Boneham PT285GX Press Fit Headless Drill Bushing

Product Description

The BONEHAM PT285GX is a press fit headless drill bushing manufactured from hardened steel for use in precision drilling and machining operations. With a 15/64 inch inside diameter, a 7/16 inch outside diameter, and a 5/16 inch overall length, this bushing guides drill bits and cutting tools with tight positional accuracy. Hardness is rated at 60 to 65 HRC, providing durability under repeated tooling cycles. The inside diameter tolerance of plus 0.0001 to plus 0.0004 inches ensures consistent fit on standard drill jig fixtures. It installs without a head flange, making it appropriate for flush-mount or close-clearance applications. Machinists and toolmakers install this type of bushing when a permanent, non-renewable jig bushing is required.

This bushing is suited for metal fabrication shops, tool and die operations, and general machining environments where jig drilling requires repeatable hole location. The headless design is used in jig plates where a flush top surface is necessary and the bushing will not be replaced during the service life of the fixture. Industry code P designates this as a standard press fit type per ANSI specifications. Single-unit packaging makes it practical for maintenance, prototype, and low-volume tooling applications.

Key Features

• Press fit installation — no head flange, flush with jig plate surface
• 15/64 inch inside diameter with plus 0.0001 to plus 0.0004 inch tolerance for accurate drill guidance
• 60 to 65 HRC hardened steel construction for extended wear life
• 7/16 inch outside diameter and 5/16 inch overall length — compact profile for tight fixture layouts
• ANSI compliant, Industry Code P designation
• Non-renewable design intended for permanent installation in jig fixtures

Compatibility

Designed for use in standard drill jig fixtures requiring a permanent press fit headless bushing with a 7/16 inch bore and ANSI Industry Code P dimensions.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press — never struck in with a hammer, as this can damage the bore geometry or jig plate. The receiving hole in the jig plate must be machined to the appropriate tolerance for an interference fit before installation. Once pressed in, this bushing is not intended for removal or replacement. Always verify bore diameter and OAL against fixture drawings before pressing the bushing into place.