What is the most common bronze grade for CNC machining?

C93200 (bearing bronze) is the most common grade for machined components. It offers excellent wear resistance and high load capacity for bearings and bushings. C95400 aluminum bronze is used for high-strength pump and valve applications.

How does bronze compare to brass for CNC machining?

Bronze is harder, stronger, and more wear-resistant than brass but less machinable. Brass is preferred for decorative and electrical applications. Bronze is specified for bearing and heavy-load applications.

What is the difference between bronze and brass?

Bronze is primarily copper-tin alloy with additional elements. Brass is primarily copper-zinc alloy. Bronze is generally harder, stronger, and more corrosion-resistant than brass.

What tolerances can bronze machining achieve?

Standard work holds ±0.02-0.05mm. Precision work holds ±0.01mm. Grinding achieves ±0.005mm for bearing surfaces.

What industries use CNC bronze machining?

Industrial equipment bearings, marine components, oil and gas, automotive, and mechanical engineering. Bronze is used where low friction and high wear resistance are required.

Can bronze be heat-treated?

Aluminum bronze grades can be heat-treated for increased strength. Bearing bronze grades are typically used in the as-cast or annealed condition.

CNC Bronze

CNC bronze machining is the precision processing of bronze alloys using computer-controlled cutting tools. Bronze is a copper-based alloy, typically with tin as the primary alloying element, offering superior wear resistance, high strength, excellent corrosion resistance, and good machinability. Common grades include C93200 (bearing bronze), C95400 (aluminum bronze), C63000 (nickel aluminum bronze), and C86300 (manganese bronze).

Bronze provides exceptional bearing properties—low friction, high load capacity, and good thermal conductivity—making it ideal for moving contact applications. It machines well with carbide tooling, though the material is abrasive and requires positive rake geometry. Tolerances are held to ±0.02-0.05mm standard. Applications include bearings, bushings, worm gears, pump impellers, valve seats, and marine hardware.

Our CNC Machining Services

From prototype to production — reliable quality, on-time delivery

We provide precision CNC machining services for a wide range of materials including aluminum, steel, stainless steel, copper, brass, titanium, PEEK, PTFE, acetal, nylon, and other engineering plastics. Our manufacturing capabilities cover 3-axis, 4-axis, and 5-axis CNC milling, as well as CNC turning, suitable for both prototype development and high-volume production runs.

With ISO 9001:2015 certification and a commitment to quality, we serve customers across aerospace, automotive, medical, electronics, industrial equipment, and consumer goods industries. Our in-house capabilities include surface finishing, anodizing, powder coating, heat treatment, and inspection with CMM and optical measurement equipment.

We offer competitive pricing, flexible lead times, and full material traceability. From simple brackets to complex precision components, we deliver parts that meet your specifications with reliable quality and on-time delivery.

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Materials

Aluminum 5083-H111

Aluminum 5083-H111 | 3.3547 | 54300| AlMg4.5Mn0.7

Aluminum 5083 (CNC) is a strain hardening aluminum alloy with excellent corrosion resistance. Suitable for marine applications. Can be welded.

Understand Aluminum 5083-H111

Aluminum 6063

Aluminum 6063 | EN AW-6063 | 62400| AlMg0,7Si

Aluminum 6063 has good mechanical properties and can be heat treated. Suitable for aerospace applications. Can be welded.

Understand Aluminum 6063

Aluminum 5052

Aluminum 5052 | EN AW-5052 | 3.3523 | AlMg2,5

Aluminum 5052 is a strain hardening aluminum alloy with excellent corrosion resistance. Suitable for marine applications. Can be welded.

Understand Aluminum 5052

Aluminum 2024-T351

Aluminum 2024-T351 | 3.1355 | 24530 | AlCu4Mg1

Aluminum 2024 is a high-strength alloy with excellent fatigue resistance. Suitable for aerospace applications.

Understand Aluminum 2024-T351

Aluminum 7050

Aluminum 7050 | EN AW-7050 | 3.4144| AlZn6CuMgZr

Aluminum 7050 has excellent mechanical properties with good ductility, high strength, toughness and good resistance to fatigue. Suitable for aerospace applications.

Understand Aluminum 7050

Aluminum MIC-6

Aluminum MIC6

Aluminum MIC6 is a light weight material that can be easily machined at high speed and is free from tension, contaminants and porosity.

Understand Aluminum MIC-6

Aluminum 6082-T651

Aluminum 6082-T651 | 3.2315 | 64430 | AlSi1MgMn

Aluminum 6082-T651 (CNC) has very similar composition and properties to 6061, with slightly higher tensile strength. Compliant with British Standards.

Understand Aluminum 6082-T651

Aluminum 2017A

Aluminum 2017A | 3.1325 | 24530 | AlCu4MgSi

Aluminum 2017 has a higher ductility and formability than Aluminum 2014 and has intermediate strength.

Understand Aluminum 2017A

Aluminum 7075-T651

Aluminum 7075-T651 | 3.4365 | 76528 | AlZn5.5MgCu

Aluminum 7075-T651(CNC) is an aerospace-grade material with excellent strength-to-weight ratio and strength and hardness comparable to steels. T651 is the temper of Aluminum 7075, and to achieve this temper, the alloy is solution heat-treated, stress relieved, and then artificially aged.

Understand Aluminum 7075-T651

Aluminum 2014

Aluminum 2014 | 3.1255 | 24345 | AlCu4SiMg

Aluminum 2014 is easily machined and can be hardened to get strengths comparable to steel, but is prone to corrosion. Suitable for aerospace applications.

