Description
    Nut models: UPFC, USFC
Unit: mm
Remarks 
1. We recommend NSK support unit WBK12-01A (square type, fixed side), WBK12S-01 (square type, simple support 
side), and WBK12-11 (round type, fixed side). 
2. NSK grease LR3 is recommended. The amount for replenishing should be about 50% of nut internal space capacity. 
3. Permissible rotational speed is determined by a d • n value and a critical speed. See page B509. 
Root diamet