Alpha Wet Core Bits
Alpha Wet Core Bits are engineered for precision drilling in countertops, vanities, and more. Perfect for faucet-mounting holes or creating clean rounded corners in square and rectangular sink cutouts, these versatile core bits are also ideal for construction trades where holes are required for water, gas, or electrical piping through natural stone, concrete, or ceramic tile.
Designed for wet use, Alpha® Wet Core Bits work seamlessly with drill presses equipped with water swivel attachments or free-hand with wet polishing tools such as the AIR-680, AWP-158, or VSP-320. Available in a wide range of sizes from 3/8” to 2-1/2”, they feature a 5/8”-11 arbor compatible with most drills and polishers. The direct sintered metal segments brazed to the steel core ensure long life, aggressive cutting, and clean results. For free-hand drilling, we recommend using a template and a scrap backing piece to minimize chipping.
Reliable, durable, and adaptable — Alpha Wet Core Bits are the professional’s choice for high-quality drilling performance.
Wet Core Bits Main Features
- Designed for Drilling The Faucet-Mounting Holes in Countertops and Vanities
- Very Fast Cutting On Granite and Engineered Stone
- High-Quality Aggressive Core Bit
- Make Clean Rounded Corners for Square or Rectangular Sinkholes
- Versatile and Adaptable in Many Industries for Water, Gas and Electrical Piping
- Fits On Most Popular Water-Fed Polishers
- Must Be Used Wet
Alpha Wet Core Bits Videos
VSP-120 w/Wet Core Bit for Sink Hole Corner
How to Cut Internal Corners
AIR-658 w/Wet Core Bit for Faucet Holes
Alpha Wet Core Bits Specifications
| Part No. | Diameter | Maximum RPM | Type | Threads |
|---|---|---|---|---|
| DCB00380 | 3/8″ | 3,500 | Wet | 5/8″-11 |
| DCB00750 | 3/4″ | 3,500 | Wet | 5/8″-11 |
| DCB01000 | 1″ | 3,500 | Wet | 5/8″-11 |
| DCB01250 | 1-1/4″ | 3,500 | Wet | 5/8″-11 |
| DCB01375 | 1-3/8″ | 3,500 | Wet | 5/8″-11 |
| DCB01500 | 1-1/2″ | 3,500 | Wet | 5/8″-11 |
| DCB02000 | 2″ | 3,500 | Wet | 5/8″-11 |
| DCB02500 | 2-1/2″ | 3,500 | Wet | 5/8″-11 |
Wet Core Bits Related Documents
| Document Type | Link |
|---|---|
| Safety Data Sheet | Diamond Tools Core Boring Bit |
| Reference | Wet-Core-Bits_HelpfulHints |
| Reference | Wet-Core-Bits_HowToUse |
| Flyer | Wet Core Bits flyer |
Additional Information
| PartNo | UPC Code | Pkg. Weight (lbs) | Package Dimensions | Commodity Code | Country Of Origin |
|---|---|---|---|---|---|
| DCB00380 | 749173460326 | 0.40 | 6.25in x 1.5in x 1.5in | 8207.19.3060 | Japan |
| DCB00750 | 749173460340 | 0.50 | 6.25in x 1.5in x 1.5in | 8207.19.3060 | Japan |
| DCB01000 | 749173460357 | 0.50 | 6.25in x 1.5in x 1.5in | 8207.19.3060 | Japan |
| DCB01250 | 749173460364 | 0.60 | 6.25in x 1.5in x 1.5in | 8207.19.3060 | Japan |
| DCB01375 | 749173460371 | 0.60 | 6.25in x 1.75in x 1.75in | 8207.19.3060 | Japan |
| DCB01500 | 749173460388 | 0.70 | 6.25in x 1.75in x 1.75in | 8207.19.3060 | Japan |
| DCB02000 | 749173460395 | 1.00 | 6.5in x 2.25in x 2.25in | 8207.19.3060 | Japan |
| DCB02500 | 749173460401 | 1.30 | 6.75in x 2.75in x 2.75in | 8207.19.3060 | Japan |
Frequently Asked Questions
What is the purpose of the diamonds on the side of the core?
When you drill a hole manually, you are exposed to the risk of undercut due to the unstable drilling condition as compared to using a drill press. To avoid such wear on the steel core, we attached diamond grits on the side of core bit using Vacuum Brazing Technology. The combination of sintered segment and undercut protection will make your drilling application easier and more stable.
What is the life expectancy of the Alpha® Wet Core Bits?
Each size of the wet core bits will have its own individual life expectancy due to the size of the diamond segments and material they are core drilling. The 1-3/8” and 1-1/4” core drill bits were tested by the Research & Development Division of Alpha® and they recorded over 350 core drill holes through various types of 1-1/4” (3cm) granite slabs.
What sizes of Wet Core Bits are available from Alpha®?
See specifications chart.
What materials can be core drilled using the Alpha® Wet Core Bits?
The Alpha® Wet Core Bits are designed to be used on granite, engineered stone, porcelain slab, marble, limestone, ceramic tiles, concrete and gypsum.
Can I use the Alpha® Wet Core Bit dry?
No. Alpha® Wet Core Bits are designed for wet use only! Water is required to keep the diamond segments cool during the drilling process; if no water is used, the segments will glaze and the cutting ability of the core bit will stop. If your application calls for dry core drilling, please use the Alpha® Dry Core Bit series designed for dry applications on high-speed grinders.
What rpm range should the Alpha® Wet Core Bits be used?
These wet core bits should not exceed 3,500rpm.
Can I use the Alpha® Wet Core bits on electric and pneumatic polishers?
Yes. We highly recommend using the Alpha® Wet Core Bits on our electric and pneumatic polishers such as: VSP-320 and AIR-680.
Can I use the Alpha® Wet Core Bits on my high-speed variable grinder with outside water feed?
No. Alpha® recommends using our wet core drill bits on polishers with central water-feed systems to assure proper lubrication of the core bits. High-speed angle grinders with variable speed do not have a central water-feed supply, so the core bit will not receive proper coolant to the diamond segments.
What is the thread size of the Alpha® Wet Core Bits?
The thread size is 5/8”-11.
What kind of template should be used?
The template can be any type of material such as granite 3/8” tile, scrap of engineered stone or granite slab (narrow stock such as 2cm) or composite material. The template should be made by the same operator to assure accuracy. Secure the template to the stone by clamping it with the polished side facing the polished work piece to avoid possible scratching. Your template should act as a guide for the bit.
Can I use Alpha® Core Drill Bits on a drill press with a water swivel attachment?
Alpha® Core Drill Bits can be used on water swivel attachments, but caution should be taken to allow the diamonds to work properly. Because of the extra length added to the bit by the water swivel attachment, excessive pressure can damage the bit.
What applications are the Alpha® Wet Core Bits designed for?
Our core bits are designed for drilling faucet-mounting holes in counter tops and vanities. They can also be used to clean rounded corners for square or rectangular sinkholes. They are ideal for construction trades wherever holes are needed for water, gas and electrical piping.
What stone thickness can I drill through using an Alpha® Wet Core Bit?
Alpha® Wet Core Bits are 4” in length; this would be the maximum thickness they can drill through when they are new.
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