Diamond Hole Saws for Tile and Granite Cutting
By Drill Hog® | Published: 2026-10-21
Category: Buying Guides
Learn how to choose the right diamond hole saw for tile, granite, marble, and glass. Compare diamond vs carbide bits and get practical cutting tips.
Quick answer
For cutting tile, granite, marble, or glass, a diamond hole saw is your best bet. The Drill Hog Diamond Hole Saw Kit covers common sizes and works wet or dry, but you need to match the bit to your material and drilling method for clean results.
Diamond vs carbide hole saws: the key trade-off
Carbide-tipped hole saws excel in metal and some hard plastics, but they struggle with brittle, abrasive materials like porcelain tile, granite, and glass. Diamond-coated bits handle those materials because the diamond grit grinds rather than cuts, reducing chipping and cracking.
The downside: diamond hole saws wear faster on steel or wood and cost more upfront. For occasional tile or stone work, the extra cost pays off in cleaner holes and less frustration.
Wet vs dry cutting matters
Diamond hole saws can be used wet or dry, but water cooling dramatically extends bit life and reduces dust. For glass and polished marble, always use water to prevent heat cracks. For ceramic tile and granite, a steady water drip is ideal, but brief dry cuts are possible if you pause to let the bit cool.
The Drill Hog diamond bits are rated for wet or dry use. If you cannot use water, keep a spray bottle handy and cut in short bursts.
Decision rules for choosing a diamond hole saw
- Material match: Use a diamond hole saw for porcelain, ceramic tile, granite, marble, slate, glass, and fiberglass. Avoid using it on metal, wood, or plastic — those dull the diamond grit quickly.
- Size selection: Pick a bit slightly larger than the fixture or pipe you need to pass through. For standard faucet holes (1-3/8") or 1/2" conduit (3/4"), the included sizes in a kit like Drill Hog's cover the most common jobs. Measure your fixture before buying — a kit with multiple sizes saves trips to the store.
- Cutting technique: Start at a 45° angle to create a shallow groove, then tilt upright. Use light, steady pressure — let the diamond grit do the work. For glass, tape the surface first to prevent slipping. Pushing too hard overheats the bit and causes chipping. Patience gives cleaner holes.
- Cooling method: Use water whenever possible. For glass and marble, water is mandatory. For tile and granite, a wet sponge or spray bottle works. Dry cutting is possible but reduces bit life — pause every 10-15 seconds to let the bit cool.
- Lifespan expectations: A diamond hole saw typically lasts for 30-80 holes in ceramic tile, 10-30 in granite, and 5-15 in glass, depending on cooling and pressure. When the cutting slows noticeably, replace the bit. If you have a large project, buy a spare bit — running a dull bit damages the material.
Product facts
- Drill Hog Diamond Hole Saw Core Bit HoleSaw Cutter Large Marble Granite Glass: This kit includes five diamond-tipped hole saws in 3/4", 1", 1-3/16", 1-3/8", and 1-5/8" sizes, made from hi-molybdenum steel with diamond coated tips (39.75% diamond). The high diamond concentration and molybdenum steel body give you a durable bit that cuts hard, brittle materials cleanly, and the five-size kit covers common plumbing and electrical pass-through needs.
Drill Hog Diamond Hole Saw Core Bit HoleSaw Cutter Large Marble Granite Glass
Who should buy a diamond hole saw kit
Best for
- DIYers and pros drilling multiple holes in porcelain or ceramic tile for plumbing or electrical work
- Anyone cutting granite, marble, or glass countertops or backsplashes and wanting chip-free results
- Homeowners who need a range of common sizes for occasional tile or stone projects
Not ideal for
- Cutting metal, wood, or plastic — a carbide or bi-metal hole saw is more economical and lasts longer
- Single-use projects where a cheap disposable bit might suffice (but expect more chipping)
- Heavy daily production use — consider industrial electroplated diamond bits with thicker walls
