🛠️ Precision Spacers, Sleeves & Bushings

We hold ±0.005mm on ID and OD for precision-ground bushings, and ±0.02mm turned-and-bored bushings. Concentricity between ID and OD is held within 0.01mm TIR. For production quantities, we use SPC-controlled processes to maintain Cpk ≥ 1.67 on critical dimensions.

Our standard bushing materials include: 1018/1215 steel (general purpose), 4140/4150 chrome-moly (high-strength), 316 stainless steel (corrosion resistant), 660 bronze (C93200 / SAE 660) for bearing applications, 6061/7075 aluminum (lightweight), and Delrin/PEEK/Nylon for non-lubricated applications. We also stock oil-impregnated bronze for self-lubricating bushings.

Yes. We machine straight, spiral, and cross-hatch lubrication grooves per customer specifications. Groove geometry (width, depth, pitch, and pattern) is programmable and repeatable across production runs. We also machine oil holes, grease fittings, and wiper ring grooves.

On precision-ground IDs, we achieve Ra 0.2µm. On precision-turned IDs, Ra 0.8µm standard, with Ra 0.4µm available with fine boring. Surface finishes are verified with calibrated profilometers. For bearing-grade bushings, we offer honing to Ra 0.1µm for critical applications.

Yes. We machine keyways (square, Woodruff), cross-holes, set-screw flats, and snap-ring grooves as integral features. Keyways are broached or slot-milled per ANSI B17.1, and all features are deburred before final inspection. We also supply mating keys per customer specification.

Standard precision bushings: 3-5 working days for quantities up to 500 pieces. Ground bushings: 5-7 working days. Production runs (500-10,000+): 2-3 weeks. We maintain a ready stock of common material sizes (bar stock) to expedite lead times for standard bushing geometries.