core drill bit is a common drilling tool, and it is also an indispensable tool in the drilling industry, which makes drilling more efficient.
what is a core drill?
The core drill bit is also called the hollow drill bit, which is mainly used to drill the steel plate and other products. The hollow drill bit cooperates with the machine specially equipped with the core drill bit, which has the characteristics of high efficiency and low cost. Made of alloy, with three-layer end-tooth geometry, light cutting, long service life of steel plate drills, double-cut flat shank interface, suitable for various drilling machines. Carbide drills are also suitable for various types of vertical drilling machines, radial drilling machines, milling machines, lathe etc.

What are the types and uses of coring bits
Types of coring bits: diamond coring bits, PDC coring bits, alloy coring bits
Diamond coring bit: The inlay method of diamond can be selected according to the change of the rock formation. The diamond bit is divided into two types: natural and artificial, and is an essential tool for drilling into hard rock formations.
PDC coring bits: suitable for soft to medium hard formations
Alloy core drill: mainly used for hard materials
How to use a coring bit?
1. Feed speed: Feed speed is generally based on experience, numerically speaking, it is generally 0.08-0.12mm/rev, or 0.6-1.0mm/sec. Feed speed is a key element in drilling. Different The feed rate can form different iron chips, and different iron chips will change the chip removal performance.
2. Positioning: Mark a positioning point in the center of the position where drilling is required or mark a "+" line with an alloy needle to ensure the accuracy of the drilling position. Note that when using the center chisel to hit the positioning point, please ensure that the center chisel is vertical On the surface of the machined workpiece, so as not to affect the smooth discharge of the cutting core.
3. Start drilling: please adjust the appropriate speed, make sure the bottom of the magnetic base of the drilling rig is clean before starting the machine, first turn on the magnetic base switch and then turn on the motor switch, the motor is running and the coolant switch is turned on at the same time, when the drill bit touches the steel plate, feed slowly first , After drilling about 1-2mm, feed at normal speed.
4. End of drilling: Turn off the motor and wait for the spindle to stop rotating, use an iron hook to remove the iron filings wrapped around the drill body, and then continue the operation.