OEM Carbon Steel CNC Turned and Milled Parts Supplier

XCM CNC provides build-to-print OEM carbon steel turn-mill machining and can review grades such as 45#, 40Cr, Q235, and 1045 against load path and process route before production starts.

Imported equipment from brands such as DMG and Mazak is used together with domestic machines, with standard lead time often reviewed in the 10-15 day range and sample lead time in the 3-7 day range. Heat treatment sequence, rust protection, and sample approval are confirmed first, then turn-mill machining is arranged for heavy-load, hydraulic, and transmission parts such as pins, flanges, bushings, and connectors. XCM CNC is certified to ISO 9001, ISO 13485, IATF 16949, and GJB9001C, with MOQ from 1 piece.

Machining Parameters and Tolerances

Assembly-Fit Tolerance for OEM Mating Components

Carbon steel OEM parts commonly need shaft diameters at h6 around +/-0.005 mm and bores at H7 around +/-0.006 mm to be controlled together. XCM CNC uses precision turning and milling routes to support those fits, while mating-face roughness can be controlled around Ra 0.8 um. Assembly relationships are confirmed during drawing review so fit interference does not appear later in production.

Multi-Process CNC Machining for Complex OEM Parts

Complex OEM carbon steel parts often combine milling, turning, boring, tapping, and deburring in one route. Three-axis milling travel up to 3000 x 1600 x 1400 mm covers large mounting plates, while turning up to diameter 1250 mm supports heavy shafts. Multi-face parts can be machined in fewer setups to reduce positional deviation from repeated clamping.

GD&T Control on Carbon Steel OEM Parts

Typical geometric values include position 0.015 mm, coaxiality 0.012 mm, circular runout 0.01 mm, flatness 0.02 mm, perpendicularity 0.02 mm/1000 mm, and parallelism 0.03 mm/1030 mm. For heat-treated parts that return for finish machining, datum retention is reviewed during drawing evaluation and aligned with the assembly requirement.

Inspection Report Packages for OEM Orders

XCM CNC can provide CMM reports, FAI reports, and material certificates in the customer format. Hexagon CMM is used for position and coaxiality checks, while height gauges can support depth and step verification. OEM customers can define report layout, inspection scope, and sampling ratio during ordering, with full inspection used for critical fit dimensions when needed.

Certified Quality Systems and Imported Equipment

XCM CNC is certified to ISO 9001, ISO 13485, IATF 16949, and GJB9001C, covering quality-system requirements for medical, automotive, and military programs. Production uses DMG, Mazak, Matsuura, Brother, and other machining centers together with Hexagon CMM and 2.5D vision inspection.

Machining Range from Small Connectors to Large Structures

The machining range covers parts from miniature connectors and sensor housings to large structural components. Three-axis milling reaches 3000 x 1600 x 1400 mm and turning reaches diameter 1250 mm with length 2000 mm, so both small precision parts and mechanical components longer than 2 meters can be reviewed in one supply chain.

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 operations can run on domestic or Taiwan machines, while tighter precision work can move to imported equipment such as DMG or Mazak to avoid unnecessary high-hour-rate use.

Version Management and Sample Traceability for OEM Parts

OEM carbon steel projects often involve grade changes, rust-protection revisions, and structural updates. XCM CNC records each sample round, inspection data, and process change by version so outdated drawings or old routes do not continue into production. NDA support is available before batch release.

Clear Communication from Quotation to Delivery

During quotation, STEP, DWG, or PDF drawings are checked against grade, load direction, heat treatment, and rust-protection requirements so the critical conditions are defined early. After the sample passes, the process route is fixed and the batch can move into the standard 10-15 day lead-time window, while heavy-load faces, chamfers, and assembly relationships are confirmed before cutting starts.