Boneham SF326IM Slip-fixed Drill Bushing 5/16 in Id Steel

Product Description

The BONEHAM SF326IM is a slip-fixed drill bushing manufactured to ANSI standards for use in jig and fixture tooling applications. The bushing features a 0.3125 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches, ensuring accurate drill guidance and repeatable hole location. The body outside diameter is 0.5000 inches with a length under the head of 0.375 inches. Constructed from steel and hardened to 60 to 65 HRC, the SF326IM delivers the wear resistance required for sustained production drilling. A headed design retains the bushing within the jig plate, and the renewable configuration allows field replacement without scrapping the fixture body. A licensed machinist or tooling technician is the typical installer.

This bushing is designed for use in drill jig fixtures across precision machining, metalworking, and fabrication environments. The SF industry code designates it as a slip-fixed type, meaning it seats into a liner bushing and is secured with a lock screw rather than pressed directly into the jig plate. This configuration is common in production settings where bushings must be changed to accommodate multiple drill diameters at the same station. Compatible lock screw designation is LS-1. Applications span both light and heavy manufacturing wherever accurate, repeatable hole location is required.

Key Features

• Inside diameter of 0.3125 inches with precision tolerance of +0.0001 to +0.0005 inches for accurate drill guidance
• Steel construction hardened to 60 to 65 HRC for extended service life in production drilling
• Headed design retains bushing flush against the jig plate surface
• Renewable bushing construction allows replacement without fixture rework
• LS-1 compatible lock screw interface for secure seating in liner bushings
• Manufactured to ANSI standards for dimensional interchangeability

Compatibility

Designed as an ANSI-standard slip-fixed drill bushing for use with LS-1 lock screws and compatible liner bushings in drill jig fixtures. No specific fixture models or system families were identified in the provided product data.

Installation Notes

Installation is performed by a machinist or tooling technician during jig setup or bushing replacement. The slip-fixed bushing is inserted into a pre-installed liner bushing and secured with an LS-1 lock screw — do not force-fit or press the bushing directly into an unlined plate bore. Verify the liner bushing bore and the drill bushing OD are free of chips and burrs before seating. Always lock the bushing securely before beginning any drilling operation to prevent rotation or ejection during tool contact.