Alpha PVA QC Style

Alpha® PVA QC Style — Quick-Change Dry Polishing Discs

The Alpha® PVA QC "Quick Change" System is a low-speed version of the original PVA MS style, designed to run on an aluminum snail-lock backer plate developed for low-speed polishing tools such as the Alpha AIR-680. The discs snail-lock straight into the SFAT adapter, so grit changes take seconds. PVA QC delivers a beautiful, wax-free finish on glass tile, marble, limestone, travertine and stainless steel.

Features

Quick-change snail-lock mounting — swap grits in seconds
Ideal for glass tile, marble, limestone, travertine, baseboard and countertop edges
Polishes stainless steel to a mirror-like finish with no wax or compound
4" discs also remove paint and rust without clogging
Color-coded grit sequence: White (40), Red (80), Blue (220), Green (400), Yellow (600)
Maximum safe speed 4,000 RPM — for low-speed polishers and variable-speed grinders run at low range
Fast working, long lasting, affordable
Available in boxes of 5 (PVAQC…), single wheels (SPVAQC…), or a 5-piece assortment (PVAQCK)

Models / Part Numbers

Part No.	Size	Finish	Grit	Color	Pack	UPC
PVAQCW	4"	Extra Coarse	40	White	5 / box	749173040023
PVAQCR	4"	Coarse	80	Red	5 / box	749173040030
PVAQCB	4"	Medium	220	Blue	5 / box	749173040047
PVAQCG	4"	Fine	400	Green	5 / box	749173040054
PVAQCY	4"	Extra Fine	600	Yellow	5 / box	749173040061
PVAQCK	4"	Assortment Kit	40 / 80 / 220 / 400 / 600	All 5 Colors	1 of each (5 wheels)	749173040016
SPVAQCW	4"	Extra Coarse	40	White	Single	749173040153
SPVAQCR	4"	Coarse	80	Red	Single	749173040160
SPVAQCB	4"	Medium	220	Blue	Single	749173040177
SPVAQCG	4"	Fine	400	Green	Single	749173040184
SPVAQCY	4"	Extra Fine	600	Yellow	Single	749173040191

How to Use

Mount the Alpha® PVA-5/8 backer pad (5/8"-11 thread, sold separately) onto your low-speed polisher or variable-speed grinder.
Snap a PVA QC disc into the SFAT snail-lock adapter.
Run DRY only — never use water; PVA acts like a sponge and will expand if wet.
Polish in sequence: White (40) → Red (80) → Blue (220) → Green (400) → Yellow (600). Do not skip grits.
Keep speed at or below 4,000 RPM — on a variable-speed tool set it to the lower range.
No buffing compound or wax is required — the Yellow (600) wheel leaves a high-gloss finish on its own.

Specifications by Variant

White — 4" — Snail Lock (QC) — Extra Coarse — Grit 40 — PVAQCW

Part No.	PVAQCW
UPC	749173040023
Size	4"
Type	Extra Coarse — Grit 40
Color	White
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	5 / box
Packaged Weight	1.00 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

Red — 4" — Snail Lock (QC) — Coarse — Grit 80 — PVAQCR

Part No.	PVAQCR
UPC	749173040030
Size	4"
Type	Coarse — Grit 80
Color	Red
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	5 / box
Packaged Weight	1.30 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

Blue — 4" — Snail Lock (QC) — Medium — Grit 220 — PVAQCB

Part No.	PVAQCB
UPC	749173040047
Size	4"
Type	Medium — Grit 220
Color	Blue
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	5 / box
Packaged Weight	1.30 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

Green — 4" — Snail Lock (QC) — Fine — Grit 400 — PVAQCG

Part No.	PVAQCG
UPC	749173040054
Size	4"
Type	Fine — Grit 400
Color	Green
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	5 / box
Packaged Weight	1.10 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

Yellow — 4" — Snail Lock (QC) — Extra Fine — Grit 600 — PVAQCY

Part No.	PVAQCY
UPC	749173040061
Size	4"
Type	Extra Fine — Grit 600
Color	Yellow
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	5 / box
Packaged Weight	1.00 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

All 5 Colors — 4" — Snail Lock (QC) — Assortment Kit — Grit 40 / 80 / 220 / 400 / 600 — PVAQCK

Part No.	PVAQCK
UPC	749173040016
Size	4"
Type	Assortment Kit — Grit 40 / 80 / 220 / 400 / 600
Color	All 5 Colors
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	1 of each (5 wheels)
Packaged Weight	1.20 lbs
Package Dimensions	5in x 4.25in x 4.25in
Commodity Code	6804.22.0000
Country of Origin	Japan

White — 4" — Snail Lock (QC) — Extra Coarse — Grit 40 — SPVAQCW

Part No.	SPVAQCW
UPC	749173040153
Size	4"
Type	Extra Coarse — Grit 40
Color	White
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	Single
Packaged Weight	0.20 lbs
Package Dimensions	7in x 5in x 0.5in
Commodity Code	6804.22.0000
Country of Origin	Japan

