China Precision Screw Machining Parts Manufacturers Suppliers Factory - Customized Service

Product Overview

Custom-engineered turned components produced via multi-axis CNC Swiss-type lathes and automatic screw machines. Designed for high-volume, tight-tolerance industrial assemblies requiring complex outer diameters, internal bores, and precise thread forms. Built strictly to OEM engineering drawings with zero-defect compliance for global manufacturing supply chains.

Precision Threaded Connectors
High-tolerance threaded metal connectors engineered for fluid power transfer under dynamic pressure surges. CNC-turned from cold-drawn bar stock or forged blanks, featuring roll-formed threads for
Precision Threaded Pins
Ground alloy or stainless steel pins featuring integrated external/internal threads for positive location, axial retention, or extraction force application. Machined from bar stock, centerless
Precision Lead Screw Nuts
Precision-machined nuts matched to trapezoidal or ACME lead screws. Two architectural options: Zero-Backlash (axial spring-loaded dual-nut) for bidirectional positioning repeatability (< ±5 µm), and
Precision Threaded Fittings
CNC-turned metal threaded components engineered for leak-free static and dynamic sealing in industrial fluid and gas circuits. Produced from bar stock via multi-axis CNC turning centers, eliminating
Precision Threaded Sleeves
Precision-machined metal sleeves featuring tight-tolerance internal and/or internal-external concentric threads. Engineered for high-load mechanical interfaces, threaded insert reinforcement, and
Precision Threaded Shafts
Precision Threaded Shafts combine tight-tolerance journal/bearing diameters with rolled, cut, or whirled thread profiles. Engineered for axial translation, multi-point load transfer, or fine

Technical Specifications

Parameter	Standard Capability	Extended Capability
Diameter Range	[ 1.0 mm - [ 45.0 mm	Up to [ 200 mm (via turning centers)
Length Capacity	Up to 300 mm	Custom deep-bore configuration
Dimensional Tolerance	+/- 0.01 mm	+/- 0.005 mm (process-dependent)
Thread Standards	Metric (M), Unified (UN/UNF), BSP/NPT	Special pitch and multi-start threads
Surface Roughness	Ra 0.8 um	Ra 0.2 um (via burnishing/finishing)
Batch Flexibility	500 pcs to 500,000+ pcs	Rapid prototyping (MOQ 50 pcs)

Common Material Grades

Stainless Steel	AISI 303, 304, 316, 416, 17-4PH
Brass & Copper	C36000 (Free-Cutting Brass), C11000 Copper
Aluminium Alloys	AL6061-T6, AL7075-T6, AL2024
Carbon & Alloy Steels	12L14, 1018, 4140, 8620
Engineering Plastics	POM (Delrin), PTFE, PEEK, Nylon

Key Features

01.

Simultaneous Turning and Milling

Multi-axis live tooling eliminates secondary setups, reducing cumulative tolerance stacking for off-center holes, flats, and cross-slots.

02.

Sub-Spindle Capability

Complete backside machining in a single clamping operation, ensuring concentricity between front and rear features.

03.

Burr-Free Edge Control

Integrated mechanical and chemical deburring protocols maintain clean internal channels and thread entry points.

04.

Traceability per Lot

Heat number tracking from raw material mill certificate to final shipping pallet.

Applications

Automotive Subsystems

Common rail fuel system fittings, ABS sensor housings, turbocharger valve pins, and actuator bushings.

Medical Devices

Orthopedic instrument connectors, surgical stapler components, and diagnostic fluidic fittings.

Industrial Automation

Pneumatic spool valves, proportional valve cores, encoder shafts, and micro-actuator pins.

Electronics & Telecommunications

RF coaxial connector pins, grounding terminals, micro-standoffs, and housing fasteners.

Customization Options

Geometric Adjustments: Custom head styles, knurled grips, internal/external relief grooves, and cross-drilled holes based on 2D/3D CAD models (STEP, IGES, PDF).

Surface Treatments:
Passivation (ASTM A967) for stainless steel.
Anodizing (Type II / Type III Hardcoat) for aluminum.
Electroplating (Zinc, Nickel, Gold, Silver, Tin) for corrosion resistance and conductivity.
Heat Treatment (Carburizing, Induction Hardening, Vacuum Quenching) for wear resistance.

Packaging Solutions: Custom anti-corrosion VCI packaging, tape-and-reel packaging for automated pick-and-place assembly, or partitioned blister packs.

Quality Control & Inspection

Strict adherence to ISO 9001 and IATF 16949 quality management standards. Every production lot undergoes the following verification gates:

Incoming Material Verification: Spectrometric chemical composition analysis and mechanical tensile testing prior to releasing raw material to the shop floor.

In-Process Inspection: Operator patrols conduct first-article inspection (FAI) and dimensional checks every 2 hours using micrometer, thread gauges, and dial indicators.

Final Optical & Contact Measurement: Fully equipped metrology laboratory featuring:
Keyence Optical Comparator / Image Dimension Measurement Systems for rapid 2D profile verification.
CMM (Coordinate Measuring Machine) for complex GD&T evaluation.
Digital height gauges and pin gauge sets for tight bore verification.

Documentation Support: PPAP (Production Part Approval Process) Level 1 to Level 3, ISIR (Initial Sample Inspection Report), Material Test Reports (MTR), and RoHS/REACH compliance declarations available upon request.

Production & Delivery

Manufacturing Infrastructure: Equipped with 45+ CNC Swiss-type sliding headstock lathes and fixed headstock turning centers featuring IEMCA automatic bar feeders.

Capacity: Over 2 million precision parts produced monthly across 2 shifts.

Lead Times:
• Prototyping & Sampling: 7 to 12 business days.
• Volume Production: 3 to 5 weeks (contingent on volume, material availability, and secondary plating requirements).

Logistics: Strategic partnerships with global freight forwarders (DHL, FedEx, UPS for air express; FOB/CIF sea freight for bulk shipments) ensuring secure delivery to North American and European ports.

FAQ

Q: What file formats do you accept for engineering evaluation?

A: We accept 3D models in STEP, IGES, Parasolid, and SolidWorks formats, accompanied by a 2D PDF drawing containing critical dimensions, surface finish requirements, and GD&T tolerancing.

Q: How do you handle material certification for aerospace or medical applications?

A: Every shipment includes original Mill Test Certificates (MTC) linking the physical parts directly to the raw material heat number. Third-party lab testing (SGS, TÜV) can be arranged prior to dispatch.

Q: What is your standard procedure if a non-conformance is identified?

A: We execute an 8D corrective action report within 48 hours of notification, detailing root-cause analysis, containment actions, and preventive measures, accompanied by prompt sorting and replacement arrangements.

Q: Can you sign an NDA before we share our proprietary drawings?

A: Yes. We routinely execute Mutual Non-Disclosure Agreements (NDAs) to protect your intellectual property before reviewing application details.

Request a Quote

Submit your technical drawings and volume requirements to initiate a formal engineering review and quotation.
Required Data for Fast Response:
2D drawing (PDF with tolerances) and 3D CAD file.
Exact material grade and finish specification.
Annual volume, target batch sizes, and required delivery schedule.

We are one of the most experienced precision screw machining parts manufacturers and suppliers in China, specialized in providing high quality customized products for global clients. We warmly welcome you to buy high-grade precision screw machining parts at competitive price from our factory.

Precision Screw Machining Parts