Classification of core bits

Mar 19, 2023

What is a core drilling bit?

Core bits are mainly used to drill holes in steel plates and other products.

Core drilling bits, also called hollow bits, are mainly used for drilling steel plates and other products, and hollow bits are used with machines that specialize in core drilling bits, which have the characteristics of fast efficiency and low cost. Core drilling bits are made of carbide at the cutting edge, with three-layer end tooth geometry, light and fast cutting, the long service life of steel plate drill bits, double-cutting flat shank interface, and are suitable for all kinds of drilling machines. Carbide drill bits are also suitable for all kinds of vertical drilling machines, rocker drilling machines, milling machines, lathes, etc.

Classification of core drilling bits

There are several different types of coring bits, and the best one depends largely on the size and depth of the hole you are drilling and the type of material you are drilling through.

Core bits are available in alloy bits and tool steel bits by material.

Alloy bits are mainly used for hard materials, while tool steel bits are generally used for softer materials, and for both types of bits tool, steel is relatively cheaper.

Tungsten carbide core drill bits

As far as coring drills are concerned, carbide coring drills are usually the cheapest option.

The drill itself has carbide "teeth" that surround the circumference of the drill bit. Once rotated, these teeth bite into the surface you are working on and cut their way through to create the desired hole.

Although not recommended, many people use the hammering action of these bits to increase their cutting speed and capability. This will eventually wear out coring bits faster, but since they are usually cheap, they are not usually seen as a major problem.

In addition to wearing out the bit faster, the hammering action also creates a lot of vibration while drilling, which usually results in the hole ending up larger than expected.

Because they are not particularly high quality, carbide hollow core drills are usually only useful for drilling through softer concrete blocks.

In most cases, attempting to drill more dense objects (such as solid concrete) will cause the drill bit to heat up and wear out much faster.

Diamond coring bits

Diamond hollow core bits are a definite upgrade from the carbide hollow core bits described above.

Unlike carbide bits, the teeth on diamond coring bits have diamonds embedded in the teeth. Because diamonds are so hard, they will grind their way through the sharp, clean-cutting surface you are trying to create.

There are actually two different types of diamond hollow bits - wet cut and dry cut. Essentially, wet-cut diamond coring bits are cooled with water while drilling, while dry diamond coring bits are simply used dry.

Since a lot of heat is generated during drilling, it is necessary to keep the diamond coring drill bit as cool as possible to prevent unnecessary damage to the cutting teeth to a minimum. If the surface of the cutting teeth is subjected to too much heat, the metal encasing them will melt and cover the diamond and reduce cutting efficiency. If this happens, the bit will need to be "repaired" to expose the diamond again.

In summary, it is common to use dry-cutting diamond bits for indoor work, and wet-cutting bits for outdoor work.

When using dry-cutting bits, they must be kept as cool as possible. To do this, they should be used for short periods of time, and the entire bit should be periodically removed from the hole and exposed to the air to dissipate the heat. Nevertheless, dry-cutting diamond coring bits do not have to be used dry, you can also use them wet.

High quality best price core bits supplier

BESTWIN Tools Co.,Ltd. is a professional hand tool and accessory supplier of high-quality, effective, and reliable drills, hole saws, pneumatic tools, and other tool components worldwide. BESTWIN offers the hardest and most durable drill bits. Suitable for any working conditions and needs. You are welcome to contact BESTWIN anytime to get the latest price of core bits tools.

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