Alpha Professional Tools Q-Cut Blade

Alpha® Q-Cut — Ultimate Wet Blade for Quartzite, Granite & Porcelain Tiles

Alpha® Q-Cut is the first diamond blade developed specifically to cut quartzite and hard granites. Designed for cutting quartzite, granite, marble and engineered stone, it is available in sizes to fit most tub and tile saws and the Alpha® Wet Stone Cutters. Tile installers and tile shops will find that Alpha® Q-Cut cuts the most difficult natural stone tiles quickly and efficiently. The advanced style rim reduces the risk of chipping and breaking while providing accurate, safe cuts — making Q-Cut the cost-effective number one choice for tile contractors and shops.

Features

Formulated to cut hard tiles such as quartzite and granite
Tile installer's choice for stone and porcelain tile
Designed for fast, precision, chip-free cutting
Perfect for 2 cm porcelain paver tile
Wet use only (except QZ4578, QZ0578 & QZ1201, which are Wet/Dry)

Models / Part Numbers

Part No.	Diameter	Arbor	Max RPM	UPC
QZ4578	4-1/2"	7/8", 20mm	13,200	749173461897
QZ0578	5"	7/8"	12,200	749173461903
QZ0658	6"	7/8", 5/8", ◊	10,100	749173461910
QZ0758	7"	5/8"	8,400	749173461958
QZ0858	8"	5/8"	7,400	749173461927
QZ0978	9"	7/8", Quad-W5	6,600	749173462542
QZ1058	10"	5/8"	5,900	749173461934
QZ1001	10"	1", 5/8"	5,900	749173462177
QZ1201	12"	1"	6,200	749173462511

How to Use

Verify the blade diameter and arbor match your saw or grinder.
Mount the blade so the printed arrow follows the direction of rotation; if the print is worn, use the embossed arrow on the back.
For Wet Use sizes (6", 7", 8", 9", 10"), confirm continuous water flow before cutting.
Feed the workpiece steadily — let the diamonds cut rather than forcing the blade.
If cut speed slows, re-dress the blade with a dressing stone or concrete block to expose fresh diamonds.
Never exceed the Max RPM printed on the blade and listed in the Models table.

Specifications by Variant

4-1/2" (Thickness 1.6mm) — Arbor: 7/8", 20mm — Wet/Dry Use — QZ4578

Part No.	QZ4578
UPC	749173461897
Size	4-1/2" (Thickness 1.6mm)
Type	Wet/Dry Use
Attachment	Arbor: 7/8", 20mm
Max RPM	13,200
Recommended For	Stone Cutter / Angle Grinder
Packaged Weight	0.30 lbs
Package Dimensions	5 x 5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

5" (Thickness 1.6mm) — Arbor: 7/8" — Wet/Dry Use — QZ0578

Part No.	QZ0578
UPC	749173461903
Size	5" (Thickness 1.6mm)
Type	Wet/Dry Use
Attachment	Arbor: 7/8"
Max RPM	12,200
Recommended For	Stone Cutter / Angle Grinder
Packaged Weight	0.30 lbs
Package Dimensions	6 x 5.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

6" (Thickness 1.4mm) — Arbor: 7/8", 5/8", ◊ — Wet Use — QZ0658

Part No.	QZ0658
UPC	749173461910
Size	6" (Thickness 1.4mm)
Type	Wet Use
Attachment	Arbor: 7/8", 5/8", ◊
Max RPM	10,100
Recommended For	Stone Cutter / Tile Saw
Packaged Weight	0.40 lbs
Package Dimensions	7.5 x 7.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

7" (Thickness 1.6mm) — Arbor: 5/8" — Wet Use — QZ0758

Part No.	QZ0758
UPC	749173461958
Size	7" (Thickness 1.6mm)
Type	Wet Use
Attachment	Arbor: 5/8"
Max RPM	8,400
Recommended For	Tile Saw
Packaged Weight	0.70 lbs
Package Dimensions	6.5 x 6 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

8" (Thickness 1.6mm) — Arbor: 5/8" — Wet Use — QZ0858

Part No.	QZ0858
UPC	749173461927
Size	8" (Thickness 1.6mm)
Type	Wet Use
Attachment	Arbor: 5/8"
Max RPM	7,400
Recommended For	Tile Saw
Packaged Weight	0.80 lbs
Package Dimensions	9 x 8.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

