Sutton H125 21mm Bi-Metal Cobalt M42 Holesaw

The Sutton H125 is a 21mm holesaw made from bi-metal cobalt HSS, sized for clean holes in steel, stainless steel, cast iron, non-ferrous metals, plastic and wood. It cuts to a 32mm depth and suits machine or hand drilling. This size carries the two features Sutton builds into the better H125 saws: varied pitched teeth that break up vibration for a cleaner finish, and fast ejection slots that push the cut core out as you finish. Sutton also lists Venom lubricating fluid for cutting metal to extend the life of the saw.

Key Features

• Varied pitched cutting teeth reduce vibration for a cleaner finish
• Fast ejection slots make removing the core easier
• Bi-metal cobalt HSS for toughness and longer life
• 32mm cutting depth
• International thread for the Sutton Quickfit arbor, item H103 QFX
• Suits machine or hand drilling

Specifications

• Diameter: 21mm (13/16 inch)
• Model: H125, white label series
• Material: bi-metal cobalt HSS
• Cutting depth: 32mm
• Thread: international, fits Sutton H103 QFX Quickfit arbor
• Pilot: BD24 or BD26 pilot drill

Applications

• Penetrations for conduit and cable through steel
• Holes in switchboards and electrical panels
• Sheet metal and light plate work
• Timber, plywood and composite panels
• Plumbing and ventilation holes through cladding

What You Need To Complete The Job

Mount the saw on a Sutton Quickfit arbor with a BD24 pilot drill, and use a cutting lubricant when working in metal. For concrete or brick, change to an SDS masonry drill. The wider fastening and cutting range lives in Carpentry Tools.

Frequently Asked Questions

Why do the teeth have a varied pitch?

Varied pitched teeth break up the rhythm of the cut, which stops the vibration that makes a holesaw chatter and leaves a rough edge. The result is a steadier cut and a cleaner hole, which matters most when you are cutting thin sheet or a visible panel face.

How do the ejection slots help?

As the saw reaches full depth, the cut core can jam inside the saw body. The fast ejection slots give the core a way out and make it easier to clear, so you spend less time knocking cores out and more time cutting. It is a small detail that speeds up a run of holes.

Should I use the Venom fluid Sutton mentions?

Sutton recommends its Venom lubricating fluid when cutting metal to extend the life of the tool. A cutting lubricant of any kind keeps the bi-metal teeth cool and stops the edge loading up, so on steel and stainless it is worth having on hand. On timber and plastic you can cut dry.

Will a 21mm saw fit my existing arbor?

The saw uses the international thread standard, which is the common thread across Sutton and most quick fit holesaw systems. If your arbor is a standard quick fit type, it will thread on. The listing specifically names the Sutton H103 QFX arbor as the match for this series.