Ultimate positioning accuracy can be obtained using the fine lead of SV/BV/PV recirculating roller screws. Their great mechanical advantage minimizes input torque and increases resolution. They can simplify a complete transmission and improve its rigidity. They are often used in applications of advancing tech- nology where reliable optimum performance is vital.

Drawing (click to enlarge)

 

Range

Standard range

 
 

Recirculation type

Recirculating roller screw

 
 

Nut type

Cylindrical nut

 
 

Lead

Ph [mm]

1

 
 

Preload

Optimum rigidity

 
 

Number of thread

[N ]

1

 
 

Helix angle

Ø [°]

1,14

 
 

Dynamic Load

Ca [kN]

6,6

 
 

Static Load

Coa [kN]

8,4

 
 

Minimum nut rigidity

Rng [N/µm]

182

 
 

Reference nut rigidity

Rnr [N/µm]

245

 
 

Preload torque

Tpr [Nm]

0,10-0,20

 
 

Preload force

Fpr [N]

1 060

 
 

Nut mass

mn [kg]

0,1

 
 

Screw mass

ms [kg/m]

1,51

 
 

Screw inertia

Is [kgmm2/m]

46,2

 
 

Nut inertia

Inn [kgmm2]

14

 
 

Rollers inertia

Ins [kgmm2]

0,3

 
 

Grease quantity for nut

Zn [cm3]

1,43

 
 

d0

[mm]

15,7

 
 

d2

[mm]

15,1

 
 

D

[mm]

29

 
 

A

[mm]

31

 
 

w

[mm]

0,5

 
 

a

[mm]

3

 
 

b

[mm]

12

 
 

H

[mm]

30,2

 
 

Q

[mm]

5

 
 

D2

[mm]

25

 
 

B

[mm]

4

 
 

d1

[mm]

16