Blade Quality

The importance of even edges and straight blades
There are several reasons why blades may be bent. Blades may be bent from use, improperly mounted runners, or runners bent before being mounted. If we discover an incorrectly mounted blade, we will recommend it being repaired before sharpening or contouring.

There are two causes for uneven edges, 1) Improper Height Adjustment and 2) Bent Blade.
 
  1) Improper Height Adjustment
Improper height adjustment is the most common reason for uneven edges. It happens when the blade doesn't line up to the centre line of the grinding wheel as depicted in the drawing to the left.
 
    2) Bent Blade
A bent blade will never have even edges along the entire blade. In the middle section there may be a square edge, but the edges in the heel and toe will be uneven.

The drawing to the left shows how edges look when they are unevenly shaped either due to improper height adjustment or a bent blade.

Uneven edges are the biggest problem seen on skates. When the edges are uneven, they feel like they are dull on one side and extremely sharp on the other. In the case of a bent blade, edges are unevenly sharp for the length of the blade. When the unevenness is too great, the skater will find no predictability in the performance of the blade.

ROH sharpening is a little more forgiving towards poor sharpening whereas FBV sharpening requires both edges to even for the length of the blade. For either sharpening methods to perform well, we recommend they be done on straight blades only.