Boneham PT285HN Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM PT285HN is a press fit headless drill bushing designed to guide cutting tools with precision in drilling, reaming, and boring operations. Carrying industry code P, this bushing installs without a locking collar or head flange, seating directly into a mating plate or fixture plate by press fit. The inside diameter measures 17/64 inches with a tolerance of +0.0001 to +0.0005 inches, delivering tight tool guidance. The body outside diameter is 7/16 inches and the overall length is 5/16 inches. Hardness runs 60 to 65 HRC, providing the wear resistance required in production jig and fixture work. Machinists, tool-and-die makers, and jig builders install this component as part of drill jig assemblies.

This bushing is suited for use in drill jig plates, fixture bodies, and tooling templates where a permanent, flush-mount bushing is required. The headless profile allows the bushing to sit flush with or below the plate surface, which is useful when clearance above the workpiece is limited. Typical applications include production drilling fixtures in metalworking, fabrication, and machine shop environments. The press fit installation method makes this a non-renewable bushing — it is intended to be permanently installed in the jig body rather than field-replaced under normal production conditions.

Key Features

• Industry code P headless profile for flush or sub-flush installation in drill jig plates
• Inside diameter of 17/64 inches with a tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Body outside diameter of 7/16 inches and overall length of 5/16 inches
• Hardness rated 60 to 65 HRC for extended wear life in production drilling applications
• Press fit installation method — no locking collar or head required
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an ANSI-standard P-type press fit headless drill bushing for use in drill jig plates and fixture assemblies machined to accept a 7/16 inches outside diameter press fit bushing seat.

Installation Notes

Installation is performed by a machinist or tool-and-die maker using an arbor press or hydraulic press to drive the bushing into a properly toleranced bore in the jig plate. The receiving bore must be machined to the correct press fit tolerance before installation to avoid bushing damage or distortion of the inside diameter. Because this is a non-renewable bushing, removal typically damages the component and requires replacement. Ensure the jig plate material and bore finish meet ANSI jig bushing specifications before pressing in place.