Minor Ball Screw Repair
Minor Ball Screw Repair and Reload Services
Barnes Industries specializes in minor ball screw repair reload 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 ensures the possibility of a reload or minor repair for any manufacturer's 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 ball screw reconditioning process. We have the machining facilities to expedite the re-manufacture 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.
Minor Ball Screw Repair Service
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 ensures 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 up to a 6-month warranty.
Ball Screw Reload
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.
The ball screw is cleaned and completely inspected (See inspection procedure under Ball Screw Reconditioning). Bearing journals are inspected for proper size and critical runout and concentricity to the screw diameter. If the bearing diameters are worn, they need to be corrected for the ball screw to function properly in the machine tool.
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 and we will engineer and install a new journal that meets ABMA specifications.
Portfolio
Reconditioning of Large Buttress Screw
Specifications
Materials |
Alloy Steel |
Services |
Thread Grinding |
Special Services |
Design Assistance |
Maximum Screw Diameter |
6" (Larger sizes can be handled upon request) |
Maximum Screw Length |
52' (Larger sizes can be handled upon request) |
Screw Lead Accuracy (Tolerance) |
Reloaded Ball Screws: |
Precision Ball Diameter Tolerance |
+/-0.000025" (Grade 25) |
Price |
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Delivery |
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Warranty |
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Grinding Equipment |
Thread Grinders: MATRIX 70, Mitsui-Seiki, Excello, Jones & Lamson |
Standards Met |
American Bearing Manufacturers Association's (ABMA's) Class ABEC-5 Standard |
Industries Served |
Aerospace |
Partial Client List |
Baker Oil |
Call 248.541.2333 Today visit our faq page for more information