Glass should be drilled with a cutting lubricant. An oil-based lubricant is best. We recommend Handi Bits Foam Cutting & Drilling Lubricant. Water can be used, but not recommended. Make a small reservoir out of a piece of string or bit of clay to hold lubricant around drilling area. Drill pilot hole if possible, you will get better results for your efforts. Never apply excessive pressure to glass. Be sure you are drilling on a flat surface and do not let the body of the drill (not drill bit) slide into and hit the glass when the bit exits the hole. Glass should be drilled at speeds of 300 - 600 RPM. NO FASTER! Remember friction creates heat - the enemy when drilling glass.

Related Product
Dog Drool Foaming Cutting & Drilling Lubricant

These materials should be drilled using a slow slow to moderate speeds. A hammer action drill should not be used because it will cause chipping or cracking. A piece of tape placed over the drilling area will help to prevent chipping and cracking.

Drill at a speed comparable to a typical masonry bit. Expect longer life and quicker cutting with Bad Dog Bits. Should you need a special size of bit for this application, we manufacture Bad Dog Bits up to 24" long and 1-1/2" in diameter. Contact us at 1-800-252-1330 for more information and pricing. Core bits, cruciform bits, spline shank bits, and chisel bits are also available.

Metals should be drilled at high speeds not less than 2,000 RPM. Because Bad Dog Bits file through materials, rather than drill, you will find they do not drill as quickly as a traditional twist drill bit. However Bad Dog Bits will drill much harder metals (like tempered and high-speed steel) than a twist drill. Whenever possible, use a drill press when drilling metal.

Drill at 2,500 RPM. Using a "pulsing action" on the trigger with a faster drill will work. Use a cutting lubricant. The lubricant will help prevent burning, which causes blueing on the stainless steel.

Go get some Dog Drool Lubricant to protect your stainless steel.

Common holes are easily drilled at moderate speeds. However, you might notice a rougher finish than with conventional wood spades or brad point drill bits, particularly on soft wood. Wood spades and brad point drill bits are also available from us at 1-800-252-1330.

The filling action of the Bad Dog Bits is fantastic for drilling plastics. Any speed is acceptable for drilling plastics, Laminate (Formica , etc.), Fiberglass, Solid Surface materials (Corian , etc). Bad Dog Bits will drill any of these materials quickly and efficiently. Use moderate speeds to drill these materials.

Any combination of materials can be drilled with your Bad Dog Bits. Just remember that the most delicate of the materials will determine your drilling speed.