| Characteristics |
SP Type |
BP Type |
BS Type |
| Material |
- Alloy copper (self-lubrificating type), of powder metallurgical
- Lower precision
|
- Ball Bearing
- Higher precision
|
- Alloy copper/Ball Bearing
- Between the left two
|
| Structure Design |
Copper Alloy (sleeve type) |
Ball |
Sleeve (Hemisphere type) Ball |
| Manner of use |
- The relative movement between bearing and shaft is of line contact
- Larger running friction
- Oil is deposited at the inner side of ID of bearing by vacuum impregnating and oil film formed with the heat generated through running friction
- Cooling fan is fixed vertically and is better in use
|
- The relative movement between bearing and shaft is of point contact
- Lower running friction
- Ball inside the bearing is positioned by holder and rotates under the assistance of lubricating grease
- Cooling fan can be fixed in any direction
|
- Both point and line contact
- Running friction is between the two at left
- It has both SP/BP types features in use, and the operation load falls at the front end of ball, and copper alloy at the rear end is basically a support and adjust concentrically after positing of ball
- Cooling fan is fixed vertically and is better in use
|
| Noise |
Under low speed, quieter in the early stage of operation |
Noise is lower under high speed operation |
Noise is lower under high speed operation |
| Temperature Resistance |
- Working temp.: -10°C ˜+70°C
- Poorer heat shock capacity
|
- Working temp.: -30°C ˜+75°C
- Better heat shock capacity
|
- Working temp.: -10°C ˜+70°C
- Heat shock capacity in between
|
| Lubrication |
Lubricant tends to lose at high temp. |
Lubricating grease is not likely to loss |
Between the left two |
| Service Life |
Shorter (Averaged at appx. 20.000˜30.000Hrs/40°C) |
Longer (Averaged at appx. 35.000˜50.000Hrs/40°C) |
Between the left two (Averaged at appx. 25.000˜40.000Hrs/40°C) |
| Cost |
Lower |
Higher |
Next to it |
