Alpha Professional Tools Twincur GEM

Alpha® Twincur™ GEM Snail-Lock Edge Polishing Wheel 5", #50 (GEM50050)

The Alpha® Twincur™ GEM combines the proven Twincur EG and ES edge-polishing systems into a single snail-lock wheel that handles every common slab material — granite, marble, engineered stone/quartz and sintered surfaces — both straight and beveled edges. One wheel set replaces the two-system inventory many shops keep on hand, saving time, money and storage space. A “Tsuya” final-polish wheel is available to bring edges to the highest possible shine. This listing is GEM50050: 5" diameter, #50 grit, snail-lock backing.

Features

One polishing system for all stone types — granite, marble, engineered stone/quartz, sintered slabs
Polishes straight and beveled edges with the same wheel set
Fast, consistent results and long wheel life reduce downtime
Snail-lock (SFAT) backing fits most popular edge-polishing machines
Tsuya final-polish wheel available for highest-gloss finish
Color-coded resin bond at each grit for fast wheel identification on the machine
Available 5" and 6" diameters, eight grits (#50, #100, #200, #500, #1000, #2000, #3000, Tsuya)

Models / Part Numbers

Part No.	Diameter	Grit	Color	Max RPM	UPC
GEM50050	5"	#50	Green	2,000 RPM	749173472909
GEM50100	5"	#100	Blue	2,000 RPM	749173472008
GEM50200	5"	#200	Yellow	2,000 RPM	749173472015
GEM50500	5"	#500	Red	2,000 RPM	749173472022
GEM51000	5"	#1000	Dark Green	2,000 RPM	749173472039
GEM52000	5"	#2000	Light Green	2,000 RPM	749173472046
GEM53000	5"	#3000	Brown	2,000 RPM	749173472053
GEM5TSUYA	5"	Tsuya	Black	2,000 RPM	749173472695
GEM60050	6"	#50	Green	2,000 RPM	749173472916
GEM60100	6"	#100	Blue	2,000 RPM	749173472169
GEM60200	6"	#200	Yellow	2,000 RPM	749173472176
GEM60500	6"	#500	Red	2,000 RPM	749173472183
GEM61000	6"	#1000	Dark Green	2,000 RPM	749173472190
GEM62000	6"	#2000	Light Green	2,000 RPM	749173472206
GEM63000	6"	#3000	Brown	2,000 RPM	749173472213
GEM6TSUYA	6"	Tsuya	Black	2,000 RPM	749173472701

How to Use

Mount the GEM wheel directly on any edge-polishing machine with a Snail-Lock (SFAT) spindle. For 5/8"-11 spindles, use the Alpha SFAT-5/8 adapter.
Verify machine no-load RPM does not exceed 2,000 RPM — the maximum operating speed for Twincur GEM.
Run wet only. Feed clean water at the wheel face throughout the polish.
Progress through grits in order: #50 → #100 → #200 → #500 → #1000 → #2000 → #3000 → Tsuya. Skipping grits leaves visible scratch patterns.
Use light, even pressure — let the wheel do the work. Excess pressure shortens wheel life and dulls the polish.
Use the 31mm Twincur wrench (Alpha part 520000) to install or remove wheels.
Rinse and inspect each wheel between grits; replace when the diamond layer is worn flush with the resin matrix.

Specifications by Variant

Twincur GEM Snail-Lock Polishing Wheel 5", #50 — GEM50050

Part No.	GEM50050
UPC	749173472909
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #50
Max RPM	2,000 RPM
Packaged Weight	0.50 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #100 — GEM50100

Part No.	GEM50100
UPC	749173472008
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #100
Max RPM	2,000 RPM
Packaged Weight	0.50 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #200 — GEM50200

Part No.	GEM50200
UPC	749173472015
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #200
Max RPM	2,000 RPM
Packaged Weight	0.50 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #500 — GEM50500

Part No.	GEM50500
UPC	749173472022
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #500
Max RPM	2,000 RPM
Packaged Weight	0.40 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #1000 — GEM51000

Part No.	GEM51000
UPC	749173472039
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #1000
Max RPM	2,000 RPM
Packaged Weight	0.40 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #2000 — GEM52000

