High Precision Insulated Bearing 6318-M-J20AA-C3 is Deep Groove Ball Bearing design. its dimension is 90×190×43mm, it has the same dimension and the same design with normal chrome steel 6318 MC3 bearing. but the most different is 6318-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.
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.
Principle bearing types for traction motor applications
• cylindrical roller bearings
• electrically insulated cylindrical roller bearings
• electrically insulated deep groove ball bearings
• hybrid cylindrical roller bearings with ceramic rollers
• hybrid deep groove ball bearings with ceramic balls
• traction motor bearing units based on cylindrical roller bearings and
deep groove ball bearings
• Sensorised traction motor bearing unit
• Regreasable traction motor bearing unit
| Designation | Mass | Dimensions | R |
|
|
| Load Rating | Fatigue
Limit Load | Limiting
Speed | Reference
Speed |
| EASIER | (kg) | d | D | B | Min | D1 | D2 | d | dyn.Cr | stat.Cor | Cur |
|
|
| 6212-M-J20B-C4 | 0,98 | 60 | 110 | 22 | 1,5 | 95,6 |
| 76,1 | 52 | 36 | 2,24 | 14 000 | 6 800 |
| 6213-J20B-C4 | 1 | 65 | 120 | 23 | 1,5 | 103,1 |
| 82,3 | 60 | 41,5 | 2,55 | 13 000 | 6 300 |
| 6313-M-J20AA-C5 | 2,55 | 65 | 140 | 33 | 2,1 | 117,5 |
| 88,6 | 93 | 60 | 3,95 | 11 000 | 6 400 |
| 6214-2RSR-J20AA-C3 | 1,11 | 70 | 125 | 24 | 1,5 |
| 110,7 | 86,8 | 62 | 44 | 2,9 | 12 000 | 6 100 |
| 6215-M-J2B-C4 | 1,42 | 75 | 130 | 25 | 1,5 | 112,8 |
| 92,5 | 65,5 | 49 | 3,35 | 11 000 | 5 900 |
| 6215-M-P6-J20AA-R85-105 | 1,42 | 75 | 130 | 25 | 1,5 | 112,8 |
| 92,5 | 65,5 | 49 | 3,35 | 11 000 | 5 900 |
| 6315-M-J20AA-C3 | 3,74 | 75 | 160 | 37 | 2,1 | 133,2 |
| 101,8 | 114 | 76,5 | 4,65 | 9 500 | 5 800 |
| 6016-M-J20AA | 0,997 | 80 | 125 | 22 | 1,1 | 111 |
| 94 | 47,5 | 40 | 2,34 | 12 000 | 6 500 |
| 6216-J20AA-C3 | 1,46 | 80 | 140 | 26 | 2 | 121,3 |
| 98,8 | 72 | 54 | 3,45 | 11 000 | 5 500 |
| 6316-J20AA-C3 | 3,75 | 80 | 170 | 39 | 2,1 | 141,8 |
| 108,6 | 122 | 86,5 | 5,2 | 9 000 | 5 500 |
| 6316-M-J20B-C4 | 4,44 | 80 | 170 | 39 | 2,1 | 141,8 |
| 108,6 | 122 | 86,5 | 5,2 | 9 000 | 5 500 |
| F-808916.6316-J20AA | 3,69 | 80 | 170 | 39 | 2,1 | 141,8 |
| 108,6 | 122 | 86,5 | 5,2 | 9 000 | 5 500 |
| 6317-M-J20AA-C3 | 5,05 | 85 | 180 | 41 | 3 | 151,6 |
| 114,4 | 132 | 96,5 | 5,8 | 8 000 | 5 300 |
| 6218-J20AA-C3 | 2,21 | 90 | 160 | 30 | 2 | 139,4 |
| 112,3 | 96,5 | 72 | 4,2 | 9 000 | 5 100 |
| 6318-M-J20AA-C3 | 6,14 | 90 | 190 | 43 | 3 | 157,1 |
| 123,8 | 134 | 102 | 5,8 | 8 000 | 5 100 |
| 6319-M-J20AA-C4 | 7,05 | 95 | 200 | 45 | 3 | 166,9 |
| 129,1 | 146 | 114 | 6,4 | 7 500 | 4 950 |
| 6220-J20C-C3 | 3,3 | 100 | 180 | 34 | 2,1 | 154,8 |
| 124,7 | 122 | 93 | 5,4 | 8 000 | 4 800 |
| 6220-M-J20AA-R95-120 | 3,9 | 100 | 180 | 34 | 2,1 | 154,8 |
| 124,7 | 122 | 93 | 5,4 | 8 000 | 4 800 |
| 6320-M-J20AA-C3 | 8,64 | 100 | 215 | 47 | 3 | 179 |
| 138,6 | 163 | 134 | 7,4 | 7 000 | 4 650 |
| 16021-M-J20AA-C5 | 1,42 | 105 | 160 | 18 | 1 | 141,2 |
| 124,2 | 54 | 54 | 2,39 | 9 500 | 3 950 |
| 6322-M-J20AA-C3 | 11,7 | 110 | 240 | 50 | 3 | 197,4 |
| 153,4 | 190 | 166 | 8,6 | 6 300 | 4 150 |
| 6324-M-J20AA-C3 | 15 | 120 | 260 | 55 | 3 | 214,9 |
| 165,1 | 212 | 190 | 9 | 6 000 | 3 850 |
| 6326-M-J20AA-C3 | 18,3 | 130 | 280 | 58 | 4 | 231,2 |
| 178,9 | 228 | 216 | 9,8 | 5 600 | 3 500 |
| 6230-J20AA | 10,3 | 150 | 270 | 45 | 3 | 229,1 |
| 191,6 | 176 | 170 | 7,8 | 5 600 | 3 350 |
| 6336-M-J20AA-C4 | 43 | 180 | 380 | 75 | 4 | 317 |
| 245,2 | 355 | 405 | 16,3 | 3 800 | 2 440 |
Typical Damage Caused by Electrical Current Passing through the Bearing
Regardless of whether a bearing was exposed to direct current or alternating current (up to frequencies in the MHz range), the resulting changes to the surface are always the same: Uniformly dull, gray marks in the raceways and on the rolling elements. These marks are not very specific and can also be caused by other factors (e. g. lubricating oil containing abrasives).
Type:
Deep groove ball bearing, cylindrical roller bearing
Inner diameter:
50 mm to 110 mm
Dimensional deviation:
Compatible with traditional bearings
Electrically Insulated Bearing can protect the machine to be exposed to electrical current. In a worst-case scenario, this can damage raceways and rolling elements, which in turn, causes the motor or generator to fail prematurely and without warning. On top of the extra expenses incurred for repairs, this also means additional costs caused by machine downtime and the resulting production losses.
Electrically Insulated Bearing are not only Electrically Insulated deep groove ball Bearing, but also Electrically Insulated Cylindrical Roller Bearing, Electrically Insulated Tapered Roller Bearing, Electrically Thrust Roller Bearing and the other type Normal or Non-Standard Electrically Insulated Rolling Bearings. they are the same dimension, same cage, same elements and the other data with normal chrome steel rolling bearing, just the different coating on the surface of the inner ring or outer ring of the Rolling Bearing.
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