Boneham SF648MK Slip-fixed Drill Bushing 41/64 in Id

Product Description

The BONEHAM SF648MK is a slip-fixed drill bushing designed for precision tooling and fixture applications in metalworking and machining operations. It features an inside diameter of 41/64 inches with a tight tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 1 inch, and a head outside diameter of 1-27/64 inches. The bushing is machined from steel and hardened to 60 to 65 HRC, providing the wear resistance required for repetitive drilling cycles. A head height of 3/8 inches and a length under head of 1/2 inch give it a low-profile fit in standard jig plates. Installation uses an LS-2 compatible lock screw and meets ANSI standards.

This SF-series slip-fixed bushing is used in drill jigs and fixture plates where the bushing must be locked securely in position during a machining operation but can be removed for replacement when worn. It is suited for production environments handling close-tolerance hole locations in steel, aluminum, and similar materials. Machinists, toolmakers, and fixture builders working in job shops, production machining, and maintenance tooling will encounter this style of renewable bushing routinely.

Key Features

• Inside diameter of 41/64 inches with tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction hardened to 60 to 65 HRC for extended service life under repeated drilling
• Slip-fixed installation method with LS-2 compatible lock screw for secure, removable mounting
• Head outside diameter of 1-27/64 inches and head height of 3/8 inches for standard jig plate seating
• Renewable bushing design allows replacement without replacing the liner bushing or jig plate
• Conforms to ANSI standards for interchangeability with other SF-series components

Compatibility

Designed as an ANSI SF-series slip-fixed renewable bushing compatible with LS-2 lock screws and standard liner bushings sized to accept a 1 inch body outside diameter.

Installation Notes

Installation and removal should be performed by a qualified toolmaker or machinist with the workpiece fixture secured and clear of any power source. The lock screw must be fully engaged before beginning any drilling operation to prevent rotation or pull-out of the bushing. Inspect the mating liner bushing bore for wear or damage before seating the SF648MK to ensure proper fit and concentricity. Follow applicable ANSI and shop-floor tooling standards for jig and fixture maintenance procedures.