Boneham SFT285HD Slip-fixed Drill Bushing 0.246 in Id Steel

Product Description

The BONEHAM SFT285HD is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Manufactured from steel and conforming to industry code SF, this bushing features an inside diameter of 0.246 inches, a body outside diameter of 0.4375 inches (7/16 inches), and a length under head of 0.3125 inches (5/16 inches). The headed design allows it to seat flush against a liner or fixture plate. Renewable construction means the bushing can be removed and replaced without disturbing the press-fit liner, extending tooling life in high-production environments. This part is compatible with LS-TW-2 lock screws and carries a UNSPSC code of 31171603.

The SFT285HD is intended for use in drill jig fixtures across manufacturing, machining, and tool-and-die applications. It is suited for operations requiring repeatable hole location accuracy where the bushing must be swapped out between operations or changed as wear occurs. The headed body style keeps the bushing positively positioned axially within the jig plate. This bushing is appropriate for machinists, tool makers, and manufacturing maintenance technicians working with ferrous and non-ferrous materials.

Key Features

• Inside diameter of 0.246 inches with a tight tolerance of +0.0001 to +0.0004 inches for precise tool guidance
• Body outside diameter of 0.4375 inches (7/16 inches) for standard liner seating
• Length under head of 0.3125 inches (5/16 inches)
• Head outside diameter of 0.625 inches (5/8 inches) with head height of 0.25 inches (1/4 inches)
• Renewable bushing design allows field replacement without liner removal
• Compatible with LS-TW-2 lock screw for secure retention in the jig plate
• Steel construction for durability in repetitive drilling operations

Compatibility

Designed as an SF-type slip-fixed renewable drill bushing for use with standard jig liner systems and LS-TW-2 compatible lock screws.

Installation Notes

Installation is performed by machinists or tool-and-die technicians. Ensure the mating liner bore and seating surface are clean and free of burrs before inserting the bushing. Secure the bushing using an LS-TW-2 compatible lock screw; do not overtighten the lock screw as this may distort the bushing bore. Verify inside diameter clearance with the intended drill or reamer before committing the jig to production.