What are the types of screw taps?

What are the types of screw taps?

1. Straight fluted tap (tap): Generally used for thread processing of ordinary lathes, CNC lathes, tapping machines, machining centers, and drilling machines. The cutting speed is slow. Divided into machine straight tap (taper) and hand straight slot tap (tap), machine tap is usually high-speed steel molar tap, suitable for tapping on machine tools, hand tap refers to carbon Tool steel or alloy tool steel rolling (or incisor) wire tapping, suitable for manual. It has strong versatility, can be processed through or without holes, non-ferrous metals or ferrous metals, and the price is cheaper. But the pertinence is also poor, and everything can be done, and nothing is done well. The cutting cone part can have 2, 4, 6 teeth, a short cone is used for non-through holes, and a 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.

2. Apex taps (taps): Apex taps (taps) are also known as screw-tap taps. It is a tapping operation for the through hole being cut, and the chips are discharged forward when the thread is processed. Its core size design is relatively large, its strength is good, and it can withstand large cutting forces. Machining of non-ferrous metals, stainless steel, and ferrous metals has a good effect, and threaded taps should be preferred for through-hole threads. The apex tap (tap) is mainly used for thread cutting of various through-hole materials. The apex tap (tap) has the same straight groove as the general hand tap, but it has a special design at the front end of the cutting part. The spiral groove is discharged from below the hole by rotary push cutting. Because the apex tap (taper) has the function of discharging the chips, in addition to keeping the groove clean to reduce the resistance during cutting, it can also avoid cutting. The blockage causes damage to the wire tap. Therefore, the apex wire tap can cut high-precision threads faster than ordinary hand taps.

3. No groove extrusion tap (tap): No groove tap (tap) is also known as chipless tap (tap). It squeezes the metal to deform it to form an internal thread, so it will not produce chips, and it will not damage the thread or tap due to chip blocking and other problems. The grooveless tap (tap) is more suitable. Plastic materials processing, such as aluminum, copper, zinc, flavonoids in low carbon steel. The cutting part of the grooveless tap has four teeth and two teeth. When using a grooveless tap, the size of the lower hole needs to be selected in accordance with its accuracy requirements in order to mold the high-precision, high-quality threads.

4. Spiral tap (tap): Spiral tap (tap) can also be referred to as spiral groove tap (tap). It is a tapping operation on the material to be cut through the hole. The spiral tap (tap) will exert its unique cutting effect to quickly and smoothly cut higher-level threads for you. The spiral tap (tap) and general hand taps The difference is that the grooves of ordinary hand taps are linear, and the spiral taps (taps) are spiral. When tapping, the spiral taps can use the ascending and rotating action of the spiral groove to easily turn the iron. Chips are discharged out of the hole to prevent iron chips from remaining or jamming in the groove, which will cause the screw breakage to break the chip. Therefore, it can increase the life of the tap and cut high-precision threads. High toughness material, not suitable for cast iron, etc. Spiral groove taps are mostly used for drilling blind holes in CNC machining centers, with fast processing speed, high precision, good chip removal, and good centering. The front of the spiral tap has a cutting groove for the processing of through holes.