Boneham AM00000129 Drill Bushing Hm 3.7 in Id Steel

Product Description

The BONEHAM AM00000129 is a press fit headless drill bushing in the HM industry classification, designed to guide drill bits and boring tools with precision during machining operations. It installs permanently into a jig plate without a head flange, seating flush with the plate surface. Manufactured from steel with a hardness of 60 to 65 HRC, this bushing resists wear during repeated drilling cycles. The inside diameter is 3.7 inches with a tight tolerance of +0.004/+0.012 mm to maintain accurate hole location. Machinists, tool and die makers, and jig builders install this type of bushing in production and prototype drilling fixtures.

This bushing is suited for use in drill jig applications where a permanent, non-renewable liner is acceptable. The headless press fit design allows the bushing to sit flush within a jig plate, making it appropriate for workpiece surfaces where a headed bushing would interfere with tool clearance or workpiece contact. It is commonly used in metalworking shops, fabrication facilities, and manufacturing environments requiring repeatable hole placement. The part meets ANSI standards and is sold individually.

Key Features

• HM industry classification headless press fit design for permanent jig installation
• Inside diameter of 3.7 inches with tolerance of +0.004/+0.012 mm for precise drill guidance
• Body outside diameter of 7.00 mm for consistent press fit engagement
• Overall bushing length of 16.00 mm
• Steel construction hardened to 60 to 65 HRC for long service life in repetitive drilling applications
• Meets ANSI standards; non-renewable bushing type

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for drill jig plates requiring a press fit headless bushing in the HM series with a 3.7-inch inside diameter.

Installation Notes

Press fit headless drill bushings are typically installed by a tool and die maker or machinist using an arbor press to seat the bushing flush into the jig plate bore. Ensure the receiving bore in the jig plate is machined to the correct interference fit dimension before pressing. Do not use impact tools to drive the bushing, as this can distort the inside diameter and compromise drill guidance accuracy. Follow applicable shop safety procedures and machinery guarding requirements during installation.