Start with the original CNC ball screw reference
Find the assembly number or machine parts drawing. Record the overall length and nominal diameter, together with the lead, nut design and shaft end machining. Include the machine model if the reference is unclear.
What is ball screw lead?
Lead is the distance the ball nut travels in one full revolution of the screw when the nut is prevented from rotating. For example, a screw specified as 25 mm nominal diameter with a 5 mm lead gives 5 mm travel per revolution. Record both values.
What should I check on the ball nut and shaft ends?
Copy the nut model and record the flange shape and mounting hole pattern. Include drawings of both machined ends showing bearing seats, shoulders and threads. State whether you need a complete ball screw assembly or a replacement ball nut. A matching diameter and lead alone do not establish nut compatibility.
Rolled vs ground ball screws
Copy the specified accuracy grade and preload. If the original drawing calls for a rolled or ground ball screw, include that too. Manufacturing method, lead accuracy and geometrical tolerances can differ.
Looking to buy a HIWIN ball screw in Chennai?
Share the make, complete designation, quantity and shaft drawing with South India Bearing Co. If all you have is a worn sample, tell us which details are missing. We can check the enquiry against the manufacturer reference.
Related products and catalogues
Browse the relevant South India Bearing Co. product pages for range details, manufacturer catalogues and quotation enquiries.