Blades used in band saws come in a number of varieties. These blades have different designs, width size, tooth type, manufacturing materials and configuration. All these factors play key role in the functioning of band saw. It depends upon your own cutting requirements to choose the most appropriate blades for your band saw. Band saw blades must be durable, economical and fine in quality. You must consider the following aspects while choosing the best blades for your band saw:
Width of Blades:
When we consider the width of the band saw blades, there are two things in this respect. It depends upon your desired cutting such as contour sawing or cut-off sawing.
If you are planning contour sawing, you should use a blade with minimum width to cut the minimum radius you want. A blade of small width cuts anything in small radius.
On the other hand, if you want to do cut off sawing, you should use a blade with maximum width that machine may allow. It will provide you nice, smooth and delicate cuts. Life of wider blades is also long as compared to smaller blades. These wider blades can also resist higher deflections and material tension.
Material of Blades:
Blades of band saw are manufactured by various materials ranging from silicon steel, carbon steel, spring steel, carbon tipped to bi metal.
Thickness of Blades:
Blades continuously undergo the process of heating, cooling, stretching and relaxing. Proper thickness is very important for proper functioning. Diameter of the wheels determines thickness of blades.
Thick blades are usually used for straight cuts but they are not good at circular cuttings.
Thin blades are good to cut smaller and lighter things.
Teeth per Inch (TPI):
If you want a smooth cutting, you must use more teeth but if you want faster cutting, you must use fewer teeth but the result would be a rough cutting. If you want to do re-sawing and cut thick materials up to 8″, use coarse tooth blades (2 to 3 TPI). To cut thinner things and plastic, use fine toothed blade (18 to 32 TPI). It is fast and provides smoother cutting. For general cutting purpose, use blade (4 TPI) for fast cutting and blade (14 TPI) for slow but smoother cutting.
Style of Teeth:
There are generally three basic styles including standard, skip and hook.
Teeth are equally spaced in Standard form and it is very handy for general cutting including both the cut-off and contour sawing. Good for thin material and smooth cutting.
In Skip style, teeth are widely spaced at 0 ° rack angle. It works properly for tough metals and more thickness.
In Hook style, teeth are larger and at a positive 10° angle. It is very good to do re-sawing and cutting heavy materials. It provides the roughest finish of all the three styles.
Set of Teeth:
It describes how much the angle of teeth out.
In Raker set, first tooth is directed to the left and second to the right while third is straight tooth (Raker).
In Alternative set, patterns of right and left tooth continue and there is no straight tooth. Double Alternative plus Raker has two right and left tooth patterns with a Raker tooth between them.
In Wavy set, there are groups of right and left tooth with a straight (Raker) tooth between these groups.
Salient features of band saw blades mentioned above are very important to choose the right one for your desired cutting. Next time, you can easily check all these things when you will go to purchase band saw blades and this information will help you to decide about the best band saw blades. Keep visiting for more informative articles.