A cold saw blade size looks simple at first. A buyer may send one line such as 285 x 2.0 x 1.75 x 32 x 80T and ask for a quotation.
For a factory or wholesaler, that line is useful, but it is not the full story. If one number is misunderstood, the blade may not fit the machine. If the application is not confirmed, the blade may fit the machine but fail in the cut.
This guide explains how to read common cold saw blade size markings, using a real-world example from a steel cutting inquiry. The goal is simple: help you send clearer specifications, compare quotations more accurately, and avoid buying a blade that looks correct on paper but does not work well in production.
Quick example: 285 x 2.0 x 1.75 x 32 x 80T usually means 285mm outside diameter, 2.0mm kerf, 1.75mm plate thickness, 32mm bore, and 80 teeth.
Why This Matters for Cold Saw Blade Buyers
Cold saw blades are often customized by machine and application. Two blades can share the same outside diameter and tooth count, but still be different because of bore size, pin holes, plate thickness, carbide or cermet grade, tooth geometry, coating and cutting condition.
In one recent inquiry, a buyer first wrote that he wanted a 285×75 steel grade circular saw cutter. At first glance, that could mean a 285mm blade with a 75mm bore. But after the buyer sent a photo, the blade marking looked closer to 285 x 2.0 x 1.75 x 32 x 80T. Later he confirmed the bore was 32mm, not 75mm.
This is a common situation. A customer may know the general blade size, but not every technical detail. A good supplier should help check the missing points before quoting.
How to Read 285 x 2.0 x 1.75 x 32 x 80T
| Marking | Meaning | Why It Matters | What to Confirm |
|---|---|---|---|
| 285 | Outside diameter, 285mm | Controls machine compatibility and cutting depth. | Machine capacity and guard clearance. |
| 2.0 | Kerf / cutting width, 2.0mm | Affects cutting load, chip width, material loss and heat. | Whether the machine and material can handle the cutting load. |
| 1.75 | Plate or body thickness, 1.75mm | Affects stiffness, vibration resistance and blade stability. | Whether the blade body is strong enough for the application. |
| 32 | Bore / arbor hole, 32mm | Must fit the spindle accurately. A wrong bore can make the blade unusable. | Bore diameter, pin holes, pin-hole diameter and PCD. |
| 80T | 80 teeth | Controls chip load, finish, cutting speed and heat generation. | Material shape, wall thickness, solid bar diameter and feed condition. |
OD: Outside Diameter
The outside diameter is the full diameter of the blade. In the example above, 285 means the blade is 285mm across.
Outside diameter must match the machine. If the blade is too large, it may not fit the guard or machine capacity. If it is too small, it may not reach the required cutting depth. For steel cutting, the machine design, spindle speed and clamping system matter just as much as the blade diameter.
If you are replacing an old blade, the easiest way is to send a clear photo of the current blade marking and a photo of the machine.
Kerf: Cutting Width
Kerf is the width of the cut made by the blade. In 285 x 2.0 x 1.75 x 32 x 80T, the kerf is usually 2.0mm.
A thinner kerf can reduce cutting resistance and material waste. But the blade still needs enough strength and stability. For steel solid bar cutting, choosing a kerf only because it is thin can create problems if chip evacuation, body thickness and machine rigidity are not suitable.
For a quotation, kerf helps the factory understand the cutting load and whether the existing specification is a light-duty, standard, or heavier-duty design.
Plate Thickness: Blade Body Thickness
Plate thickness, sometimes called body thickness, is the thickness of the steel body before the tooth tip creates the cutting width. In this example, 1.75mm is the plate thickness.
The relationship between kerf and plate thickness matters. A blade with 2.0mm kerf and 1.75mm plate leaves side clearance for cutting. If the body is too thin for the job, the blade may vibrate or wander. If the body is too thick for the machine, cutting load can increase.
For high-volume steel cutting, the body material, heat treatment, flatness and runout control are part of the real product value.
Bore: The Center Hole
The bore is the center hole that fits the machine spindle. In the example, 32 means 32mm bore.
