MG-2Y SP strip is a lead-free boundary lubricated bearing material manufactured with a low-carbon steel backing, a sintered porous bronze powder interlayer, and a POM (polyoxymethylene) fiber-filled polymer surface. This bimetal composite design provides high load capacity, good wear resistance, and low friction. The SP strip is supplied in standard metric sheet sizes and can be fabricated into custom components such as thrust washers, wear plates, and slide pads. The POM surface features lubrication indents that retain grease, allowing the bearing to operate for extended periods without external oiling. MG-2Y SP strip is widely used in metallurgy machinery, mining machinery, water conservancy machinery, automobile industry, building machinery, agriculture machinery, and rolling steel industry applications where lead is unacceptable.[reference:0]
◆ Material Structure
MG-2Y SP strip consists of four distinct layers:[reference:1]
1. POM with fiber – 0.3~0.5mm. Polyoxymethylene filled with fiber reinforcement provides low friction, high stiffness, and excellent wear resistance.[reference:2]
2. Porous bronze powder – 0.2~0.35mm. Sintered spherical bronze layer creates a strong mechanical bond to the steel backing and acts as a reservoir for the POM polymer.[reference:3]
3. Steel backing – 0.4~2.2mm. Low-carbon steel strip provides high mechanical strength and structural integrity for press-fit installation.[reference:4]
4. Plated coating – Tin plating 0.005mm or copper plating 0.008mm for corrosion resistance.[reference:5]
◆ Technical Data
| Technical Data – MG-2Y SP Strip | |
| Max. static load | 250 N/mm²[reference:6] |
| Max. load (very low speed) | 140 N/mm²[reference:7] |
| Max. load (rotating / oscillating) | 70 N/mm²[reference:8] |
| Max. PV (dry running) | 3 N/mm²·m/s[reference:9] |
| Temperature range | -40°C to +110°C[reference:10] |
| Friction coefficient | 0.05 ~ 0.20[reference:11] |
| Max. speed (grease lubrication) | 2 m/s[reference:12] |
| Max. speed (oil lubrication) | >2 m/s[reference:13] |
| Thermal conductivity | 50 W/(m·K)[reference:14] |
| Coefficient of thermal expansion | 11 × 10⁻⁶ /K[reference:15] |
◆ Standard Metric Sizes
MG-2Y SP strip is available in the following standard metric sheet sizes. Custom sizes are available upon request.[reference:16]
| Model | Length L±1 (mm) | Width W±1 (mm) | Thickness Ss -0.05 (mm) |
|---|---|---|---|
| P | 500[reference:17] | 150[reference:18] | 1.0[reference:19] |
| P | 500[reference:20] | 150[reference:21] | 1.5[reference:22] |
| P | 500[reference:23] | 150[reference:24] | 2.0[reference:25] |
| P | 500[reference:26] | 150 | 2.5[reference:27] |
Note: Standard sheet size: 500mm (L) × 150mm (W). Thickness options: 1.0mm, 1.5mm, 2.0mm, 2.5mm.[reference:28]
◆ Key Features
● Lead-Free Construction – MG-2Y SP strip contains no lead, making it suitable for environmental compliance (RoHS) and applications where lead is unacceptable.[reference:29]
● Good Load Capacity and Anti-Wear – Designed for high load capacities and low speed with rotating, oscillating, or frequent stop-start motion.[reference:30]
● Extended Operation Without Relubrication – Can work for a long time without oil under boundary lubrication conditions when pre-lubricated with lubrication indents design.[reference:31]
● Machinable POM Surface – The thicker POM layer allows for post-processing fabrication into custom components such as thrust washers, wear plates, and slide pads.
◆ Application Areas
MG-2Y SP strip is widely used in various industrial applications, including:[reference:32]
● Metallurgy machinery and steel rolling industry
● Mining machinery and construction equipment
● Water conservancy machinery and hydropower equipment
● Automobile chassis and automotive components
● Building machinery and construction equipment
● Agriculture machinery and heavy machinery
● Forging machines, power stations, and civil engineering applications
◆ Fabrication & Customization
MG-2Y SP strip can be fabricated into various components:
● Thrust washers
● Wear plates and slide pads
● Custom-shaped components per customer specifications
● Components with or without lubrication indents
