Alpha Groove Cutter for Granite 5/8"-11
Pickup currently unavailable at Dynamic Stone Tools Warehouse (Manassas Park, VA)
Description
Description
Alpha® Groove Cutter for Granite (5/8"-11)
The Alpha® Groove Cutter produces flawless, level grooves for butt-joint seaming in granite and engineered stone. Its patent-pending design ensures each groove is perfectly level, delivering maximum joint strength. Two sizes cover 3/4" (2 cm) and 1-1/4" (3 cm) slabs. For WET application only on a 5" high-speed angle grinder with the Universal Safety Guard Kit (GCWKIT) and a GFCI.
Features
- Patent-pending design produces perfectly level grooves for maximum joint strength
- Sized for 3/4" (2 cm) and 1-1/4" (3 cm) slabs
- 5/8"-11 threaded arbor — mounts directly on a 5" high-speed angle grinder
- Recommended for granite and engineered stone
- Wet cutting only — eliminates dust and extends blade life
- Designed for use with the Alpha® GCWKIT Universal Safety Guard Kit
- Max safe operating speed 14,500 RPM
- Made in Japan
| Part No. | Kerf | Recommended For | Max RPM | Thread | UPC |
|---|---|---|---|---|---|
| GCW258 | 4.2 mm | 3/4" (2 cm) Slab | 14,500 | 5/8"-11 | 749173470516 |
| GCW358 | 7.5 mm | 1-1/4" (3 cm) Slab | 14,500 | 5/8"-11 | 749173470523 |
- Mount the groove cutter on a 5" high-speed angle grinder fitted with the Alpha® GCWKIT Universal Safety Guard Kit and an external water-feed line.
- Plug the grinder into a GFCI — required for any wet application.
- Open the water valve and confirm steady flow at the blade before contact.
- Set the cutter against the slab edge so the segment height matches the slab thickness (3/4" / GCW258 or 1-1/4" / GCW358).
- Run the grinder at or below the rated 14,500 RPM maximum.
- Move the cutter steadily along the joint line; do not force it sideways — let the diamond segments do the work.
- After the cut, flush the blade with clean water and let it air-dry to extend life.
Groove Cutter for 3/4" (2 cm) Slab Granite (5/8"-11) — GCW258
| Part No. | GCW258 |
| UPC | 749173470516 |
| Type | Groove Cutter for 3/4" (2 cm) Slab Granite (5/8"-11) |
| Packaged Weight | 1.30 lbs |
| Package Dimensions | 4.25" x 4.25" x 5" |
| Commodity Code | 6804.21.0000 |
| Country of Origin | Japan |
Groove Cutter for 1-1/4" (3 cm) Slab Granite (5/8"-11) — GCW358
| Part No. | GCW358 |
| UPC | 749173470523 |
| Type | Groove Cutter for 1-1/4" (3 cm) Slab Granite (5/8"-11) |
| Packaged Weight | 1.50 lbs |
| Package Dimensions | 4.25" x 4.25" x 5" |
| Commodity Code | 6804.21.0000 |
| Country of Origin | Japan |
| Property | Detail |
|---|---|
| Thread / Arbor | 5/8"-11 |
| Max RPM | 14,500 |
| Material | Granite, engineered stone |
| Application | Wet only |
| Host Tool | 5" high-speed angle grinder |
| Required Accessory | GCWKIT Universal Safety Guard Kit + GFCI |
| Country of Origin | Japan |
What materials is the Groove Cutter recommended for?
Granite and engineered stone. Marble groove cutters are available separately.
Can I use the Groove Cutter dry?
No. The Alpha® Groove Cutter is for WET application only.
What host tool do I need?
A 5" high-speed angle grinder fitted with the Alpha® GCWKIT Universal Safety Guard Kit, an external water supply, and a GFCI. It is NOT compatible with polishers.
What is the maximum safe operating speed?
14,500 RPM.
How do I choose between GCW258 and GCW358?
Use GCW258 (4.2 mm kerf) for 3/4" (2 cm) slabs and GCW358 (7.5 mm kerf) for 1-1/4" (3 cm) slabs.
How long will the Groove Cutter last?
Blade life varies with granite hardness classification and operator technique.
Is a replacement nylon guide available?
Yes. The PFBNG01 / PFBNG02B nylon guide is available through authorized Alpha® distributors.
Groove Cutter on Angle Grinder — Biscuit Cutting
Groove Cutter on Angle Grinder — Seaming
⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.
