Sutton H125 30mm Bi-Metal Cobalt M42 Holesaw

The Sutton H125 is a 30mm holesaw built from bi-metal cobalt HSS, a construction Sutton uses for a cutting edge that stays sharp in continuous use. It drills to a 32mm depth and suits machine or hand drilling in steel, stainless steel, cast iron, non-ferrous metals, plastic and wood. The saw is listed for the UA3 or QFX arbor class with a BD24 or BD26 pilot, which supports the larger diameter and keeps the cut true.

Key Features

• Bi-metal cobalt HSS for toughness and longer life
• 32mm cutting depth
• International thread standard accepts all standard arbors
• Listed for the UA3 or QFX arbor
• Suits machine or hand held drilling
• Cuts steel, stainless steel, cast iron, non-ferrous metals, plastic and wood

Specifications

• Diameter: 30mm (1.3/16 inch)
• Model: H125, white label series
• Material: bi-metal cobalt HSS
• Cutting depth: 32mm
• Thread: international thread standard
• Arbor and pilot: UA3 or QFX arbor, BD24 or BD26 pilot drill

Applications

• Cable and conduit penetrations through steel
• Plumbing and pipe entries through panels
• Ventilation and fan holes in cladding
• Timber, plywood and composite panels
• General fabrication and maintenance

What You Need To Complete The Job

Run the saw on a quick fit arbor with a BD26 pilot drill in the centre. Keep a pair of leather rigger gloves on when handling cut metal. For masonry, change to an SDS masonry drill. More cutting gear is under Carpentry Tools.

Frequently Asked Questions

What is the difference between the UA3 and QFX arbor?

Both are listed as matches for this size. The QFX is the Sutton quick fit type with spring clutch drive pins that lock the saw on with a slide of the collar, while the UA3 is the standard threaded arbor type. If you already own one, check the thread class; either supports this saw.

Can I drill a 30mm hole in stainless with this saw?

Yes, stainless is on the listed range, but it asks more of the teeth. Use a slower speed, keep a cutting lubricant on the cut, and feed steadily so the edge cuts rather than rubbing. The cobalt in the bi-metal helps the teeth resist the heat stainless generates.

How do I keep the core from jamming?

Lift the saw out part way on deep cuts and let the flutes clear the swarf. As the saw nears full depth, ease the pressure so the core releases cleanly. A quick tap clears the core if it does catch, and cutting a run of holes is faster when the core comes out in one piece.

Is 30mm a common plumbing size?

It is a useful in between size for pipe and cable entries where a 32mm knockout is a touch too big. Plumbers and electricians often reach for it for penetrations through cabinets, cladding and metal enclosures when running small pipe or heavy cable.