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]

32

 
 

Lead

Ph [mm]

10

 
 

Preload

Backlash elimination by oversize balls

 
 

Dynamic load category

[kN]

20-30

 
 

Max length

[mm]

6 000

 
 

Dynamic Load

Ca [kN]

28,9

 
 

Static Load

Coa [kN]

55,7

 
 

Number of ball circuits

4

 
 

Preload torque

Tpr [Nm]

0,32

 
 

Max. axial play

[mm]

0,12

 
 

Reduced max. axial play

[mm]

0,08

 
 

Nut mass

mn [kg]

0,79

 
 

Screw mass

ms [kg/m]

5,6

 
 

Screw inertia

Is [kgmm2/m]

639

 
 

d2

[mm]

27,8

 
 

d1

[mm]

32

 
 

D

[mm]

54

 
 

M

M48 x 1,5

 
 

A

[mm]

95

 
 

A2

[mm]

19

 
 

A3

[mm]

15

 
 

A1

[mm]

15

 
 

Q

[mm]

M6 x 1

 
 

Tightening spanner

HN7

 
 

N

[mm]

8