DoALL Blades FAQs
DoALL Saw Blades
Toothed blades are most widely used, but there are other types. Knife edge blades slit soft, low density materials with little or no mess. Grit edge blades cut very hard, brittle, or abrasive materials.
- Carbon steel blades are usually the best choice for sawing wood, plastic, aluminum, and similar easy-to-cut materials.
- Bi-Metal blades have the best balance of heat resistance, wear resistance, and chip resistance to productively saw most steels and other metals.
- Tungsten Carbide blades provide superior heat and wear resistance for sawing extremely tough metals or very abrasive metals and non-metals.
These blades begin as a bi-metal strip produced by electron- or laser-beam welding a narrow strip of high speed steel to a wider strip of alloy steel. Teeth are cut into the high speed steel edge. The resulting blade has highly heat and wear resistant teeth and a tough, durable backing.
DoALL Bi-Metal blades include three different high speed steel edge materials and six different tooth forms. Each style was designed for a specific application. For help in making a selection, contact S.A.M. by clicking here.
In most cases, the blade should engage somewhere between six and 24 teeth in the work. Engaging fewer than three teeth can cause tooth shock and stripping. Engaging too many teeth reduces cutting rates and may lead to tooth stripping due to overfilled gullets.
The DoALL blade catalog includes a pitch selector. To request a catalog, call (888)362-5572 x 12009.
Breaking in a new band saw blade hones and strengthens ultra-sharp cutting edges and significantly increases band life.
To break in a bi-metal saw blade, run at the recommended band speed, but reduce the normal cutting rate by about half. (Make sure the band keeps pulling chips. If necessary, increase the feed force until the band does pull chips.) Cut at this reduced rate for about 20 minutes, and then increase the feed force in steps until you attain the normal cutting rate.
To break in a carbide blade, reduce both the band speed and cutting rate by 50% and begin sawing. Increase the band speed and feed force in small steps, but never allow the band to squeal or shriek.
Check the blade pitch. If the blade engages fewer than six teeth, those teeth are subject to overloading and stripping, especially under heavy feed force. If the blade engages more than 24 teeth, the chips formed may pack the relatively small gullets and strip teeth.
Any chips drawn back into the cut contribute to gullet packing and stripping. Cutting fluid must prevent chip welding, and the chip brush must clean the gullets as the blade exits the cut.
A workpiece that spins or moves in the saw vise will destroy a blade abruptly.