Versatile Hole Cutting for Trade & Workshop Jobs

Need clean, accurate openings through metal, timber or plastic? Sutton bi-metal holesaws give Australian electricians, fabricators, maintenance crews & workshop trades a versatile solution for larger-diameter hole cutting. Sutton's H125 bi-metal cobalt holesaw range combines a tough body with cobalt HSS cutting teeth & is designed for hand or machine drilling across suitable steel, stainless steel, cast iron, non-ferrous metals, timber & plastics.

Choosing the right Sutton holesaw takes more than matching the diameter on the packet. Workpiece material, cutting depth, arbor compatibility, pilot drill condition & the machine driving the cutter all affect the setup. Get those details right & bi-metal hole saws become a practical option for electrical penetrations, fabrication work, workshop modifications, maintenance tasks & general trade hole cutting.

Building the complete setup? Browse  Drill Accessories for related drilling equipment, or head to  Drills when the driving tool is part of the buying decision.

What Are Sutton Bi-Metal Holesaws?

A holesaw makes a large opening differently from a conventional twist drill. Rather than removing material across the entire diameter, its toothed cup cuts around the circumference & leaves a removable core in the centre. This makes it an efficient option for suitable jobs where a clean, larger-diameter round opening is required.

The cutting setup has three important components working together:

► Holesaw – cuts the required outside diameter
► Arbor – connects the holesaw to the drilling machine
► Pilot drill – establishes the centre & helps guide the cutter into the workpiece

Sutton's H125 range uses bi-metal cobalt HSS construction, a 32mm cutting depth, varied-pitch cutting teeth, fast-ejection slots & an international thread pattern. Sutton lists the range for suitable steels, stainless steel, cast iron, non-ferrous materials, plastics & wood.

Understanding the complete system matters because the holesaw itself is only one part of the job. Correct diameter with the wrong arbor isn't a working setup, while a worn pilot drill can make a fresh holesaw harder to start accurately.

Why Choose Sutton Bi-Metal Holesaws?

Trade work rarely stays within one material or one type of job, which is where Sutton bi-metal holesaws earn their place in a well-equipped toolkit. Electricians may need to cut openings through steel enclosures before moving into timber framing, while fabricators regularly work across sheet metal, pipe, tube & manufactured components. Maintenance crews can face an even broader mix when modifying guards, brackets, panels & existing equipment.

The versatility of a bi-metal holesaw makes it particularly useful for these changing workshop & jobsite requirements. Sutton's H125 holesaws combine cobalt HSS cutting teeth with a tough bi-metal construction, providing a practical hole-cutting option across suitable ferrous metals, non-ferrous metals, timber & plastics. Rather than choosing on diameter alone, match the cutter to the material, required depth, arbor, pilot drill & driving machine.

Built for Mixed-Material Work

Sutton identifies a broad range of suitable materials for its H125 bi-metal cobalt holesaws, including:

► Steel
► Stainless steel
► Cast iron
► Aluminium
► Copper & brass
► Sheet metal
► Metal pipe
► Softwood & hardwood
► Plywood, chipboard & MDF
► PVC plastic

That material coverage is particularly useful for trades that need a hole-cutting system capable of moving between installation, fabrication, repair & maintenance work without treating every job as the same application.

Cobalt HSS Cutting Teeth

The H125 family uses bi-metal cobalt HSS construction designed to provide toughness & tool life for its intended applications. For buyers, however, the word cobalt shouldn't replace proper cutter selection. Hole diameter, workpiece material, depth, arbor compatibility, machine setup & cutting conditions still need to suit the job.

Varied-Pitch Teeth & Fast Ejection

Sutton uses varied-pitch cutting teeth on the H125 range to reduce vibration while supporting a cleaner finish & greater accuracy. Fast-ejection slots provide a practical way to help remove the cut core after the hole is completed.

These features are useful, but they don't replace good drilling practice. Secure workholding, appropriate speed, controlled feed, chip clearance & suitable lubrication when cutting metal all contribute to how the holesaw performs.

Common Applications

Electrical Enclosures & Cable Penetrations

Switchboards, junction boxes, cabinets & suitable metal enclosures often need round openings for cable glands, conduit fittings & related electrical hardware. Bi-metal holesaws are well suited to this type of work because the cutter can create a larger opening without removing the entire centre as swarf.

Sutton's Australian range also includes electrician-specific H125 holesaw sets built around commonly used diameters. For trades building out the rest of their installation gear,  Electrical Tool Kits provide a logical next step.

Sheet Metal & Fabrication

Fabrication jobs regularly call for round openings in panels, brackets, guards, pipework & manufactured components. A bi-metal holesaw can provide a practical alternative to other cutting processes where the required diameter, material thickness & access suit holesaw cutting.

Thin material still needs to be controlled properly. Poor workholding can allow the component to vibrate, grab or move as the teeth enter or break through the material.

Maintenance & Modification Work

Maintenance doesn't always hand you a clean drawing & a fresh component. Existing machinery may need another access point, a replacement panel may need modifying or a bracket may require a new penetration to suit updated equipment.

A versatile metal holesaw can be particularly useful here because the job often changes from one material or diameter to the next.

Timber & Board Products

Bi-metal doesn't mean metal only. Sutton also lists suitable timber products including softwood, hardwood, chipboard, plywood & MDF within the H125 application range, making these cutters relevant to carpentry, installation & fit-out work as well as metalworking.

Plastics

PVC plastic also sits within Sutton's listed H125 applications. Controlled feed remains important because forcing the cutter can generate unnecessary heat & produce a poorer result.

