All four blades fit the same 140 mm machines. That is exactly where buyers go wrong. They pick a blade by price or habit, not by duty cycle and material, and then wonder why the cut is slow, the blade wears fast, or the machine bogs down on thicker walls.
This guide breaks down the TCT 140 vs Cermet 140 decision, adds the Cermet 140 THIN and the TCT Z140 to the picture, and gives you a direct answer for each cutting situation. For background on the machines themselves, see our complete pipe saw model comparison. If you are running a 140 mm pipe saw and are not sure which blade belongs in it, read on.
Quick answer: which blade for which situation
If you cut mixed materials a few times a week from a van, the TCT 140 is your default. If you run continuous steel production cuts in a workshop, move to the Cermet 140. If your machine is stalling on thicker steel walls, try the Cermet 140 THIN. If you cut steel occasionally and want a blade matched to light duty, the TCT Z140 is the right fit.
The sections below explain why.
Three-blade comparison at a glance
The table below covers the four main 140 mm options. The Kerf column is omitted because no kerf figure is published on the product pages. The THIN difference is explained qualitatively in the section that follows.
- TCT 140 | Tungsten carbide tip | General-purpose | Best-fit duty cycle: regular site work, mixed materials | Choose this when you need one blade that handles most jobs without overthinking it
- Cermet 140 | Ceramic-metal tip | Heavy-duty production | Best-fit duty cycle: continuous or high-volume steel cutting | Choose this when throughput and blade longevity in steel are the priority
- Cermet 140 THIN | Ceramic-metal tip | Heavy-duty, reduced load | Best-fit duty cycle: continuous steel cutting where machine load is a concern | Choose this when your machine is struggling or you want less resistance per cut
- TCT Z140 | Tungsten carbide tip | Occasional cutting | Best-fit duty cycle: light or infrequent steel cutting | Choose this when cutting frequency is low and you do not need a production-grade blade
Tungsten carbide vs cermet: what the difference means in practice
The tungsten carbide vs cermet blade debate comes down to what the tip is built to withstand. Tungsten carbide is a proven, hard-wearing material that handles a wide range of pipe materials, including steel, copper, aluminium, and plastic, without needing a specialist blade for each. You can also review the full blade family comparison to see how these tip materials sit alongside every other blade type in the range.
Cermet tips combine ceramic and metallic compounds. The result is a tip that holds its edge longer under the heat and friction of continuous steel cutting. You will not notice the difference on an occasional cut. You will notice it across a full production shift.
For general contractors moving between materials, tungsten carbide covers the ground. For teams cutting steel pipe all day, cermet earns its place.
What the THIN version changes in the cut
A thinner blade body removes less material with each pass. Less material removed means less resistance, which means the motor works less hard to drive the cut. On thicker-walled steel, that reduction in load can be the difference between a machine that runs cleanly and one that bogs down or trips the overload.
The trade-off is blade rigidity. A thinner body is inherently less stiff than a standard-width blade. In most pipe cutting applications, this is not a problem, because the machine guides the blade through the cut. But it is worth knowing.
Choose the Cermet 140 THIN when your machine is showing signs of strain on heavier steel, or when you want to reduce cycle time in continuous production without changing your setup.
TCT Z140: a fourth option for occasional needs
The TCT Z140 sits alongside the TCT 140 as a tungsten carbide option, but it is positioned for occasional rather than continuous cutting. Think of it as a blade matched to low duty cycle work.
If your crew cuts pipe a handful of times a week on site, the TCT Z140 does the job without the overhead of a production-grade blade. It is not the right choice for a workshop running cuts all day, but for intermittent site work it is a practical fit.
Choosing by machine
All four blades are 140 mm and fit the same machines. The blade choice does not change which machine you can use. What changes is how hard the machine works per cut.
If your machine is running near its limits on thick-walled steel, the Cermet 140 THIN reduces the load per cut. If your machine handles your current material without strain, the TCT 140 or Cermet 140 is the right call based on duty cycle alone. For guidance on confirming the blade fits your machine, or to explore the machines that take a 140 mm blade, you can also consult our compatibility charts for a full overview.
Choosing by material
The TCT 140 and TCT Z140 handle a broad range of materials: steel, copper, aluminium, and plastic pipe. The Cermet 140 and Cermet 140 THIN are optimised for steel and heavy-duty applications.
- Steel pipe (general): TCT 140 for mixed work, Cermet 140 for production volume
- Steel pipe (thick wall, machine under load): Cermet 140 THIN
- Copper and aluminium: TCT 140, or the dedicated ALU 140 for aluminium-intensive work
- Stainless steel: INOX 140 or INOX 140 Thin, which are built specifically for stainless steel. Stainless steel deserves its own blade selection process.
- Abrasive or composite materials: Consider the Diamond X140 for specialist applications.
Steel chips tell you how to read your cut
Once a blade is running, the chips it produces tell you whether the cut is going well. Chip appearance, colour, shape, and size reflect what is happening at the tip: whether the blade is cutting efficiently or working too hard.
This is not guesswork. There is a structured way to read chip output and use it to assess blade performance and cutting conditions. If you are seeing discoloured chips, unusual chip shapes, or a cut that sounds different from normal, the chips are giving you information worth acting on.
For the full methodology, read the technical report on steel chip analysis. It is a practical reference for anyone running steel cuts regularly.
Three purchasing scenarios: find yours
The contractor cutting mixed materials a few times a week
You need one blade that handles whatever comes up on site: steel, copper, plastic, the occasional aluminium run. You do not want to carry four blades or swap one out mid-job.
The TCT 140 is the right call. Tungsten carbide handles the material range, the duty cycle matches regular but not continuous use, and you are not paying for production-grade performance you will not use. Keep a second one in the van and you are covered.
The workshop running continuous steel production cuts
Your team is cutting steel pipe all day. Blade life and throughput are what matter. Every blade change costs time, and a blade that dulls quickly under sustained load is a production problem.
The Cermet 140 is built for this. The ceramic-metal tip holds its edge longer under the heat and friction of continuous steel cutting. For high-volume steel work, this is the blade that keeps pace with the shift.
The team whose machine is stalling on thicker steel walls
Your machine is bogging down, tripping the overload, or cutting noticeably slower on heavier-walled pipe. The blade you are running may be asking too much of the motor.
Switch to the Cermet 140 THIN. Less material removed per pass means less resistance, and the ceramic-metal tip still delivers the edge retention you need for steel. It is a targeted fix for a specific load problem, not a compromise.
Order the right 140 mm blade
We supply the full range of 140 mm blades through a global distributor network. If you are not sure which blade fits your machine or your cutting programme, our support team is ready to help. Browse the full blade range to see all options, or order through your distributor to get the right blade to your site without delay.
If you have a question about a specific application, a repair, or anything else, contact us directly. We are here to help you get the right result from your machine.