Boneham P4012IM Headless Drill Bushing 5/16 in Id Steel

Product Description

The BONEHAM P4012IM is a press fit headless drill bushing used to guide cutting tools with precision in jig and fixture applications. Manufactured from steel with a hardness of 60 to 65 HRC, this bushing resists wear during repetitive drilling operations. It features a 5/16 inch inside diameter, a 5/8 inch body outside diameter, and a 3/4 inch overall length. The headless design sits flush with the jig plate surface, making it well suited for applications where a protruding head would interfere with workpiece positioning or clamping. It is permanently installed via press fit and is not designed for field replacement without machine shop equipment.

This bushing is used in production drilling, reaming, and boring operations where consistent hole location is critical. Typical applications include metal fabrication shops, toolrooms, and manufacturing cells running moderate to high production volumes. The ANSI-compliant geometry ensures dimensional interchangeability with standard jig plate designs. Machinists, tool and die makers, and fixture builders are the primary installers. It is sold individually, making it a practical option for single-position jig repairs or prototype fixture builds.

Key Features

• Press fit installation method for permanent, non-renewable positioning
• Headless design sits flush with jig plate surface to clear workpieces and clamps
• 60 to 65 HRC steel construction for high wear resistance under repeated tool passes
• Inside diameter tolerance of plus 0.0001 to plus 0.0005 inches for close-tolerance tool guidance
• ANSI-compliant geometry for standard jig and fixture interchangeability
• Bushing Industry Code P for straightforward catalog cross-reference

Compatibility

Designed as an OEM-style replacement or new-build component for standard ANSI jig plates and drill fixtures requiring a press fit headless bushing with a 5/16 inch inside diameter and 5/8 inch body outside diameter.

Installation Notes

Press fit bushings require an arbor press or hydraulic press for proper installation into the jig plate bore. The receiving bore must be machined to the appropriate interference fit tolerance before installation. Do not drive the bushing with a hammer, as this risks misalignment and damage to the bushing bore. Once pressed in, this bushing is not intended for removal or reuse.