Depends on the size, but in general at least 2-3 times the cost of a comparable regular drill. I have a 1 inch diamond holesaw bit that cost $26 -A regular steel one is about 8-9.
The best type of drill bit for granite is a diamond-tipped drill bit. Diamond is one of the hardest materials and can effectively drill through the tough surface of granite.
Very slowly with a Carbide drill bit or Diamond core bit, both will work, but the diamond core bit works much better, make sure the bit has a constant flow of coolant or be submerged in the coolant. (go very slowly, do not apply much pressure, let the bit do the cutting) The best way is to use a drill press but a hand drill will work.
You need a diamond tipped drill bit to drill glass or tile.
An ordinary HSS drill bit can not cut through glass. A diamond tipped drill bit is necessary for this.
Diamond Core Drill Bits are the best for concrete.
A 40mm hole saw is more efficient than a drill bit for holes of this size.
Diamond by nature is the hardest material, therefore Diamond bits are the "hardest." They are only for ceramics though, for drilling in metal, you would use a cobalt, or carbide drill bit.
With a Diamond drill bit and water. Keep enough water around the bit to keep it relatively cool. If drilling through a counter make a dam around the area where the hole will be with plumbers putty. Fill with water and slowly drill.
You need a diamond tipped bit to drill almost any rock.
For drilling into a granite countertop, it is recommended to use a diamond-tipped drill bit. Diamond-tipped drill bits are specifically designed to cut through hard materials like granite effectively.
You will need a diamond drill bit that is specially designed for glass. They are not terribly expensive. A 1/4 inch Hitachi bit is $14.99. There are much cheaper generic bits on Amazon. Use moderate pressure. A drill press is best. Use water for lubrication. Use moderate speeds. Raise the bit once or more per minute. Reduce pressure as the bit approaches drill-through. Tempered glass is almost always going to break even with careful drilling.
yes but you need a special diamond tip bladeANS 2 - I have a Dremel drill press, it can be used with any type of small bit. The diamond tip bit may only be for certain materials.