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Ball Screws, Ball Nuts and Ball Screw Accessories

  • Ball Screws, ball nuts and accessories
  • End machining on one or both sides
  • 12mm, 16mm, 20mm and 25mm diameter ball screws
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  • Isel ball screws are precision rolled and hardened, ISO Class 7.
  • Available in 12, 16, 20 and 25mm diameters
  • Available with either machined or unmachined ends.
  • Unmachined screws available FROM STOCK in standard lengths of 500mm, 1000mm, 1500mm, 2000mm, 2500mm and 3000mm
  • Custom lengths and custom end machining available for OEM applications - JUST SEND US A PRINT!
  • We offer screws in length up to 3000mm from stock. Need a custom machine end? Please submit a drawing and we will quote it for you. 
  • Ball screw nuts are offered in several different designs and load capacities with and wthout wipers.
  • Accessories for ball nut mounting and end bearing assemblies alow for complete ball screw kit assemlbies to be offered off the shelf.  
Machined Ball Screw Dimensions
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Machined Ball Screw Dimensions


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A ball screw drive is an assembly that converts rotary motion to linear motion very efficiently.  It consists of a ball screw that can be either rolled or ground for more precise applications. A ball nut mounted on the ball screw has recirculating ball bearings located between the outside of the ball nut and the ball screw.  The ball bearings roll in matching ball forms or threads that are on both the ball screw and ball nut.  At the end of a ball circuit on the ball nut, there is a small device that channels the ball bearing back to the beginning of the circuit on the ball nut. The critical fact is that the ball bearings ROLL between the ball screw and ball nut. This compares to an ACME NUT which slides with surface to surface contact between an ACME nut and ACME screw. Because the ball bearings roll, the ball nut moves along the ball screw with very high efficiency, typically greater than 90%. The forces transmitted through the ball screw to the ball nut are distributed over the total number of ball bearings, giving a low relative load per ball comparatively. Thus, the ball nut moves efficiently with very low friction and converts large rotary forces into large linear drive forces very easily because of the number of ball bearings sharing the load.
 

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