Precision Bushings and Sleeves, Machined to Fit
A bushing is defined by two numbers: the bore that carries the shaft and the outside diameter that seats in the housing. Get either wrong and you get play, heat or a seized assembly — which is why every dimension here is measured, not assumed.
Why equipment manufacturers choose us
Fits under control
Bore and OD machined to your fit class — clearance, transition or press — with concentricity verified.
Wear-aware material choice
Bronze, stainless, hardened steel or engineering plastics (PEEK, PTFE) selected for the duty cycle.
Measured, documented
Zeiss CMM dimensional reports per batch, so receiving inspection is a formality.
Precision Bushings
Real capability windows — verified in-house, not estimated.
| Capability | Specification |
|---|---|
| Typical parts | Bushings · sleeves · spacers · wear rings · spacer tubes |
| Diameter range | Small diameters from Ø 0.5 mm (Swiss-type) to Ø 65 mm turning |
| Typical tolerance | ±0.005 mm typical where applicable · ±0.01 mm standard |
| Surface finish | Down to Ra 0.2 µm |
| Materials | Bronze · stainless · alloy steel · PEEK · PTFE |
| Inspection | Zeiss CMM bore, OD and concentricity verification |
| Prototype lead time | Typically 5–10 working days |
Materials we machine
From Drawing to Delivered Part
A transparent, engineering-led process built for long-term supply programs — not one-off transactions.
Submit & Review
Send drawings and program context. Our engineers run a DFM review and flag tolerances, materials and risk before any cutting begins.
Quote & Material Plan
You receive a transparent quote plus a material-verification plan — grade, EN/DIN check and certificate strategy for your application.
Machine & Inspect
In-house precision machining, then Zeiss CMM dimensional inspection and spectrometer material verification on critical batches.
Deliver & Support
Kitted, ESD-safe or ISO Class 7 cleanroom packaging, with local engineering and after-sales support through our German partner.
Micro and fine-feature precision work
Below are examples of this kind of work held to our standard tolerance and finish. Dimensions, drawings and material certificates are available on request.
Frequently asked questions
Request a Quote
Tell us about your program. The fields below help our engineering team prioritize recurring, long-term supply programs with equipment manufacturers.
What happens after you send your files
- Within 1 business day an engineer — not a salesperson — reviews your drawings and replies.
- DFM review: tolerances, material and risk flags, before any cutting begins.
- Your quote includes a material-verification plan: grade, EN/DIN check, certificate strategy.
Critical features are verified in house · material chemistry confirmed by spectrometer · EN 10204 3.1 certificates available.
Prefer email? Write to us directly at info@prototech-machining.com
Our form captures production type, annual quantity and project status up front — so we can focus engineering resources on long-term supply relationships, not one-off inquiries.
Talk to our team about special materials, tolerances or a failed-supplier recovery before you send drawings.