SKF TRU 21x8 丝杠

Range

Standard range

Recirculation type

Planetary roller screw

Nut type

Cylindrical nut

Nominal screw diameter

d0 [mm]

21

Lead

Ph [mm]

8

Preload

Backlash elimination

Number of thread

[N ]

5

Helix angle

? [°]

6,95

Dynamic load category

[kN]

<30

Standard number of rollers

[Nr ]

9

Max. number of rollers

[Nmax ]

10

Dynamic Load

Ca [kN]

32,64

Static Load

Coa [kN]

41,51

Torque for play elimination

Tpe [Nm]

0,33

Nut mass

mn [kg]

0,4

Screw mass

ms [kg/m]

2,7

Screw inertia

Is [kgmm2/m]

149,9

Nut inertia

Inn [kgmm2]

141,2

Rollers inertia

Ins [kgmm2]

6,5

Grease quantity for nut

Zn [cm3]

5,03

d1

[mm]

21,5

d2

[mm]

20

D

[mm]

45

A

[mm]

64

w

[mm]

0,5

a

[mm]

5

b

[mm]

20

H

[mm]

47

Q

[mm]

5

B

[mm]

4

D2

[mm]

40,5

D3

[mm]

26