Part No.	GEM52000
UPC	749173472046
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #2000
Max RPM	2,000 RPM
Packaged Weight	0.40 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", #3000 — GEM53000

Part No.	GEM53000
UPC	749173472053
Type	Twincur GEM Snail-Lock Polishing Wheel 5", #3000
Max RPM	2,000 RPM
Packaged Weight	0.40 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 5", Tsuya — GEM5TSUYA

Part No.	GEM5TSUYA
UPC	749173472695
Type	Twincur GEM Snail-Lock Polishing Wheel 5", Tsuya
Max RPM	2,000 RPM
Packaged Weight	0.30 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #50 — GEM60050

Part No.	GEM60050
UPC	749173472916
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #50
Max RPM	2,000 RPM
Packaged Weight	0.55 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #100 — GEM60100

Part No.	GEM60100
UPC	749173472169
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #100
Max RPM	2,000 RPM
Packaged Weight	0.55 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #200 — GEM60200

Part No.	GEM60200
UPC	749173472176
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #200
Max RPM	2,000 RPM
Packaged Weight	0.55 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #500 — GEM60500

Part No.	GEM60500
UPC	749173472183
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #500
Max RPM	2,000 RPM
Packaged Weight	0.55 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #1000 — GEM61000

Part No.	GEM61000
UPC	749173472190
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #1000
Max RPM	2,000 RPM
Packaged Weight	0.45 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #2000 — GEM62000

Part No.	GEM62000
UPC	749173472206
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #2000
Max RPM	2,000 RPM
Packaged Weight	0.45 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", #3000 — GEM63000

Part No.	GEM63000
UPC	749173472213
Type	Twincur GEM Snail-Lock Polishing Wheel 6", #3000
Max RPM	2,000 RPM
Packaged Weight	0.45 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Twincur GEM Snail-Lock Polishing Wheel 6", Tsuya — GEM6TSUYA

Part No.	GEM6TSUYA
UPC	749173472701
Type	Twincur GEM Snail-Lock Polishing Wheel 6", Tsuya
Max RPM	2,000 RPM
Packaged Weight	0.35 lbs
Commodity Code	6804.21.0000
Country of Origin	Japan

Common Specifications

Property	Detail
Type	Resin-bond diamond snail-lock polishing wheel
Backing	Snail Lock (SFAT)
Recommended For	All stone types — granite, marble, engineered stone/quartz, sintered slabs
Edge Profiles	Straight and beveled
Grits Available	#50, #100, #200, #500, #1000, #2000, #3000, Tsuya (final polish)
Diameters Available	5", 6"
Max RPM	2,000 RPM
Use	Wet only, on edge-polishing machine
Country of Origin	Japan

Related & Companion Products

FAQs

Can I use Twincur GEM on both granite and engineered stone?

Yes. The GEM is engineered as a single polishing system for all stone types — granite, marble, engineered stone/quartz and sintered slabs. It replaces the separate EG (granite) and ES (engineered stone) lines.

What grits should I run in sequence?

Progress in order: #50, #100, #200, #500, #1000, #2000, #3000, then Tsuya for final polish. Skipping grits leaves scratch patterns that will not lift in the next step.

Wet or dry?

Wet only. Feed water at the wheel face during the entire polish — this clears swarf, cools the bond and protects wheel life.

What is the Tsuya wheel?

Tsuya (Japanese for “gloss”) is the final-polish wheel in the GEM line. It is run after #3000 to bring the edge to the highest possible shine on all stone types.

Will it fit my edge polisher?

GEM wheels use a Snail-Lock (SFAT) backing that fits most popular edge-polishing machines. For 5/8"-11 spindles, use the Alpha SFAT-5/8 adapter.

What is the max safe RPM?

2,000 RPM. Confirm your polisher no-load speed before mounting.

How do I install or change a wheel?

Use the 31mm Twincur wrench (Alpha part 520000). Hand-tight plus a quarter turn is typically sufficient.

Is there a recommended pressure?

Light, even pressure. The diamond does the cutting — excess force shortens wheel life and dulls the resulting polish.

Videos

No product-specific videos are currently available from the manufacturer or DST.

Documentation

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