High Precision Insulated Bearing 6332 M/C3VL2071 is Deep Groove Ball Bearing design. its dimension is 160×340×68mm, it has the same dimension and the same design with normal chrome steel 6332 /C3 bearing. but the most different is 6332-M-J20AA-C3 bearing with Aluminium Oxide Coating. the coating can Electrical Resistance Voltages up to 3000 V DC. This kind of bearing are widely used in high quality demand application like traction motor.
Electrically Insulated Bearings in electric motors and generators must support the rotor radially and locate it axially in relation to the stator. The typical bearing system consists of a locating and a non locating bearing. In most medium and large motors and generators, the locating bearing is a deep groove ball bearing, while the non-locating bearing can be a deep groove ball bearing, an N or NU design cylindrical roller bearing or a CARB toroidal roller bearing. Smaller motors, fitted with two deep groove ball bearings mounted on a short shaft, often have a cross-locating bearing system.
The Coating Process
The plasma spraying process involves generating an arc between two electrodes to ionize a noble gas that is issued from the plasma torch. The resulting plasma jet is used to carry the injected aluminum oxide powder. This powder is melted by the heat and sprayed at high speed onto the outer or inner ring. When applied in this manner, the oxide layer adheres extremely well to the base material. It is then sealed and ground to size.
| Designation | Principal dimensions | Basic load ratings | Fatique load limit | Speed ratings | Weight |
| Deep groove ball bearing | mm | mm | mm | dynamic | static |
| Reference speed | Limiting speed | kg |
| d | D | B | C[kN] | C0[kN] |
| [r/min] | [r/min] |
| 6322/C3VL0241 | 110 | 240 | 50 | 216 | 180 | 5.7 | 6000 | 3800 | 9.7 |
| 6322 M/C3VL0241 | 110 | 240 | 50 | 216 | 180 | 5.7 | 6000 | 5300 | 11 |
| 6224/C3VL0241 | 120 | 215 | 40 | 153 | 118 | 3.9 | 6300 | 4000 | 5.3 |
| 6324/C3VL2071 | 120 | 260 | 55 | 216 | 186 | 5.7 | 5600 | 3400 | 12.7 |
| 6324 M/C3VL2071 | 120 | 260 | 55 | 216 | 186 | 5.7 | 5600 | 5000 | 15 |
| 6226/C3VL2071 | 130 | 230 | 40 | 163 | 132 | 4.15 | 5600 | 3600 | 5.8 |
| 6326/C3VL2071 | 130 | 280 | 58 | 242 | 216 | 6.3 | 5000 | 3200 | 15.5 |
| 6326 M/C3VL2071 | 130 | 280 | 58 | 242 | 216 | 6.3 | 5000 | 4500 | 16.5 |
| 6228/C3VL2071 | 140 | 250 | 42 | 174 | 150 | 4.55 | 5300 | 3400 | 7.5 |
| 6328/C3VL2071 | 140 | 300 | 62 | 265 | 245 | 7.1 | 4800 | 3000 | 18.7 |
| 6328 M/C3VL2071 | 140 | 300 | 62 | 265 | 245 | 7.1 | 4800 | 4300 | 21.8 |
| 6230/C3VL2071 | 150 | 270 | 45 | 186 | 166 | 4.9 | 5000 | 3200 | 10 |
| 6330/C3VL2071 | 150 | 320 | 65 | 286 | 285 | 7.8 | 4300 | 2800 | 23 |
| 6332 M/C3VL2071 | 160 | 340 | 68 | 291 | 285 | 7.65 | 4000 | 3800 | 31 |
| 6334 M/C3VL2071 | 170 | 360 | 72 | 332 | 340 | 8.8 | 3800 | 3400 | 35 |
| 6336 M/C3VL2071 | 180 | 380 | 75 | 371 | 405 | 10.4 | 3600 | 3200 | 41 |
Medium to large motors Electric motors intended for belt drives can use an N or NU cylindrical roller bearing or a CARB bearing as the non-locating bearing on the drive end (DE) to accomodate radial loads generated by the belt tension. Because these bearings accommodate thermal elongation of the shaft relative to the housing within the bearing, their rings must be located axially on the shaft and in the housing. Note that an interference fit alone is not sufficient to secure a bearing ring axially.
Most motors are designed with a locating/ non-locating bearing system. The locating bearing positions the shaft axially. The non locating bearing is designed to accommodate thermal elongation of the shaft to avoid induced axial loads. For the locating bearing position, radial bearings that can accommodate combined (radial and axial) loads are used. These include deep groove ball bearings, matched single row angular contact ball bearings, double row angular contact ball bearings and spherical roller bearings.
For the locating bearing position, radial bearings that can accommodate combined (radial and axial) loads are used. These include deep groove ball bearings, matched single row angular contact ball bearings, double row angular contact ball bearings and spherical roller bearings. There are two ways to accommodate thermal displacements of the shaft at the non locating bearing position.
The first is to use a bearing that only accommodates radial loads and enables axial displacement within the bearing. These include CARB toroidal roller bearings and those cylindrical roller bearings that have one ring without flanges. The other method is to use a radial bearing mounted with a loose fit in the housing so that the outer ring is free to move axially.
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