Frequently Asked Questions

Grinding Ring

    1. When will I be able to order additional grinding rings?

      Right now. Head on over to the shop. Grinding Rings are available in all sizes.

    2. How long does a Grinding Ring last?

      A Grinding Ring (Radius Ring or FIRE Ring) will last about 40 skate sharpenings. Ultimately, it depends on how the user selects their cycles; if you're using one or two passes in between each skating session, you'll get more, and if you're waiting over the recommended 4-5 hours of skating between sharpenings, you may end up running more than 4 cycles and in-turn get less than 40. 

    3. How does the Grinding Ring know when it's out of sharpenings?

      Inside of the Grinding Ring there's an RFID chip that communicates with the Sharpener. This information is stored on each individual Grinding Ring and relayed to the Ring Life Status Bar on the Menu Pad. 

    4. Do you offer a Flat Bottom sharpening?

      Yes! Our patented FIRE (Flat Inside Radius Edges) Ring produces a flat bottom hollow. 

    5. How much does a Grinding Ring cost?

      Grinding Rings are $49.99 and can be purchased here.

    6. How do I know which Grinding Ring to choose?

      While there are many options available, the most common grinding rings are the 1/2" and the 5/8" Radius Ring™. Through our testing, we have determined that a 1/2" Radius Ring is a great starting point for smaller, younger players. Many adult players skate on a 1/2" radius as well. We have, however, found that larger, heavier players actually do quite well on the 5/8" radius. A flatter radius, the 5/8" allows heavier players to sufficiently grab an edge for turning and stopping but provides great glide as more of the blade remains above the ice surface.

    7. What is the difference between a Radius Ring™ and a FIRE Ring™?

      The easiest answer is that the Radius Ring™ produces a traditional "radius of hollow" (ROH) sharpening. Unless you know you skate on a flat-bottom profile, you will likely want to choose the Radius Ring at checkout. The Radius Rings work for both player skates and goalie skates. The FIRE Ring™ produces a flat-bottom cut with radius edges. You can find more information on the Grinding Rings page or in this blog post

    8. Why doesn't the Grinding Ring produce sparks?

      The most significant factor is the grinding ring used by Sparx. Our grinding ring is made with a completely different material than a traditional grinding wheel. We're using a synthetic diamond abrasive. This different abrasive material results in a cooler sharpening process and also a cooler swarf. What's a swarf you say (besides a fantastic scrabble word)? Swarf is the technical term for the fine metal dust that is thrown off the skate blade as it is sharpened. Since the swarf is not as hot in the Sparx process, it is not as visibly bright as it would be in a traditional sharpening. Skate blade material also plays a part in this equation. Some skate steel that contains a greater percentage of carbon (skates from 10+ years ago)and even newer nitinol blades (a nickel-titanium alloy) will show a hot/bright swarf (nitinol swarf is hot white - which is very cool).