China Brass CNC Machined Parts Factory

XCM CNC is a brass CNC machining factory in Shenzhen, operating under ISO 9001 and IATF 16949 quality systems and using equipment such as Brother machining centers and Jingshang automatic lathes for small-part batch production.

The factory can organize schedules around grades such as C360, C260, and CW617N, together with lead-free requirements and batch consistency control. MOQ can begin from 1 piece, with standard lead time often reviewed in the 10-15 day range. Nickel plating, anti-tarnish treatment, dimensional reinspection, material certificates, and protective packaging can all be coordinated by order for repeat supply of conductive connectors and instrument parts.

Machining Parameters and Tolerances

• Materials: C360 (free-cutting brass), C260 (cartridge brass), CW617N (European grade), selected by conductivity, wear resistance, and lead-free requirement
• Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft/bore fits; h6/H7 available
• Surface Finish: Ra 0.8 um turned surfaces, Ra 1.6 um milled contact faces, Ra 3.2 um general machined surfaces
• GD&T: Coaxiality 0.012 mm, runout 0.01 mm, cylindricity 0.011 mm, roundness 0.006 mm, position 0.015 mm
• Max Size: 3-axis milling 3000 x 1600 x 1400 mm; turning diameter 1250 x length 2000 mm
• Surface Treatment: Nickel plating (3-20 um), tin plating, anti-tarnish finish, passivation by order review
• Thread: Internal from M1.4, external from M2.0, up to M220; NPT / BSP / G / PT pipe threads; depth up to 4xD
• Batch Range: 1 piece to repeat production; standard lead time 10-15 days

Batch Turning for Terminals, Fittings, and Bushings

Batch turning of brass terminals, fittings, and bushings can run continuously on automatic lathes, with turned outer surfaces reaching Ra 0.8 um and shaft tolerances reviewed to h6 and h7 classes. Internal threads can start from M1.4, pipe threads can support NPT, BSP, G, and PT, and thread depth can reach 4xD. Batch-size consistency can be managed through lot sampling, while the scope of full inspection for critical dimensions is defined by order.

Large-Format and Structural Brass Machining Capacity

Three-axis milling travel up to 3000 x 1600 x 1400 mm and turning capacity up to diameter 1250 mm and length 2000 mm cover both micro terminals and larger installation blocks in brass. For larger parts above 500 mm, tolerance can be reviewed around +/-0.05 mm. Keyway width can start from 1.0 mm, groove width from 0.5 mm, flatness can reach 0.02 mm, and parallelism can be controlled around 0.03 mm over a 1030 mm datum length when the structure allows it.

Thread and Keyway Machining for Repeat Supply

Repeat-order threaded fittings and keyway parts can share standard tooling, datums, and inspection flow to reduce process variation from batch to batch. Threads are checked by go and no-go gauges, sealing faces can be machined to Ra 0.8 um, and hole position can be controlled around 0.015 mm. Keyways can follow the drawing standard from a minimum width of 1.0 mm, with fit surfaces reviewed around +/-0.003 mm for stable supply of bushings and transmission parts.

Batch Inspection Traceability and Material Certification

Batch brass parts can be supplied with material certificates, FAI reports, and plating thickness reports according to the order. Inspection can use equipment such as Hexagon CMM and a Leader height gauge. Critical dimensions can follow sampling or 100 percent inspection, threads are checked by go and no-go gauges, and fit surfaces can be rechecked after nickel plating. Records are archived by batch for repeat-order traceability and export documentation.

Certified Systems and Equipment Coverage

The factory organizes quality flow under ISO 9001, ISO 13485, IATF 16949, and GJB9001C, while using DMG, Mazak, Matsuura, Brother, and other equipment for brass turning, milling, and multi-face machining. For brass fittings, terminals, and small precision parts, drawing review can confirm conductive faces, threads, and surface-treatment requirements together.

Broad Size Coverage

The machining range covers both small connector-scale parts and larger structural blocks. Three-axis travel can reach 3000 x 1600 x 1400 mm and turning diameter can reach 1250 mm, while the actual route still depends on fixturing, grade, and surface-treatment requirements.

Tiered Equipment Strategy for Cost and Quality

XCM CNC uses a tiered equipment mix from mainland China, Taiwan, Japan, and Europe or the US. Lower-tolerance work can be arranged on domestic or Taiwan machines, while tighter precision work can move to imported machines such as DMG or Mazak. That matching helps control cost without putting simple features onto high-hour-rate equipment.

Batch Traceability and Material Certificates Archived by Order

Brass bar grade, lot information, and lead-free requirements can be tied to specific parts and inspection records by order, which suits long-running repeat orders and export projects. For terminals, fittings, and shielding parts, material proof, surface-treatment requirements, and the critical-dimension sampling scope can be locked first and then archived by batch.

Plating Reinspection and Protective Packaging Delivered Together

Nickel plating, anti-tarnish treatment, post-plating reinspection, and isolated packaging can be arranged as one delivery flow for batch brass parts so surface treatment and shipment timing stay aligned. Foam-separated cartons or wooden cases can be used for export shipments of connectors, valve fittings, and small instrument parts.