Boneham P6412MH Press Fit Headless Drill Bushing

Product Description

The BONEHAM P6412MH is a press fit headless drill bushing used to guide drill bits and cutting tools with precision in metalworking and machining operations. It carries an inside diameter of 0.625 inches with a tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 1.000 inches, and an overall length of 0.75 inches. Manufactured from steel and hardened to 60 to 65 HRC, this bushing maintains tight dimensional control during repetitive drilling cycles. It installs permanently into a jig plate without a head flange, making it suited for flush-mount applications where a protruding flange would interfere with workpiece clearance. Machinists, tool and die makers, and jig builders are the primary installers.

This bushing is used in drill jigs, fixture plates, and production tooling setups where consistent hole location accuracy is required across multiple workpieces. The headless body style is preferred when the bushing must sit flush with the jig plate surface. Typical applications include production drilling, reaming guide, and light boring in both job shop and high-volume manufacturing environments. The press fit installation method means the bushing is driven into the jig plate bore and is not intended for field removal or replacement once installed.

Key Features

• Inside diameter of 0.625 inches with a precision tolerance of +0.0001 to +0.0005 inches for accurate tool guidance
• Hardened steel construction at 60 to 65 HRC for wear resistance during repetitive drilling cycles
• Headless design allows flush installation in jig plates where flange clearance is not available
• Press fit installation method provides a permanent, secure seat in the jig plate bore
• Meets ANSI standards for drill bushing dimensions and tolerances
• Non-renewable design — intended as a fixed, permanent jig component

Compatibility

Designed as an ANSI-standard press fit headless drill bushing of Industry Code P, compatible with jig plates and fixture tooling bored to accept a 1.000-inch outside diameter press fit bushing.

Installation Notes

Installation is performed by tool and die makers or machinist trades using an arbor press or hydraulic press to drive the bushing into a precision-bored jig plate hole. The receiving bore in the jig plate must be machined to the correct press fit tolerance before installation. Once pressed in, the bushing is not designed for removal and reuse. Verify bore alignment and bushing orientation before pressing to final depth.