Which Bandsaw Blade Should You Choose? Width, TPI and Uses
Choosing a bandsaw blade is not simply a matter of finding a blade with the correct length. Two blades that are compatible with the same machine can behave very differently depending on their width, thickness and tooth configuration.
A blade that is ideal for resawing a thick board will generally be poorly suited to cutting tight curves. Conversely, a narrow blade designed for curved cuts will not necessarily be the best choice for long, straight cuts.
Choosing the right tooth pitch is just as important. A tooth pitch that is too fine for thick timber may struggle to clear sawdust and chips efficiently, while a very coarse tooth pitch will generally be less suitable for thin workpieces.
So, which bandsaw blade should you choose for woodworking? In this guide, Probois Machinoutils explains the main criteria to consider when choosing a blade that is suitable for your machine and, above all, for the type of work you want to carry out.
Key point: there is no single universal blade that is ideal for every job. The right blade must first be compatible with your bandsaw and then suited to the type of cut, the thickness of the timber and the radius of the curves you want to make.
Before Anything Else: Check the Blade Sizes Accepted by Your Bandsaw
Before choosing the tooth pitch or blade width, always start by checking the specifications of your machine.
The bandsaw manual should normally specify the compatible blade dimensions, including:
- the required blade length;
- the acceptable minimum and maximum blade width;
- the permitted or recommended blade thickness, depending on the machine.
The blade length must of course correspond to the size specified for the machine. Even a seemingly small difference can make it impossible to tension the blade correctly if it exceeds the adjustment range provided by the manufacturer.
You should also avoid automatically fitting the widest blade available: the machine must be designed to accept it.
Important: never choose a blade simply because its length matches your machine. Its width and thickness must also be compatible with the specifications of your bandsaw.
1. Blade Width: Straight Cuts or Curved Cuts?
The width of a bandsaw blade is one of the first characteristics to choose according to the type of work you intend to carry out.
As a general rule, a relatively wide blade provides greater lateral rigidity and is particularly suitable for straight cuts and resawing.
A narrow blade, on the other hand, can follow a tighter radius. It is therefore better suited to cutting shapes and curves.
A simple rule to remember is:
- Straight cuts: choose a relatively wide blade, within the limits specified for the machine.
- Large curves: a medium-width blade may be suitable.
- Tight curves: use a narrower blade that is compatible with the machine.
Generally, the smaller the radius you want to cut, the narrower the blade needs to be.
However, there is no reason to choose an extremely narrow blade when the work does not require it. For a long, straight cut through a thick workpiece, a wider blade will generally be more suitable.
2. Why Does a Narrow Blade Allow Tighter Curves?
When a blade follows a curve, it must be able to change direction progressively within the kerf.
A wide blade has a greater distance between its front and rear edges. It therefore has less ability to follow a significant change in direction.
A narrow blade has greater freedom to follow a curved path.
This is why curved and contour cutting is generally carried out using relatively narrow bandsaw blades.
However, remember that a bandsaw blade should never be forced sideways in an attempt to make it follow a curve that is too tight.
If the required radius is smaller than the blade width can reasonably achieve, the blade may twist in the kerf, overheat or move away from its intended cutting path.
3. For Straight Cuts, Should You Always Choose the Widest Possible Blade?
For long straight cuts or resawing timber, a relatively wide blade generally offers an advantage: its lateral rigidity helps it maintain a stable cutting path.
However, this does not mean that you should automatically fit the widest blade you can find.
The blade width must remain within the limits specified by the bandsaw manufacturer.
In addition, a wide blade that is blunt, incorrectly tensioned or fitted with an unsuitable tooth pitch may perform worse than a correctly selected and properly adjusted blade.
For good straight-cutting performance, several factors must work together:
- appropriate blade width;
- correct blade tension;
- tooth pitch suited to the thickness of the timber;
- correctly adjusted blade guides;
- a blade in good condition;
- a reasonable feed rate.
4. Understanding the Number of Teeth on a Bandsaw Blade
The tooth configuration of a bandsaw blade can be described by the number of teeth per inch, commonly expressed as TPI (Teeth Per Inch).
The higher the TPI, the more closely spaced the teeth are. Conversely, a lower TPI means that the teeth are spaced farther apart.
