Alpha Dry Core Bits for Granite and Engineered Stone

Alpha Dry Core Bits for Granite and Engineered Stone

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Designed for Jobsite Drilling of Faucet-Mounting Holes in Countertops and Vanities
Very Fast Cutting On Granite/Quartzite and Engineered Stone
Convenient Dry Application
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 High-Speed Grinders

$ 93,39

$ 123,73

Size
- 1"
- 1-1/2"
- 1/2"
- 2"
- 3/4"

Terms and Conditions
Shipping: 2-3 Business Days

Documentos

Alpha Diamond Tools (Core Bit) SDS.pdf Alpha Dry Core Bits Flyer.pdf Alpha Dry Core Bits Helpful Tips.pdf Alpha Dry Core Bits How to Use.pdf

Alpha® Dry Core Bits for Granite, Engineered Stone & Porcelain

Alpha® Dry Core Bits are designed for job-site drilling of faucet, soap-dispenser and air-gap holes in granite, engineered stone, porcelain and crystallized-glass countertops — without water. They thread directly onto a high-speed angle grinder with a 5/8"-11 spindle and use Vacuum Brazed diamond on the side of the barrel with undercut protection, giving aggressive cutting action and stable, clean-walled holes. The 4"-long barrel sets the maximum stone thickness a new bit can drill through.

Features

Designed for jobsite drilling of faucet-mounting holes in countertops and vanities
Very fast cutting on granite, quartzite and engineered stone
Convenient dry application — no water, no slurry, minimal cleanup
High-quality, aggressive Vacuum Brazed diamond construction
Makes clean, rounded corners for square or rectangular sinkholes
Versatile for water, gas and electrical piping pass-throughs
Fits most popular high-speed grinders with a 5/8"-11 spindle
Undercut protection on the side keeps drilling stable and easier

Models / Part Numbers

Part No.	Diameter	Thread	Max RPM	UPC
DRB00500	1/2"	5/8"-11	12,000 RPM	749173461330
DRB00750	3/4"	5/8"-11	12,000 RPM	749173461347
DRB01000	1"	5/8"-11	12,000 RPM	749173460715
DRB01250 &dagger;	1-1/4"	5/8"-11	12,000 RPM	749173460722
DRB01375	1-3/8"	5/8"-11	12,000 RPM	749173460739
DRB01500	1-1/2"	5/8"-11	12,000 RPM	749173460746
DRB02000	2"	5/8"-11	12,000 RPM	749173461354

How to Use

Select the Dry Core Bit diameter that matches your hole spec (1/2" through 2").
Thread the bit fully onto a 5/8"-11 high-speed angle grinder spindle.
Clamp a granite, engineered-stone or composite template on top of the workpiece, polished side toward the workpiece, to guide the bit.
Start at a tilt to bite a crescent, then bring the bit upright once the kerf is established.
Run between 6,000 and 12,000 RPM — never exceed 12,000 RPM and never run below 6,000 RPM.
Use light, steady pressure; let the diamond do the cutting. Pause periodically to clear dust and cool the bit.
Dry use is intended, but wet cutting is recommended whenever water is available — it extends bit life and reduces dust.
Maximum drillable thickness equals the 4" barrel length when the bit is new.

Specifications by Variant

1-1/4" — Dry Core Bit — DRB01250

Part No.	DRB01250
UPC	749173460722
Size	1-1/4"
Type	Dry Core Bit
Thread	5/8"-11
Max RPM	12,000 RPM
Recommended For	Granite, Engineered Stone, Porcelain, Crystallized Glass
Packaged Weight	0.70 lbs
Package Dimensions	6.25" x 1.75" x 1.75"
Commodity Code	8207.19.3060
Country of Origin	Japan

1-3/8" — Dry Core Bit — DRB01375

Part No.	DRB01375
UPC	749173460739
Size	1-3/8"
Type	Dry Core Bit
Thread	5/8"-11
Max RPM	12,000 RPM
Recommended For	Granite, Engineered Stone, Porcelain, Crystallized Glass
Packaged Weight	0.70 lbs
Package Dimensions	6.25" x 1.75" x 1.75"
Commodity Code	8207.19.3060
Country of Origin	Japan

Common Specifications

Property	Detail
Application	Dry (wet use also permitted)
Drive	5/8"-11 Female Thread
Maximum RPM	12,000 RPM
Minimum RPM	6,000 RPM
Barrel Length	4" (maximum drilling depth when new)
Diamond Technology	Vacuum Brazed with sintered segment and undercut protection
Materials	Granite, Engineered Stone, Porcelain, Crystallized Glass
Not Recommended For	Marble (too soft — dry-drill heat may crack the slab)
Country of Origin	Japan

Related & Companion Products

FAQs

What materials can be core-drilled with Alpha® Dry Core Bits?

They are designed for granite, engineered stone and porcelain slab materials, and also work on crystallized glass.

Can I use the Dry Core Bits on marble?

No. Marble is too soft; the heat generated by dry drilling can crack the material.

Can the Dry Core Bits be used wet?

Yes. They are designed for dry use, but wet cutting is recommended whenever possible to extend bit life and control dust.

What is the maximum RPM for these bits?

Do not exceed 12,000 RPM.

What is the minimum recommended RPM?

Do not run below 6,000 RPM. Slow speeds cause polishing instead of cutting and shorten bit life.

Can I use these on a wet polisher?

No. Wet polishers run at roughly 2,000–4,000 RPM — too slow for Dry Core Bits. Use a high-speed angle grinder.

What kind of template should I use?

A template made from granite, engineered stone or composite. Secure it with clamps, polished side facing the workpiece, to guide the bit and prevent walking.

What stone thickness can these bits drill through?

Up to 4" when the bit is new — the barrel length is the limiting factor.

Why are there diamonds on the side of the core?

The side diamonds combined with the sintered segment and undercut protection make the drilling action easier, more stable and less prone to binding.

What sizes are available?

Six standard sizes ship from the factory: 1/2", 3/4", 1", 1-3/8", 1-1/2" and 2". A 1-1/4" option (DRB01250) is also stocked at DST.

Videos

Angle Grinder with Dry Core Bit

How to Cut Internal Corners

Angle Grinder with Dry Core Bit on Granite

How to Work on Porcelain Paver Tiles

Documentation

⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.

Especificaciones

Size	1", 1-1/2", 1/2", 2", 3/4"