Precision Hardened
Steel Bushings
Engineered for high-load, low-speed heavy machinery applications. We manufacture custom steel bushings with precise tolerances, heat treatment, and oil grooves tailored to your drawings.
Built for Extreme Durability
Steel bushings (also known as plain bearings or sleeve bearings) are critical components designed to reduce friction and wear between moving mechanical parts. Unlike bronze bushings, hardened steel bushings excel in high-load, low-speed environments where impact resistance is paramount.
High Load Capacity
Capable of withstanding extreme static and dynamic loads, making them ideal for hydraulic cylinders and pivot points.
Wear Resistance
Through-hardened or case-hardened treatments (up to HRC 58-62) ensure extended service life in abrasive environments.
Custom Machining
Internal/external oil grooves, grease holes, flanges, and specific tolerances machined exactly to your OEM specifications.
Material & Specifications
We offer a variety of steel grades and heat treatment options to match your specific application requirements.
| Common Materials |
GCr15 (Bearing Steel) 40Cr (Structural Steel) 45# (Carbon Steel) 20CrMnTi (Carburizing Steel) |
|---|---|
| Hardness (HRC) |
Through Hardened: 58-62 HRC Induction Hardened: 50-55 HRC Tempered: As required |
| Surface Finish | Ra 0.4 - Ra 0.8 (Grinding / Polishing) |
| Surface Treatment |
Phosphating (Black) Zinc Plating (Galvanizing) Chrome Plating Anti-rust Oil |
| Lubrication Features |
Internal/External Oil Grooves (Figure-8, Spiral, Straight) Grease Holes / Nipples |
| Tolerance |
ID: H7, H8, F7 OD: m6, r6, n6 Or per drawing |
Common Types
Plain Sleeve
Standard cylindrical form
Flanged Bushing
With locating shoulder
Grooved
Internal oil distribution
Pin & Bush Set
Matched assembly
Precision Manufacturing
1. Material Selection
Sourcing high-quality alloy steel bars or tubes with strict chemical composition checks.
2. CNC Turning
Rough and finish turning to establish dimensions, chamfers, and oil grooves.
3. Heat Treatment
Quenching and tempering to achieve the required depth and surface hardness (HRC).
4. Precision Grinding
Final OD/ID grinding to achieve tight tolerances (IT7) and mirror-like surface finish.
Typical Applications
Request a Quote
Please provide your specifications or drawings. We typically respond within 24 hours.
- Factory Direct Pricing
- MOQ: 500 Pcs / Size
- OEM / Custom Drawings