Boneham H328FT Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H328FT is a Type H press fit headed drill bushing manufactured from hardened steel for precision drill guidance in metalworking and machining operations. With an inside diameter of 0.1875 inches and a body outside diameter of 0.5 inches, this bushing accepts standard 3/16-inch drill shanks and installs permanently into a jig plate or fixture body without a locking collar. The head outside diameter measures 39/64 inches and the head height is 7/32 inches, providing a positive seating surface against the fixture face. Hardness runs 60 to 65 HRC throughout. Machinists and tool-and-die professionals install this bushing type when a non-renewable, fixed-location guide is required for repeatable hole placement.

This bushing suits production drilling, reaming, and boring applications in machine shops, fabrication facilities, and toolroom environments. It is used in jig-and-fixture setups where a drill bushing must be permanently pressed into the jig plate and remain in place for the life of the fixture. The headed design seats flush against the plate surface and resists axial push-through under drilling load. Typical applications include fixture plates in light to medium production runs on steel, aluminum, and similar workpiece materials.

Key Features

• Press fit installation — no locking collar or liner bushing required
• Headed (Type H) design seats against fixture face and resists axial push-through
• 0.1875-inch inside diameter with a tight tolerance of +0.0001 to +0.0004 inches for precise drill guidance
• Hardened steel construction at 60 to 65 HRC for long service life under repeated drilling cycles
• Non-renewable design — intended as a permanent fixture component
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an ANSI-standard Type H press fit headed drill bushing suitable for use in standard jig plates and drill fixtures that accept a 0.5-inch body outside diameter bushing with a headed configuration.

Installation Notes

Installation is performed by a machinist or toolroom technician using an arbor press or hydraulic press to seat the bushing flush into a prepared jig plate bore. The receiving bore must be machined to the specified press fit tolerance to achieve proper interference fit and prevent rotation or pull-out. Do not drive the bushing with an impact hammer, as this can crack the hardened body or damage the bore. Once pressed in, this bushing is not designed for removal or replacement without reworking the fixture bore.