In the fields of wood processing, metal cutting, composite material processing, etc., tungsten carbide saw blades have become an important tool for efficient cutting due to their high hardness, wear resistance and high temperature resistance. However, in the face of different processing materials, how to scientifically select the number of teeth and tooth shape directly affects the cutting efficiency, section quality and saw blade life. This article will start from practical applications and analyze in detail the selection strategy of tooth shape and number of teeth.

1. Tooth shape selection: matching material properties and processing requirements

        Tooth shape is the core parameter of saw blade design. Different tooth shapes determine the sawing method, chip removal efficiency and cutting effect. The following are common tooth shapes and their applicable scenarios:

1.1 Left and right teeth (alternating teeth)

       Features: fast cutting speed, simple grinding, large rake angle, suitable for efficient cutting of wood fiber tissue.

      Applicable scenarios: Cutting and crosscutting of solid wood, particleboard, medium density fiberboard (MDF). When cutting boards with tree knots longitudinally, you can choose “dovetail teeth” with anti-rebound design.

1.2 Trapezoidal flat teeth (combination of high and low teeth)

       Features: Combination of trapezoidal teeth and flat teeth, reducing veneer cracking and making the cut surface smoother. 

       Applicable scenarios: Single/double veneer artificial boards, fireproof boards, aluminum materials (to prevent chip adhesion). High-power equipment such as computer cutting saws require precision processing to reduce edge collapse and saw marks.

1.3 Flat teeth

       Features: simple structure, low cost, but rough cut surface and slow cutting speed.

       Applicable scenarios: Rough processing or grooving of ordinary wood (need to keep the bottom of the groove flat). Aluminum saw blades with smaller diameters reduce chip sticking to the knife.

1.4 Inverted trapezoidal teeth

     Features: Prevent saw edge collapse, often used for bottom groove processing.

     Applicable scenarios: Grooving the bottom surface of double-veneer artificial boards (cooperating with the main saw to complete layered cutting).

2. Choice of number of teeth: balance efficiency and stability

     The number of teeth directly affects the number of cutting edges per unit time, and needs to be selected comprehensively based on material thickness, cutting speed and equipment performance:

      Basic principle of number of teeth :111 Thin materials (such as 0.5-3mm aluminum plate): choose a high number of teeth (120-140 teeth), small pitch, and smoother cut surface. 2.1.Medium thickness materials (3-8mm): 100 teeth are recommended to balance efficiency and chip discharge. 2.3.Thick materials (8-20mm): choose a low number of teeth (less than 80 teeth) to avoid overheating due to chip accumulation.

     Risks of too many or too few teeth :2.1.Too many teeth: It is easy to cause chip blockage, increase friction, and shorten the life of the saw blade. Need to cooperate with high-speed equipment, otherwise it is easy to cause vibration or chipping. 2.2.Too few teeth: The cut surface is rough, but it is suitable for thick materials or multi-blade saw processing with high-speed feed.

3. Analysis of practical application cases

       3.1 Woodworking Solid wood cutting: left and right teeth (outer diameter 300-350mm, thickness 3.2-3.5mm), the number of teeth is adjusted according to the hardness of the wood.

       3.2 Precision cutting of veneer: trapezoidal teeth (outer diameter 350-450mm, thickness 4.0-4.8mm), high number of teeth to reduce edge collapse.

       3.3 Metal processing Aluminum cutting: trapezoidal teeth or flat teeth, used with coolant, 80-100 teeth.

       3.4 Stainless steel/steel castings: Use impact-resistant tungsten-cobalt alloys (such as YG8-YG15, GU208-GU25), and inverted trapezoidal teeth to reduce edge collapse.

4. Conclusion

      Correctly selecting the tooth shape and number of tungsten carbide saw blades is the key to improving processing efficiency and reducing costs. By matching material properties, equipment parameters and process requirements, the performance of the saw blade can be maximized. If you need to customize special specifications or get professional advice, it is recommended to contact manufacturers such as Changzhou Zhiyu Tools Co., Ltd. to obtain targeted solutions.