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

Cylindrical nut

 
 

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]

9

 
 

Nut inertia

Inn [kgmm2]

18 700

 
 

w

[mm]

1

 
 

H

[mm]

125

 
 

Q

[mm]

11

 
 

D3

[mm]

71

 
 

D

[mm]

122

 
 

A

[mm]

171

 
 

B

[mm]

9

 
 

Grease quantity for nut

Zn [cm3]

90

 
 

a

[mm]

10

 
 

b

[mm]

8

 
 

l

[mm]

56

 
 

Rollers inertia

Ins [kgmm2]

1 680

 

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