Mitee-bite 31000 Id Expansion Clamp 250 Lb Mild Steel

Product Description

The MITEE-BITE 31000 is a mild steel internal-diameter (ID) expansion clamp designed to grip workpieces from the inside bore. It expands from 0.16 inches to 0.29 inches to secure parts during machining, assembly, or fixturing operations. The clamp delivers 250 pounds of holding force when the 2-56 center screw is tightened to the specified torque. A three-hole flange base with a 0.787-inch flange diameter and 0.54-inch mount hole diameter allows rigid mounting to a fixture plate or work surface. Machinist and toolroom technicians install this clamp in precision workholding setups where external clamping would obstruct toolpaths.

The MITEE-BITE 31000 is suited for light-duty workholding in machining centers, milling fixtures, and assembly jigs where bore diameters fall within the 0.16-inch to 0.29-inch expansion range. Its compact overall height of 0.42 inches keeps the clamp profile low, making it practical for thin-section workpieces or fixtures with limited vertical clearance. The mild steel construction is appropriate for general shop environments. The 2-56 mounting screw thread size is consistent with small-scale precision fixturing hardware commonly found in toolrooms and production machining cells.

Key Features

• ID expansion range of 0.16 to 0.29 inches suits small-bore workholding applications
• 250 pounds of holding force from a 2-56 center screw actuation
• Low-profile design at 0.42 inches overall height reduces fixture interference
• Three-hole flange base provides stable, repeatable mounting to fixture plates
• Mild steel construction offers reliable performance in general machining environments
• 0.54-inch mount hole diameter and 2-56 mounting screw thread size for precise fixture integration

Compatibility

Designed as an OEM-style replacement or direct-fit component for small-bore ID expansion workholding fixtures requiring a 0.16-inch to 0.29-inch expansion diameter and 2-56 screw thread interface.

Installation Notes

Installation is typically performed by a machinist or toolroom technician. Secure the flange base to the fixture plate through the three mount holes using the 2-56 mounting screws before engaging the center screw. Confirm the workpiece bore is clean and free of burrs before expanding the clamp to avoid uneven load distribution. Do not exceed the rated 0.50 ft/lb actuation torque on the center screw, as overtightening can damage the clamp or distort the workpiece bore.