Boneham H4822KI Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H4822KI is a Type H press fit headed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Machined from steel, this bushing features a 0.413 inch inside diameter, a 3/4 inch body outside diameter, and a 1-3/8 inch length under the head. The head outside diameter measures 59/64 inch with a head height of 7/32 inch. Press fit installation seats the bushing permanently into a drill jig plate without the use of lock screws or liner bushings. Machinists, toolmakers, and fixture builders rely on this style for high-volume drilling operations where a fixed, non-renewable bushing is acceptable.

This bushing is suited for use in production drilling jigs in both industrial and job-shop environments. The headed design provides a positive stop against the jig plate surface, controlling the depth at which the bushing seats and helping to resist axial push-out forces during repeated tool passes. The Type H designation follows standard drill bushing industry coding, making it a direct fit for jig plates engineered to that specification. Inside diameter tolerance is held at +0.0001 to +0.0005 inch, ensuring close guidance of letter-size Z drills and equivalent tooling.

Key Features

• Press fit installation method seats permanently into the jig plate bore
• Steel construction provides wear resistance for repetitive drilling cycles
• Inside diameter tolerance of +0.0001 to +0.0005 inch for precise tool guidance
• Headed design acts as a positive stop against the jig plate face
• Non-renewable fixed bushing — no liner bushing or lock screw required
• Inside diameter designated letter size Z (0.413 inch decimal)

Compatibility

Designed as an OEM-style press fit headed drill bushing conforming to Type H industry standards for use in drill jig plates bored to accept a 3/4 inch outside diameter press fit bushing.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press to drive the bushing into a precision-bored jig plate hole. The jig plate bore must be machined to the correct press fit tolerance before installation. Once pressed in, this bushing is not intended for removal or replacement. Always verify bore diameter and alignment before pressing to avoid bushing damage or jig plate distortion.