Selection of saw blades for band saw type wood cutting machines

The selection of saw blades for band saw wood cutting machines requires a comprehensive consideration of multiple factors such as material, tooth profile, tooth pitch, specification and hardness. The following is a specific analysis:

Material selection

Common materials for band saw blades include carbon steel saw blades, bimetallic saw blades and carbonized alloy saw blades, etc. Carbon steel saw blades are economical and can remain sharp for a relatively long time. The serrated part of the bimetallic saw blade is made of harder steel material, which keeps it sharp for a longer time, but the price is relatively higher. The sawtooth part of the carbonized alloy saw blade contains a small amount of carbonized alloy, which can maintain sharpness for a relatively long time. However, it is expensive and has a wide width, making it not very suitable for many curve saws. It is usually used for slicing and sawing thicker wood. In addition, there are alloy band saw blades, Stellite band saw blades, etc. Ordinary alloy band saw blades are generally used for cutting common wood. The teeth of the Stellite band saw have high hardness and good toughness, making it suitable for cutting relatively hard wood.

Tooth profile selection

The selection of tooth profile is of vital importance. An incorrect tooth profile can easily lead to premature chipping of the saw teeth. Common tooth shapes include pointed teeth, pull-resistant teeth, and turtle-back teeth, etc. The pointed tooth profile has a larger capacity chip groove and a higher chip removal capacity, making it more suitable for continuous sawing of solid materials. Tensile teeth are specifically designed for impact-type materials, such as thin-walled tubes, Angle irons, channel steels, H-shaped steels, etc. Generally, the wall thickness of the materials to be cut does not exceed 10mm. The turtle back teeth are suitable for specific working conditions. In addition, there are skip teeth, similar to hook teeth. Their characteristic is that the straight teeth are at a 90-degree Angle, and there is an acute Angle at the connection between the teeth and the tooth grooves. They are used for breaking debris and are suitable for soft metals, non-ferrous metals, plastics and wood.

Pitch selection

Pitch is the distance between one tooth tip and the next. For cutting thin material parts, a thin pitch (more teeth) is required, while for thick parts, a thick pitch (fewer teeth) is needed. Strive to have at least three teeth at the cut. For example, 3/4 teeth refer to a minimum of 3 teeth and a maximum of 4 teeth within 1 inch. If the verticality of the cross-section is required to be high, a saw blade with a smaller pitch should be selected. To maximize the cutting life, the selection can be made based on relevant research conclusions and sawing experience. This is because a larger tooth profile requires less cutting force and feed force, which can prevent skew failure.

Specification selection

The specifications mainly include the width, thickness and length of the saw blade. Common widths include 19mm, 25mm, 38mm, etc. The thickness is generally around 0.9mm to 1.2mm. The length varies according to different models of band saw machines. The longer the saw blade is and the wider its width is, the longer its service life will be, the higher the cutting efficiency will be, and the greater the cutting volume will be. When making a choice, you can examine the specifications of the standard saw blades of the sawing machine. Try to select a sawing machine that uses wider saw blades, as these sawing machines have larger saw wheels, wider saw blades and a longer service life.

Hardness selection

The saw blade should be selected according to the type and hardness of the wood. For softwood, a wider saw blade with a larger pitch can be used, while for hardwood, a narrower saw blade with a smaller pitch is required to ensure the cutting effect and the lifespan of the saw blade.