Boneham SF328GB Slip-fixed Drill Bushing 0.199 in Id Steel

Product Description

The BONEHAM SF328GB is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to the SF industry code and conforming to ANSI standards, this bushing features a 0.199-inch inside diameter sized for a No. 8 wire gauge drill, a 0.5-inch body outside diameter, and a head-type design for positive axial location. Hardness is rated at 60 to 65 HRC, providing the wear resistance needed for repeated drilling cycles. The inside diameter tolerance of +0.0001 to +0.0004 inches ensures tight, repeatable tool guidance. A licensed machinist or toolmaker typically installs and services this component in production jig setups.

This bushing is suited for metal fabrication, machine shops, and production environments where consistent hole location is critical. The slip-fixed style allows the bushing to be locked in place with an LS-1 compatible lock screw, making it practical for single-operation drill jigs where the bushing remains stationary during use. The renewable design means the bushing can be replaced when worn without scrapping the jig plate, reducing long-term tooling costs.

Key Features

• SF slip-fixed bushing with head for positive axial seating in jig plates
• Inside diameter: 0.199 inches (No. 8 wire gauge) with +0.0001 to +0.0004 inch tolerance
• Hardness: 60 to 65 HRC for extended wear life in high-cycle drilling
• Renewable bushing design allows field replacement without jig plate rework
• LS-1 compatible lock screw interface for secure, slip-resistant mounting
• Conforms to ANSI standards for drill bushing dimensions and fit

Compatibility

Designed for use in standard ANSI SF-series slip-fixed drill jig applications using an LS-1 compatible lock screw. Consult your jig plate specifications to confirm counterbore dimensions before installation.

Installation Notes

Installation is typically performed by a machinist or toolmaker. Ensure the jig plate counterbore is clean and free of burrs before pressing or seating the bushing. The lock screw must be tightened to secure the bushing before any drilling operation begins. Do not attempt to install or remove the bushing while the fixture is under load or while cutting tools are engaged.