MG-2Y steel bronze powder with POM marginal bearing is a high-performance boundary lubricated bearing. It consists of a low-carbon steel backing for mechanical strength, a sintered porous bronze powder interlayer, and a POM (polyoxymethylene) polymer surface layer with fiber reinforcement. This design provides good load capacity, wear resistance, and low friction, making it suitable for various industrial applications where conventional plain bearings require frequent lubrication.
◆ Features
Suitable for boundary lubrication conditions with low coefficient of friction (0.05–0.20), good wear resistance, and stable sliding characteristics. POM material offers high stiffness and excellent dimensional stability, making the bearing suitable for high load capacities and low speed operations with rotating, oscillating or frequent stop-start motion.[reference:0][reference:1]
Lead-free construction ensures environmental compliance and safe operation in applications where lead is unacceptable. The bearing can work for a long time without oil under boundary lubrication conditions when prelubricated with lubrication indents. Periodic oil or grease lubrication will extend the working life span.[reference:2][reference:3]
The thick POM layer is machinable, allowing for post-processing adjustments to achieve precise dimensions. Additionally, the bearing exhibits good corrosion resistance for use in environments exposed to moisture or corrosive substances.
◆ Material Structure:
1. POM with fiber 0.3–0.5mm – modified polyoxymethylene with high wear resistance and low friction.[reference:4][reference:5][reference:6]
2. Porous bronze powder 0.2–0.35mm – sintered spherical bronze layer for strong bonding and heat dissipation.[reference:7][reference:8][reference:9]
3. Steel backing 0.4–2.2mm – low-carbon steel for high mechanical strength and press-fit capability.[reference:10][reference:11][reference:12]
4. Plated coating – tin plating 0.005mm or copper plating 0.008mm for corrosion resistance.[reference:13][reference:14][reference:15]
◆ Technical Data:
| Technical Data | ||
| Max. load | Static | 250 N/mm² |
| Very low speed | 140 N/mm² | |
| Rotating oscillating | 70 N/mm² | |
| Max. PV (dry running) | 3.0 N/mm²·m/s | |
| Temp. limit | -40°C ~ +110°C | |
| Friction coefficient | 0.05 ~ 0.20 | |
| Max. speed | Grease lubrication | 2.0 m/s |
| Oil continued operation | >2.0 m/s | |
| Thermal conductivity | 50 W/(m·K) | |
| Coefficient of thermal expansion | 11 × 10⁻⁶ /K | |
◆ Application Areas
MG-2Y is widely used in heavy machinery where high loads and low to moderate speeds are common, including:
● Metallurgy machinery and rolling steel industry[reference:16][reference:17][reference:18]
● Mining machinery and heavy construction equipment[reference:19][reference:20][reference:21]
● Automobile chassis, suspension components, and automotive systems where lead-free bearings are required[reference:22][reference:23][reference:24]
● Forging machines and hydraulic presses[reference:25][reference:26]
● Agricultural machinery and water conservancy equipment[reference:27][reference:28][reference:29]
● Power stations and civil engineering applications[reference:30][reference:31]
Available forms include cylindrical bushings, flanged bushings, thrust washers, and wear plates, with custom sizes and non-standard parts available upon request. MC尼龙轮[reference:32]
◆ Assembly Note
The bearing is machinable for the thicker layer of POM. Initial pre-lubrication at assembly is strongly recommended. The bearing surface includes lubrication indents, and when assembling, lubrication grease must be fully applied into the oil pockets.[reference:33] The bearing can work for a long time without additional oil under boundary lubrication conditions, but periodic oil or grease lubrication will significantly extend its working life span.[reference:34][reference:35]
