lead screws - acme screws - roller screws

Lead screws (or acme lead screws) are another specialty at Thread-Craft. We engineer and manufacture both inch and metric lead screw assemblies in right and left hand versions. We deliver precision ground screws for higher accuracy and longer life and expertly manufacture single and multiple starts for most alloy and stainless steel lead screws.

• Standard diameters ¼" (6.35mm) to 6" (152.4mm)
• Special diameters up to 10" (254mm)
• Standard leads from 0.050" (1.27mm) up fontto 1" (25.4mm)
• Repeatable positioning accuracy
• 0.0003 inches - up to 2.75 diameter
• 0.0006 inches - 3 inch diameter and up
• Bronze, alloy or plastic nuts

Thread-Craft can reverse engineer your lead screw and nut from your original sample and manufacture a new lead screw assembly, or regrind your lead screw and manufacture a new lead nut to fit perfectly. Contact Thread-Craft for the highest quality lead screws.

Please provide us these four variables to determine the correct acme screw or lead screw for your application:

1. Load-measured in pounds or newtons
2. Speed data - in inches or millimeters per minute
3. Length-distance between bearings measured in inches or millimeters
4. End Fixity-refers to the method by which the ends of the screw are supported. The three basic types of end fixity are: Free-no support; Simple-shaft supported at a single point; Fixed-shaft rigidly restrained against axial rotation.

1. Bronze, alloy & plastic nut material
2. Efficiency
3. Flange
4. Load capacity
5. Torque to raise