Boneham AM00000088 Drill Bushing Hm 2.9 Inches Id

Product Description

The BONEHAM AM00000088 is a press fit headless drill bushing in the HM industry classification, manufactured from steel and designed to guide drill bits with precision in fixed jig plate applications. The bushing features a 2.9-inch inside diameter and a hardness rating of 60 to 65 HRC, making it suitable for demanding, repetitive drilling operations. It installs permanently into a jig plate without a head flange, giving a flush, low-profile seating surface. Machinists and tool-and-die professionals install this bushing where a non-renewable, fixed-position guide is the correct solution. The inside diameter tolerance of +0.002 to +0.008 mm ensures consistent hole location accuracy across production runs.

This bushing is used in metal fabrication, machining, and precision drilling fixture applications where a permanent press fit installation is required. It is appropriate for production jigs and fixtures in both shop and industrial settings. The HM designation aligns with ANSI standards for drill bushing dimensions and interchangeability, allowing it to fit jig plates engineered to that specification. It is not a renewable bushing and is intended to remain in the jig plate for the life of the fixture or until the plate is reworked.

Key Features

• Press fit, headless installation for a flush, permanent mount in jig plates
• HM industry code — dimensioned and toleranced to ANSI standards
• 2.9-inch inside diameter with a tight tolerance of +0.002 to +0.008 mm for accurate drill guidance
• Steel construction hardened to 60 to 65 HRC for wear resistance in repetitive drilling
• Non-renewable design suited to permanent fixture applications
• Compact body: 6.00 mm outside diameter and 8.00 mm overall length

Compatibility

Designed as an ANSI-conforming HM-series press fit headless drill bushing for use in jig plates and drilling fixtures built to HM bushing specifications.

Installation Notes

Press fit bushings are installed by a machinist or toolmaker using an arbor press or hydraulic press — never drive them in with a hammer, as this can damage the bore geometry. The jig plate bore must be machined to the correct interference fit dimension per ANSI bushing standards before installation. Once pressed in, the bushing is considered permanent and is not designed for removal and reuse. Inspect the seating surface for burrs before pressing to ensure full, square contact.