Bronze Gears
Bronze gears for wear pairs against steel, run-in quickly and resist corrosion.
Bronze gears used where they run against a hardened steel worm or pinion, so the wear lands on the bronze. They bed in quickly and take a load spike better than a brittle material.
4–6 weeks
5 pieces
ISO 9001:2015
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Module range | 1–8 | module |
| Tooth quality | AGMA 8–10 | class |
| Bore tolerance | H7 | - |
| Hardness | 70–100 | HB |
| Load capacity | Lower than steel | note |
| Damping | Good - quiet running | note |
Available Materials
- Bronze C932 (SAE 660)
- Bronze C90700
- Aluminium bronze C954
Typical Applications
- Worm wheels
- Slow-speed drives
- Marine gearboxes
- Valve actuators
- Pump drives
Surface Finishes
- As-cut
- Hobbed
- Machined bore and keyway
- Polished flanks
- None (corrosion resistant)
Industries Served
- Marine
- Industrial Equipment
- Energy & Oil & Gas
- Water Treatment
- Agricultural Machinery
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Bore tolerance at H7 is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Module range at 1–8 module decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Order size
- Minimum order is 5 pieces, so on a first order setup and programming are spread over very few parts and they are most of the price. Repeat orders at the same quantity are cheaper without anything on the drawing changing.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Rockwell hardness tester on the part, not only against the mill certificate
- Bore gauges and an optical comparator for hole position and edge form
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Why not make the wheel from steel too?
- Because two similar metals in sliding contact gall and weld at the surface. Bronze against hardened steel wears slowly and predictably, and the bronze part is the cheap one to replace.
Related part families
Worm Gears & Wheels
Worm shafts and bronze wheels cut to matched centre distance, for high-ratio right-angle drives.
Plastic Gears
POM, nylon and PEEK gears cut or moulded, running quiet and needing no lubrication.
Internal & Ring Gears
Internal gears shaped or ground in bores from 60–800 mm, for planetary and clutch drives.