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Alpha Wet Diamond Core Bits (3/8" - 2-1/2")
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At a Glance
Quick Decision Guide
Diameter
3/8"
Maximum RPM
3,500 RPM
Drilling Type
Wet
Thread
5/8"-11
Primary Materials
Granite & Engineered Stone
Common Application
Faucet & Utility Holes
Segment Type
Direct-Sintered Metal
Tool Compatibility
Water-Fed Polishers & Drills
Why Choose This Product
Key Benefits
Fast Cutting
Aggressive core bit cuts quickly through granite and engineered stone
Clean Drilling
Produces clean holes for countertops, vanities and utility penetrations
Sink Cutout Versatility
Creates rounded corners for square and rectangular sink openings
Broad Material Use
Drills natural stone, engineered stone, concrete and ceramic tile
Common Tool Fit
5/8"-11 thread fits many drills and water-fed polishing tools
Wet Drilling
Compatible with central water-feed tools and water swivel setups
Product Information
Product Details
Specifications
Brand
Alpha®
Part Number
DCB00380
UPC
749173460326
Product Type
Wet Core Drill Bit
Diameter
3/8"
Maximum RPM
3,500 RPM
Drilling Type
Wet
Thread
5/8"-11
Segment Construction
Direct-Sintered Metal Segments Brazed to Steel Core
Primary Materials
Granite & Engineered Stone
Additional Materials
Natural Stone, Concrete & Ceramic Tile
Applications
Faucet Holes, Sink Cutout Corners & Utility Penetrations
Utility Applications
Water, Gas & Electrical Piping
Tool Compatibility
Water-Fed Polishers & Compatible Drills
Drill Press Use
Yes, with Water Swivel Attachment
Free-Hand Use
Yes, with Compatible Wet Polishing Tool
Water Requirement
Central Water Feed or Water Swivel Required
Compatible Alpha Tools
AIR-680, AWP-158 & VSP-320
About This Product
Wet Core Bits for Granite and Engineered Stone
Alpha® Wet Core Drill Bits are aggressive core bits for drilling clean holes in granite, engineered stone, concrete, and ceramic tile. Direct-sintered metal segments are brazed to the steel core for fast cutting and long service life in wet drilling applications.
Faucet Holes, Sink Cutouts and Utility Penetrations
These core bits are suited for drilling faucet-mounting holes in countertops and vanities and creating clean rounded corners for square or rectangular sink cutouts. They can also drill penetrations for water, gas, and electrical piping where natural stone, concrete, or ceramic tile is already installed.
5/8"-11 Thread for Water-Fed Tools
The 5/8"-11 thread fits many common drills and water-fed polishing tools. The bits can be used with a drill press equipped with a water swivel or free-hand with compatible wet polishing tools such as the Alpha AIR-680, AWP-158, or VSP-320.
Wet Drilling Requirements and Free-Hand Use
Alpha Wet Core Drill Bits must be used wet with a central water-feed tool or water swivel. For free-hand drilling, Alpha recommends using a template to guide the bit and clamping a scrap piece of stone beneath the workpiece to reduce excessive chipping on the backside.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What materials can Alpha Wet Core Drill Bits drill?
They are designed for fast drilling in granite and engineered stone and can also be used on natural stone, concrete, and ceramic tile.
Do Alpha Wet Core Drill Bits require water?
Yes. These core bits must be used wet with a central water-feed tool or a water swivel attachment.
What are these wet core bits commonly used for?
Common applications include drilling faucet-mounting holes in countertops and vanities, creating rounded corners for sink cutouts, and making penetrations for water, gas, and electrical piping.
What thread size do Alpha Wet Core Drill Bits use?
All listed sizes use a 5/8"-11 thread, which is compatible with many common drilling and water-fed polishing tools.
Can these core bits be used free-hand?
Yes. They can be used free-hand with a compatible wet polishing tool. Alpha recommends using a template to guide the bit during free-hand drilling.
Can Alpha Wet Core Drill Bits be used with a drill press?
Yes. They can be used on a drill press equipped with a water swivel attachment to provide the required water supply.
How can backside chipping be reduced when drilling stone?
Alpha recommends clamping a scrap piece of stone beneath the workpiece to reduce excessive chipping as the core bit exits the backside.