Barnes Ball Screw Reconditioning

Barnes Ball Screw Reconditioning We specialize in reconditioning all types of ball screw assemblies with internal or external ball return systems. To determine the cost of reconditioning a ball screw, it should be shipped prepaid to Barnes Industries for a no-charge inspection. Proper inspection requires complete disassembly of the unit. After the disassembly, the ball screw and ball nut raceways are checked for wear as well as metal fatigue. In addition, screw journals, snap ring grooves, V-threads, and keyways are also inspected. The ball screw, if in good condition, is inspected for straightness and lead accuracy. Our detailed inspection of the failed ball screw assembly often pinpoints serious application or installation problems with the machine tool. After the initial inspection, our team will contact you for a purchase order approval before carrying out any operation.

Our regrinding process is economically feasible for servicing all types of damaged ball screws. New nuts for reconditioned ball screws can be made with the original mounting configurations. In most cases, the Barnes new nuts have increased load carrying capacities, which in turn ensure the longevity of the ball screw. In cases where the ball screw cannot be reconditioned, we custom manufacture a new replacement ball screw. We have a complete range of in-house tooling, thread grinding, milling, turning, straightening, lead checking, and inspection equipment to recondition or manufacture new ball screws with diameters up to 6" and lengths over 70'.

Several machine tool manufacturers recommend our services for reconditioning their customers damaged ball screw assemblies.

With a commitment to provide dedicated solutions for your unique needs, Barnes adopts a step- by-step ball screw reconditioning process, which involves:

1. ) Visual inspection of worn nut.		2. ) Optical checking of worn lead screw thread radius to determine radius wear and deformation.

3. ) Grinding lead screw ball raceway in a Matrix 70 thread grinder.		4. ) Straightening of ball lead screw before lead check.

5. ) Checking thread lead in master V-block.		6. ) Pre-cutting internal ball thread raceway in new ball nut before heat treatment.

7. ) Inspecting timing of ball thread return holes with ball thread raceway before heat treatment.		8. ) Checking hardness on ball nuts after heat treatment.

9. ) Grinding ball thread raceway in new ball nut.		10. ) Optical checking of reground lead screw thread radius to new engineered specifications.

11. ) Inspecting radial clearance to determine ball contact angle.		12. ) Checking drag force and running condition on flange-type nut assembly.

13. ) Checking journal concentricity to pitch diameter of ball screw, by rotating screw through nut.		14. ) Testing axial deflection between nut and ball screw to determine point at which preload is relieved.

15. ) Checking a flanged nut for squareness to the screw axis, and journal concentricity to the screw major diameter.		16. ) Checking lead screw centerline, and centerline angularity on a reconditioned lead screw.

Send your worn or damaged ball screw assembly to Barnes industries for a no-charge inspection and see what Barnes can do for you.

Portfolios

Specifications:

Materials	Alloy Steel Hardened Steel Stainless Steel
Services	Thread Grinding Cylindrical Grinding Straightening Regrinding Lapping Honing Induction Hardening Flame Hardening Furnace Tempering Turning Milling Reconditioning Thread Whirling Deflection Testing Lead Inspection Inspection and Testing
Special Services	Design Assistance Re-engineering Emergency Reconditioning Reload and Minor Reconditioning Repair Broken Journals Detailed inspection of failed ball screw assemblies Diagnose machine tool discrepancies leading to failure Pinpoint ball screw application errors Identify alignment related premature ball screw failures
Maximum Screw Diameter	6" (Larger sizes can be handled upon request)
Maximum Screw Length	70' (Longer lengths can be handled upon request)
Screw Lead Accuracy (Tolerance)	Reloaded Ball Screws: Customers will be notified of lead accuracy. Ball screws Reconditioned by Lapping: Customers will be notified of lead accuracy. Ball screws Reconditioned by Regrinding: ±0.0005" per Foot, Cumulative
Precision Ball Diameter Tolerance	+/-0.000025" (Grade 25)
Price	The cost of reconditioning required for your ball screw assembly is determined from a no-charge inspection. When the type of servicing and costs are determined, the customer is notified with a written report/quotation for a purchase order approval before any other operations are carried out.
Delivery	Backed by the support of our experienced staff and state-of-the-art equipment, we provide fast delivery time on all our reconditioned ball screws to reduce customer downtime to a minimum. Delivery time is determined by the size of the screw and the extent of the damage. Expedited service is available in many cases.
Warranty	Barnes Reconditioned ball screws are given an in-service warranty. For our lapped ball screws, we provide a warranty of 12 months. For reground ball screws, we provide a warranty of 15 to 18 months. (Ball screw raceway hardness must be Rc-58 minimum for full 18-month warranty to apply.)
Service Advantages	Industry pioneer for ball screw service No-charge initial inspection Fast turn-around time Engineered to a high load capacity and life rating All our ball screws are tested and preloaded to manufacturers' specifications Complete in-house machinery to recondition ball screws of any size and design Unequaled ball screw design and equipment engineers on staff
Grinding Equipment	Thread Grinders: MATRIX 70, Mitsui-Seiki, Excello, Jones & Lamson
Standards Met	Ball Screw Standards: ANSI, ISO, DIN, and JAS American Bearing Manufacturers Association's (ABMA's) Class ABEC-5 Standard
Industries Served	Aerospace Aircraft Agriculture Automotive Defense Furniture Machine Tool Machine Tool Rebuild Material Processing Nuclear Power Generation
Partial Client List	Baker Oil Boeing Caterpillar Chrysler Dainichi Machinery GE Aircraft Engine General Dynamics GM Hess Industries Hewlett-Packard Honda Honeywell John Deere Mitsubishi Parker Hannifin Peiffer Machine Solar Turbines Spirit AeroSystems The Daniluk Corp. Toyota Vought