SKF Ultra Power range of Planetary Roller Screws has been optimised to provide the maximum possible life within a compact space envelope. This has resulted in an increase in capacity of up to 60 % over the standard product. Load capacity is independent of lead. To attain L10 life performance a mean working load of up to 80 % of Ca is allowed (50 % for HRP/HRC 60). The maximum load should not be applied on the mounting bolts but on the flange.

Drawing (click to enlarge)

 

Nut type

Nut with central flange

 
 

Nominal screw diameter

d0 [mm]

60

 
 

Lead

Ph [mm]

25

 
 

Dynamic Load

Ca [kN]

495

 
 

Static Load

Coa [kN]

1 206

 
 

Max length

[mm]

4 250

 
 

d2

[mm]

58,1

 
 

d1

[mm]

62,3

 
 

Screw mass

ms [kg/m]

22,2

 
 

Screw inertia

Is [kgmm2/m]

9 990

 
 

Nut mass

mn [kg]

13

 
 

Nut inertia

Inn [kgmm2]

29 700

 
 

Q

[mm]

M8x1

 
 

D3

[mm]

71

 
 

D

[mm]

122

 
 

A

[mm]

171

 
 

A1

[mm]

25

 
 

A3

[mm]

40

 
 

B

[mm]

9

 
 

Grease quantity for nut

Zn [cm3]

90

 
 

D1

[mm]

166

 
 

A2

[mm]

30

 
 

u

[°]

22,5

 
 

Number of hole

[N ]

8

 
 

d

[mm]

13,5

 
 

J

[mm]

146

 
 

G

M12

 
 

Rollers inertia

Ins [kgmm2]

1 680

 

Note :
For SKF Ultra Power range a mean working load of up to 80% of Ca is allowed.