Boneham H3212GT Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H3212GT is a Type H press fit headed drill bushing manufactured from steel. It is designed to guide drill bits with precision during machining and drilling operations, providing a hardened, accurate bore for repeatable hole placement. The bushing features an inside diameter of 0.228 inches, a body outside diameter of 0.5 inches, and a length under head of 0.75 inches. The head outside diameter measures 0.609 inches (39/64 inches) with a head height of 0.219 inches (7/32 inches). This is a permanent, non-renewable bushing installed by press fit into a jig plate or fixture body and is typically handled by machinists, tool and die makers, or precision fabricators.

The H3212GT is suited for use in drill jigs and fixture plates in manufacturing, maintenance, and production environments. Its headed design seats flush against the jig plate surface, preventing the bushing from being pushed through under drilling load. The steel construction provides durability for repeated drilling cycles. The inside diameter corresponds to wire gauge size Number 1, making it appropriate for guiding drill bits at that nominal diameter in both prototype and production drilling setups.

Key Features

• Press fit installation method for permanent, secure seating in jig plate bores
• Inside diameter of 0.228 inches with a tight tolerance of plus 0.0001 to plus 0.0004 inches for precise drill guidance
• Body outside diameter of 0.5 inches and length under head of 0.75 inches
• Head outside diameter of 0.609 inches and head height of 0.219 inches to resist axial push-through
• Steel construction for wear resistance and durability in repetitive drilling applications
• Non-renewable (fixed) design; intended for permanent installation in the fixture

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for standard Type H headed press fit applications in drill jigs and machining fixtures requiring a 0.228-inch bore and 0.5-inch body outside diameter.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press; hand force alone is not sufficient for proper seating. The receiving bore in the jig plate must be machined to the appropriate interference fit tolerance for the bushing outside diameter before installation. Ensure the jig plate and bushing bore are free of chips and debris prior to pressing. Once installed, this non-renewable bushing is not designed for field removal and replacement without reworking the fixture bore.