6CNC · Custom precision parts
C932 Bronze
CNC Machining
Workhorse bearing bronze for bushings and sliding components
C932 bronze, commonly known as SAE 660, is one of the most widely used bearing bronzes.
Reference component geometry; alloy grade is confirmed by material certification.
Custom C932 Bronze Parts with 6CNC
Copper Development Association data describes C932 as a workhorse bearing alloy and lists a machinability rating around 70. It is used where low friction, conformability, wear behavior, and reliable machining are important.
Why C932 is used for bearings
C932 is a copper-tin-lead-zinc bronze. Its composition provides good anti-friction behavior, good embeddability, resistance to seizure, corrosion resistance in many environments, and useful machinability.
It is particularly suitable for bushings and sleeve bearings operating under moderate loads and speeds with suitable lubrication.
Material values are typical references, not design allowables. Confirm the governing specification, stock form, material certificate and heat-treatment condition for your part.
CNC turning C932
Most C932 components are rotational:
- Bushings
- Sleeves
- Plain bearings
- Thrust washers
- Wear rings
- Valve guides
- Pump bushings
Machining often includes OD turning, ID boring, facing, grooving, threading, chamfering, and lubrication grooves.
Bearing clearance matters more than “tight tolerance”
A bronze bushing should not automatically be designed for the smallest possible bore tolerance.
The correct running clearance depends on shaft size, load, speed, lubrication, temperature, housing stiffness, and installation method.
For press-fit bushings, the bore can shrink after installation. The drawing should account for installed geometry rather than treating the free-state bore as the only functional dimension.
CNC milling C932
Milled applications include wear plates, guide blocks, machine-slide components, thrust plates, and custom low-friction mechanical interfaces.
Flatness, parallelism, and surface finish can matter more than cosmetic appearance.
C932 vs. brass
C360 brass may machine faster, but C932 provides bearing-specific tribological performance.
Use C932 for sliding bearings, bushings, wear interfaces, and lubricated motion. Use brass for general fittings, connectors, threads, and precision hardware when bearing behavior is not required.
Surface finish
Many C932 parts are used as machined. Bearing bores may also be honed or otherwise finished when the application requires a controlled surface.
Surface roughness should be tied to lubrication and load rather than appearance.
Typical C932 parts
- Sleeve bearings
- Bushings
- Thrust washers
- Wear plates
- Pump bushings
- Valve guides
- Guide sleeves
- Pivot bushings
- Machinery bearings
Why 6CNC
6CNC focuses on custom precision manufacturing from prototype through small-batch production. Depending on the part, we can combine CNC milling, CNC turning, 5-axis machining, mill-turn, grinding, EDM, finishing coordination, and dimensional inspection.
Our quality capability includes CMM, image measurement, surface-roughness measurement, material analysis, gauges, micrometers, calipers, and other inspection tools. FAI, SPC, PPAP, COC, material traceability, and customer-specific inspection records can be supported when specified.
Send your 3D CAD model, controlled drawing, quantity, material condition, finish, and inspection requirements for a manufacturability and quotation review.
From Drawing to Finished Part
01
Share your files
Send your CAD model, controlled drawing, quantity and specified material condition.
02
Confirm the route
Review stock, machining, heat treatment, finishing and inspection together.
03
Machine and finish
Produce the part to the agreed drawing, allowing for any heat-treatment movement.
04
Inspect and deliver
Verify the required dimensions and supply the agreed inspection documentation.
Technical reference: Copper Development Association — C93200. Values depend on stock form, specification and condition; use certified material data for final design.
Material Selection at a Glance
| Material | Primary selection driver | Typical part focus |
|---|---|---|
| C932 Bronze | Lubricated bearing and wear behavior | Bushings, sleeves and sliding interfaces |
| C360 Brass | Free machining and detailed turned geometry | Fittings, inserts and threaded hardware |
Define the operating conditions
Specify loads, temperature, corrosion exposure, conductivity or weight requirements before selecting the material.
Confirm the manufacturing condition
State the exact grade, stock form, heat treatment, finish and inspection requirements on the controlled drawing.
Compare Materials & Grades
Also compare: Titanium Grade 2 · Titanium Grade 5 · C360 Brass · C110 Copper · C145 Tellurium Copper · Magnesium AZ31B · Inconel 625 · Inconel 718
Materials library · Aluminum grades · Stainless steel grades
FAQs
Is C932 the same as SAE 660?
C93200 is commonly known as SAE 660 bearing bronze.
Is C932 easy to machine?
Yes. It has good machinability for a bearing bronze.
What is it used for?
Bushings, bearings, thrust washers, wear plates, pump components, and sliding interfaces.
Does C932 contain lead?
Yes. Compliance requirements should be checked for regulated applications.
Can C932 bushings be press fit?
Yes, but bore contraction after installation should be considered in the design.
Start your project with 6CNC
Let’s review your C932 Bronze part.
Share the drawing and service conditions for a project-specific machining and quotation review.
Include with your enquiry
- 3D CAD and controlled PDF drawing
- Material grade, stock condition and applicable specification
- Quantity and delivery target
- Heat treatment, hardness and critical dimensions
- Surface finish and inspection requirements