ISO 9001 & IATF 16949 CERTIFIED

Precision Screw Machine Parts | Swiss Screw Machining Services From Our Factory

For overseas buyers, outsourcing screw machine parts often brings hidden markups and quality risks. As a family-owned CNC factory operating Swiss-type lathes – discover our complete Swiss machining services – we eliminate intermediaries; all programming, turning, and CMM inspection stay in-house. This vertical control delivers high-precision small-diameter components at 0.005 mm tolerances, cutting lead times by 30% and unit costs by 15-20%.

About Yueyi Precision

Why Small-Diameter Parts Require Swiss Screw Machining Instead of Conventional Turning

Our typical machining accuracy reaches 0.005 mm, with length tolerances of ±0.001″ and standard surface finishes of Ra 0.8–1.6 μm. Learn more about our tolerance standards

Conventional CNC turning can cause deflection when machining long, small-diameter components. Swiss screw machining overcomes this with guide bushing support, enabling producing high precision parts with length-to-diameter ratios exceeding 10:1. Our state-of-the-art Star Swiss lathes complete turning, milling, drilling, and threading in one setup, achieving tolerances to 0.005 mm. Learn more about our tolerance standards.

Key capabilities of our Swiss screw machining:

Parameter Range / Capability
Diameter capacity 0.5 mm – 32 mm (0.020” – 1.260”)
Part length (single setup) Up to 300 mm (12”)
Live tooling stations Up to 8 stations, axial/radial
Secondary spindle Yes, for back-work (cross-holes, threading)
Tolerance standard 0.005 mm (±0.0002”)
Surface finish standard Ra 0.8 – 1.6 μm (32 – 63 μin)
Cycle time (typical) 15 seconds – 5 minutes per part
Batch size 50 – 1,000,000+
Small precision aluminum screw machine parts, CNC turned miniature locating studs with smooth surface finish for precision equipment assembly.
Custom brass screw machine parts, precision turned hydraulic hose fittings with knurled surfaces for leak-proof fluid connection applications.
Custom machined brass screw machine parts, assorted threaded studs, spacers and knurled bolts for mechanical fastening and mounting assemblies.

We manufacture custom brass threaded studs, spacers, knurled fasteners, and other screw machine products for mechanical fastening, fluid control, and precision assembly applications.Automated bar feeders support continuous lights-out production for high-volume manufacturing. Every production batch is monitored through in-process probing and fully traceable by job number, material lot, and inspection record to ensure consistent process control from prototype approval to mass production. To explore complementary machining capabilities for larger rotational components, discover our CNC Turning Services

Material Versatility – Brass, Stainless, Aluminum & More

Material selection for Swiss-type automatic lathes directly impacts cycle times, tool life, and the ability to maintain strict 0.005 mm tolerances on small-diameter components. While the guide bushing system greatly reduces workpiece deflection, each alloy’s unique machinability governs chip formation, surface finish quality and dimensional stability during high-volume lights-out production. We stock full ranges of standard wrought bar stock to meet varying demands for mechanical strength, thermal conductivity and corrosion resistance across automotive, medical and electronic industries.

Brass screw machine parts

We machine C36000 free-cutting brass for fast, low-wear Swiss turning of hydraulic fittings and electrical terminals with natural anti-corrosion performance. Most pieces skip extra plating. View our brass CNC machining page to check full alloy performance data.

Stainless screw machine parts

303, 316L and 17-4PH stainless grades run on our sliding head machines. Custom coated tools offset work-hardening to deliver clean threads for marine and high-load pins. Browse our stainless steel machining service for grade-by-grade comparisons.

Aluminum screw machine parts

6061 and 7075 aluminum fit lightweight, heat-conductive sensor and RF housing components with high Swiss machining throughput. We supply matched anodizing finishes. Visit our aluminum CNC machining hub for material and finishing guides.

Material comparison table:

Material Key Properties Typical Applications Machinability Rating
Brass C360 Excellent corrosion resistance, good conductivity, bright finish Water meters, air valves, electrical connectors 100% (baseline)
Stainless 303/304 High strength, good corrosion resistance, non-magnetic Sensor housings, marine hardware, industrial couplings 60-70%
Stainless 316L Superior chemical & salt-water resistance Chemical injection fittings, medical components 50-60%
Aluminum 6061 Lightweight, good anodizing response, low cost Electronic enclosures, hydraulic manifolds 150-200%
Aluminum 7075 High strength High-load automotive brackets, robotics arms 100-120%
Steel 12L14 Free-cutting, cost-effective Shafts, spacers, fasteners 80-90%

After machining, we can coordinate certified secondary processes including passivation, zinc plating, and black oxide. Material certificates remain fully traceable and are supplied with each shipment when required.

