Diamond hole saw with no pilot bits
Diamond hole saw are used for brittle materials such as glass, ceramic, porcelain, granite, etc.
Pilot bits are usually not good for brittle material applications. They tend to make a crack before the hole saw starts working. The crack propagates and ruins the project.
Instead of a pilot bit, our DRILAX sets comes with a tough poly insert with can be used as a guide to hold the diamond hole saw steady.
You only need the insert for the few turns. You can continue free hand once the diamond hole saw makes the initial mark.
Or if you like, you can buy one of our DRILAX diamond hole saw guides.
These are adjustable.
I ordered Drilax Heavy Duty Diamond Hole Saw. There is no diamond coating on the tips, is this the right item that I received?
Yes, it is the right item.
There are two types of diamond hole saws:
- Electroplated: The diamond abrasive is coated over the hole saw. The diamond coating is visible but they will wear off easily with heat. That’s why these have to be used wet with constant cooling.
- Sintered Diamond: Here the diamond is actually within the material of the hole saw and it does not wear off. This is the professional type of tool that can be used over and over.
You purchased the sintered type, that is why the diamond coating is not visible.