Red — 4" — Snail Lock (QC) — Coarse — Grit 80 — SPVAQCR

Part No.	SPVAQCR
UPC	749173040160
Size	4"
Type	Coarse — Grit 80
Color	Red
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	Single
Packaged Weight	0.30 lbs
Package Dimensions	7in x 5in x 0.5in
Commodity Code	6804.22.0000
Country of Origin	Japan

Blue — 4" — Snail Lock (QC) — Medium — Grit 220 — SPVAQCB

Part No.	SPVAQCB
UPC	749173040177
Size	4"
Type	Medium — Grit 220
Color	Blue
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	Single
Packaged Weight	0.30 lbs
Package Dimensions	7in x 5in x 0.5in
Commodity Code	6804.22.0000
Country of Origin	Japan

Green — 4" — Snail Lock (QC) — Fine — Grit 400 — SPVAQCG

Part No.	SPVAQCG
UPC	749173040184
Size	4"
Type	Fine — Grit 400
Color	Green
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	Single
Packaged Weight	0.20 lbs
Package Dimensions	7in x 5in x 0.5in
Commodity Code	6804.22.0000
Country of Origin	Japan

Yellow — 4" — Snail Lock (QC) — Extra Fine — Grit 600 — SPVAQCY

Part No.	SPVAQCY
UPC	749173040191
Size	4"
Type	Extra Fine — Grit 600
Color	Yellow
Attachment	Snail Lock (QC)
Max RPM	4,000 RPM
Recommended For	Single
Packaged Weight	0.20 lbs
Package Dimensions	7in x 5in x 0.5in
Commodity Code	6804.22.0000
Country of Origin	Japan

Common Specifications

Property	Detail
Diameter	4"
Maximum RPM	4,000
Mounting	Snail Lock (SFAT adapter) on PVA-5/8 backer pad
Backer Thread	5/8"-11 (backer sold separately)
Application	Dry use only — never with water
Materials	Glass tile, marble, limestone, travertine, stainless steel and many metals
Compatible Tools	Alpha AIR-680, Makita 9207 SPC, Bosch 9250, AEG WP1900, Milwaukee 5460/5540/5455/5535, and other variable-speed grinders at ≤4,000 RPM
Commodity Code	6804.22.0000
Country of Origin	Japan

Related & Companion Products

FAQs

Can I use water while polishing with PVA?

No. PVA QC is designed for dry polishing only. Water causes the PVA to act like a sponge and expand, which is dangerous and can cause the wheel to disintegrate.

Can I polish granite with PVA QC?

No. PVA is intended for softer materials like marble, travertine and onyx. Granite's density causes the wheels to overheat and melt. For granite, use Alpha's Ceramica or Ceramica EX wet systems.

What is the grit sequence?

White (40), Red (80), Blue (220), Green (400), Yellow (600). Each higher grit removes the scratches from the previous one.

Can I skip grits?

No. Skipping grits lengthens processing time, shortens abrasive life, and usually leaves an unsatisfactory finish.

What is the maximum RPM?

4,000 RPM. Use only low-speed polishers, or variable-speed grinders set to 4,000 RPM or lower.

Do I need buffing compound or wax to finish?

No. A key advantage of PVA QC is that it leaves a beautiful, high-gloss finish without any compound or wax.

How do I mount the PVA QC discs?

Thread the Alpha PVA-5/8 backer pad (sold separately) onto your tool. The backer has 5/8"-11 threads and a built-in SFAT snail-lock adapter; the PVA QC wheel snail-locks straight into it.

Can I run PVA QC on a high-speed grinder?

No. 4,000 RPM is the maximum. For high-speed dry polishing, use Alpha PVA VP or PVA MS.

Which tools is PVA QC compatible with?

Any variable-speed tool that can run at or below 4,000 RPM. Common compatible models: Makita 9207 SPC, Bosch 9250, AEG WP1900, Milwaukee 5460 / 5540 / 5455 / 5535, and Alpha AIR-680.

Can I buy single wheels instead of a box of five?

Yes. The SPVAQC… part numbers are single discs. Boxes of 5 (PVAQC…) and a 5-piece assortment kit (PVAQCK) are also available.

Does PVA work on metal?

Yes. PVA was originally designed for the metal industry and works very well on stainless steel and many other metals.

Can I use PVA on glass?

Yes. After cutting or scoring glass, use the Red and Blue PVA QC discs to ease the edges.

Does the backer pad come in other arbor sizes?

Yes — call us for availability of optional arbor sizes.

What is the small bag inside each wheel pack?

A silica-gel desiccant to prevent moisture absorption during storage.

Videos

PVA QC Polishing Discs

Documentation

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

Size	PVA-5/8, PVAQCB, PVAQCG, PVAQCK, PVAQCR, PVAQCW, PVAQCY, SPVAQCB, SPVAQCG, SPVAQCR, SPVAQCW, SPVAQCY
Brand	Alpha
Wet / Dry Use	Dry