Boneham SF325IM Slip-fixed Drill Bushing Steel Head Type

Product Description

The BONEHAM SF325IM is a slip-fixed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Built to ANSI standards, this head-type bushing features a 0.3125-inch inside diameter and a 0.5-inch body outside diameter, with a 0.3125-inch length under the head. Manufactured from steel with a hardness rating of 60 to 65 HRC, the SF325IM delivers the wear resistance and dimensional accuracy required for production drilling jigs. It accepts an LS-1 compatible lock screw for positive retention in the jig plate.

The SF325IM is suited for use in drill jig applications across precision machining, tool and die, and metalworking environments. Its slip-fixed (SF) configuration allows the bushing to be installed and removed without special tooling, making it practical for jigs that require bushing changes between operations. The head outside diameter measures 51/64 inches and the head height is 1/4 inch, providing a stable seating surface against the jig plate. This bushing is typically installed by toolmakers, machinists, and jig builders working in industrial manufacturing settings.

Key Features

• Slip-fixed (SF) configuration allows removal and replacement without press tooling
• Steel construction with 60 to 65 HRC hardness for extended wear life in high-cycle drilling applications
• Inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent tool guidance
• LS-1 compatible lock screw engagement for positive retention in the jig liner
• Renewable bushing design supports in-service replacement without disturbing the jig plate
• Meets ANSI standards for drill bushing dimensions and fit

Compatibility

Designed as an ANSI-standard slip-fixed replacement bushing compatible with LS-1 lock screws. Fits standard SF-series drill jig liner installations requiring a 0.3125-inch inside diameter and a 0.5-inch body outside diameter.

Installation Notes

Drill bushing installation is typically performed by toolmakers or machinists. Verify that the mating jig liner is clean and free of debris before seating the bushing. Secure the bushing with an LS-1 compatible lock screw, ensuring the screw engages the head notch fully. Do not use the bushing as a press-fit component in applications that require interference fits, as the slip-fixed design is intended for renewable, slip-fit liner installations.