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Blue POM DX Bushing Metal Polymer Composite Plain Bearing SF-2 Self lubricating Bushes
ZR-020B boundary lubricating POM bushing is a type of DX bearing with blue color POM coating. This type of metal ploymer composite plain bearing has same material structure with other DX bearing. It's also called SF-2 boundary lubricating bearing, three layer oilless bearing,plain sliding bearing and dry bushes.
Material Structure
1. POM with fillers
2. Porous bronze
3. Steel backing
4. Copper plating or tin plating
Characteristics
Low friction, anticorrosion and long life
Suitable for marginally lubricated and dry operating conditions
Performance is similar to DS bushing in foreign country
Availability
Standard cylindrical DX bearing, DX thrust washers and strips are available.
Special designs can be made according to your design
Application
ZR-020B composite plain bearing is widely used in hoisters, bulldogger, tower cranes, and printing or dyeing machines for textiles, steering gear, power steering and so on
Technical Data
| Max Load (Static) | 250N/mm² | Operation Temperature range | -40°C~+110°C | ||
| Max Load (Very low speed) | 140N/mm² | Max.speed | Greased | 2m/s | |
| Max Load(Rotating oscillating) | 70N/mm² | Continuous oiling | >2m/s | ||
| Max. PV Grease Lubricated | 3N/mm²*m/s | Thermal conductivity | 50W(m*K)-1 | ||
| Coefficient of thermal expansion | 11*10-6*K-1 | Friction coefficient | 0.05~0.20 | ||
| The oil deposits have to be filled with grease before bearing assembling. | |||||
Tolerance Details
Housing ØH7
Bushing inner-Ø after installation D9 to D10
Shaft tolerance h8
Mouting Suggestion
Housing: Mounting bevel min. 1.5 mm x 15-45°
Shaft Material:Steel, hardened or untempered, surface roughness ≤ Rz 4-6
Shaft: Mounting bevel 5 mm x 15°, edges rounded
The application of an adequate force fitting mandrel is advisable. Grease lubrication of the outer surface may be necessary when mounting.
Stick-in: Adhesive should not contact the sliding surface
