Q & A
Saws and Cutting tools Buying Guide - How to choose the right saws and cutting tools.
TPI is an acronym for Teeth Per Inch and is measured from gullet to gullet, not tooth tip to tooth tip. In general, a saw with more teeth per inch cuts slower but leaves a cleaner finish; a saw with less teeth per inch cuts faster but leaves a rougher finish. Besides, the more teeth per inch a saw has, the harder materials the saw can cut through.
Sawteeth are ground in three different angles so they are called triple ground teeth. A saw with triple ground teeth can provide smoother and more efficient cuts than a traditional saw with double ground teeth because it has sharper teeth and smoother gullets.
Impulse hardening is the modern method of creating a saw blade with a long working life.The teeth are hardened by means of wave impulses with a very high peak power and a special high frequency. It means sawteeth will stay sharper for longer.
As a general rule, a thicker blade is firmer so higher precision and better cutting performance can be expected; a thinner blade features its flexibility so it's better to choose a thin blade if you want flush cuts or thinner cuts.