3 types oftaps

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3 types oftapsin a set

Hand taps are usually two or three taps, usually made of alloy or carbon steel and tool steel with a square end, and are cut with a special wrench. These two can be used interchangeably in the production process, but individual cases are not possible, as follows:

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Types oftapsin workshop

If the tapping is below M2, it is better to choose the hand tap with good material. When tapping with machine taps, the cutting volume is large, plus if the material toughness is large, it is easy to twist off the taps, while using manual taps is the second time to finish tapping, and each time the cutting volume is relatively small and tapping accuracy is high, so it is better to use manual taps.

Cobalt-containing drills are simply the high-speed steel drills containing cobalt. Adding cobalt can improve the high temperature resistance of the drill and make it more wear-resistant.

3 types oftapsand their uses

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Four types oftaps

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Types oftapspdf

Cobalt drill bits are also high speed steel drill bits. In fact, the raw material for cobalt drill bit is high speed steel material, but not all high speed steel drill bits can be called cobalt drill bits. There are two types of hss drill bits contain cobalt. M35 and M42, They all have cobalt properties in their materials. M35 has a cobalt content of 5%, and M42 has a cobalt content of 8%. Cobalt is used to produce heat-resistant alloys, hard alloys, and anti-corrosion alloys. An important raw material for magnetic alloys and various cobalt salts.

The hardness of M35 drill bit is usually HRC65-67, and the hardness of M42 drill bit is usually HRC67-70. The price of M35 material is lower than that of M42. These two high-speed steels are more durable than the general-purpose HSS6542 or HSS9341 (hardness 63~66HRC), but the toughness is reduced.

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Generally we are accustomed to call the high speed steel grinding taps with high manufacturing accuracy as machine taps. In fact, the working principle of machine taps and hand taps is basically the same.

The drill bits made of M35 and M42 materials are called cobalt drill bits. Because of their high hardness, good toughness and reasonable price, they are used as special stainless steel drill bits in the machining industry. Choose a drill bit between the two. When conditions permit, the M42 drill bit is preferred.

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