The classification of screw taps
1. different driving: screw taps by hand and screw taps by machine
2. according to the processing methods: cutting taps and extruded taps
3. according to the processed threads: metric coarse toothed tap, metric fine tooth tap, pipe thread tap, etc.
Straight slots taps:
It has the most versatility. The cutting part can have 2, 4 and 6 teeth. The short cone is not used for through hole, and the long cone is used for the through hole. As long as the bottom hole is deep enough, the cutting cone should be selected as long as possible..
Spiral groove taps:
More suitable for machining thread hole,There are some experiences: when to machining black metal, small spiral angle need to be selected , It is about 30 degrees to ensure the strength of spiral teeth. The larger the helix angle chosen for processing non-ferrous metals can be around 45 degrees, and the cutting is sharper.
Screw taps:
When the thread is machined, the chip is discharged forward and the threaded hole should be preferred.
Next Article:What is need in the CNC machining?
