Gibraltar 20401G 52 Piece Step Block Clamp Set

Product Description

The GIBRALTAR 20401G is a 52-piece step block and clamp set designed for workholding and fixturing operations on milling machines, drill presses, and other machine tool setups. The set includes step blocks, clamps, studs, nuts, and washers sized to work with a 9/16 inch T-slot and a 1/2-13 stud thread. Step blocks have a 1 inch width. Stud lengths range from 3 inches through 8 inches, giving the user flexibility across a variety of workpiece heights and setups. The full set weighs 24 pounds. It is sold as a single package with a quantity of 1.

This set is used in machine shop environments for securing workpieces directly to the table of a milling machine, boring mill, or similar equipment. It is suited to both production and job-shop settings where a complete, ready-to-use fixturing kit is needed. The range of stud lengths — 3, 4, 5, 6, 7, and 8 inches — allows the set to handle varied workpiece geometries without requiring additional hardware. Licensed machinists and tool room technicians are the primary installers and users of this type of fixturing hardware.

Key Features

• 52-piece complete set includes step blocks, clamps, studs, nuts, and related hardware
• 1 inch step block width for consistent workholding engagement
• 9/16 inch T-slot compatibility fits common milling machine table slots
• 1/2-13 stud thread for secure clamping force
• Six stud length options: 3, 4, 5, 6, 7, and 8 inches to accommodate varied workpiece heights
• 7/8 inch nut width across the set

Compatibility

Designed for use with machine tool tables equipped with 9/16 inch T-slots. Confirm T-slot width and stud thread requirements on the specific machine before installation.

Installation Notes

Installation is performed by qualified machinists or tool room personnel. Before setting up a workholding configuration, confirm the machine table is de-energized and the spindle is fully stopped. Verify that stud length selected does not allow the stud to bottom out in the T-slot before the clamp reaches proper clamping force against the workpiece. Follow the machine manufacturer guidelines and applicable shop safety standards when configuring fixturing setups.