M.k. Morse 139014 Hole Saw Arbor Hex Shank Pilot Drill

Product Description

The M.K. MORSE 139014 is a hex shank hole saw arbor with an integral high speed steel pilot drill, designed to drive bi-metal and carbide hole saws in standard drill chucks. The 3/8-inch hex shank fits any chuck with a 10 mm or larger opening, and the threaded shank attachment uses a 1/2-20 thread to secure compatible hole saws firmly during use. The arbor body is steel construction for durability under repeated use. This is a direct-drive accessory for electricians, plumbers, HVAC technicians, and general contractors who need reliable hole saw performance in wood, metal, and composite materials.

The 139014 is suited for residential and light commercial applications where hole saws in the 9/16-inch to 1-3/16-inch range are required. Typical install scenarios include drilling knockout holes for conduit, pipe penetrations, and box openings. The hex shank prevents slipping in standard drill and driver chucks, making it a practical replacement or spare arbor for field toolkits.

Key Features

• Hex shank cross-section prevents rotation and slipping in drill chuck
• Integral high speed steel pilot drill centers the hole saw before cutting begins
• Threaded shank attachment with 1/2-20 thread secures hole saws without tools
• Compatible with hole saws ranging from 9/16 inches to 1-3/16 inches
• Steel arbor body rated for repeated field use
• Minimum chuck size of 10 mm keeps it compatible with most standard drills

Compatibility

Designed for use with 9/16 inch to 1-3/16 inch hole saws using a 1/2-20 threaded attachment. Requires a drill chuck with a minimum opening of 10 mm.

Installation Notes

Thread the hole saw onto the arbor until fully seated before inserting the shank into the drill chuck. Ensure the drill is unplugged or the battery removed before changing accessories. A licensed electrician, plumber, or HVAC technician should verify that all penetrations comply with applicable NEC, IPC, or IFGC clearance and firestopping requirements after drilling.