Boneham SF4816IU Slip-fixed Drill Bushing 21/64 in Id

Product Description

The BONEHAM SF4816IU is a slip-fixed (SF) drill bushing used to guide cutting tools with precision during drilling, reaming, and boring operations. It features a 21/64 inch inside diameter, a 3/4 inch body outside diameter, and a 1 inch length under head. Constructed from steel, this renewable bushing is designed to be removed and replaced without disturbing the jig plate, making it a practical choice for production drilling fixtures that see high cycle counts. It is compatible with the LS-1 lock screw for secure retention in the liner bushing during use.

Slip-fixed bushings of this type are used in tooling jigs and drill fixtures across manufacturing, machining, and metalworking environments. The SF series installs into a pressed liner bushing and is held in place by a lock screw, allowing the bushing to be swapped when worn without reworking the fixture plate. This part is suited for applications requiring repeatable hole location accuracy where tooling wear is a routine maintenance consideration.

Key Features

• Slip-fixed (SF) installation method — removable from liner bushing for fast changeout
• 21/64 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• 3/4 inch body outside diameter (0.7500 inches decimal) with a 1-3/64 inch head outside diameter
• 1 inch length under head suits standard fixture plate depths
• Steel construction for durability in high-cycle drilling applications
• Compatible with LS-1 lock screw for positive retention in the liner
• Renewable bushing design — replaceable without jig plate modification

Compatibility

Designed for use with LS-1 compatible lock screws and pressed liner bushings in standard SF-series drill jig fixtures. Fits fixture applications requiring a 3/4 inch body outside diameter slip-fixed bushing seat.

Installation Notes

Installation is performed by machinists or tooling technicians. The SF bushing drops into a pre-installed liner bushing and is locked in position with an LS-1 lock screw — ensure the liner bushing is properly pressed and seated in the jig plate before installing this component. Disengage and secure all machine motion before inserting or removing the bushing. When replacing a worn bushing, verify the liner bushing bore for wear or damage before installing the new part.