SKF has developed a unique CNC process and equipment for high precision rolled screws. The combination of Hightech machines and the control of the cold forming and metallurgical processes result in a screw that has virtually the same accuracy and performance of a ground unit at a lower cost.

Drawing (click to enlarge)

 

Nominal screw diameter

d0 [mm]

25

 
 

Lead

Ph [mm]

5

 
 

Preload

Axial play

 
 

Dynamic load category

[kN]

10-20

 
 

Max length

[mm]

5 000

 
 

Dynamic Load

Ca [kN]

13

 
 

Static Load

Coa [kN]

22,7

 
 

Number of ball circuits

3

 
 

Max. axial play

[mm]

0,1

 
 

Reduced max. axial play

[mm]

0,05

 
 

Nut mass

mn [kg]

0,29

 
 

Screw mass

ms [kg/m]

3,3

 
 

Screw inertia

Is [kgmm2/m]

224

 
 

d2

[mm]

21,7

 
 

d1

[mm]

24,6

 
 

D

[mm]

38

 
 

D1

[mm]

62

 
 

A

[mm]

46,5

 
 

A2

[mm]

12

 
 

A3

[mm]

15

 
 

A1

[mm]

0

 
 

J

[mm]

50

 
 

D5

[mm]

6,6

 
 

Q

[mm]

M6 x 1