Gibraltar 20403G 52 Piece Step Block Clamp Set

Product Description

The GIBRALTAR 20403G is a 52-piece step block and clamp set designed for workpiece fixturing on milling machines, drill presses, and similar metalworking equipment. The set includes step blocks, clamps, T-slot bolts, nuts, and studs that work together to secure parts to machine tables during machining operations. Step blocks are 1 inch wide, T-slot size is 11/16 inch, and stud thread is 1/2-13. Stud lengths range from 3 inches through 8 inches, providing flexibility across a wide variety of workpiece heights and setups. At 24 pounds, the set is substantial enough for repeated heavy-duty fixturing use in a production or job shop environment.

This set is suited for machinists and toolroom technicians working in manual or CNC milling environments who need a complete, ready-to-use fixturing solution. The range of stud lengths — 3, 4, 5, 6, 7, and 8 inches — makes the set practical for both shallow and tall workpieces without requiring supplemental hardware. The 11/16-inch T-slot sizing fits a common table slot dimension found on a wide range of knee mills and vertical machining centers.

Key Features

• 52-piece set includes step blocks, clamps, studs, and nuts for complete fixturing capability
• 1 inch step block width for consistent, stable clamping contact
• 11/16 inch T-slot fit accommodates standard machine table slots
• 1/2-13 stud thread for reliable engagement under cutting loads
• Six stud lengths — 3, 4, 5, 6, 7, and 8 inches — cover a broad range of workpiece heights
• 24-pound set weight reflects robust, production-grade construction

Compatibility

Designed for use with machine tables featuring 11/16 inch T-slots, which are a standard dimension on many vertical knee mills and drill press tables. Confirm T-slot dimensions on the target machine table before installation.

Installation Notes

Installation is performed by machinists or toolroom personnel as part of standard workholding setup. Power down and de-energize the machine before configuring any fixturing on the table. Clamps should be positioned to avoid interference with tool paths, and studs should be threaded fully into the T-slot nuts before applying clamping torque. Inspect all components for wear or damage before each use.