It is important to follow a few rules in order to get successful results and a long life with your diamond core bits:
- For every drilling diameter there is a suitable speed at which you achieve the optimum result. Choose the speed according to the table below. The speed range of drill motors are usually optimised for special drilling diameters. If your drill is not capable of the recommended speed, use a different drill motor.
- Ideally, you should use water with a diamond core bit. This will markedly increase the service life of your core bit. Water serves as a coolant, so that the diamond segments do not overheat and can be used continuously. The flow of water will also flush the dust out of the drill hole. This will remove the dust, which takes up 2.5 times the volume of solid stone, from the drilling process, the core bit will not heat up as much and the operation will not take as long. The quantity of water you should use varies greatly according to the application. You can use less water for vertical drilling than for horizontal drilling, because the water flows directly out of the drill hole. For brief drilling through a rebar you can use slightly less water, since in this instance the water is primarily needed for cooling, and not for removing the drilling mud. The figures below are an approximation.