SF-2Y Grease Storage Indent Boundary Lubricating Bearing for Automotive & Construction Machinery
Product Details
| Static Load Capacity: | 250 N/mm² | Dynamic Load Capacity: | 70 N/mm² (140 N/mm² For Low-speed Operation) |
|---|---|---|---|
| Friction Coefficient (μ): | Grease Lubrication: 0.05 ~ 0.12 | Operating Temperature Range: | -40℃ ~ +120℃ |
| Max Sliding Speed (grease Lubricated): | 2.5 M/s | Max PV Value (Grease Boundary Lubrication): | 22 N/mm²·m/s |
| Thermal Conductivity: | 52 W/(m·K) | Linear Expansion Coefficient: | 11×10⁻⁶ /K |
| Recommended Shaft Hardness: | ≥ HB270 | Recommended Shaft Roughness: | Ra 0.4 ~ 1.25 μm |
| Highlight |
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Product Description
1. Material Structure
SF-2Y is a three-layer composite boundary lubricated bushing, lead-free upgraded version based on SF-2 series, yellow POM sliding surface with grease storage indents.
Backing: Low carbon steel base with anti-corrosion plating
Middle layer: Porous sintered spherical bronze powder (0.2~0.3mm), good thermal conductivity
Surface layer: Modified POM composite layer (0.3~0.5mm), lead-free formula with pre-machined grease pockets
2. Material & Performance Features
Lead-Free & RoHS Compliant: Eco-friendly formula without lead, meets strict environmental requirements for export markets.
Boundary Lubrication Design: Grease storage indents on POM surface, retains lubricant for intermittent / thin oil working conditions.
Low Speed & Medium-High Load Resistance: Excellent wear resistance for rotary, oscillating and linear reciprocating motion.
Good Embeddability & Dimensional Stability: Low water/oil absorption, stable dimension, tolerates minor shaft contamination and misalignment.
Cost-Effective Replacement: Ideal substitute for traditional solid bronze bushes, reduces overall component cost.
3. Application Scenarios
Suitable for medium-load, low-speed boundary lubrication applications. Widely used in automotive chassis parts, pedal assemblies, steering components, metallurgical machinery, mining equipment, agricultural machinery, construction machinery hinge bushes and forging machine sliding sleeves.
Product Highlights
1. Material Structure SF-2Y is a three-layer composite boundary lubricated bushing, lead-free upgraded version based on SF-2 series, yellow POM sliding surface with grease storage indents. Backing: Low carbon steel base with anti-corrosion platingMiddle layer: Porous sintered spherical bronze powder ...
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