Boneham SF6412LK Slip-fixed Drill Bushing Steel

Product Description

The BONEHAM SF6412LK is a slip-fixed (SF) drill bushing designed to guide drill bits and reamers with precision in jig plate applications. It features a 0.5 inch inside diameter, a 1 inch body outside diameter, and a 3/4 inch length under the head. Constructed from steel and hardened to 60-65 HRC, it delivers the wear resistance required in high-repetition drilling operations. The head outside diameter measures 1-27/64 inches with a 3/8 inch head height. The inside diameter tolerance is held to +0.0001 to +0.0005 inches, ensuring consistent hole location across production runs. It is compatible with the LS-2 lock screw for secure retention in the liner bushing.

Slip-fixed bushings of this type are used in drill jig assemblies across metal fabrication, machine shops, and precision manufacturing environments. The SF designation indicates this bushing presses into a liner bushing and is locked in place with a compatible lock screw, making it interchangeable without disturbing the jig plate. This configuration is standard in production tooling where multiple operations or drill sizes are required at a single jig location. Machinists, tool and die makers, and fixture builders are the typical installers.

Key Features

• Slip-fixed design locks into liner bushing with LS-2 compatible lock screw
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction hardened to 60-65 HRC for extended wear life
• Renewable bushing — replaceable without modifying the jig plate
• Head style provides positive axial positioning against the liner bushing face
• Conforms to ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed for use with LS-2 lock screws and standard ANSI-dimensioned liner bushings. Suitable for SF-series slip-fixed bushing applications requiring a 0.5 inch inside diameter and 1 inch body outside diameter.

Installation Notes

Installation is typically performed by machinists or tool and die makers as part of jig plate assembly or bushing replacement. Ensure the liner bushing bore and jig plate surface are clean and free of chips before inserting the slip-fixed bushing. Use the correct LS-2 lock screw to secure the bushing and prevent rotation or axial movement during drilling. Do not force the bushing into an undersized or damaged liner — verify liner ID tolerance before installation.