Overview
XCM CNC is a China carbon steel CNC machining factory built for repeat-order supply and can coordinate grades such as 45#, Q235, 1045, and 40Cr across Brother, Taichung, and Qiaofeng machining centers plus large-part turning capacity.
Heat treatment, rust protection, material certificates, dimensional reports, and export protection can all be arranged in the same workflow, which suits batch delivery of hydraulic connectors, heavy brackets, flanges, and shafts. Standard lead time is often reviewed in the 10-15 day range and sample lead time in the 3-7 day range. XCM CNC is certified to ISO 9001, ISO 13485, IATF 16949, and GJB9001C, with MOQ from 1 piece.
Key Capabilities
Machining Parameters and Tolerances
- Materials: Carbon Steel – Q235, 45#, 1045, 40Cr; grade selected by load rating and heat treatment route
- Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft/bore fits; h6/H7 available
- Surface Finish: Ra 3.2 um milled, Ra 0.8 um turned/bored, Ra 0.4 um ground, Ra 0.2 um polished
- GD&T: Flatness 0.02 mm, parallelism 0.03 mm/1030 mm, coaxiality 0.012 mm, runout 0.01 mm, position 0.015 mm
- Max Size: Milling 3000 x 1600 x 1400 mm; turning diameter 1250 x 2000 mm
- Heat Treatment: Quenching, tempering, normalizing, stress relief by drawing review
- Thread: M1.4-M220, NPT/BSP/G/PT, depth 4xD, blind-hole effective depth 50 mm
- Batch Range: 1 piece to repeat production batches; sampling inspection plus full inspection on critical features
Large Carbon Steel Structure Machining for Industrial Supply
Large carbon steel work can be covered by milling travel up to 3000 x 1600 x 1400 mm and turning capacity up to diameter 1250 mm and length 2000 mm. Installation plates, bases, and heavy flanges can complete their major milling or turning operations on one machine. For larger parts above 500 mm, a tolerance around +/-0.05 mm is typical unless a fit-critical feature needs to be tightened separately by drawing.
Thread and Keyway Machining for Batch Parts
Thread sizes from M1.4 to M220 can be supported, including NPT, BSP, G, and PT pipe standards. Minimum keyway width can start from 1.0 mm and deeper threads can be reviewed up to 50 mm effective depth. Go and no-go gauges plus ring gauges are used for functional checks, while burr control on cross holes follows the needs of hydraulic blocks and valve bodies.
Batch Consistency Control for Repeat Orders
Repeat-order consistency depends on route standardization and sampling plans. The first lot can establish the benchmark with FAI, then later batches use full inspection on critical dimensions and sampling on regular dimensions. Position values around 0.015 mm and grouped-hole controls around 0.01 mm can be maintained from batch to batch when the route is fixed, and shaft tolerances can continue under h6 or h7 classes.
Traceability and Quality Records for Factory Supply
Each batch can be linked to material certificates, heat-treatment reports, and dimensional records. Surface-treatment files can include plating thickness in the 3-20 um range, salt-spray reports, and black-oxide or zinc-plating confirmation when specified. Traceability uses order and batch numbers as the main reference and report format can follow the customer requirement.
Specifications
| Product Name | China Carbon Steel CNC Machined Parts |
|---|---|
| Manufacturer | XCM CNC |
| Factory Location | Shenzhen, Guangdong, China |
| Quality System | ISO 9001, ISO 13485, IATF 16949, GJB9001C |
| Machining Process | CNC milling, CNC turning, drilling, tapping, deburring |
| Material | Carbon Steel |
| Material Grade | 45#, Q235, 1045, 40Cr with grade and process route confirmed per order |
| Tolerance | +/-0.03 mm standard CNC tolerance, critical dimensions by drawing review |
| Surface Roughness | Ra 3.2 um general machined surfaces, Ra 1.6 um mating surfaces by requirement |
| Surface Treatment | Zinc plating, black oxide, rust preventive coating by order review |
| Max Part Size | Milling travel 3000 x 1600 x 1400 mm, turning size up to diameter 1250 x 2000 mm by setup review |
| Inspection | Dimensional inspection, FAI, material certificate, surface treatment report by order requirement |
| Application | Hydraulic valve blocks, heavy-duty brackets, flanges, shafts, chassis support parts |
| Key Features | Large-size heavy-load parts, shaft and flange routing, rough-to-finish flow, rust-protection packing |
| Critical QC Requirements | Material certificate, heat treatment or surface report, key dimension sampling, packing protection |
| Batch Range | 1 piece MOQ to repeat production batches by schedule review |
| MOQ | 1 Piece |
| Typical Lead Time | 10-15 business days after drawing review |
| Drawing Formats | STEP, IGS, DWG, PDF, X_T |
| Heat Treatment | By drawing review |
Applications
Hydraulic Valve Blocks and Flange Connectors for Batch Supply
Typical Parts: Hydraulic valve block, flange connector
Carbon steel works well for heavy-load connections and bore-pattern machining in hydraulic systems, and repeat supply benefits from locking the grade, heat treatment, and rust-protection flow after the first article is approved. Material certificates, FAI, and surface-treatment reports can all be supplied by order.
