Precision Machining for Spacers, Bushings, and Turned Components
Manufacture installation-ready components strictly to print with tight concentricity, precise length tolerances, and burr-free edges across every batch.
±0.01 mm
Turning tolerance capability
24 hours
Quote turnaround after review
10,000+
Production unit runs supported
Built for OEMs
Machined from drawings for machinery, robotics, and industrial equipment.
Ready for assembly
Deburred, inspected, finished, and securely packaged for integration.
Why accuracy matters
Eliminate assembly errors at the component level
Dimensional variation in a spacer, sleeve, or bushing can create stack-up errors, bearing misalignment, and costly assembly delays. Precision machining controls the relationship between ID, OD, length, and perpendicularity so parts slide or press fit without manual adjustment.
Concentricity
Uniform wall thickness preserves axial alignment and distributes load across bearings and shafts.
Square end faces
Accurate face turning and grinding reduce bending moments and joint strain when fasteners are tightened.
Clean edges
Deburring, reaming, and chamfering protect mating shafts and support reliable press-fit assembly.
Manufacturing capabilities
From prototype parts to repeat production
Our Shenzhen facility combines multi-axis CNC turning centers, CNC milling equipment, and precision grinding setups to cut, bore, thread, and profile parts to your print.
CNC Turning & Lathe Operations
Cylindrical partsConfigured for close-tolerance ODs, IDs, multi-step features, and precision cylindrical components.
- ●Spacers, sleeves, bushings, pins, shafts, standoffs, and shoulder washers
- ●Internal and external grooves, step diameters, chamfers, tapers, and threads
- ●Cross-drilled holes, keyways, side flats, and counterbores
CNC Milling & Complex Profiles
Profiled partsDesigned for non-cylindrical parts, mounting blocks, and spacers with offset features.
- ●Flanged spacers, mounting brackets, slotted blocks, and multi-hole plates
- ●Deep pockets, counterbored holes, tapped patterns, and lightened pockets
- ●Standard or custom slot profiles with consistent repeatability
Technical specification matrix
Capabilities matched to your drawing
Both machining routes support prototypes, pilot runs, and repeat orders. Final capability depends on geometry, material, tolerance, and print requirements.
| Parameter | CNC Turning | CNC Milling |
|---|---|---|
| Typical components | Spacers, sleeves, bushings, shafts, pins, standoffs | Brackets, blocks, flanged plates, complex spacers |
| Materials | Aluminum, stainless steel, carbon steel, brass, copper, plastics | Aluminum, stainless steel, carbon steel, brass, plastics |
| Size range | Outer diameters from 2 mm to 300 mm | Work envelope up to 600 mm × 500 mm × 400 mm |
| Achievable tolerances | Down to ±0.01 mm according to print specifications | Down to ±0.015 mm according to print specifications |
| Surface finish | Ra 0.8 µm to Ra 3.2 µm standard; lower with grinding | Ra 1.6 µm to Ra 3.2 µm standard |
| Production scale | 1-piece prototypes, 100-piece pilots, 10,000+ units | Prototype to repeat medium-volume runs |
Complete component finishing
Parts that arrive ready for line integration
Secondary processing is handled in-house or through qualified specialized partners to meet surface roughness, wear resistance, corrosion prevention, and identification requirements.
Precision grinding
For finishes finer than Ra 0.8 µm or exact diameters for press-fit bearing applications.
Anodizing and passivation
Clear, black, or hardcoat anodizing for aluminum; passivation for 304 and 316 stainless steel.
Plating and black oxide
Zinc, nickel, and black oxide treatments protect steel parts while respecting critical dimensions.
Laser marking
Add part numbers, batch codes, or logos for traceability and inventory control.
Material guidance
Select the material for the load, environment, and application
Material selection balances weight, mechanical strength, corrosion exposure, friction, and electrical conductivity.
Aluminum 6061-T6 / 7075-T6
Lightweight, strong for its weight, and easy to anodize.
Robotics · enclosures · optics
Stainless Steel 304 / 316
Corrosion resistant with high tensile strength and biocompatible options.
Medical · food · marine
Carbon / Alloy Steel
Cost-effective strength for structural loads and heat treatment.
Machinery · automotive · equipment
Brass C36000 / Copper
Low friction, corrosion resistance, and excellent conductivity.
Connectors · fittings · bearings
POM / PEEK / Nylon
Lightweight, non-conductive, chemically resistant, and self-lubricating options.
Isolation · chemical · guides
Robotics & automation
Aluminum 6061 spacers reduce inertia while maintaining structural rigidity.
Heavy industrial OEMs
Hardened steel or thick-walled stainless sleeves withstand compressive clamping forces.
Electronics & instrumentation
Threaded brass or aluminum standoffs provide stable stack heights in compact enclosures.
Quality assurance
Verified against your CAD model and drawing notes
Our quality team checks dimensional accuracy at critical steps throughout the manufacturing run.
01 · Raw material
Certificate check
Material certificates are verified and supplied upon request to confirm alloy composition.
02 · In process
Sampling control
Calipers, micrometers, bore gages, and thread plug gages monitor critical dimensions.
03 · Final release
CMM inspection
Full dimensional checks confirm compliance before parts are deburred, protected, and packed.
Dimensional compliance
Parts measured against drawing dimensions and tolerances.
Edge conditioning
Parts deburred and chamfered according to drawing callouts.
Safe packaging
Segregated trays or individual wrapping protect finishes and threads in transit.
Request a fast quote
Submit your drawing and keep your project moving
Send your engineering files and project specifications to receive a clear quotation based directly on your prints. Our engineering team reviews manufacturability and provides a competitive quote within 24 hours of drawing review.
What to include
- 1. 2D PDF with explicit tolerances and notes, plus a 3D STEP, IGES, or X_T file
- 2. Material requirement such as Aluminum 6061-T6 or SS304
- 3. Prototype quantity, trial-run volume, or annual repeat production requirement
- 4. Surface treatment, anodizing type, plating color, or roughness target
Fast-track machining is available for emergency replacement parts and rapid prototyping.
Start your RFQ
Share your requirements through the inquiry channel below.
Prefer email?
sales@spacermfg.comInclude your drawings, material, quantity, finishing requirements, and target delivery date for the fastest response.
Need installation-ready precision components?
Move from drawing review to production with a machining partner built for demanding OEM work.