Mitee-bite 31370 Id Expansion Clamp Steel 4000 Lb

Product Description

The MITEE-BITE 31370 is a steel internal-diameter (ID) expansion clamp designed to grip workpieces from the inside bore during machining, fixturing, and workholding operations. The clamp expands from 0.71 inches to 2.09 inches in diameter, accommodating a range of bore sizes in a single unit. It delivers 4,000 pounds of holding force at a torque setting of 49 ft/lb, making it suitable for high-demand production environments. With an overall height of 1.75 inches and a six-hole mounting flange, it integrates into standard tooling plates and fixture bases. Machinists and tooling engineers are the primary installers of this type of workholding hardware.

The MITEE-BITE 31370 is used in machining centers, mill fixtures, and precision workholding setups where external clamping is impractical or would interfere with toolpaths. It is well suited for both production runs and short-run fixture work involving cylindrical or bored workpieces. The 2.1-inch flange diameter and 1-inch mount hole diameter allow it to mount directly to tooling plates, subplates, or dedicated fixture bodies using six fastener positions for a secure, repeatable seating arrangement.

Key Features

• Expansion diameter range of 0.71 to 2.09 inches accommodates a wide variety of bore sizes
• 4,000 lb holding force provides secure clamping under heavy cutting loads
• 49 ft/lb actuation torque for consistent, repeatable clamp engagement
• Six-hole mounting flange with 1-inch mount hole diameter for stable fixture integration
• Steel construction for durability in machine shop environments
• Compact 1.75-inch overall height minimizes fixture stack-up

Compatibility

Designed as an OEM-style workholding component compatible with standard tooling plates, subplates, and fixture bodies that accept a six-hole bolt pattern with a 2.1-inch flange diameter and 1-inch mount holes.

Installation Notes

Installation is performed by machinists or tooling engineers. Power down and lock out all machine axes before mounting or removing the clamp from a fixture. Use a calibrated torque wrench to achieve the specified actuation torque consistently — do not exceed rated torque, as over-tightening can damage the expansion mechanism. Verify bore diameter falls within the 0.71 to 2.09 inch rated expansion range before actuation.