Sutton H125 111mm Bi-Metal Cobalt M42 Holesaw

The Sutton H125 is a 111mm holesaw, the largest of the single H125 sizes in this range, made from bi-metal cobalt HSS and built for the big penetrations where a clean round hole matters. It cuts to a 32mm depth and is listed for machine or hand drilling in steel, stainless steel, cast iron, non-ferrous metals, plastic and wood. The saw runs on the UA3 or QFX arbor class with a BD24 or BD26 pilot.

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: 111mm (4 3/8 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

• Exhaust fan and duct holes through roofs and walls
• Large vent and grille openings
• Access and inspection holes in panels
• Big pipe and duct penetrations
• Industrial and commercial fitouts

What You Need To Complete The Job

Set the saw up on a quick fit arbor with a BD26 pilot drill and drive it with a low-speed drill with good torque. Use a cutting lubricant on metal. When the job is concrete or brick, use an SDS masonry drill instead. The wider cutting range is under Carpentry Tools.

Frequently Asked Questions

Is a 111mm holesaw too big for a hand drill?

It is on the edge. A hand held corded drill can drive it in timber and thin sheet if you go slowly and let the saw cut, but the bigger the saw, the more a pillar drill or a low-speed magnetic drill earns its keep. For a run of large holes, set the work up at a drill press.

What are the 111mm holes used for?

This size suits exhaust fans, large vents, duct entries and inspection openings that need a hole just over 110mm. It is common in roof and wall penetrations where a 100mm hole is too tight and the fitting needs a bit of clearance.

How long does it take to cut a 111mm hole in steel?

In sheet steel, with a sharp saw, the right speed and a lubricant, a 111mm hole cuts in well under a minute. The time grows with plate thickness, so on heavy plate let the saw work steadily and clear the swarf often. Do not force the feed.

Can I use the same arbor for my other H125 saws?

Yes. The H125 series uses the international thread standard, so the one quick fit arbor and pilot combination works across the range. If you have an H125 set, the arbor you use for this 111mm saw fits the smaller sizes too.