Boneham H4816KA Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H4816KA is a Type H press fit headed drill bushing machined from steel for use in jig and fixture tooling applications. It features a 0.397 inch inside diameter (Letter size X) with a close-tolerance bore of +0.0001 to +0.0005 inches, a 3/4 inch body outside diameter, and a 1 inch length under the head. The head outside diameter measures 59/64 inch with a head height of 7/32 inch. This bushing is pressed directly into a drill jig plate and provides a precise, hardened guide for drill bits, reamers, and similar cutting tools during repetitive hole-location operations. It is not a renewable (slip-fixed liner) type.

Type H headed press fit bushings are used in production drilling jigs and fixtures across metalworking, fabrication, and machining operations. The headed design seats flush against the jig plate surface and resists axial pull-through under cutting forces. Typical installations include multi-spindle drill jigs, transfer fixtures, and tooling plates where a permanent, non-removable bushing is required. This bushing suits applications where the same hole location is drilled repeatedly and the bushing does not need to be swapped out between operations.

Key Features

• Press fit installation — permanently secured in the jig plate bore without fasteners or locking mechanisms
• 0.397 inch (Letter X) inside diameter with precision bore tolerance of +0.0001 to +0.0005 inches
• Headed design with 59/64 inch head OD and 7/32 inch head height for positive axial retention
• 1 inch length under head provides adequate tool guidance depth for standard drilling operations
• Steel construction for durability and wear resistance in repeated drilling cycles
• Non-renewable (fixed) type — intended for permanent installation in the jig plate

Compatibility

Designed as an OEM-style replacement or new-installation component for Type H press fit headed drill bushing applications conforming to standard jig bushing industry code H specifications.

Installation Notes

Press fit bushings are installed by toolmakers or machinist-grade technicians using an arbor press or hydraulic press. The receiving hole in the jig plate must be reamed to the correct press fit tolerance before installation — do not hammer the bushing in by striking it directly. Confirm the bushing is seated fully and square to the plate surface before use. Removal of a pressed-in bushing typically destroys the bushing, so verify location before pressing.