Ball screws for precise linear motion
Rolled & whirled ball screws 16 to 100 mm
Ball screws are manufactured in-house with high precision to international standards ISO3408 and DIN69051.
Accuracy grades are IT3 suitable for general transport duties, IT5 for positioning and IT3 with machine tool precision. Different pitches from 5 to 40 mm are held on stock for short delivery times. End dimensions can be customised lengths up to 5.7m are possible.
Screw Diameter | 5 | 6 | 10 | 16 | 20 | 32 | 40 |
|---|---|---|---|---|---|---|---|
16 | X | ||||||
20 | X | X | |||||
25 | X | X | X | ||||
32 | X | X | X | X | |||
40 | X | X | X | ||||
50 | X | X | |||||
63 | X | X | |||||
80 | X | X | X | ||||
100 | X |
PRODUCTION AND QUALITY
Two different production processes are used to manufacture accuracy grades IT7 to IT3
Rolling - this is a plastic deformation process where the thread is formed by pressure from large dies. After rolling the screw is hardened and polished. Accuracy grades IT7 and IT5 are possible depending on the screw diameter.
Whirling is a modern machining process that produces accuracy close to grinding but with higher production speed and therefore lower cost. The thread is cut by ceramic tools that are rotated at high speed. The cutting 'chips' take away the heat leaving the screw cool and helping to achieve high accuracy. Whirling produces accuracy grades IT5 and IT3.
The whirling process is established production technology that is regularly used for the manufacture of precision screws. Some suppliers describe their process as grinding when in fact it is whirling because the resultant quality is similar in both cases.
