Wet Core Drill Bit Ultimate Wet Core Drilling Bit
Pickup available at Dynamic Stone Tools Warehouse (Manassas Park, VA)
Usually ready in 2 hours
Wet Core Drill Bit Ultimate Wet Core Drilling Bit
Description
Description
Alpha® Wet Core Drill Bit
The Alpha® Wet Core Drill Bit is built for fast, clean drilling of faucet-mounting holes in granite and engineered-stone countertops and vanities, and for rounding the internal corners of square or rectangular sinkholes. Direct-sintered diamond segments are vacuum-brazed to a steel core, with diamonds on the side of the core to prevent undercut during manual drilling. Each bit is 4" in usable length, threaded 5/8"-11 to fit drill presses with a water swivel or wet polishers such as the Alpha® VSP-320, AIR-680 and AWP-158. Available in nine US sizes from 3/8" through 2-1/2". Wet use only — do not exceed 3,500 RPM.
Features
- Designed for faucet-mounting holes in countertops and vanities
- Very fast cutting on granite and engineered stone
- Diamonds on the side of the core prevent undercut during manual drilling
- Direct-sintered diamond segments vacuum-brazed to a steel core for durability
- Cleans up internal corners on square and rectangular sinkholes
- 5/8"-11 thread fits most popular water-fed polishers and drill-press swivels
- Versatile for water, gas and electrical piping work in construction trades
- Wet operation only — maximum 3,500 RPM
| Part No. | Size | Type | Thread | UPC |
|---|---|---|---|---|
| DCB00380 | 3/8" | Wet | 5/8"-11 | 749173460326 |
| DCB00500 | 1/2" | Wet | 5/8"-11 | 749173460333 |
| DCB00750 | 3/4" | Wet | 5/8"-11 | 749173460340 |
| DCB01000 | 1" | Wet | 5/8"-11 | 749173460357 |
| DCB01250 | 1-1/4" | Wet | 5/8"-11 | 749173460364 |
| DCB01375 | 1-3/8" | Wet | 5/8"-11 | 749173460371 |
| DCB01500 | 1-1/2" | Wet | 5/8"-11 | 749173460388 |
| DCB02000 | 2" | Wet | 5/8"-11 | 749173460395 |
| DCB02500 | 2-1/2" | Wet | 5/8"-11 | 749173460401 |
- Mount the bit on a wet polisher (VSP-320, AIR-680, AWP-158) or a drill press equipped with a water swivel. Hand-tighten on the 5/8"-11 spindle.
- Build a drill template from a 3/8" granite tile, scrap engineered-stone, or composite material. Clamp the template to the workpiece with the polished side facing the workpiece for accurate centering.
- Place a scrap stone underneath the work area to support the backside of the slab and prevent blow-out chipping when the bit breaks through.
- Start water flow before the bit touches stone — water must run continuously to cool the diamond segments and flush slurry.
- Begin drilling at a low RPM with light pressure; do not exceed 3,500 RPM at any point.
- Apply steady, even pressure. Let the diamond segments cut — forcing the bit will glaze the diamonds and cause heat damage.
- For sinkhole corner rounding, plunge the bit at each corner mark, then connect the holes with a saw cut.
- After use, flush the bit with clean water and store dry. Inspect segments for wear before re-use.
Maximum drillable thickness equals the 4" usable bit length on a new bit. Never run dry — segments will glaze and cutting will stop.
