ball screws
Since 1958, Thread-Craft has been helping OEMs with their most challenging ball screw needs. We specialize in new design, repair, engineering services, and OEM replacement of precision or rolled ball screws. Our climate controlled plant features all state-of-the-art CNC equipment for turning, milling, precision I.D. and O.D. grinding. We have more than 70 highly skilled, in-house machinists, technicians and engineers to provide the finest linear motion answers available at competitive prices. We provide 24 hour emergency service anywhere in North America. As an ISO 9001:2000 Registered vendor, we guarantee that our OEM replacement parts meet or exceed the quality and reliability standard of the original equipment.
Our precision ground ball screw assemblies feature the following:
 Ball screw- Ball nut
- Return system
- Ball bearings
- High carbon alloy or stainless steel used
Manufactured to the following specifications:
- 10 mm diameter and larger
- Lengths up to 31 ft.
- Virtually any material and any return systems used-made from your sample or print
- Internal and external return systems
- 0.0002 lead error per foot or better upon request
- 12 month in-service warranty
Rolled Thread Ball Screws
 Our commercial ball screw assemblies are for non-precision applications:
- ½" to 4" diameter
- Variety of leads
- 0.005 lead error per foot
- 12 month in-service warranty
OEM Replacement Ball Screws & Acme Retrofit Ball Screws
 ½" to 6" diameter- 2mm to 2" leads
- 0.0005" lead accuracy per foot
- Internal style return system
- External style return system
Lubrication:
Oil - is preferred
Vactra #2 oil is used on smaller machines
Vactra #4 is used on larger machines
Grease
Mobilgrease 28 used for break-in
Kluberplex BEM 34-132 used for lifetime
Ball Screw Life Expectancy Factors:
- Engineering standards
- Accuracy in machining
- Proper installation
- Acceleration and deceleration factors
- Lubrication
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