Spindle bearings are single row angular contact ball bearings comprising solid inner and outer rings and ball and cage assemblies with solid window cages. They cannot be dismantled. The bearings are available in both open and sealed versions.
Spindle bearings have restricted tolerances. They are particularly suitable for where requires very high guidance accuracy and speed capacity, especially for slewing part of the main spindle of machine tool
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Single row angular contact ball bearings can accommodate axial loads acting in one direction only. Under radial loads a force acting in the axial direction is engendered in the bearing, and this force must be counteracted. Consequently the bearing is normally adjusted via a second bearing. |
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Single row angular contact ball bearings have one high and one low shoulder. Some bearings, particularly those of Diameter Series 8 and 9, have an inner ring with two high shoulders as a deep groove ball bearing. The low shoulder on one or both rings enables a large number of balls to be filled in the bearing, thus giving the bearings a relatively high load carrying capacity. They are of inseparable design. |
| Comparison of tolerance classifications of national standards | |||||||
| Standard |
Applicable |
Tolerance Class | Bearing Types | ||||
| Chinese Industrial Standard(GB) | GB 307.1 | P0 | P6 | P5 | P4 | P2 | All types |
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International |
ISO 492 | Class 6x | Class 6 | Class 5 | Class 4 | Radial bearings | |
| ISO 199 | Normal class | Class 6 | Class 5 | Class 4 | Thrust ball bearings | ||
| ISO 1224 | Class 5A | Class 4A | Precision instrument bearings | ||||
| Deutsches institut for Normung(DIN) | DIN 620 | P0 | P6 | P5 | P4 | P2 | All types |
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