What is a multi-start thread screw? In general, there is one ball groove in one screw shaft. This is called a “single start thread” screw.When two or more ball grooves are involved, such screws are collectively called “multi-start thread”screws.As the lead becomes larger, the spaces between ball gro Read More

(Accuracy) The difference between the actual distance traveled compared to the theoretical travel based on the lead of the screw. The lead error for a standard screw will not exceed +/-.007” per foot and a premium grade screw will not exceed +/-.003” per foot. Lead error is cumulative based on the actual length of the ballscrew thread. Ref. Class 7-8 ANSI B5.48-1977. Lead charts describing incremental lead deviation offsets can be supplied (upon request). These incremental offsets can be input into motion controllers for lead error compensation. Read More

ALM provides a wide range of ballscrews to satisfy your special requirements.Following is ALM's miniature ball screws' typical application.With rich project experience,I believe we can be of great help to you. Read More