Understand Aluminum 2014

Aluminum 6061-T651

Aluminum 6061-T651 | 3.3211 | 65028 | AlMg1SiCu

Aluminum 6061-T651 is commonly used in aerospace, automotive and construction industry, as it is valued for its high strength, excellent machinability, and good weldability. The "T651" designation indicates that the material has been heat-treated to a specific level of hardness.

Understand Aluminum 6061-T651

Aluminum 7075-T7351

Aluminum 7075-T7351 | 3.4365 | 76528 | AlZn5.5MgCu

Aluminum 7075-T7351 is commonly used in aerospace and defense applications, as well as automotive and transportation, as it is valued for its high strength, excellent machinability and good fatigue resistance. The "T7351" designation indicates that the material has been heat-treated to a specific level of hardness.

Understand Aluminum 7075-T7351

Aluminum 6061-T6

Aluminum 6061-T6 | 3.3211| 65028| AlMg1SiCu

Aluminum 6061 (CNC) is the most popular aluminum alloy. It has good strength-to-weight ratio, excellent machinability and natural corrosion resistance.

Understand Aluminum 6061-T6

Aluminum 6082

Aluminum 6082 | 3.2315 | 64430| AlSi1MgMn

Aluminum 6082 (CNC) has very similar composition and properties to 6061, with slightly higher tensile strength. Compliant with British Standards.

Understand Aluminum 6082

Aluminum 6060

Aluminum 6060 | 3.3206 | AlMgSi

Alloy 6060 offers good strength, relatively good corrosion resistance and is suitable for decorative anodizing.

Understand Aluminum 6060

Aluminum 7075-T6

Aluminum 7075-T6 | 3.4365 | 76528 | AlZn5,5MgCu

Aluminum 7075-T6 (CNC) is an aerospace-grade material with excellent strength-to-weight ratio and strength and hardness comparable to steels.

Understand Aluminum 7075-T6

Applications

Bearings & Bushings

Sleeve bearings and thrust washers
Flanged bearings and guide bushings
Spherical bearings and wear plates
Machine tool slide bearings

Industrial Equipment

Pump impellers and wear rings
Valve seats and guides
Gear components and worm gears
Wear plates and guide rails

Marine

Propeller shafts and fittings
Marine hardware and fasteners
Seawater pump components
Shipboard valve components

Oil & Gas

Wellhead components and seals
Downhole bearing surfaces
High-pressure valve seats
Packer components

Automotive

Transmission thrust washers
Synchronizer rings
Pilot bearings and bushings
Selector fork components

Capabilities

We machine all common bronze grades: C93200 bearing bronze, C95400 aluminum bronze, C63000 nickel aluminum bronze, and C86300 manganese bronze. Equipment includes CNC turning centers and milling centers. Carbide tooling with positive rake geometry and appropriate coolants are used for efficient machining. Tolerances held to ±0.02-0.05mm standard, ±0.01mm precision. ISO 9001:2015 certified.

Finishes

As-Machined

Standard finish for bronze parts
Functional bearing surfaces
Ra 1.6 – 3.2μm typical

Grinding

Precision finish for bearing surfaces
Ra 0.2 – 0.8μm
Used for critical diameters

Polishing

High-gloss reflective surface
Used for visible decorative bronze
Ra 0.4μm achievable

Bead Blasting

Uniform matte texture
Used for industrial parts
Removes tool marks

Electroless Nickel Plating

Additional wear and corrosion protection
Uniform coating on complex geometries
Hard, lubricious surface

Technical Specs

Bronze Grade	Type	Tensile (MPa)	Yield (MPa)	Hardness	Key Properties	Common Uses
C93200	Bearing Bronze	240-310	140-170	65-80 HB	High load capacity, good wear	Bearings, bushings, wear plates
C95400	Aluminum Bronze	550-650	240-310	140-200 HB	High strength, corrosion-resistant	Pump parts, valve seats, gears
C63000	Nickel Aluminum Bronze	620-720	310-380	160-220 HB	High strength, seawater corrosion	Marine shafts, pump impellers
C86300	Manganese Bronze	620-690	310-380	170-220 HB	High strength, wear-resistant	Heavy-duty gears, bushings
C90500	Gunmetal	240-280	120-150	70-80 HB	Good castability, corrosion-resistant	Valves, fittings, decorative

Parameter	Capability
Max Part Size (Milling)	2,000mm x 800mm x 600mm
Max Part Size (Turning)	600mm diameter x 1,500mm length
Standard Tolerance	±0.02 – 0.05mm
Precision Tolerance	±0.01mm
Surface Finish (As-Machined)	Ra 1.6 – 3.2μm
Surface Finish (Ground)	Ra 0.2 – 0.8μm

FAQs

What is the most common bronze grade for CNC machining?

C93200 (bearing bronze) is the most common grade for machined components. It offers excellent wear resistance and high load capacity for bearings and bushings. C95400 aluminum bronze is used for high-strength pump and valve applications.
How does bronze compare to brass for CNC machining?

Bronze is harder, stronger, and more wear-resistant than brass but less machinable. Brass is preferred for decorative and electrical applications. Bronze is specified for bearing and heavy-load applications.
What is the difference between bronze and brass?

Bronze is primarily copper-tin alloy with additional elements. Brass is primarily copper-zinc alloy. Bronze is generally harder, stronger, and more corrosion-resistant than brass.
What tolerances can bronze machining achieve?

Standard work holds ±0.02-0.05mm. Precision work holds ±0.01mm. Grinding achieves ±0.005mm for bearing surfaces.
What industries use CNC bronze machining?

Industrial equipment bearings, marine components, oil and gas, automotive, and mechanical engineering. Bronze is used where low friction and high wear resistance are required.
Can bronze be heat-treated?

Aluminum bronze grades can be heat-treated for increased strength. Bearing bronze grades are typically used in the as-cast or annealed condition.