Stone Wet Core Drill Bit (M14)
Wet core drill bit with electroplated or sintered crown for drilling clean round holes in granite, marble, porcelain and hard tile. Black anti-scratch barrel, M14 connection for angle grinders and drill presses.
| Diameter | 20 / 25 / 30 / 35 / 40 / 50 / 68 / 100 mm |
|---|---|
| Length | 80 / 100 / 150 mm |
| Connection | M14 / 5/8"-11 / 1/2" GAS |
| Crown | Sintered / electroplated |
| Application | Granite, marble, porcelain, hard tile |
| Cooling | Wet (constant water feed) |
| Packaging | Poly bag / tube, color box |
| MOQ | 50 pcs per size |
About the Stone Wet Core Drill Bit (M14)
Stone cores are short and precise rather than long and deep: a sintered or electroplated crown on a rigid barrel cuts a true circle in granite and porcelain without the wander a masonry bit produces. The M14 mount puts it straight onto the grinder most fabricators already have.
Typical applications
- Granite and marble fabrication — Tap holes, soap dispenser holes and fixing holes in worktops.
- Porcelain and hard tile — Clean holes for shower valves, wastes and pipe collars.
- Sanitary and electrical installs — Holes through finished stone and tile with minimal breakout.
How to choose the right specification
- Crown type — Sintered for granite and repeated use, electroplated for porcelain and glass where a fine edge matters most.
- Diameter — 20–35 mm for taps and fixings, 50–68 mm for wastes, 100 mm for large services.
- Barrel length — 80 mm for tile and thin stone, 100–150 mm for worktops and thick sections.
Supply, packing and OEM
Poly bag or tube, 50 pcs per size per size. Crowns are checked for concentricity, and the barrel is coated to resist scratching finished surfaces. OEM barrel marking and box printing available.
Standard packing is poly bag / tube, color box, minimum order 50 pcs per size per size, with mixed sizes accepted on a first order. Bulk orders typically ship within 25–40 days after deposit, FOB Shanghai or Ningbo — about 2.5 hours from our workshop in Danyang.
Most of this item ships to Canada, Europe, Australia, Japan, the Middle East and South America. Tell us the destination market and we match the sizes, thread standard, marking and packing language it uses — metric for Europe, Japan and South America, imperial where the trade still buys in inches, and carton copy in the language your customers read — then quote FOB, CIF or DDP against your order size.
Related products: wet core drill bit, dry core bit.
Further reading: how to choose a diamond core bit — size, crown and thread
More from Diamond Drill Bits
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