges and lugs that carry the impact. PA66 or POM for feet and skid blocks that take the abrasion. 6061 only where the section is generous.
Hard anodise on the aluminium, because landing gear lives in grit and gets washed. Plastic feet in a bright colour, so a technician can see which part is meant to be replaced.
The features that decide it
Tolerance these. Let everything else on the drawing run to the general tolerance, because it costs money and changes nothing.
Internal corner radii on loaded parts
A sharp corner in a 7075 clamp ear is where the crack starts, and larger radii cut faster too.
Edge distance at fastener holes
A hole too close to an edge tears out through the edge.
Hinge bore and bush fit
Metal on metal goes oval in a season. A bush is a cheap part to replace.
Latch geometry
Wear should increase friction, not release the leg.
What we hold
| Feature | Held |
|---|---|
| Hinge bore | H7 or ±0.02 mm |
| Clamp bore | H7, to the measured tube |
| Everything else | General tolerance |
| Edge break | 0.2 to 0.4 mm, all edges |
Normal production figures for this shop, not a best case. Full tolerance reference.
What we need to quote it
- Aircraft mass and the descent rate the gear should survive
- Landing surfaces, which decide the foot material
- Which part you have chosen to be sacrificial
- Folding or fixed, and the latch you intend to use
- Whether the aircraft sprays, because that changes finish and drainage
Send what you have. A STEP file and a quantity are enough to start, and the rest sharpens the number.
Read before you draw it
Tools for this part
Run your part through them and send the answers with the model. It makes the quote sharper and the questions fewer.
Questions about landing gear parts
Can you advise which part should be sacrificial?
We can say which part in a set will fail first as drawn, based on section and material. Choosing which one should fail is your design decision, and it is worth making on purpose before the first production lot.
Do you make the tubes as well?
No. Carbon tube and composite legs are not made here. We machine the fittings at both ends, and we say plainly that the tube comes from elsewhere.
Quote this part
Send the model and the quantity. Price, lead time and any question that would cost you money if we guessed come back within 24 business hours, EXW, in USD.
Need the full form with tolerances, finish and documents? Open the RFQ page.
Other parts we cut
Arm and boom clamps
The joint that holds the arm on. It has to grip a tube that is never the diameter the catalogue says, without crushing it, and come off again after a season in the weather.
OpenMotor mounts and bells
A plate with four holes that decides whether a motor runs cool and whether the replacement one sits the same way the first did.
OpenGimbal brackets and yokes
A small part with a hard job. The camera has to point where the controller says it is pointing, through vibration, while weighing as little as possible.
OpenEnclosures and housings
The parts that keep water, dust and spray away from electronics, and the place where most ingress ratings are lost before the gasket is even chosen.
Open