Fast, Clean Holes Through Metal

A clean opening through steel, stainless steel or aluminium doesn't always call for a large conventional drill bit. Sutton Tools TCT hole cutters use tungsten carbide cutting teeth to remove material around the circumference of the hole, making them a practical choice for electricians, fabricators, automotive workshops, maintenance teams & metalworkers producing larger-diameter openings.

For buyers comparing TCT metal holesaws, the important checks are straightforward: finished hole diameter, material, cutting depth, drilling machine & workpiece setup.

Building the complete drilling setup? Explore  Drills for drilling equipment or  Drill Accessories for complementary hole-making tooling.

What Are Sutton Tools TCT Hole Cutters?

TCT means tungsten carbide tipped.

Instead of removing material across the entire diameter like a conventional twist drill, a TCT hole cutter cuts around the perimeter of the opening. The material inside remains as a central core or slug.

Sutton's industrial TCT hole-cutter design uses precision-ground tungsten carbide teeth to provide high cutting capacity across suitable materials.

Manufacturer information for the H117 range identifies applications including:

► Steel
► Stainless steel
► Aluminium
► Fibreglass
► Plastic
► Chipboard
► Other suitable abrasive materials

The design also incorporates several features that directly affect workshop use.

Precision-Ground Carbide Teeth

Tungsten carbide cutting teeth perform the actual material removal around the circumference of the hole.

This differentiates a TCT cutter from conventional bi-metal holesaw construction.

3-Flat Shank

The 3-flat shank provides positive grip inside a suitable drill chuck, helping reduce cutter slippage while torque is being transmitted through the tool.

Ejector Spring

Once the cut is complete, the centre slug needs to leave the cutter.

An ejector spring assists with automatic core ejection, reducing the need to manually dig the plug from the cutter after every hole.

Safety Stopper

Breakthrough deserves just as much attention as the start of the cut.

Sutton incorporates a safety stopper intended to help control excessive breakthrough & protect the work surface beneath the cutter.

Why Choose TCT Hole Cutters?

The real advantage of a carbide hole cutter for metal isn't simply that it has carbide teeth. It's how the complete cutting system suits the material & workload.

High Cutting Capacity

Rather than removing every piece of material inside the opening, the cutter concentrates its work around the hole perimeter.

For suitable applications, this provides an efficient way to produce larger circular openings.

Built for Demanding Materials

Sutton specifies suitable H117 TCT applications across materials including steel, stainless steel & aluminium.

That makes the range relevant to metalworking jobs where conventional general-purpose holesaws may not be the preferred option.

Hand & Stationary Drilling

Sutton identifies the industrial TCT range for use with both hand drilling & stationary drilling machines.

This allows the cutter family to move between site work & controlled workshop setups where the individual drill, chuck, cutter & workpiece are appropriate for the operation.

Extended Service Potential

Sutton states service life of up to 10 times that of standard bi-metal holesaws under suitable conditions.

That doesn't mean every TCT cutter will automatically last ten times longer on every job. Material, operating conditions, alignment, machine setup & tool treatment all influence actual service life.

Common Applications for TCT Metal Hole Cutters

Hole cutting is rarely the entire job. Usually there's a fitting, cable, fastener, component or fabricated assembly waiting for the opening.

Electrical Panels, Enclosures & Cable Entries

Electrical installation work can require accurately sized circular openings in suitable metal panels & enclosures for cable entries, glands & associated components.

For electrical trades building out their wider kit,  Electrical Tool Kits provide a relevant supporting category.

Metal Fabrication

Fabricators may use TCT hole cutters for steel or aluminium when producing openings in brackets, plates, fabricated panels, frames & workshop-made components.

Material preparation around those jobs often extends beyond drilling.  Metal Cutting & Grinding Tools cover complementary cutting & grinding processes.

Automotive Workshop Work

Automotive fabrication & repair can involve producing openings in suitable brackets, panels & modified components.

A TCT cutter gives workshops another hole-making option where the cutter specification matches the material & required diameter.

For the surrounding repair workflow,  Hand Tools For Auto Repair provide complementary workshop tooling.

Industrial Maintenance & MRO

Maintenance crews may need to modify guards, fabricate replacement components, alter mounting arrangements or produce new openings during machinery repairs.

A useful range of hole-cutter diameters can reduce the need to improvise when an unplanned modification lands on the workbench.

Emergency Worksite Breakdown Support looks at the wider challenge of keeping work moving when equipment failure interrupts operations.

Product Selection Guide – Choose the Cutter Around the Hole

Start with the finished opening rather than the cutter sitting closest to the drill.

Select by Finished Hole Diameter

Hole-cutter size refers to the diameter of the opening produced.

For example, a 25mm TCT hole cutter is selected when the job requires the corresponding finished diameter — subject to the individual product specification & application.

If a fitting, cable gland or component is going through the hole, check its required cut-out dimension rather than estimating from its external size.

Accurate positioning begins before drilling.  Measuring & Layout Tools can help with marking & checking the intended hole position.

Check Cutting Depth Separately

Cutter diameter & cutting depth are not the same measurement.

Diameter determines how wide the finished opening will be.

Cutting depth determines the thickness the cutter can accommodate within its specified operating range.

Sutton's H117 manufacturer literature specifies 25mm cutting depth for the industrial TCT holesaw range. Confirm the individual cutter specification before use rather than assuming every Sutton TCT product shares identical dimensions.

Match the Cutter to the Material

Tungsten carbide teeth don't make a holesaw universal.

Confirm that the individual cutter is intended for the material being drilled.

This matters particularly when moving between mild steel, stainless steel, aluminium & non-metallic materials, where cutting behaviour can differ considerably.

Check the Drilling Setup

A cutter suitable for stationary drilling may also be manufacturer-rated for hand drilling, but that doesn't remove the need for control.

Check:

► Drill compatibility
► Chuck engagement
► Cutter diameter
► Workpiece security
► Pilot condition
► Clearance behind the cut
► Appropriate operating conditions

TCT vs Bi-Metal Holesaws

“TCT or bi-metal?” is more useful than asking which one is universally better.

A workshop producing repeated openings in suitable metal may find the characteristics of TCT metal holesaws attractive.

For lighter, occasional or different material applications, a bi-metal holesaw may still be entirely appropriate.

Choose according to the actual job rather than the assumption that one cutting technology replaces every other option.

Expert Tips for Cleaner TCT Hole Cutting

Locate the centre accurately. A perfectly cut hole in the wrong position is still a ruined component.

Secure the workpiece before drilling. Don't rely on the cutter to hold the material steady.  Clamps & Vises provide relevant workholding options for suitable workshop setups.

Inspect the carbide teeth first. Damaged teeth can affect cutting performance before the drill even starts.

Keep the cutter square. Uneven entry can place disproportionate load on part of the cutting edge.

Let the pilot establish the cut. Accurate pilot positioning helps control where the larger cutter begins engaging the workpiece.

Respect the material. Stainless steel shouldn't automatically receive the same drilling approach used successfully on aluminium.

Avoid excessive pressure. Forcing a cutter isn't a substitute for correct machine settings, tool condition & material suitability.

Plan for breakthrough. Know what's behind the workpiece before the cutter reaches the far side.

Clear the core before restarting. Confirm that the ejector spring has released the slug & inspect the cutter before moving to the next hole.

Watch for changing cutting behaviour. Increased effort, vibration or declining cut quality can indicate a setup or tool-condition issue that deserves investigation.

For broader decisions around cutting-tool condition, The Black Print: Blade Sharpening 101 Sharpen Or Replace explores when continued use stops making practical sense.