9" (Thickness 2.1mm) — Arbor: 7/8", Quad-W5 — Wet Use — QZ0978

Part No.	QZ0978
UPC	749173462542
Size	9" (Thickness 2.1mm)
Type	Wet Use
Attachment	Arbor: 7/8", Quad-W5
Max RPM	6,600
Recommended For	Electric Angle Grinder / Demolition Saw
Packaged Weight	1.10 lbs
Package Dimensions	10.5 x 10.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

10" (Thickness 2.0mm) — Arbor: 5/8" — Wet Use — QZ1058

Part No.	QZ1058
UPC	749173461934
Size	10" (Thickness 2.0mm)
Type	Wet Use
Attachment	Arbor: 5/8"
Max RPM	5,900
Recommended For	Tile Saw
Packaged Weight	1.50 lbs
Package Dimensions	10.5 x 10.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

10" (Thickness 2.0mm) — Arbor: 1", 5/8" — Wet Use — QZ1001

Part No.	QZ1001
UPC	749173462177
Size	10" (Thickness 2.0mm)
Type	Wet Use
Attachment	Arbor: 1", 5/8"
Max RPM	5,900
Recommended For	Portable Rail Saw
Packaged Weight	1.50 lbs
Package Dimensions	10.5 x 10.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

12" (Thickness 2.1mm) — Arbor: 1" — Wet/Dry Use — QZ1201

Part No.	QZ1201
UPC	749173462511
Size	12" (Thickness 2.1mm)
Type	Wet/Dry Use
Attachment	Arbor: 1"
Max RPM	6,200
Recommended For	Portable Rail Saw
Package Dimensions	12.5 x 12.5 x 0.25 in
Commodity Code	8202.91.0000
Country of Origin	Japan

Common Specifications

Property	Detail
Blade Type	Turbo rim diamond blade
Bond	Sintered (metal bond)
Application	Quartzite, granite, marble, engineered stone, porcelain & ceramic tile
Cooling	Wet (4-1/2", 5" & 12" also rated Wet/Dry)
Commodity Code	8202.91.0000
Country of Origin	Japan

Related & Companion Products

FAQs

Which way do I install the blade on my tool?

The blade direction is printed on the front of the blade. Install the blade so that it follows this direction. If the front is no longer legible, a directional arrow is embossed into the back. As a last resort, examine the diamonds: the bond tail behind each diamond should point opposite to the direction of rotation. Installing the blade backwards reverses the bond tails and may cause premature wear.

What materials can I cut with the Alpha® Q-Cut blade?

The Q-Cut wet blade series is primarily designed for granite, marble and engineered stone slabs or tiles. The Q-Cut 4-1/2" and 5" blades are designed for porcelain and ceramic tiles and may be used either wet or dry.

Can I cut Onyx with the Alpha® Q-Cut blade?

No. We do not recommend cutting Onyx with Q-Cut blades due to the aggressive cutting action, diamond grit size and turbo rim style. For Onyx, use the Alpha® Vetro blade designed for glass: its continuous rim with finer diamonds minimizes edge chipping.

Can I use the Alpha® Q-Cut blade dry?

The 4-1/2" and 5" Q-Cut blades can be used wet or dry on hand power tools such as the Alpha® AWS-110, AWS-125 and high-speed angle grinders. The 12" QZ1201 is also rated Wet/Dry. All other Q-Cut sizes must be used wet at all times.

My cut is slowing down. What can I do?

The diamonds have rounded over or glazed and the blade is losing its cutting ability. Re-dress the blade by making a few cuts into a soft abrasive material such as a dressing stone or concrete block to expose fresh diamonds.

What is the maximum RPM for each Q-Cut blade?

See the Max RPM column in the Models / Part Numbers table above — values range from 5,900 RPM (10") up to 13,200 RPM (4-1/2"). Never exceed the rating printed on the blade.

What arbor sizes are available?

Arbor availability varies by diameter — see the Arbor column in the Models / Part Numbers table.

Videos

Making a V40 Laminated Bullnose Edge with Alpha® Tools

Documentation

⚠ WARNING: This product can expose you to chemicals including Cobalt and Nickel, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. Always wear appropriate PPE.