Boneham H568MM Type H Press Fit Headed Drill Bushing

Product Description

The BONEHAM H568MM is a Type H press fit headed drill bushing designed to guide drill bits with precision in jig and fixture applications. It features a 21/32 inch inside diameter and a 7/8 inch body outside diameter, with a length under head of 1/2 inch. The head outside diameter measures 1-7/64 inches and the head height is 1/4 inch. Constructed from steel, this bushing is pressed directly into a drill jig plate and is not renewable. It suits machinists, toolmakers, and production floor technicians who require repeatable, accurate hole placement across high-volume drilling operations.

This bushing is used in drill jig and fixture setups in manufacturing, fabrication, and machine shop environments. It is suited for both light and production drilling applications where consistent hole location is critical. The press fit installation method makes it appropriate for permanent or semi-permanent jig tooling where the bushing does not need to be swapped out between operations. It is a single-piece unit sold individually.

Key Features

• Type H headed design provides a positive stop against the jig plate surface during installation
• Press fit installation method for secure, non-rotating seating in the jig body
• Inside diameter tolerance of +0.0001 to +0.0005 inches ensures close-tolerance drill guidance
• Steel construction provides hardness and wear resistance suitable for repetitive drilling cycles
• Non-renewable design for permanent fixture applications
• Head outside diameter of 1-7/64 inches and head height of 1/4 inch conform to standard Type H dimensional specs

Compatibility

Designed as a standard Type H press fit headed drill bushing for use in drill jigs and fixtures requiring a 21/32 inch inside diameter and 7/8 inch body outside diameter. Compatible with jig plates bored to accept a 7/8 inch press fit bushing per standard tooling practice.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing flush into the jig plate bore. The jig plate bore should be prepared to the appropriate interference fit tolerance before pressing. Never drive the bushing with a hammer directly on the head, as this can distort the ID and compromise drill guidance accuracy. Confirm the bushing is fully seated and flush before use.