Mitee-bite 31150 Id Expansion Clamp Mild Steel 2500 Lb

Product Description

The MITEE-BITE 31150 is a mild steel internal-diameter (ID) expansion clamp designed to grip workpieces from the inside bore outward, delivering 2,500 pounds of holding force across an expansion diameter range of 0.53 to 0.79 inches. The clamp expands radially when the 5/16-18 center screw is tightened, locking the part in place for machining, assembly, or fixturing operations. It mounts to a fixture plate or tombstone via three mounting holes using 6-32 mounting screws. The flange diameter is 1.476 inches with a flange thickness of 0.23 inches and an overall height of 0.98 inches. Machinists and tooling setup technicians are the primary installers of this component.

This clamp is suited for production machining environments where repeatable, low-profile workholding is required on parts with a bore or ID feature in the 0.53 to 0.79 inch range. It is commonly used on CNC machining centers, rotary indexers, and modular fixturing systems where access to the part's outer profile must remain unobstructed. The three-point mounting pattern provides stable seating on flat fixture surfaces. The mild steel construction handles general-purpose workholding loads in standard shop conditions.

Key Features

• 2,500 lb holding force for secure ID gripping during machining operations
• Expansion diameter range of 0.53 to 0.79 inches accommodates a variety of bore sizes
• 5/16-18 center screw drives radial expansion for tool-accessible actuation
• Three-hole mounting pattern with 6-32 mounting screws and 1.14 inch mount hole diameter
• Low-profile design with 0.98 inch overall height and 1.476 inch flange diameter keeps clamp out of cutting paths
• Mild steel construction suitable for general-purpose fixturing applications

Compatibility

Designed as an OEM-style workholding component compatible with modular fixture plates and tombstones that accept a three-hole 6-32 mounting pattern. Suitable for use with workpieces having an internal bore diameter between 0.53 and 0.79 inches.

Installation Notes

Installation is performed by tooling engineers or machinist setup personnel. Before installing or adjusting the clamp, ensure the machine is powered down, the spindle is stopped, and all stored energy is released. Seat the flange flush against the fixture surface and torque the 6-32 mounting screws evenly before engaging the center screw. Do not exceed the rated 27.6 ft/lb actuation torque on the center screw, and verify workpiece seating before initiating a machining cycle.