6221M/C3VL0271 6221M/C3J20C 105x190x36mm inner ring insulated bearings for wind turbine
Key attributes
Industry-specific attributes
Applicable Industries
Building Material Shops, Machinery Repair Shops, Retail, Energy & Mining, Other
Bore Size
104.99 - 105 mm
Precision Rating
P5 P6 P2 P0 P4 P3
Number of Row
Single row
Other attributes
Place of Origin
China
Type
BALL
Structure
Deep Groove
Model Number
6221M/C3VL0271
Seals Type
open 2RS ZZ
OEM Service
Custom Bearing's Size Logo Packing
Feature
insulation
Brand
OEM Famous Brand
Product name
insulated bearing
Material
Chrome Steel GCR15
Application
Electric Motors
Model
6320M/C3VL0271
Certificate
ISO 9001:2000
Keywords
ceramic-coated
Sample
Avialable
6221M/C3VL0271 6221M/C3J20C 105x190x36mm inner ring insulated bearings for wind turbine
Why we use electrically insulated bearings
1.Motor bearings play an important role in the efficient operation of motors. Even with strict production control during motor manufacturing, it is difficult to completely avoid magnetic asymmetry of the armature and rotor. This asymmetry generates a voltage between the stators. The current through the bearings is even worse, especially in AC motors. This current produces corrosion pits, fusion marks, galvanic corrosion marks, discoloration, abrasion and other damage on the bearing raceways and rolling element surfaces. Of course, motors with inverter and 0-converter technology also produce this phenomenon. In order to block the current flowing through the bearings, it is necessary to cut off the electrical circuit, so insulated bearings and insulated bearing housings are created.
Where are electrically insulated bearings used? 1. Electric power industry: Insulated cylindrical roller bearings for generators, wind turbines, hydroelectric generators, and thermal generators. They are suitable for motors and generators, especially for variable frequency motors. 2. Railway industry: Insulated cylindrical roller bearings for diesel locomotive traction motors: used in locomotives, etc. 3. Machinery and metallurgical industry: Insulated bearings for high-power variable frequency motors: used in cranes, textile machinery, printing machinery, iron-making equipment, steel-making equipment, steel rolling equipment, cutting equipment, coking equipment, complete sets of smelting equipment, etc. 4. Mining machinery industry: Insulated bearings for high-power high-voltage motors, suitable for mining machinery, coal preparation machines, coal washers, crushers, ball mills, grinders, and sand mills 5. Petrochemical industry: Insulated bearings for high-power explosion-proof motors: used in compressors, etc.
Model | Cage | Cr（KN） | Cor (KN) | Grease lubrication speed | Oil lubricated speed | Weight (kg) | Insulation class | ||
6221/C3VL0271 | Steel | 140 | 104 | 7000 | 4500 | 3.73 | 2000V | 3000V | |
6221M/C3VL0271 | Brass | 140 | 104 | 7000 | 4500 | 3.73 | 2000V | 3000V | |
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