Boneham H166EF Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H166EF is a Type H press fit headed drill bushing used to guide drill bits and other cutting tools with precision in jig and fixture applications. Machined from steel and hardened to 60 to 65 HRC, this bushing resists wear through repeated drilling cycles. The headed design seats flush against the jig plate, keeping the bushing positively located without additional locking hardware. The inside diameter measures 0.1405 inches with a tolerance of plus 0.0001 to plus 0.0004 inches, providing accurate tool guidance consistent with ANSI standards. Machinists, toolmakers, and precision fabricators install this bushing as a permanent, non-renewable component.

This bushing is suited for production jigs and fixtures in metalworking, fabrication shops, and manufacturing environments where repeatable hole location is required. The press fit installation method makes it appropriate for applications where the bushing will remain in place for the life of the jig. The 3/8-inch length under head provides adequate support for standard jig plate thicknesses encountered in typical fixture construction.

Key Features

• Type H headed design seats positively against jig plate face
• Press fit installation — no locking collar required
• Inside diameter of 0.1405 inches with tight ANSI tolerance of plus 0.0001 to plus 0.0004 inches
• Hardened steel construction at 60 to 65 HRC for extended wear life
• Non-renewable (permanent) bushing — designed for long-run fixture applications
• Compliant with ANSI standards for drill bushings

Compatibility

Designed as an OEM-style replacement or direct-install component for standard drill jigs and fixtures requiring a Type H press fit headed drill bushing with a 0.1405-inch bore and 1/4-inch body outside diameter.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press — never hammer directly on the bushing head. The jig plate bore must be machined to the appropriate interference fit tolerance before installation. Once pressed in, the bushing is considered permanent and is not designed for removal and replacement. Verify bore alignment with the fixture design before pressing to avoid misalignment that cannot be corrected without scrapping the plate.