| Model | Circulation type | Characteristic | Type |
| SFU | Internal circulation type |
Delicated diameter of screw takes only little space Applicable to those with smaller lead/the outside diameter of the screw |
Flange type |
| DFU | Internal circulation type |
Delicated diameter of screw takes only little space Applicable to those with smaller lead/the outside diameter of the screw |
Flange type |
In SFU types of nuts, by using the internal circulator which makes the ball pass over the crest diagonally, the ball will return to the starting point. Normally, one roll of balls will fit with one circulation. , SFU types of nuts need at least one side which is completely tooth passing, which is applicable for smaller shaft diameter
SFU ball screw diameter:12,16,20,25,32,40,50,63,80,100
SFU ball screw pitch:4,5,10,20,
SFU ball screw model:DFU1204/1605/1610/2005/2505/2510/3205/3210/4005/4010/5010/5020/6310/6320/8010/8020/10020
DFU ball screw diameter:12,16,20,25,32,40,50,63,80,100
DFU ball screw pitch:4,5,10,20,
DFU ball screw model:DFU1605/1610/2005/2505/2510/3205/3210/4005/4010/5010/5020/6310/6320//8010//8020/10020