This is one of the easiest places to make a mistake. Some buyers send a blade size as 285×75, but later the photo shows that 75 was not the bore, or the actual bore was different. A wrong bore means the blade may not mount correctly.
For cold saw blades, bore is often not enough by itself. Many machines also need pin holes. Please confirm:
- Bore diameter
- Number of pin holes
- Pin-hole diameter
- PCD, which means the pitch circle diameter of the pin holes
- Any special slot or mounting requirement
If you do not know the pin-hole data, send a clear photo of the blade center hole area with a ruler or caliper nearby.
Teeth: What Does 80T Mean?
80T means the blade has 80 teeth.
More teeth does not automatically mean better. Tooth count should match the material shape and thickness. Solid bar, tube, profile, stainless steel and aluminum may need different tooth geometry even when the blade diameter is the same.
For solid bar cutting, the blade needs enough chip space and tooth strength. For thin-wall tube, the tooth entry is different and vibration becomes more important. For stainless steel, heat control and grade selection become more sensitive.
Size Code Does Not Tell the Whole Product
A size marking tells us the physical dimensions, but it does not tell us the full blade design. Before a serious quotation, we still need to know the application.
| Missing Detail | Why It Changes the Blade |
|---|---|
| Material | Mild steel, stainless steel, hard steel, aluminum and copper do not use the same cutting logic. |
| Material shape | Solid bar, tube, profile and plate need different tooth support and chip control. |
| Machine RPM | Speed affects heat, finish, chip shape and blade life. |
| Coolant or dry cutting | Coolant condition affects grade, coating and heat management. |
| Carbide or cermet grade | Carbide is often safer for uncertain conditions. Cermet can be strong when machine and material are suitable. |
| Target result | Fast cutting, clean finish, low burr and long life may require different choices. |
What to Send Before Asking for a Quote
If you want a supplier to quote accurately, send more than the size line. The fastest professional way is to send photos and a few short answers.
- Current blade marking, for example 285 x 2.0 x 1.75 x 32 x 80T.
- Photo of the full blade.
- Close-up photo of the bore and pin holes.
- Machine photo or machine model.
- Material being cut, such as mild steel, stainless steel or aluminum.
- Material shape and size, such as solid bar diameter, tube wall thickness or profile shape.
- Dry cutting or coolant cutting.
- Trial quantity and expected regular quantity.
- Destination country or city for freight checking.
If you are not sure about some details, that is normal. Send photos or a short video first. A good supplier should be able to help identify what is missing.
A Practical First-Sample Approach
When machine details are not fully confirmed, we usually do not recommend pushing the most expensive blade first. A safer approach is to start with a stable sample grade based on the current blade marking and material photo.
For example, if the buyer cuts mild steel solid bar with a 285mm 80T blade but does not know the machine RPM, a stable carbide grade may be a better first test than an aggressive premium cermet grade. After the test result, the tooth geometry, grade, coating or body design can be adjusted.
This approach helps wholesalers protect their customer relationship. The goal is not only to sell a blade. The goal is to help the buyer reduce complaints, improve cutting stability and build repeat orders.
Related Guides and Product Pages
- Steel Cutting Cold Saw Blades – product page for carbide and cermet cold saw blades.
- Product Catalog – select by product family, application, machine and material.
- Why Saw Blade Prices Differ – understand why same-size blades can have different costs.
- Contact Wryno Global – send blade photos and material details for a recommendation.
FAQ
What does 285 x 2.0 x 1.75 x 32 x 80T mean?
It usually means 285mm outside diameter, 2.0mm kerf, 1.75mm plate thickness, 32mm bore and 80 teeth.
Is bore size the same as outside diameter?
No. Outside diameter is the full blade diameter. Bore is the center hole that fits the machine spindle.
Is more teeth always better?
No. Tooth count should match material shape, wall thickness, feed condition and cutting result. Too many teeth can reduce chip space and increase heat.
Can I quote from size only?
You can make a rough quotation from size, but a professional quotation should also confirm material, machine, bore, pin holes, cutting method and quantity.
What if I do not know the full specification?
Send photos of the current blade, bore area, machine and material. We can help identify the missing details before recommending a blade.