Boneham PT285HL Press Fit Headless Drill Bushing

Product Description

The BONEHAM PT285HL 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 of 60 to 65 HRC, this bushing resists wear and maintains accurate hole alignment under repeated drilling cycles. It features an inside diameter of 0.261 inches (Letter size G, Wire size P) and a body outside diameter of 7/16 inches, with an overall length of 5/16 inches. The headless design allows flush seating in close-tolerance applications where a flanged head would interfere with workpiece clearance. Machinists, tool and die makers, and precision fabricators install this component in production jigs and drill fixtures.

This bushing is suited for use in production and prototype drilling fixtures where consistent hole location is required across multiple workpieces. Its press fit installation method means it is driven directly into a reamed hole in the jig plate and retained by interference fit rather than a locking collar or liner bushing. Typical applications include metalworking, precision fabrication, and manufacturing environments where tight positional tolerances must be held over high-cycle runs. The non-renewable design makes it a cost-effective choice for fixed, dedicated tooling setups.

Key Features

• Inside diameter of 0.261 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 for compact fixture integration
• Steel construction hardened to 60 to 65 HRC for long service life in high-cycle drilling applications
• Headless design allows flush installation where head clearance is limited
• Press fit installation method eliminates the need for a liner bushing or locking collar
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an OEM-style replacement or direct-fit component for drill jigs and fixtures requiring a headless press fit bushing with a 0.261 inches inside diameter and 7/16 inches outside diameter per ANSI standards.

Installation Notes

Installation is typically performed by tool and die makers or fixture builders using an arbor press to drive the bushing into a precision-reamed hole sized to match the bushing outside diameter interference fit requirement. Ensure the jig plate bore is reamed to the correct dimension before pressing to avoid bushing damage or misalignment. Because this is a non-renewable bushing, replacement requires pressing out the worn bushing and reaming the bore for a replacement or oversized unit if wear has occurred. Always de-energize or lock out any machine the fixture is mounted to before servicing tooling components.