Ball Screw Reload, Minor Repair and Emergency Services

Barnes Industries specializes in emergency ball screw services that will reduce a customer’s machine downtime to an absolute minimum. We have the largest selection of sizes of ball bearings of any ball screw company in the world, with .0001 inch increments for nearly all standard sizes of metric and English ball bearings.
This insures the possibility of a reload or minor repair for any manufacturers ball screw received. We also have on hand a large supply of original salvaged usable parts from major U.S. and foreign ball screw manufacturers. These parts are available for emergency repairs only and are never used in our full reconditioning process. We have the machining facilities to expedite the remanufacture of any original ball screw components that may have been damaged beyond use. Qualified, experienced engineers and technicians provide the know how to round out the team required to give the fastest expedited ball screw service in the industry, including overnight and same-day turnaround in many instances.

In certain cases, a minor wear condition can be corrected properly by reloading the nut and screw with over-sized balls. This reloading procedure is carried out only if the following conditions are met:

• The ball screw and nut thread raceways are in good condition
• The ball screw and nut raceway radii and root diameters are in tolerance for the ball that is to be used in reloading. This insures that the ball conformity and contact angle are correct.
• The ball screw thread root diameter must be straight or require minimal lapping.
• The ball screw thread lead must be within machine tool tolerance. Customer approval is required if lead is out of tolerance.

If these four critical conditions are met, the ball screw can be reloaded and given a 6-month warranty.

Sometimes on integral preloaded nuts (even in good condition), an oversized ball used to offset wear and to establish preload will not run at the proper contact angle. This results in a short wear life and the reload procedure is not carried out. If the screw thread radius and root diameter are not out of tolerance, then they could be polished (or lapped) and proper reconditioning would require a new ball nut only, which is given a 12-month warranty.

Bearing journals that are undersized, scored, damaged or bent are repaired by a process determined by inspection. Repaired journals meet ABMA specifications for class ABEC-5 or better.
Bearing journals that have been broken off can be repaired by a special process. Ship ball screw and journal pieces to us. We will engineer and install a new journal that meets ABMA specifications.

Barnes Industries also offers an option on an emergency basis to make your original unit functional, if possible, and at the same time a drawing can be made and quoted for the manufacture of a new screw with an expedited delivery. We also have an inventory program where we keep ball screw assemblies in stock for immediate delivery for major machine tool manufacturers. With our 40 plus years of experience in engineering and manufacturing of ball screws, Barnes Industries is the only ball screw service that fully analyzes and applies the load-life calculations to all its services offered.

Portfolios

Extra Long Ball Screw Reconditioning of Buttress Screws High Load Capacity Ball Screw

Specifications:

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