Boneham AM00000070 Drill Bushing Hm 19.5 Inch Id

Product Description

The BONEHAM AM00000070 is a press fit headless drill bushing in the HM industry classification, designed to guide drill bits with precision in metalworking and machining operations. It features a 19.5-inch inside diameter and a steel construction hardened to 60 to 65 HRC, providing consistent hole location accuracy under repeated drilling cycles. This bushing installs without a head flange, seating flush into the jig plate via press fit. It is a non-renewable, fixed-installation style intended for production tooling and drill jig applications where long service life and dimensional stability are required.

This bushing is suited for machine shops, toolroom environments, and production floor drill jig setups. It is appropriate for both light and heavy-duty drilling operations where accurate hole guidance is critical. The HM industry code designates specific dimensional relationships between inside diameter, outside diameter, and length, making this part interchangeable within that standard family. Machinists, toolmakers, and jig and fixture builders are the primary installers of this component.

Key Features

• Press fit installation — no head flange, mounts flush with jig plate surface
• HM industry classification for standardized dimensional interchangeability
• Hardened steel construction rated 60 to 65 HRC for extended wear resistance
• Non-renewable design for permanent jig plate installation
• Conforms to ANSI standards for drill bushing dimensions and tolerances
• Inside diameter tolerance of plus 0.007 to plus 0.020 mm for consistent bit guidance

Compatibility

Designed as an OEM-style replacement or direct-fit component for drill jigs and fixtures requiring an HM-series press fit headless bushing with a 19.5-inch inside diameter per ANSI standards.

Installation Notes

Installation is performed by toolmakers or machinists using a drill press or arbor press to seat the bushing into a properly sized jig plate bore. The receiving bore must be machined to the correct interference fit tolerance before pressing to avoid bushing distortion or improper seating. Do not use impact tools to drive the bushing. Verify jig plate material compatibility and bushing alignment before pressing to final depth.