Glass cutting drill bit how to#
Glass cutting drill bit crack#

Before you dive into a project, take some time practicing drilling holes in glass that is similar to what you will be using. That’s in the right zone for drilling a hole in glass.Īs with any new skill, practice is key. Squeezing the trigger half as much as that brings you down to approximately 375 rpm. The key to creating a smooth, clean hole through the glass is by using a low rpm, moderate and consistent pressure, and always starting with a small pilot hole.įor novice DIYers who are not sure to achieve 400 rpm on a variable speed drill, the speed is easy to approximate: If your drill reaches 1500 rpm when you fully depress the trigger, holding the trigger halfway down brings the rpm to about 750.

Glass cutting drill bit how to#

There are plenty of projects you can start once you learn how to drill a hole in glass. Gently file down any chips or jaggedness with a 600-grit diamond file that fits into the hole. When you drill glass, the entry hole will typically be clean and smooth, but the edges of the exit hole might be sharp. High-speed drilling causes overheating and glass-powder buildup at the drill site it can also ruin the bit.

Glass cutting drill bit crack#

Continue drilling at about 400 rpm, and apply light pressure on the drill, so you won’t crack the glass. Replace the starter bit with a larger one if your project calls for a wider hole.

STEP 4: Size up your drill bit as needed. Begin drilling at a low speed-below 400 rpm-to carve the pilot hole. Hold the drill at a right angle (90 degrees) to the glass surface. Insert your bit into the chuck of a variable-speed drill.ĭon your protective gloves, goggles, and dust mask, and you’re ready to get started. Either a 1/8-inch or 3/32-inch carbide- or diamond-tipped bit is a good choice to create a dimple or pilot hole in your glass. RELATED: Bob Vila’s 14 Best Tips for Drilling STEP 3: Choose your starting drill bit.Ĭhoose a drill bit for cutting glass that’s smaller than the hole you’ll end up drilling. If you’re drilling into a glass bottle and find it easier to work on the object at a slight angle-say, 45 degrees-place the bottle on its side, with the marked drill site facing up, lift by the neck to the angle that feels comfortable, and hold the neck to keep it from moving while you drill with the other hand. Lay panes of glass on a pad or other cushioning material. Secure the glass object you’re working with. The tape will give your bit some traction and keep it from wandering on the otherwise slippery glass surface. In the center of the “X,” use a felt-tip marker to indicate the precise spot where the hole will be. Make an “X” with two pieces of painter’s or masking tape at the drill site.

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