Boneham H4828LG Press Fit Headed Drill Bushing

Product Description

The BONEHAM H4828LG is a Type H press fit headed drill bushing designed to guide cutting tools with precision in metalworking and fabrication applications. Machined from steel and hardened to 60 to 65 HRC, this bushing provides a durable wear surface that maintains accurate hole placement under repeated drilling cycles. The inside diameter measures 31/64 inches with a tight tolerance of +0.0001 to +0.0005 inches, ensuring consistent tool guidance. The body outside diameter is 3/4 inches, and the length under the head is 1-3/4 inches. It installs by press fit into a prepared jig plate, requiring no additional locking hardware.

This bushing is used in drill jigs and fixtures across production machining, tool and die, and general metalworking environments. The headed design seats flush against the jig plate surface, providing a positive stop that prevents the bushing from being driven through during operation. Typical applications include repetitive hole-drilling operations where positional accuracy is critical across multiple workpieces. This part is a permanent, non-renewable bushing — once pressed in, it is not intended for routine field replacement.

Key Features

• Press fit installation — no locking collar or set screw required
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Hardness of 60 to 65 HRC for extended wear life in high-cycle drilling operations
• Head outside diameter of 59/64 inches with a head height of 7/32 inches for positive seating
• Conforms to ANSI standards for drill bushing dimensions and tolerances
• Non-renewable design — intended as a permanent press fit installation

Compatibility

Designed as a permanent OEM-style press fit drill bushing for use in steel or cast-iron jig plates with a 3/4 inch body bore, conforming to ANSI Type H bushing specifications.

Installation Notes

Installation is performed by machinists or tool and die specialists using an arbor press or hydraulic press. The receiving bore in the jig plate must be precision-reamed to the correct interference fit tolerance before pressing the bushing in. Ensure the jig plate is properly supported to avoid distortion during press-in. This bushing is not removable without machining out the jig plate bore.