Custom Precision Stainless Steel CNC Turned Parts

Multiple outside diameters, bores, end faces and annular grooves on pump shafts, sleeves and threaded fittings can be machined together during CNC turning. Based in Shenzhen, XCM CNC controls mating dimensions at bearing seats, sealing features and connections against drawings. Coaxiality across multiple outside diameters can reach 0.012 mm, with h6/H7 shaft/bore fits supported. The factory uses equipment including a Shenyang CK61125X2000 CNC lathe, with maximum turning diameter 1250 mm and length 2000 mm. It is certified to ISO 9001, ISO 13485, IATF 16949 and GJB9001C. Orders start at 1 piece, with standard lead times of 10-15 days depending on part complexity and quantity.

Stainless Steel Pump Shaft Coaxiality, Runout and Bearing Fit Inspection

Multiple outside diameters on stainless steel pump shafts can achieve coaxiality of 0.012 mm and circular runout of 0.012 mm, with shaft diameters machined to h6 or h7. Bearing seats, sealing features and locating end faces are controlled by section against drawing datums, with shaft diameter tolerance of +/-0.01 mm. Coaxiality and runout are inspected with a Hexagon Inspector Classic 06.08.06 CMM. Height and length dimensions are cross-checked with a TRIMOS 600L height gauge.

Stainless Steel Long Shaft Straightness, Support and L/D 15:1 Capability

Slender shafts can reach a length-to-diameter ratio of 15:1 and maximum turning length of 2000 mm. When the ratio exceeds the normal range, steady-rest and follow-rest support locations and machining sequence require evaluation to avoid chatter and bending deformation. Straightness can reach 0.01 mm / 1030 mm. Tolerances for each mating section and straightness requirements are agreed together with the support plan.

Stainless Steel Sleeve Bore Roundness, Coaxiality and Surface Grading

Sleeve bores can achieve roundness of 0.006 mm and internal-to-external diameter coaxiality of 0.012 mm. Turned outside diameters achieve Ra 0.8 um and bored holes Ra 1.6 um. Where bores require Ra 0.8 um, honing can be evaluated according to bore diameter and length. Internal and external mating dimensions and roughness are inspected separately with a CMM and roughness tester.

Stainless Steel Threaded Fittings with Pipe Threads, Grooves and GO/NO-GO Gauging

Threaded fittings can include NPT, BSP, G and PT pipe threads, locating end faces and annular grooves. Threads are turned to the specified standard and effective thread depth, then inspected with matching go/no-go or ring gauges. Minimum general turned groove width is 0.5 mm. Minimum O-ring groove width is 1.0 mm, with groove-depth tolerance of 0.01 mm. Grade selection depends on the contact medium and corrosion-resistance requirements. The free-machining properties of 303 improve turning efficiency, but its corrosion resistance is lower than that of 304 and 316L, requiring an application-based tradeoff.

Quality Systems for Shaft, Sleeve and Fitting Procurement

We have ISO 9001, ISO 13485, IATF 16949 and GJB9001C quality systems, with equipment from DMG, Mazak, Matsuura, Brother and other manufacturers. Stainless steel shafts, sleeves and fittings can be produced and dimensionally inspected against specified drawings.

Supporting Operations from Small Connectors to Large Rotational Parts

The factory’s machining range covers small connectors through large structural parts. Turning can be coordinated with grinding and other necessary secondary operations to meet different shaft diameter, bore and sealing feature requirements. Passivation and polishing can be arranged for corrosion-resistance and surface requirements, delivering parts in the required material condition and surface quality.

Tiered Equipment Strategy for Low-Cost CNC Machining, Quality-Assured Production

XCM CNC operates four tiers of CNC equipment from mainland China, Taiwan, Japan, and Europe and North America. Lower-tolerance operations such as general outside diameters and non-critical end faces use mainland Chinese or Taiwanese equipment. High-precision bearing seats, sealing features and mating threads use imported machines such as DMG and Mazak. Equipment is matched to each part’s actual accuracy requirements, reserving machines with higher hourly costs for demanding operations and reducing machining costs while meeting drawing requirements.

Packaging Protection for Mating Diameters and Threads

Packaging protection can be specified separately for shaft mating surfaces, polished visible surfaces and threads. Packaging uses foam and cartons, with wooden crates for large or heavy parts. Mating outside diameters and finish-machined threads use protective sleeves or separating wraps to reduce transit damage to assembly features. Shipping options include DHL, FedEx, UPS and sea freight.

Material Traceability and NDAs on Request

Material certificates can be supplied according to the order, recording the specified grade, heat number and delivered condition so material sources are traceable for each batch. CMM reports and FAI first article reports record shaft diameters, coaxiality and runout. An NDA can be signed before design information is submitted when drawing confidentiality is required.