Your choice should not be based solely on achieving the finest-looking cut possible.
The teeth must also be able to penetrate the timber effectively and clear the sawdust and chips produced during cutting.
5. Why Can a Tooth Pitch That Is Too Fine Cause Problems in Thick Timber?
Each tooth on the blade has a space in front of it, known as the gullet, which helps collect and carry sawdust and chips out of the kerf.
When a very fine-toothed blade passes through a thick workpiece, a large number of teeth are engaged in the timber at the same time.
The available gullets may then become insufficient for the volume of material being removed.
Possible consequences include:
- poor sawdust and chip clearance;
- increased cutting resistance;
- blade overheating;
- reduced cutting speed;
- a tendency to push the workpiece harder;
- reduced cutting quality.
For resawing thick timber, a relatively coarse tooth pitch is therefore often preferable.
Common mistake: assuming that “the more teeth, the better the cut”. In thick timber, a tooth pitch that is too fine can actually make sawdust and chip clearance much more difficult.
6. Why Is a Very Coarse Tooth Pitch Not Ideal for Thin Workpieces?
The opposite problem can occur when a very coarse-toothed blade is used to cut a thin workpiece.
Very few teeth may then be engaged in the material at the same time.
Cutting can become more aggressive and may produce more vibration or snagging, depending on the material and cutting conditions.
For relatively thin workpieces, a finer tooth pitch generally allows more teeth to remain engaged in the material at the same time.
The choice therefore involves finding the right balance between:
- the number of teeth engaged in the material;
- the ability to clear sawdust and chips;
- the desired cutting speed;
- the required quality of finish.
7. Which TPI Should You Choose According to the Thickness of the Timber?
There is no single universal TPI value that is suitable for every timber species, every machine and every tooth geometry.
However, a useful principle is to keep several teeth engaged in the material at the same time, while avoiding having so many teeth in the cut that sawdust and chip clearance becomes difficult.
For a straight cut through thick timber, you will therefore generally choose a coarser tooth pitch than you would for a thin workpiece.
| Type of Work | Recommended Blade | Important Point |
|---|---|---|
| Resawing a thick board | Relatively wide blade with a coarse tooth pitch | Prioritise blade stability and efficient chip clearance |
| Long straight cuts | Relatively wide blade | Choose the tooth pitch according to timber thickness |
| Cutting large curves | Medium-width blade | Check the minimum achievable radius |
| Cutting tight curves | Narrow blade | Never force the blade sideways |
| Cutting a thin workpiece | Relatively fine tooth pitch | Keep enough teeth engaged in the material |
| Cutting very thick timber | Coarser tooth pitch suitable for resawing | Efficient sawdust and chip clearance becomes essential |
These recommendations are general principles. The final choice must take into account the blade dimensions accepted by the machine, tooth geometry, timber species and the blade manufacturer's recommendations.
8. Blade Thickness: An Important Factor That Should Not Be Overlooked
The thickness of a bandsaw blade should not be chosen independently of the machine.
Every time the blade passes around the wheels, it is alternately bent and straightened.
The diameter of the wheels therefore influences the bending stresses placed on the blade.
This is one reason why an excessively thick blade is not necessarily suitable for a small bandsaw.
A blade that does not match the specifications intended by the manufacturer may be subjected to excessive stress and may have a reduced service life.
Always respect the blade dimensions recommended for your machine.
9. Should You Choose a Fine Tooth Pitch for a Cleaner Cut?
This is a common assumption, but it needs to be qualified.
A finer tooth pitch can indeed improve the appearance of certain cuts, particularly in relatively thin workpieces. However, simply increasing the number of teeth does not improve the result indefinitely.
If the tooth pitch becomes too fine for the thickness being cut, sawdust and chip clearance deteriorates and the blade may overheat or lose cutting efficiency.
Cut quality also depends on:
- the sharpness of the blade;
- the consistency of the tooth set;
- blade tension;
- blade guide adjustment;
- feed rate;
- the type of timber.
It is therefore better to choose the tooth pitch that suits the job rather than simply choosing the blade with the highest number of teeth.
10. Why Can a Blade Cut Crooked Even When Its Dimensions Are Correct?
You have chosen the correct length, an appropriate width and a tooth pitch suited to the work, but the bandsaw still does not cut straight?
