Thread-Craft, Inc.
ANABISO 9001:2008 & AS9100:2009 Rev C Registered

Expedited Delivery of Precision CNC Machine Tool Ball Screw Assembly

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Thread Craft was contracted by JL Lucas, a customer in the precision machine tool remanufacturing industry, to fabricate 4 precision ball screws crucial to their business. This order was about doing whatever necessary to help a customer with a critical deadline. A tremendous amount of machining needed to be completed in 4 weeks, including lathe work, OD grinding, milling, v-threads and of course precision internal and external thread grinding. Lead accuracy tolerances of ±.0002" per foot were held. Our internal expedite specialists managed every operation from heat treat through all testing and final inspection. These ball screw assemblies were very particular and unique, not available off the shelf and subsequently very difficult to manufacture.

This project was completed in 3 weeks at our state of the art, ISO 9001: 2008 certified facility, and shipped to the client in Waterbury, Connecticut. Thread Craft specializes in custom designing and machining of ball screw assemblies, as well as emergency repair service. For more about this ball screw machining project or our other capabilities please see the table below or contact us directly.

Precision CNC Machining of an Alloy Steel Ball - Screw Assembly
Precision CNC Machining of an Alloy Steel Ball Screw Assembly

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Highlights of this CNC Ball Screw Project

Product Description These ballscrews are used in precision machinery remanufacturing.
Precision CNC Machining Capabilities Applied/Processes Primary:
Emergency Repair
  • Grind
  • Milling
  • V-thread
  • Keyway

Heat Treating
Equipment Used to Manufacture Part Saw, Lathe, Mill, ID Grinder, OD Grinder, External V-Thread Grinder, Internal Ball Thread Grinder, External Ball Thread Grinder
Overall Part Dimensions 2.25" Diameter x 24.63" long
Tightest Tolerances ±.0002"
Material Used Screw shaft: 4150 Alloy Steel
Ballnut: 8620 Alloy Steel
Ball Bearings: 52100 Alloy Steel
Material Finish Polished, No special coatings
Components Screw shaft
Ball Bearings
In process testing/inspection performed Inspections, Heat Treats, Concentricity, Preload
Industry for Use Precision Machining Industry
Volume 4
Delivery/Turnaround Time 3 Weeks
Delivery Location Waterbury, Connecticut
Standards Met Customer Specifications, 2D CAD Drawing
ISO 9001: 2008
Product Name Precision Ball Screw Assembly

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