ball screws
•     1-3 Day Lead Time                      X     5-7 Week Lead Time
Series Screw
Diameter
Lead (mm) Maximum
Length (mm)
1 2 2.5 3 4 5 6 8 10 16 20 25 32 40 50 64
SFK
6 900
8 1000
10 1500
12
14
BSH
8 1000
10 1500
12
20 3000
25 6000
SFS
12 1500
15 3000
20
25 6000
31
32
38
40
48
50
SFU
12 1500
16 3000
20
25 x x 6000
32 x x
40 x x
50 x
63
80
SFV
12 1500
16 3000
20 x x
25 x x x 6000
32 x x
40
50 x x
63 7000
80
SCI
16 3000
20
25 6000
32
40
50
63 7000
Series Screw
Diameter
Lead (mm) Maximum
Length (mm)
1 2 2.5 3 4 5 6 8 10 16 20 25 32 40 50 64
SFI
16 x 3000
20
25 6000
32
40
50
63 7000
80
DFI
16 x 3000
20
25 6000
32
40
50
63 7000
80
DFU
16 3000
20 x x
25 x x 6000
32 x x
40 x x
50 x
63 7000
80
DFV
15 x 3000
16
20 x
25 x x 6000
32 x x
40
50 x x
63 7000
80
DFS
15 3000
20
25 x 6000
31
32
38
40
48
50
SFE
16 x 3000
20
25 x 6000
32 x
40
50


Frequently Asked Questions
What ambient conditions are needed for a ball screw?
Most ball screws can be used in ambient temperatures ranging from -4 to +194°F. It is possible to go up to 230°F by altering the material of the liners, which divert the balls from their track.

Are ball screws energy efficient?
Ball screws are energy efficient. Ball screw systems are able to achieve linear motion with average system efficiencies of 90%. This far exceeds linear actuators and screw jacks (generally 40% and 25%, respectively). In addition, ball screws are advantageous in that no energy is required while they are at a standstill, unlike with pneumatic and hydraulic systems, which require continued pressurization.

What is the lifetime of a ball screw?
The lifetime of ball screws varies based on the actual loads, rated loads, any shock loading, and the speed. If a target lifetime is specified, adjustments can be made to the features and sizing of the ball screw in order to achieve it.

What performance is possible with a ball screw?
Dynamic load ratings for industrial ball screws typically range from 1 to 150kN. In practice, however, operating factors will reduce these loads. Speed, load, and duty cycle effect performance and lifetime. Dynamic load ratings are based on 1,000,000 revolutions at that load. Linear speed depends on the rotation speed of the screw and the pitch of the screw (which is generally between 5 to 40mm). Linear speed of 2m/s can be achieved for light loads. Any and all loads should ideally be in-line with the screw, as radial loads are adverse to lifetime.

What is the difference between a ball screw and a lead screw?
The major difference between lead screws and ball screws is the way in which the load is carried. A ball screw uses recirculating ball bearings in order to minimize friction while, at the same time, maximizing efficiency. A lead screw, on the other hand, depends on low coefficients of friction between sliding surfaces rendering them unable to achieve the same level of efficiency as a ball screw. With applications requiring higher precision and performance, ball screws are used. An example of this would be a CNC machining center. Lead screws are most often used in OEM applications such as drilling machines.

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