Precision Bronze CNC Machining and Manufacturing Services
PartsMake produces custom bronze components for engineering teams and procurement departments, from one-off prototypes and low-volume pilot runs to high-volume production batches.
Complex geometries, tight tolerances, and demanding wear, friction, and marine-environment requirements are managed through a controlled CNC workflow.
±0.005 mm
Precision tolerance
Ra 0.4–3.2
Surface roughness μm
24–48 hr
Quote response target
Built for demanding motion
Wear-resistant, self-lubricating bronze solutions for bearings, gears, slides, and marine assemblies.
Material engineering
Choose bronze for wear, friction, and corrosion performance.
Bronze alloys are selected when steel or aluminum cannot provide the required tribological performance. In heavy-duty and marine environments, bronze can deliver essential wear resistance, low friction, and corrosion protection.
Our primary focus includes leaded tin bronze such as C932 for bearing applications and aluminum bronze such as C954 for high-strength structural requirements.
Selection guidance
Use C932 when machinability, low friction, and bearing conformity are priorities. Consider C954 when strength, hardness, wear resistance, and marine corrosion performance lead the specification.
| Property | C932 (SAE 660) | C954 Aluminum Bronze |
|---|---|---|
| Primary use | Bushings, bearings | Gears, wear plates, marine |
| Machinability | Excellent | Moderate |
| Hardness (HB) | 65–75 | 170–190 |
| Tensile strength | 35 ksi | 85–90 ksi |
| Corrosion resistance | Good | Excellent in marine environments |
| Friction | Very low | Low |
CNC process capability
Machining strategies matched to bronze geometry.
Our shop floor is configured for the chip-breaking and thermal characteristics of bronze, protecting surface finish integrity and dimensional accuracy from raw stock through final inspection.
CNC turning & mill-turn
Ideal for bushings, sleeves, and pins. Mill-turn centers add keyways, flats, and cross-holes in a single setup to reduce cost and error.
5-axis CNC milling
Simultaneous 5-axis motion supports worm gears, complex housings, structural brackets, and intricate multi-face features.
Swiss machining
Used for miniature bronze components and high-volume production of precision pins and connectors with consistent repeatability.
Application fit
Bronze components for controlled motion and harsh environments.
We support industrial, marine, and aerospace projects where bearing performance, self-lubrication, wear resistance, and corrosion protection directly affect service life.
Discuss your component requirementsBushings & bearings
High-performance bearing surfaces for rotating shafts and heavy-load pivots.
Worm gears
Precision-cut tooth profiles designed for wear resistance and reliable engagement.
Marine hardware
Corrosion-resistant parts for pumps, valves, and underwater assemblies.
Wear plates & slides
Precision-ground plates for heavy machinery guides and sliding surfaces.
Structural connectors
High-strength aluminum bronze components for load-bearing applications.
Technical specifications
Controlled dimensions, finish, and capacity.
Our CNC workflow includes in-process inspection to ensure critical features meet specified tolerances.
- Standard tolerance
- ±0.01–0.05 mm
- Precision tolerance
- Down to ±0.005 mm
- Surface roughness
- Ra 0.4–3.2 μm
- Maximum turning
- Ø500 × 1000 mm
- Milling capacity
- 1200 × 800 × 600 mm
Quality assurance
Inspection documentation for production confidence.
Every bronze part is inspected for dimensional accuracy and material specification. Full documentation packages are available for projects requiring batch traceability.
CMM inspection
Automated coordinate measurement for complex 3D profiles.
Surface finish analysis
Profilometer testing verifies Ra values for bearing surfaces.
Hardness testing
Verification of material temper and heat treatment consistency.
First Article Inspection
Detailed FAI reports for new production runs.
Beyond machining
Finished bronze components, ready for assembly.
Secondary operations can be combined with CNC machining to simplify your supply chain and deliver components ready for installation.
Precision grinding
Cylindrical and surface grinding for superior bearing diameters.
Hardware installation
Press-fit inserts, studs, and standoffs.
Surface preparation
Deburring, bead blasting, and custom cleaning for sensitive marine applications.
Assembly
Mechanical assembly into final housings or modules.
Request a quote
Let’s review your bronze component.
PartsMake reviews every RFQ for manufacturability, material availability, and cost-optimization opportunities.
Please provide
CAD files in STEP, STP, or IGES format, technical drawings in PDF, material specifications, and required quantities.
Facility address
Our engineering team will respond with a quote and lead time estimate within 24–48 hours.