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) .dst-accordion { margin-top: 25px; border: 1px solid #FDDCC5; border-radius: 6px; overflow: hidden; } .dst-accordion-item { border-bottom: 1px solid #FDDCC5; } .dst-accordion-item:last-child { border-bottom: none; } .dst-accordion-toggle { display: none; } .dst-accordion-label { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; cursor: pointer; font-size: 17px; font-weight: 700; color: #231F20; background: #fff; transition: background 0.2s; } .dst-accordion-label:hover { background: #FFF3EB; } .dst-accordion-label::after { content: '+'; font-size: 22px; font-weight: 700; color: #F15C22; transition: transform 0.3s; } .dst-accordion-toggle:checked + .dst-accordion-label { background: #FFF3EB; } .dst-accordion-toggle:checked + .dst-accordion-label::after { content: '\2212'; } .dst-accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 20px; background: #fff; } .dst-accordion-toggle:checked ~ .dst-accordion-content { max-height: 5000px; padding: 15px 20px 20px; } 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 Alpha® Twincur™ GEM-V Hook-&-Loop Polishing Wheel Alpha® Twincur™ CFP C-Frame Polishing System Alpha® SFAT-5/8 Snail-Lock Adapter 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. VideosNo product-specific videos are currently available from the manufacturer or DST. Documentation 📄 Twincur GEM Flyer 📄 Twincur Information Chart (2025) 📄 Polishing Machine Reference Chart — Recommended Parameters ⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.