The choice of blade is not necessarily the cause.
A drifting or crooked cut may be caused by:
- a blunt blade;
- an uneven or damaged tooth set;
- incorrect blade tension;
- incorrectly adjusted or worn blade guides;
- damaged wheel tyres;
- incorrect blade tracking on the wheels;
- an excessive feed rate.
A new blade does not completely rule out a blade defect either, but it is important to check the entire machine before reaching that conclusion.
11. Can You Use the Same Bandsaw Blade for Every Job?
Technically, a general-purpose blade can be used for several different types of cuts. However, if you use your bandsaw regularly, keeping several blades suited to your main types of work offers a real advantage.
For example:
- a wide blade with a suitable tooth pitch for resawing and long straight cuts;
- a medium-width blade for general-purpose work;
- a narrow blade for curved cuts.
Changing the blade takes a few minutes, but it allows you to make much better use of your machine's capabilities.
Probois tip: if you use your bandsaw for very different types of work, it is better to keep two or three suitable blades rather than trying to find a single blade that is supposed to do everything.
12. How to Choose a Bandsaw Blade in 5 Steps
To avoid getting lost among the many blade sizes and tooth configurations available, follow these five steps:
- Identify your machine and check the required blade length.
- Check the permitted blade width and thickness in the manufacturer's documentation.
- Determine the type of cut: straight cutting, resawing, curved cutting or contour work.
- Consider the thickness of the timber to select a tooth pitch that provides good chip clearance while keeping enough teeth engaged in the material.
- Choose the appropriate blade from the dimensions permitted by your machine.
This method is more reliable than choosing a blade based solely on its length or the advertised number of teeth.
Frequently Asked Questions About Choosing a Bandsaw Blade
Which bandsaw blade should I choose for cutting thick timber?
For resawing thick timber, a relatively wide blade is generally preferred, within the limits specified by the machine, combined with a sufficiently coarse tooth pitch to allow efficient sawdust and chip clearance.
Which bandsaw blade should I choose for cutting curves?
Generally, the tighter the curve, the narrower the blade needs to be. The minimum achievable radius depends on the width and characteristics of the blade. Never force a wide blade sideways in an attempt to make it follow a curve that is too tight.
Does a wider bandsaw blade cut straighter?
A relatively wide blade generally provides greater lateral rigidity and is therefore well suited to long straight cuts and resawing. However, cutting quality also depends on tooth pitch, blade condition and correct machine adjustment.
Does a bandsaw blade cut better if it has more teeth?
No. A fine tooth pitch can be useful for certain thin workpieces, but it can become a disadvantage in thick timber because of the volume of sawdust and chips that must be removed. The correct tooth pitch is the one suited to the work being carried out.
Why does my bandsaw blade get hot during cutting?
Excessive heat can be caused by a blunt blade, unsuitable tooth pitch, excessive feed rate, incorrect adjustment or abnormal friction. If the blade becomes unusually hot, stop the machine and investigate the cause.
Can I fit a thicker blade to make it stronger?
Not necessarily. A blade that is too thick for the wheel diameter or the specifications of the machine may be subjected to excessive bending stress. Always use blade dimensions that comply with the manufacturer's recommendations.
In Summary: Which Bandsaw Blade Should You Choose?
Choosing the right bandsaw blade for woodworking depends on several factors that must be considered together.
For straight cuts and resawing: choose a relatively wide blade that is compatible with the machine and select the tooth pitch according to the thickness of the timber.
For curved cuts: reduce the blade width as the required curve radius becomes smaller.
For thick timber: pay particular attention to sawdust and chip clearance and avoid an excessively fine tooth pitch.
For thin workpieces: a finer tooth pitch generally allows more teeth to remain engaged in the material at the same time.
Finally, remember that even a high-quality blade can only perform at its best on a properly adjusted and well-maintained bandsaw.
At Probois Machinoutils, we offer bandsaw blades in a wide range of sizes, as well as spare parts for the maintenance and repair of various bandsaw brands and models.
Before ordering a blade, always check its length, width, thickness and tooth pitch, as well as the blade dimensions accepted by your bandsaw.