3/8" — DCB00380
| Part No. | DCB00380 |
| UPC | 749173460326 |
| Diameter | 3/8" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | Not published by manufacturer |
| Package Dimensions | Not published by manufacturer |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
1/2" — DCB00500
| Part No. | DCB00500 |
| UPC | 749173460333 |
| Diameter | 1/2" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | Not published by manufacturer |
| Package Dimensions | Not published by manufacturer |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
3/4" — DCB00750
| Part No. | DCB00750 |
| UPC | 749173460340 |
| Diameter | 3/4" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 0.50 lb |
| Package Dimensions | 6.25" x 1.5" x 1.5" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
1" — DCB01000
| Part No. | DCB01000 |
| UPC | 749173460357 |
| Diameter | 1" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 0.50 lb |
| Package Dimensions | 6.25" x 1.5" x 1.5" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
1-1/4" — DCB01250
| Part No. | DCB01250 |
| UPC | 749173460364 |
| Diameter | 1-1/4" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 0.60 lb |
| Package Dimensions | 6.25" x 1.5" x 1.5" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
1-3/8" — DCB01375
| Part No. | DCB01375 |
| UPC | 749173460371 |
| Diameter | 1-3/8" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 0.60 lb |
| Package Dimensions | 6.25" x 1.75" x 1.75" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
1-1/2" — DCB01500
| Part No. | DCB01500 |
| UPC | 749173460388 |
| Diameter | 1-1/2" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 0.70 lb |
| Package Dimensions | 6.25" x 1.75" x 1.75" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
2" — DCB02000
| Part No. | DCB02000 |
| UPC | 749173460395 |
| Diameter | 2" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 1.00 lb |
| Package Dimensions | 6.5" x 2.25" x 2.25" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
2-1/2" — DCB02500
| Part No. | DCB02500 |
| UPC | 749173460401 |
| Diameter | 2-1/2" |
| Type | Wet (water-fed only) |
| Thread | 5/8"-11 |
| Max RPM | 3,500 |
| For Use On | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Packaged Weight | 1.30 lb |
| Package Dimensions | 6.75" x 2.75" x 2.75" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
| Data Sheet | Tech Note (PDF) |
| Property | Detail |
|---|---|
| Brand | Alpha Professional Tools® |
| Operation | Wet only (water-fed) |
| Maximum RPM | 3,500 |
| Thread / Arbor | 5/8"-11 |
| Usable Length | 4" maximum drillable depth |
| Segment Construction | Direct-sintered diamond segments vacuum-brazed to steel core |
| Side Protection | Diamonds on side of core to prevent undercut |
| Compatible Materials | Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete, gypsum |
| Recommended Tools | Alpha® VSP-320, AIR-680, AWP-158, or drill press with water swivel |
| Available Sizes | 3/8" · 1/2" · 3/4" · 1" · 1-1/4" · 1-3/8" · 1-1/2" · 2" · 2-1/2" |
| Commodity Code | 8207.19.3060 |
| Country of Origin | Japan |
- VSP-320 — Variable Speed Electric Wet Polisher with central water feed (recommended host tool)
- AIR-680 / AIR-658 — Pneumatic Wet Stone Polishers with water feed
- AWP-158 — Wet Air Polisher
- Laser Core Bits — Wet/Dry Laser-Welded Segmented Core Bits for heavier-duty work
- CNC Core Bits for Porcelain & Sintered Slabs — for Dekton®, Neolith® and crystallized glass
- PSC-150 — Pneumatic Stone Cutter for sinkhole cut-outs
- Eased Edge / Tile Bullnose Kit — on-site finish-edge creation
Q: Why are there diamonds on the side of the core?
When you drill a hole manually, unstable conditions can cause undercut. Side diamonds, applied via vacuum-brazing technology, protect the steel core and improve drilling stability and ease.
Q: How long do Alpha® Wet Core Bits last?
Life expectancy varies with bit size and material. In testing, 1-1/4" and 1-3/8" bits achieved over 350 core drill holes through 1-1/4" (3 cm) granite slabs.
Q: What materials can I core-drill with this bit?
Granite, engineered stone, porcelain slab, marble, limestone, ceramic tile, concrete and gypsum.
Q: Can I run this bit dry?
No. Water is required to keep the diamond segments cool. Without water the segments will glaze and cutting ability will stop.
Q: What RPM should I run?
Do not exceed 3,500 RPM under any circumstances.
Q: Can I use this on an electric or pneumatic polisher?
Yes — it is highly recommended on the Alpha® VSP-320 and AIR-680, which have central water-feed systems.
Q: Can I use this on a high-speed angle grinder with an outside water feed?
No. Alpha® only recommends wet core bits on polishers with central water-feed systems. High-speed angle grinders lack central water feed.
Q: What is the thread size?
5/8"-11.
Q: What kind of template should I use?
Use 3/8" granite tile, a scrap of engineered stone, granite slab or composite material. Templates are built by the operator and should be clamped with the polished side facing the workpiece for accuracy.
Q: Can I use this on a drill press with a water swivel?
Yes — but use caution. The extra length of the swivel attachment can damage the bit under excessive feed pressure.
Q: What is the maximum stone thickness I can drill?
The usable length of a new bit is 4", which is the maximum drillable thickness.
⚠ WARNING: This product can expose you to chemicals including Cobalt, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. Always wear appropriate PPE.