Product Selection Guide – Start With the Hole, Then Build the Setup

Buying a holesaw should start with the finished opening rather than whichever cutter happens to be sitting in the toolbox. Diameter matters, but it isn't the only specification worth checking.

Confirm the Required Hole Diameter

Start with what actually needs to pass through the opening. Cable glands, conduit fittings, pipework, locks & other components can require specific cut-outs, so measure the component or check its required opening before choosing the cutter.

For replacement work, don't assume the old holesaw diameter simply because the finished hole looks close. Confirm it.

Identify the Workpiece Material

Steel, stainless steel, aluminium, timber & plastic don't behave identically under a cutter. Confirm that the specific Sutton holesaw is suitable for the material before considering speed, feed or lubrication.

This is particularly important on maintenance jobs where the material may not be immediately obvious.

Check Material Thickness Against Cutting Depth

Diameter gets most of the attention, but cutting depth can stop the job just as quickly. Sutton specifies a 32mm cutting depth for the H125 bi-metal cobalt range, so compare the individual cutter specification against the workpiece before starting.

If the material or component geometry exceeds the capability of the holesaw, changing diameter won't solve the problem.

Match the Holesaw to the Correct Arbor

Don't assume every diameter uses the same arbor.

Within Sutton's H125 range, smaller cutters use a 1/2-UNF thread while larger sizes transition to a 5/8-UNF arrangement. Compatible arbor options therefore change across the range.

Check the diameter, thread & Sutton arbor compatibility together before ordering.

A holesaw without the right arbor is just a very determined-looking cup sitting on the bench.

Check the Pilot Drill

The pilot drill establishes the centre before the holesaw teeth fully engage with the workpiece. Inspect it as part of the complete system rather than treating it as something that lasts forever.

If the pilot is worn, damaged or unsuitable for the material, deal with that before blaming the new holesaw.

Check the Driving Machine

Hand drill or stationary machine? Available speed? Chuck capacity? Arbor requirements? Workpiece access?

Sutton's H125 holesaws can be used for suitable hand or machine drilling, but the complete drilling setup still needs to match the diameter, material & application.

Decide Between Individual Holesaws & a Set

Replacing one heavily used size? An individual holesaw may be all you need.

Regularly cutting several common diameters? Sutton offers H125 sets configured for different trades & applications, including electrician, plumber, carpenter & general-purpose selections.

Choose the set around the holes you regularly cut rather than simply buying the case with the most pieces.

Bi-Metal, Impact Bi-Metal or TCT? Choose by Application

Not every Sutton holesaw uses the same cutting technology. Standard bi-metal cobalt, impact bi-metal & TCT cutters solve different problems, so the material & machine should lead the decision.

The key is not assuming they're interchangeable simply because they all produce round openings. Sutton's impact bi-metal range is a separate product family intended for specific sheet-metal & impact-driver applications, while TCT holesaws bring a different tooth material & cutting approach.

Choose the technology after you've identified the job, not before.

Accurate Holes Start Before the Teeth Touch

The pilot drill may be small compared with the holesaw, but its first job is important: establishing the centre.

Once the holesaw teeth have committed to the workpiece, correcting a poorly positioned opening becomes a much bigger exercise. For jobs requiring manual layout,  Markers & Pencils can help establish the position before drilling starts.

A professional setup follows a simple sequence:

► Confirm the required opening
► Mark the centre accurately
► Check what sits behind the workpiece
► Secure the material appropriately
► Fit the correct arbor & pilot drill
► Confirm suitable cutting conditions
► Start the pilot accurately
► Allow the holesaw teeth to establish the cut

The quality of the finished opening often comes back to what happened before the cutter started working.

Core Ejection – Finish the Cut Properly

Cutting through the material isn't quite the end of the job. The circular core left inside the holesaw still needs to come out before the next hole can be made.

Sutton's H125 holesaws include fast-ejection slots to help with core removal. That's particularly useful when several holes need to be cut because spending time fighting a stuck slug between every opening quickly slows the job down.

Treat the core with the same respect as the cutting operation. Metal can be hot after drilling, while freshly cut edges may be sharp. Isolate the tool appropriately & use a suitable removal method rather than reaching straight into the cutter.

Expert Tips for Better Holesaw Results

Check behind the workpiece before drilling. The pilot drill reaches the far side before the holesaw body, so know what's sitting in its path.

Match speed to diameter & material. A small holesaw cutting timber isn't the same setup as a large cutter working through stainless steel. Follow suitable cutting guidance for the exact application.

Use appropriate cutting fluid on metal. Sutton recommends its Venom lubricating fluid to help increase tool life when cutting metal with the H125 range.

Keep the cutter square to the work. An angled start can load the teeth unevenly & make the holesaw harder to control.

Apply controlled feed rather than brute force. The teeth need the opportunity to cut. Leaning harder on the drill isn't a substitute for the correct setup.

Clear chips during demanding cuts. Chip build-up can interfere with cutting & heat management, particularly through thicker material.

Secure the workpiece properly. Larger holesaws can generate considerable torque if they grab. Workholding should suit the machine, component & cutting operation.

Inspect the arbor & pilot drill as well as the cutter. Worn supporting components can create poor results even when the holesaw teeth are still in good condition.

Pay attention at breakthrough. Cutting load can change quickly as the teeth reach the far side, particularly in thin material.

For practical advice on looking after tools between jobs, How To Clean Your Gear Without Ruining It covers useful equipment-care habits beyond the cutting operation.