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Bearing type:screw roller bearing
Domestic new model: 7921 c/DT
Inside diameter (mm) : 105
Outside diameter (mm) : 145
Width (mm) : 40
Grease lubrication speed (r/min) : 5300
Cor (kN) : 123 Cr (kN) : 92.1
Lubrication speed (r/min) : 7100,
Weight (KG) : 1.62
Rolling screw roller bearing system adopts the steel belt winding screw roller. So called spiral roller bearing. This kind of bearing has great flexibility and radial clearance, able to withstand the impact of the big radial direction load, unable to bear axial load, limit rotational speed is low. Is only applicable to rotating accuracy is not high, and often have a larger impact load components. Axis bearing installation allows the axis of the inner ring and outer ring is 0.5 ° inclined. Due to the elastic deformation of the bearing, in the work can not guarantee the accuracy, so the precision of spiral roller bearings only regular grade a, there is no other precision level.
Bearing inner ring and outer ring by rolled alloy steel belt, and after the special craft processing and assembled. Spiral slot on the surface of the bearing inner and outer ring, can make the lubricating oil for the bearing working surface evenly. Bearing under the condition of the operation condition of the temperature difference is bigger, can automatically compensate bearing fit size.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 635Z NTN | 5 | 19 | 6 |
| 625Z NTN | 5 | 16 | 5 |