Precision CNC Threaded Bushing

A precision CNC threaded bushing is a cylindrical sleeve with precision-machined threads on its internal or external surface. Think of it as a "threaded insert" that gives a component a strong, replaceable thread interface without machining threads directly into the parent part. When a threaded hole strips in a soft aluminum housing — a classic failure mode — the bushing is the part that saves the day.

There are two main families: threaded inserts and sleeve bushings. Both demand the same thing from the machine shop: roundness, concentricity, and thread accuracy measured in microns.

Materials & Thread Configurations

Stainless steel (SUS303/304/316): corrosion resistance for food, marine, and medical use.

Alloy steel (4140/1045): high strength with heat treatment for heavy load applications.

Brass (C3604/HPb59-1): excellent machinability and natural lubricity for bearing precision CNC threaded bushings.

Aluminum (6061-T6/7075): lightweight for aerospace and automotive assemblies.

Thread forms: metric (M3–M64), UNC/UNF, NPT pipe threads, and custom forms per drawing.

Classes: 6H/6g standard, 5H/4h precision classes for interference-fit applications.

The thread is cut with single-point threading or thread milling on CNC lathes, followed by pitch-diameter gauging. For press-fit inserts, we hold the outside diameter to ±0.005mm so the bushing seats with the correct interference — loose enough to install, tight enough never to spin.

Product Specifications

Typical Applications of Precision CNC Threaded Bushing

As a precision CNC threaded bushing manufacturer and supplier, Tuoyuan Metal supplies bushings in bulk at factory-direct pricing for:

Threaded inserts for aluminum and plastic housings in automotive and electronics.

Bearing sleeves and wear bushings in pumps, gearboxes, and conveyors.

Locating bushings for jigs, fixtures, and tooling plates.

Hydraulic and pneumatic cylinder components.

Furniture, appliance, and equipment pivot assemblies.

Aerospace and defense lightweight assemblies.

Real Case

Case Study: Custom Precision CNC Threaded Brass Bushings

Industry: Electronics & Electrical Equipment

Material: Brass C36000

Process: Swiss CNC Turning, Tapping & Hex Milling

An American electronic component manufacturer needed custom precision CNC threaded bushings to serve as anti-rotational inserts within plastic enclosures. The parts required burr-free finish to ensure effortless screw assembly without damaging the plastic housing. Utilizing multi-axis Swiss CNC lathes, we machined the brass bushings with clean threads and precise hex heads in a single setup. A thorough ultrasonic cleaning process was implemented to remove all metal shavings, followed by 100% thread optical inspection.

Production Process

Every bushing starts with an engineering review: our team analyzes your 2D/3D drawing or sample, selects the material grade, and programs optimal toolpaths. For threaded inserts, the critical parameter is the interference fit — we calculate the exact OD to guarantee retention without over-stressing the host part.

Machining runs on high-speed automatic CNC lathes with bar feeders. Turning, facing, grooving, boring, and threading are completed in one clamping cycle where possible — this single-setup approach is what keeps concentricity in the micron range.

Threading is followed by 100% inspection: thread plug/ring gauging, optical sorting, and CMM verification on sampled parts. Surface treatment (zinc, black oxide, nickel) is applied in our in-house lines before final packing.

Why Choose Tuoyuan Metal

A Decade of Precision Machining Tuoyuan Metal has over 10 years of experience in precision turned parts and CNC machined components, serving customers in 20+ countries with a 95% repeat purchase rate. When you order bushings from us, you are working with a shop that has already solved your problem — many times.

Bushings are packed in anti-rust paper, poly bags, and export cartons or wooden cases per order size. Small lots ship by express (DHL/FedEx/UPS); bulk orders ship by sea from Qingdao Port (FCL/LCL) or air freight. Documentation: Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificate. For precision CNC threaded bushing prices, bulk orders, or a quotation, contact our export team.

FAQ

Q1: Can you machine bushings from my drawing or sample? 

A1: Yes. Send us a 2D/3D drawing (PDF, AI) or a physical sample. We review the design, confirm material and tolerances, and make pre-production samples for your approval before mass production.

Q2: What tolerance can you hold on threads? 

A2: Standard thread classes 6H/6g per ISO 965. For precision applications, we can hold 5H/4h with pitch diameter verified by calibrated gauges. Tell us your class requirement.

Q3: How do you guarantee quality on large orders? 

A3: First-article inspection with a full report, then in-process gauging and 100% optical sorting on final dimensions. We also support third-party inspection before shipment.

Q4: Can you produce these precision CNC threaded bushings to custom sizes and non-standard thread pitches?

A4: Yes, we fully customize the outer diameter, length, wall thickness, and thread specs according to your engineering drawings or sample parts.

Q5: Can I request samples before placing a mass production order?

A5: Absolutely. We can provide prototype/pre-production samples for your functional testing and assembly validation before proceeding to full-scale manufacturing.