Brackets and Pin Shafts for Construction Machinery
Typical Parts: Construction machinery bracket, pin shaft
Construction machinery parts often need to balance load capacity, rough-to-finish process flow, and transport protection. Carbon steel is a practical batch-supply material, and heavy-part deliveries can be scheduled together with heat treatment or plating while carton, foam, or wooden-case packaging is selected to the order requirement.
Repeat Orders for Shafts and Flanges in General Machinery
Typical Parts: Shaft part, flange part
Repeat shaft and flange orders depend on stable material supply, predictable fixturing, and a clean report interface. Carbon steel makes it easier to hold a repeatable route, and longer shafts or larger plates can be checked against the 3000 x 1600 x 1400 mm milling range and diameter 1250 x length 2000 mm turning range before scheduling.
Chassis Supports and Structural Connectors for Automotive Supply
Typical Parts: Chassis support part, structural connector
Automotive support structures often need grade selection, surface protection, and batch packaging to be defined together, and carbon steel can balance cost with load-bearing needs. The final application requirement still depends on the customer drawing, service condition, and industry rules before the heat-treatment or surface-treatment route is released.
Why Choose Us
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, which keeps both small precision parts and large structures inside one factory flow.
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.
Repeat-Order Batch Control and File Coordination
After the first article is approved, grade selection, heat treatment, and rust-protection routes can be locked for repeat carbon steel orders. Material certificates, dimensional reports, and surface-treatment reports can be bundled by order so export files and quality records stay aligned from batch to batch.
Export Logistics and Rust-Protection Packaging in One Flow
Carbon steel brackets, shafts, and flanges need both impact protection and rust protection during long-distance transport. Foam, separators, cartons, or wooden cases are selected according to weight, structure, and shipping method. DHL, FedEx, UPS, and sea freight can be supported, while payment can use T/T, PayPal, or Western Union.
FAQ
What carbon steel material certificates can your factory provide?
Material certificates can be supplied according to the order requirement, and the exact type depends on the grade and purchase lot for 45#, Q235, 1045, or 40Cr. If heat-treatment or surface-treatment reports are also required, their format and coverage should be defined before ordering.
What is the MOQ for carbon steel CNC machined parts from China?
MOQ starts from 1 piece, which suits samples, small lots, and repeat-order transition. Standard batch lead time is often reviewed in the 10-15 day range, but actual price and timing still depend on grade, heat treatment, rust protection, and scheduling.
Can you coordinate heat treatment and anti-rust finishing within your factory workflow?
Yes. Heat treatment, rust prevention, and later finish machining can be scheduled in one controlled sequence. For quench-and-temper, black-oxide, or zinc-plated parts, the process order and between-step protection are usually confirmed before the batch is released.
What payment methods and shipping options do you support?
Payment can be arranged by T/T, PayPal, or Western Union. Shipping can use DHL, FedEx, UPS, or sea freight, and packaging can use foam, cartons, or wooden cases according to part weight and transport distance.
How do you package heavy carbon steel shafts, flanges, or brackets for export?
Heavy carbon steel products can use rust-preventive oil, separators, foam, cartons, or wooden cases according to structure and shipping method. The main goals are impact protection, rust prevention, and keeping different batches from being mixed during export handling.
Can your factory machine larger carbon steel plates or shafts?
Yes. Medium and large carbon steel plates and shafts can be reviewed against milling travel up to 3000 x 1600 x 1400 mm and turning capacity up to diameter 1250 x length 2000 mm. The actual machinable size still depends on blank condition, fixturing method, and later process planning.
Request a CNC Machining Quote from XCM CNC
Send us your drawings. Our team will review the file and reply with a machining quote. MOQ: 1 piece, with competitive low-cost pricing.
Email: [email protected] | WhatsApp: +8618638951317
