Mitee-bite 31050 Id Expansion Clamp 950 Lb Mild Steel

Product Description

The MITEE-BITE 31050 is a mild steel internal-diameter (ID) expansion clamp designed to hold workpieces by expanding outward against the inner bore of a part. It delivers 950 lb of holding force and accepts an expansion diameter range of 0.28 to 0.49 inches, making it well-suited for small-bore fixturing applications. The clamp is actuated with an 8-32 center screw and is secured to a fixture plate or tombstone using a 6-32 mounting screw. Machinists and tooling engineers in precision machining and workholding environments specify this style of clamp when external clamping would obstruct the cutting path.

The 31050 is used in CNC machining centers, manual mills, and production fixtures where consistent, repeatable part location is required. The three-mount-hole flange pattern provides stable registration on the fixture surface. Its compact overall height of 0.86 inches keeps the clamp profile low, reducing interference with cutting tools in shallow-clearance setups. Typical applications include small turned parts, bearing bores, and thin-walled components where surface marring from external clamps is not acceptable.

Key Features

• 950 lb holding force for secure grip on small-bore workpieces
• Expansion diameter range of 0.28 to 0.49 inches accommodates a range of bore sizes
• 8-32 center screw actuation for controlled, repeatable expansion
• 6-32 mounting screw secures clamp to fixture plate or tooling surface
• Three mount holes on a 1.17-inch flange diameter for stable, low-profile seating
• Mild steel construction provides durability in production machining environments

Compatibility

Designed as an OEM-style replacement or direct-fit addition for standard ID expansion clamp tooling setups requiring a 0.28 to 0.49 inch expansion diameter range and a 6-32 mounting screw pattern.

Installation Notes

Installation is performed by machinists or tooling engineers. Before installing, ensure the fixture plate is de-energized or the machine is in a safe, locked-out state per shop safety protocols. Thread the mounting screws into the fixture plate, seat the flange flush, then advance the center screw to expand the clamp against the workpiece bore. Do not exceed the rated 3.6 ft/lb actuation torque to avoid damaging the expansion element or the workpiece bore surface.