| ,Importer,,Wholesaler,Retailer | |
| Tehran |  |
| 09126482568 | |
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| rollpars.bearing@gmail.com | |
The NACHI industrial bearing model 21312 is a double-row spherical roller bearing designed to support both radial and axial loads simultaneously. It has an inner diameter of 60 millimeters, an outer diameter of 130 millimeters, and a width of 31 millimeters. The inner ring features a spherical raceway that allows self-alignment of up to 1.5 degrees. Rolling elements are made of hardened chrome alloy steel with a surface hardness of 58 to 64 HRC. Dimensional tolerance meets ISO 492 standards with a P6 precision class. The machined brass cage ensures smooth operation and excellent heat resistance.
Manufacturing of the NACHI 21312 bearing involves precision grinding and controlled heat treatment to enhance durability under heavy load conditions. It operates within a temperature range of minus 30 to plus 150 degrees Celsius. Lubrication is provided using lithium-based NLGI-2 grease or ISO VG 100 industrial oil. The permissible rotation speed is 4000 rpm with grease and 5500 rpm with oil. This model is widely used in steel mills, cement plants, turbines, and heavy industrial machinery due to its robust structure and long service life.
WEBSITE: NACHI industrial bearing model 21312 Iran
