Boneham H405KK Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H405KK is a Type H press fit headed drill bushing designed to guide cutting tools accurately during drilling, reaming, and related machining operations. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing delivers consistent bore alignment and long service life in production jig and fixture applications. The 27/64 inch inside diameter and 5/8 inch body outside diameter suit common tooling setups, while the headed design provides a positive stop against the jig plate surface. Machinists and tool-and-die professionals install this bushing type as a permanent, non-renewable liner in drill jigs.

The H405KK is intended for use in drill jig fixtures where a press fit, non-renewable bushing is required. The headed configuration prevents the bushing from being pushed through the jig plate under thrust loads. With a 5/16 inch length under head, it suits standard jig plate thicknesses encountered in light to medium production machining environments. This part is appropriate for job shops, production facilities, and toolroom applications requiring precise hole location repeatability.

Key Features

• Press fit installation — no locking mechanism required, installs permanently into the jig plate
• Headed design provides a positive axial stop against the jig plate face
• Steel construction with 60 to 65 HRC hardness for wear resistance under repeated tool passes
• Inside diameter tolerance of +0.0001 to +0.0005 inches for close-tolerance tool guidance
• Conforms to ANSI standards for drill bushing dimensions and interchangeability
• Non-renewable design — intended as a fixed, long-term installation

Compatibility

Designed as an ANSI-standard Type H press fit headed drill bushing for use in drill jig fixtures requiring a 27/64 inch inside diameter and 5/8 inch body outside diameter press fit seat.

Installation Notes

Press fit bushings are typically installed by a toolmaker or machinist using an arbor press, ensuring the bushing is driven squarely into the jig plate bore without cocking. The receiving bore in the jig plate must be machined to the correct interference fit tolerance prior to installation. Once pressed in, this bushing is not intended for removal or replacement. Always verify jig plate material hardness and bore finish before installation to ensure proper retention.