Wood cutting Saw Blades
When purchasing equipment that uses circular saw blades this article aims to have circular saw blades explained and to enlighten what to look at when making the purchase.
To be able to have a good cut in woodworking projects it is essential to have the correct saw all blades for the job. Not only the correct saw blade but it must be sharp and clean to be able to cut without tearing and possible not burning the piece being cut.
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Saw Blade Types
There are two main circular saw blades types snd these are for rip sawing with the wood grain and cross cut for cutting across the grain.
Rip Saw blade
This type of blade has fewer teeth and this gives a deeper gullet on the blade which allows it to clear the saw dust material away. The rip saw blade doesn’t give a clean finish but will allow the wood to be cut fast.
Cross Cut Blade
When cutting wood across the grain the structure of the saw blade is such that the alternate teeth of the blade are set off from the centre of the blade.
This means they cut with a kerf, circular saw blade thickness, and have a chisel action of cutting which produces a much finer finish, they also have more teeth than and so have a slower cutting rate than a rip saw bade.
This is common type of blade that is capable of performing cross cut and rip saw cuts, it is available in a variety of number of teeth.
The fewer the number the more aggressive the cut and rougher the finish.
So if the finish required is cleaner then the tooth count must be higher but the cutting speed is slower, ending with a trade off finish or cutting speed.
These are a speciality blade the is designed to stack several blades together to perform a dado.
They are more for the operator to cut repetitive dadoes, just to cut a few then it is better to make several passes, time consuming but much cheaper than buying special blades that may be only used occasionally.
Dado saw blades for circular saws, are only for use with a table saw or a radial saw arm.
There is a variety of blade sizes ranging from around 4” or 5” up to a very large size for commercial usage.
But for the home woodworker the sizes will be concentrated on:
So whatever saw being used the handbook will recommend the best saw blade size to be used.
Saw Blade Care
With use a saw blade will naturally become dull and require to be sharpened. If carried out by a professional saw sharpener and this will make the blade to carry on working again like new.
Another reason for the blade not performing is if it has been used to cut wood that has a high pitch content then the blade can become ineffective.
If the saw blade has become very dirty then the recourse is to purchase some commercial blade cleaners and remove the material causing the problem.
Burn marks can be caused by the dirt build up or if the fence and the saw blade are not set parallel.
This can cause the piece being cut to be push at an angle to the saw blade this will allow a rubbing action and may even result in a kick back.
Feed Speed of Wood
There are some woods that are subject to scorching/burning if the feed speed is incorrect, such as soft maple or cherry. They tend to require to be fed a little faster than normal, but it is necessary to establish the correct speed with practice.