The difference between spiral flute tap and straight flute tap
Release time:
2024-07-03
Straight groove tap use: generally used for ordinary lathe, drilling machine and tapping machine thread processing, cutting speed is slow.
In the processing of high hardness materials, materials that are easy to cause tool wear, cutting powdery materials and through-hole blind holes with short tapping depth have a good effect.
It has strong versatility, through hole or non-through hole, non-ferrous metal or ferrous metal can be processed, and the price is also *. However, the pertinence is also poor. Anything can be done and nothing can be done. The cutting cone part can have 2, 4, and 6 teeth, the short cone is used for non-through holes, and the long cone is used for through holes. As long as the bottom hole is deep enough, you should try to choose a longer cutting cone, so that more teeth share the cutting load, and the service life is longer.
The difference is that they are not the same way when processing threads.
The chip removal method of the spiral flute tap is upward (opposite to the processing direction), which is suitable for through hole/blind hole thread processing.
The chip removal mode of straight fluted tap is downward, which is suitable for processing with through holes.
Straight groove tap is a general-purpose tap, simple to manufacture, cheap, can be processed through hole or not through hole, non-ferrous metal or ferrous metal materials, but the pertinence is poor, suitable for processing requirements of non-precision ordinary thread.
Spiral flute tap is more suitable for processing non-hole thread, processing chips backward discharge. Due to the helix angle, the actual cutting rake angle of the tap will increase with the increase of the helix angle. Under normal circumstances, the processing of ferrous metal, the spiral angle is selected to be smaller, generally about 30 degrees, to ensure the strength of the spiral teeth. For processing non-ferrous metals, the helix angle should be larger, which can be around 45 degrees, and the cutting should be sharp.
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2024-07-03
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