Boneham P138CT Press Fit Headless Drill Bushing

Product Description

The BONEHAM P138CT is a press fit headless drill bushing designed to guide drill bits and cutting tools with precision in jig and fixture applications. Built to ANSI standards, this bushing features a 0.0935 inch inner diameter (wire gauge size 42), a 13/64 inch body outside diameter, and a 1/2 inch overall length. Manufactured from steel and hardened to 60 to 65 HRC, it delivers consistent bore alignment and long service life in repetitive drilling operations. The headless profile allows flush seating in the jig plate, making it suitable where a projecting head would interfere with the workpiece or fixturing setup.

This bushing is used in tool and die, machine shop, and production drilling environments where accurate hole location is critical. Press fit installation means it is permanently seated into a prepared jig plate bore without a retaining liner bushing. It is appropriate for light-to-medium production runs in both manual and CNC-assisted jig drilling setups. Machinists, toolmakers, and fixture builders are the primary installers.

Key Features

• 0.0935 inch (wire size 42) inner diameter with a close tolerance of +0.0001 to +0.0004 inches for precise drill guidance
• Hardened steel construction at 60 to 65 HRC for wear resistance in repetitive drilling cycles
• Headless design seats flush with jig plate surface, eliminating interference with workpieces
• Press fit installation — no liner bushing required, permanent seating in prepared bore
• Meets ANSI standards for drill bushing dimensions and tolerances
• Bushing industry code P for straightforward cross-reference and replacement sourcing

Compatibility

Designed as an OEM-style replacement or new-installation press fit headless drill bushing conforming to ANSI P-series dimensional standards for use in standard jig plate bores sized to accept a 13/64 inch outside diameter bushing.

Installation Notes

Installation is performed by machinists or toolmakers using a press or arbor press to seat the bushing flush into a precision-bored jig plate hole. The receiving bore should be machined to the appropriate interference fit per ANSI jig bushing standards before pressing. Never drive the bushing with a hammer directly on the bore face, as this can distort the inner diameter and compromise drill guidance accuracy. Once pressed in, the bushing is not intended to be removed or reused.