Glass Grinders: What to Look For

What a glass grinder does

A glass grinder is a small benchtop machine with a motor-driven diamond bit and a water reservoir. A sponge or pump keeps the bit wet. You hold the glass against the bit to smooth sharp edges, shape pieces to fit a pattern and clean up cuts. They are standard equipment for stained glass and are also handy in a lapidary workshop.

Bits

Bits come in different diameters and grits. A smaller bit lets you grind tight curves; a larger bit is better for long edges and general work. A grinder that accepts more than one size of bit is more flexible. Diamond bits wear out, so check that replacements are available for the model you are considering.

Features

• Water system: a steady supply on the bit stops dust and heat.
• Work surface: a larger, adjustable table or a removable head makes it easier to hold glass at the angle you need.
• Splash control: a shield keeps water and glass slurry off you and the bench.
• Noise and vibration: a quiet, smooth motor is more comfortable over long sessions.

Safety

Wear safety glasses every time and keep the bit wet. Glass slurry is abrasive and should be cleaned up rather than left to dry into dust. Keep the machine on a stable bench and keep cords away from water.