Automotive Swiss Screw Machine Parts – Built for Long-Term Reliability

Automotive hardware demands strict dimensional repeatability, burr-free threads and stable performance amid vibration, temperature swings and corrosive conditions. Our Swiss screw machining fabricates ultra-precise batch parts for fuel systems, brake assemblies, steering units, transmission valves and EV sensor housings with consistent quality. Learn more about our automotive CNC machining solutions.

Examples of Typical Automotive Swiss Machined Components

Fuel injector nozzles

stainless 303, micron-level precision orifice

Brake bleed screws

brass C36000, 10-micron sealing surface finish

ABS sensor rings

stainless 316L, concentricity less than 0.01 mm

Threaded studs and spacers

aluminum 6061 / free-cutting steel 12L14

We serve Tier-1 auto suppliers and aftermarket manufacturers with complete PPAP Level 3 packages, covering control plans, process capability studies and full dimensional inspection reports. Kanban stock management and JIT shipment stabilize your production lines and cut warehousing expenses. Send us your CAD drawings for a free DFM review and competitive quotation.

What Makes Us Different – Factory Direct, Quality Driven

Supplier consistency is often determined by process control rather than machining alone. When heat treatment, surface finishing, or inspection are outsourced to multiple vendors, lead times and dimensional consistency can become difficult to manage. By keeping production and quality management under one coordinated workflow, we provide better traceability, faster communication, and more predictable delivery. Learn more about our quality control process

Manufacturing Capacity & Technical Resources

17 years of experience in precision screw machining

50+ engineers and technical staff

12 Swiss CNC lathes (Japanese Star and Swiss-type machines)

4 additional conventional CNC lathes for larger diameters

CMM inspection

2 optical sorters for high-volume automated inspection

ISO 9001:2015 certified since 2012

Automated bar feeders for continuous lights-out production

Process Quality & Inspection System

First-article inspection with full dimensional reporting

In-process sampling every 200 pieces or per AQL requirement

Final CMM inspection for critical dimensions with 0.005 mm resolution

Material certificate available upon request

Pricing & lead time – direct buying cuts cost: Per-piece pricing 15–20% below trading companies. Standard lead time 3–4 weeks; expedite 1–2 weeks for repeat orders.

No hidden fees – our quote includes: programming & setup (one-time per part number), standard tooling (most absorbed), first-article inspection report (free), and packaging. No surcharges.

high-precision-screw-machine-parts-various-threaded-fasteners
multi-material-screw-machine-parts-brass-stainless-steel-assortment

Start Your Swiss Screw Machining Project with Engineering Validation

In precision manufacturing, early-stage manufacturability evaluation is often more critical than final pricing. Small design decisions—such as wall thickness, thread geometry, or tolerance selection—can significantly impact machining stability, production cost, and long-term consistency in high-volume manufacturing.

To reduce downstream manufacturing risk, we begin every project with a structured engineering review based on your drawings or existing parts.

Review manufacturability within 24 hours

Suggest material and tolerance optimizations – down to 0.005 mm if needed

Provide a fixed price with lineitem breakdown

Deliver first articles as fast as 5 business days

Engineering Review Process (24 Hours)

Evaluate manufacturability for Swiss machining processes

Identify potential design risks affecting precision or stability

Suggest material alternatives and tolerance optimization down to 0.005 mm capability where applicable

Provide a structured manufacturing approach based on production efficiency

To better understand our machining precision across different production requirements, you can review our surface finish capabilities

Ready for a quote? 

People Also Ask

Q: What are screw machine parts?

A：Small precision components from automatic lathes. Pins, valves, threaded inserts. We make screw machine parts in brass, stainless, aluminum – complete in one setup.

A: Head, shank, threads, pitch, tip. For custom screw machine parts, we control all these features on Swiss CNC lathes.

A: Pan head, flat head, socket head, button head, set screws. We supply stainless screw machine parts, brass screw machine parts, and aluminum screw machine parts in all these types.

A: Wood screw, machine screw, selftapping screw, set screw, shoulder screw, eye screw, thumb screw, captive screw, concrete screw, micro screw. All as CNC Screw Machined Parts.

A: #4 screw has 0.112″ diameter, common in electronics. Our Swiss machining produces precision screw machine parts down to #0 with full thread inspection.

Ready to start Your next project?

Contact our technical experts today for a customized solution and a tailored quotation.

Upload your CAD files to get an instant quote

Uploading weapons or parts subject to export control regulations such as ITAR, EARbeyond EAR99, or EU Dual Use is a violation of our terms of use.

Our expert team will contact you within 24 hours

to provide a free technical evaluation and solution design, helping you upgrade your production process.

ADDRESS

NO.22,You Yi Road ,Wulian Community, LongCheng Street ,Long gang District ,Shen Zhen

Email

icey@yueyiprecision.com