Boneham PT3612IM Headless Drill Bushing 5/16 in Id Steel

Product Description

The BONEHAM PT3612IM is a press fit headless drill bushing designed to guide cutting tools with precision in jig and fixture applications. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing delivers consistent bore alignment and resists wear under repeated drilling cycles. The headless design sits flush with the jig plate surface, making it well suited for applications where a protruding head would interfere with workpiece clearance. With an inside diameter of 0.3125 inches and an outside diameter of 9/16 inches, the PT3612IM conforms to ANSI standards for Type P press fit bushings.

This bushing is used in production drilling, reaming, and boring fixtures across metal fabrication and machining operations. The press fit installation method allows the bushing to be driven directly into a prepared hole in the jig plate without a locking collar or additional hardware. At 3/4 inches overall length, it provides adequate bearing surface for straight-shank tooling in moderate-depth drilling setups. Machinists and toolmakers install this component during fixture assembly or as a replacement in existing jig plates.

Key Features

• ANSI-compliant Type P press fit bushing for standardized jig and fixture use
• 60 to 65 HRC steel construction resists wear and deformation under sustained drilling loads
• Headless design sits flush with jig plate surface for unobstructed workpiece positioning
• Inside diameter tolerance of +0.0001 to +0.0005 inches ensures accurate tool guidance
• Non-renewable design for permanent press fit installation without locking hardware

Compatibility

Designed as an ANSI-standard Type P press fit headless drill bushing for use in machined jig plates with a prepared 9/16 inch bore diameter.

Installation Notes

Installation is performed by a machinist or toolmaker using an arbor press or bushing driver to seat the bushing flush into a precisely reamed hole in the jig plate. The receiving bore should be machined to the appropriate interference fit tolerance before installation. Do not hammer the bushing in freehand, as this can damage the bore alignment or the bushing face. Power down all associated machinery before servicing or replacing bushings in an active fixture.