Are more teeth on a saw blade better?

In this blog post, you’ll read:Many users are troubled by the choice of jagged teeth. They don't know what the number of teeth is reasonable. The selection is very important. What will happen if you choose the wrong number of teeth? It will cause the cutting surface to be not smooth, not durable, broken, sticky, plugged, chipped, etc. Therefore, users need to ask professional saw blade manufacturers.

Aluminum alloy saw blade

Some customers reported that it is difficult to choose the number of teeth for aluminum alloy saw blades: if it is too much, the cutting will stick to aluminum and have large burrs; if the number of teeth is less, the cutting surface is not smooth and sharp. Because of the different thickness of aluminum profiles, the number of teeth of the aluminum alloy saw blade used is different.

The cutting of aluminum alloy profiles needs to be achieved by the high-speed rotation of the aluminum alloy saw blade, and its sharpness is mainly on the teeth of the saw blade. In theory, the denser the number of teeth of the saw blade, the better its sharpness and the smoother the cutting surface, but in fact there are many restrictions. Based on years of experience in sawing, our company’s technicians will teach you how to correctly select the number of teeth of aluminum alloy saw blades. Due to the complex cutting materials, there are many specifications of aluminum alloy saw blades. The following is an example of cutting aluminum plates with commonly used aluminum alloy saw blades of 500mm outer diameter:

The number of teeth of the aluminum alloy saw blade is related to the diameter of the saw blade, the shape of the material to be cut, and the diameter of the workpiece. Generally speaking, the number of teeth are respectively: 50/60/80/100/120/140

For example:

Aluminum alloy saw blades cut aluminum with a thickness of 0.5mm-3mm, generally 120 teeth or 140 teeth.

Aluminum alloy saw blades cut aluminum with a thickness of 3mm-8mm, generally with 100 teeth.

Aluminum alloy saw blades cut aluminum with a thickness of 8mm-20mm, generally with 80 teeth.

Aluminum alloy saw blades cut aluminum with a thickness of 20mm-160mm, generally 60 teeth.

When the thickness of the aluminum profile is irregular, the number of teeth of the aluminum alloy saw blade should be selected according to the thickest part of the aluminum profile.

The correct choice of the number of teeth of the aluminum alloy saw blade does not mean that there will be no problems such as aluminum jamming, aluminum sticking or tooth bursting. Friendly reminder, it must be equipped with a micro-lubrication system to truly avoid the above problems.

Copper saw blade

Recently, some customer are asking if there are more teeth or fewer teeth for cutting copper saw blades? The number of teeth of the saw blade plays a vital role in the cutting process, and the number of teeth is determined by the outer diameter of the saw blade, and the thickness and diameter of the cutting material.

In fact, in the actual cutting process, the saw teeth are too dense, and the amount of chipping between the teeth becomes small, which is easy to cause the saw blade to heat up. In addition, the saw blade has too many teeth. When the feed rate is not matched properly, the cutting amount of each tooth is very large. Less, it will increase the friction between the cutting edge and the workpiece, and affect the service life of the blade. Usually the tooth spacing is 15-25mm, and a reasonable number of teeth should be selected according to the material to be sawed.

Usually we cut red copper, generally we look at the cutting equipment, and then we recommend the customer what kind of saw blade to use. The material of the saw blade is different, and the number of teeth of the saw blade is also different. The saw blade that is usually used for red copper is hard. There are two types of alloy saw blades and overall tungsten steel saw blades. The equipment used for these two saw blades is different, and the same cutting size, the direct red copper rod, the carbide saw blade has more teeth than the overall tungsten steel saw The number of teeth of the blade is small, so if you still don’t know how to choose a saw blade, you can first understand these in the early stage before purchasing a saw blade that suits you.

Woodworking saw blades

Let’s take a look at the selection of the number of teeth of woodworking saw blades by the way.

The selection of the number of teeth of woodworking saw blades can be divided into the following two situations:

1. When woodworking saw blades need to be slit

When woodworking saw blades need to be slit, the saw blades with different outer diameters and fewer teeth can be selected, the cutting resistance is small and the efficiency is high, and the operation is smooth.

2. When woodworking saw blades need to be crossed

Saw blades with more teeth in different outer diameters can be selected, with high cutting accuracy and smooth cutting surface. Woodworking saw blades can choose saw blades with different outer diameters and moderate numbers of teeth when taking into account both longitudinal cutting and cross-section. Ladder flat tooth profile is optional for density board and veneer.

But we can’t just look at the number of saw teeth, we have to measure it with the diameter of the saw blade. To determine the number of teeth of a saw blade, the upper diameter must be considered. A 150-diameter saw blade with 60 teeth is considered dense, but a 500-diameter saw blade with 60 teeth is even less. So you can select the number of teeth according to the material to be cut. Normally, when a saw blade with dense teeth cuts the right amount of thickness, the cut made by a saw blade with fewer teeth will have a better clean and smoother cut. However, if the cutting material is too thick, it may happen that the cutting is not smooth and the teeth are stuck. So you don’t need to worry about the number of teeth of the saw blade, just choose the saw blade according to your own material.

So how to distinguish the pros and cons of woodworking saw blades? We introduce to you the characteristics of high-quality and low-quality sawtooth so that you can distinguish:

1. High-quality sawtooth:

  • High cutting precision and neat cutting seams.
  • Smooth cutting surface and low cutting noise.
  • The matrix is not deformed, and the cutting life is long

2. Inferior sawtooth:

  • The cut seams are not straight and uneven.
  • The cutting surface has large knife marks and high cutting resistance.
  • The saw blade has large vibration and noise.
  • Howling, chipping, broken teeth, tooth loss, deformation, short service life.

What you need to pay attention to when using woodworking saw blades:

1. Before use, confirm whether the saw blade is worn or not. If it is damaged, it is strictly prohibited to use it.

2. When installing, pay attention to keep the arrow direction marked on the saw blade consistent with the rotation direction of the tool used.

3. When cutting, please do not apply pressure and curve cutting, and the knife should be stable.

4. When dry cutting, do not cut continuously for a long time, remember to cool intermittently; for wet cutting, add water to cool. Beware of leakage.

5. The cutting machine must have a safety protective cover, and the operator must wear safety clothing, glasses and other protective equipment.

Regarding the selection of the number of teeth, we need to pay attention to the number of teeth that do not represent the grade. It depends on the material you cut that is suitable for more or fewer teeth. If the number of teeth is more, the saw is slow but the saw edge is smooth, and if the number of teeth is less, the saw is faster but the saw edge is rough. You must make a flexible choice according to the actual situation.