Boneham SF488IU Slip-fixed Drill Bushing 21/64 in Id

Product Description

The BONEHAM SF488IU is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Manufactured from steel and hardened to 60 to 65 HRC, this bushing delivers the wear resistance required for repetitive drilling, reaming, and boring operations. The inside diameter measures 21/64 inches with a tolerance of +0.0001 to +0.0005 inches, ensuring consistent tool alignment across production runs. The body outside diameter is 0.750 inches and the length under head is 1/2 inch. It ships individually and meets ANSI standards. Machinists, toolmakers, and fixture builders install this type of bushing in drill jigs used across metal fabrication and manufacturing environments.

The SF488IU fits SF-series slip-fixed bushing applications where the bushing must be removed and replaced during a multi-operation sequence without disturbing the jig plate. The head outside diameter is 1-3/64 inches and head height is 1/4 inch. The bushing is renewable, meaning it can be swapped out for different inside-diameter liners as the operation changes. Lock screw compatibility is LS-1. This makes it well-suited for production jig work where multiple hole sizes are drilled from the same fixture location in sequence.

Key Features

• Slip-fixed SF-series installation method for quick removal and replacement during multi-step operations
• Inside diameter of 21/64 inches with a precision tolerance of +0.0001 to +0.0005 inches
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Renewable bushing design allows liner swaps without re-pressing the outer shell
• LS-1 compatible lock screw engagement secures the bushing during use
• Meets ANSI standards for drill bushing dimensions and fit

Compatibility

Designed for use with LS-1 lock screws and compatible with SF-series slip-fixed bushing jig plate bores requiring a 3/4 inch body outside diameter.

Installation Notes

Toolmakers and machinists install slip-fixed bushings by inserting the bushing into a liner already pressed into the jig plate, then securing it with an LS-1 lock screw. Power down and de-energize any automated drilling equipment before servicing the jig. Verify the liner bore is clean and free of chips before inserting the bushing. Do not force the bushing into an undersized or damaged liner bore.