Boneham SF6428LK Slip-fixed Drill Bushing 0.5 in Id Steel

Product Description

The BONEHAM SF6428LK is a slip-fixed drill bushing manufactured from hardened steel to ANSI standards. It features a 0.5 inch inside diameter, a 1 inch body outside diameter, and a 1.75 inch length under the head. The head outside diameter measures 1.4375 inches with a head height of 0.375 inches. Hardness is rated at 60 to 65 HRC, providing consistent bore guidance and wear resistance in jig and fixture applications. The renewable design allows replacement without disturbing the jig plate. Compatible with LS-2 lock screws for positive retention during drilling operations. This bushing is installed by toolmakers, machinists, and fixture builders in production and job-shop environments.

Slip-fixed bushings are used in drill jigs where a fixed outer liner is already installed in the jig plate and the renewable bushing must be locked in position during the operation. The SF6428LK is suited for applications requiring a headed, renewable bushing with a positive locking mechanism. It is appropriate for use in ferrous and non-ferrous drilling, reaming, and similar hole-locating operations in precision fixture work across industrial manufacturing and metalworking settings.

Key Features

• Inside diameter of 0.5 inches with a tolerance of +0.0001 to +0.0005 inches for precise hole guidance
• Hardened steel construction rated at 60 to 65 HRC for long service life in repetitive drilling applications
• Renewable bushing design allows field replacement without reworking the jig plate
• LS-2 lock screw compatible for positive retention in the liner during use
• Head outside diameter of 1.4375 inches and head height of 0.375 inches for standard jig plate seating
• Manufactured to ANSI standards for dimensional interchangeability

Compatibility

Designed as an ANSI-standard slip-fixed renewable drill bushing compatible with LS-2 lock screws and standard SF-series drill jig liners. Renewable design conforms to ANSI slip-fixed bushing industry code SF.

Installation Notes

Installation is performed by toolmakers or machinists during jig setup or bushing replacement. Ensure the mating liner is clean and free of chips before inserting the bushing. The LS-2 lock screw must be engaged to secure the bushing before beginning any drilling or reaming operation. Never force the bushing into a liner with a mallet, as this can damage the bore tolerance or liner seating surface.