Boneham H326GX Press Fit Headed Drill Bushing

Product Description

The BONEHAM H326GX is a Type H press fit headed drill bushing designed to guide cutting tools during precision drilling operations. It features a 15/64 inch inside diameter and a 1/2 inch body outside diameter, with a 3/8 inch length under the head. Manufactured from steel with a hardness rating of 60 to 65 HRC, the H326GX provides consistent hole location accuracy and resists wear under repeated tooling contact. The headed design seats flush against the jig plate surface, stabilizing the bushing and preventing rotation or axial movement during use. This part is a permanent, non-renewable installation intended for fixture and jig applications where drill bushing replacement is not required.

The H326GX is used in metalworking, fabrication, and production drilling applications where accurate hole positioning is critical. It is press fit directly into a pre-bored hole in a drill jig or fixture plate. Typical users include tool and die makers, machinist shops, and production floor technicians working with jig boring setups. The bushing meets ANSI standards, making it suitable for use in environments where dimensional interchangeability and specification compliance are required.

Key Features

• Type H headed design seats against jig plate surface for positive axial retention
• Press fit installation — no set screws or locking mechanisms required
• Steel construction hardened to 60 to 65 HRC for long service life under repeated drilling cycles
• Inside diameter tolerance of +0.0001 to +0.0004 inches for precise tool guidance
• Head outside diameter of 39/64 inch and head height of 7/32 inch for standard jig plate counterbore compatibility
• Meets ANSI standards for drill bushing dimensions and fitment

Compatibility

Designed as an ANSI-standard press fit headed drill bushing for use in drill jigs and fixture plates requiring a Type H bushing with a 15/64 inch bore and 1/2 inch body outside diameter.

Installation Notes

Installation is performed by pressing the bushing into a pre-bored hole in the jig plate using an arbor press or hydraulic press — do not drive with a hammer, as this can damage the bushing bore or distort the outer diameter. Ensure the receiving hole is machined to the correct tolerance for a press fit before installation. The H326GX is a permanent, non-renewable bushing and is not intended to be removed and reused once installed. Follow applicable shop safety procedures and de-energize all equipment before working on fixture assemblies.