Boneham H206EC Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H206EC is a Type H press fit headed drill bushing manufactured from hardened steel for use in jig and fixture applications. It features an inside diameter of 0.136 inches (wire size No. 29), a body outside diameter of 5/16 inch, and a length under head of 3/8 inch. The head outside diameter measures 27/64 inch with a head height of 1/8 inch. Hardness is rated at 60 to 65 HRC, providing the wear resistance required for repetitive drilling operations. This is a permanent, non-renewable bushing installed by press fit — no liner bushing or lock is required. Machinists, toolmakers, and jig builders install this type of bushing to guide drill bits with precision and maintain hole location across production runs.

The H206EC suits metal fabrication shops, machine shops, and manufacturing environments where consistent hole positioning is critical. Headed drill bushings of this type are seated flush in a counterbored plate or jig body, with the head bearing against the top surface to control seating depth. The No. 29 wire gauge bore makes this bushing appropriate for applications requiring a tight drill guide at smaller drill diameters. It is sold individually and carries an ANSI standard designation.

Key Features

• Type H press fit design — permanent installation without a liner or lock bushing
• Inside diameter of 0.136 inches (No. 29 wire size) with a tolerance of plus 0.0001 to plus 0.0004 inches
• Body OD of 5/16 inch, head OD of 27/64 inch, head height of 1/8 inch
• Length under head: 3/8 inch
• Hardened steel construction rated at 60 to 65 HRC for long service life
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an ANSI-standard press fit headed drill bushing suitable for use in steel or cast-iron jig plates and fixture bodies requiring a permanent bushing at the No. 29 wire gauge drill size.

Installation Notes

Press fit bushings are installed by a toolmaker or machinist using an arbor press — never drive them in with a hammer, as this can damage the bore or distort the bushing. The jig plate bore must be machined to the correct interference fit tolerance before installation. Once pressed in, the H206EC is not designed for removal or replacement. Verify bore dimensions and surface finish of the jig plate prior to installation to ensure proper seating.