M.k. Morse 139069 Hole Saw Arbor 6 in Hex Shank

Product Description

The M.K. MORSE 139069 is a hole saw arbor designed to drive hole saws ranging from 1-1/4 to 6 inches in diameter. It features a 7/16-inch hex shank and a quick-change attachment method that allows fast tool swaps without additional hardware. An integrated high speed steel pilot drill centers the saw before cutting begins, reducing walking and improving cut accuracy. The arbor threads at 5/8-18 and requires a minimum chuck size of 11 mm. It is built from steel for durability under repeated use. Licensed tradespeople and experienced contractors use this arbor with compatible bi-metal or carbide hole saws in drilling applications across multiple trades.

This arbor is suited for use in residential and light commercial installation work where large-diameter holes are required. Typical applications include drilling through wood framing, drywall, and similar substrate materials for HVAC ducting penetrations, plumbing rough-in, and electrical conduit runs. The quick-change design is particularly useful when alternating between multiple saw diameters on a single job. The hex shank seats securely in standard drill chucks and impact-rated drivers that meet the 11 mm minimum chuck requirement.

Key Features

• Accepts hole saws from 1-1/4 to 6 inches in diameter
• 7/16-inch hex shank with quick-change attachment for fast bit swaps
• Integrated high speed steel pilot drill for accurate centering
• 5/8-18 thread size for standard hole saw compatibility
• Steel arbor body for durability under repeated load cycles
• Requires minimum 11 mm chuck — compatible with most full-size drills

Compatibility

Compatible with hole saws from 1-1/4 to 6 inches in saw diameter. Designed for use with hole saws threaded at 5/8-18 using a quick-change attachment method.

Installation Notes

Installation and use of this arbor is appropriate for electricians, plumbers, HVAC technicians, and general contractors performing rough-in drilling work. Ensure the drill or driver chuck meets the 11 mm minimum size requirement before mounting. Confirm the hole saw is fully threaded and seated on the arbor before beginning a cut. Disengage power and allow all rotating components to come to a full stop before changing hole saw attachments.