affuteur: quand vous affutez, quel roh vous faites pour quel patineur?

[marc]

Je voulais savoir quel roh vous pratiquez dans vos pays?

cela fait 3 ans que j'affute et je vais vous dire les roh que je pratique:

5.5/16 :pour les confirmés, poids normal, pour les sauts simple et double , pour la danse solo niveau national
6/16:   pour ceux qui ont un niveau moyen et qui commance à patiner avec un coté de la lame( carre)
6.5/16:  pour les débutants, adultes et les patineurs un peu costaud

Je me demande s'ils ne se sont pas habitué à cela ...
quand j'essaie de chercher, je trouve pas grand chose si ce n'est que le roh classique est 1/2 pouce.
Et je me demande si je ne fais pas trop creux....

un ancien patineur de notre club qui faisait les triples saut faisait encore plus creux que 5.5/16 alors que moi je trouve que c'est déjà tres creux!!

Alors je voulais avoir un peu vos avis...

Bien à vous tous dans vos différents pays et merci de m'eclairer un petit peu

[Query]

There is no single standard.

I believe studies have shown that the most common hockey ROH in NHL (The major professional league in Canada and Mexico) is 1/2". But the online advice has been that it should depend on the skater's weight and aggressiveness. E.g., a lighter skater, or one who isn't very aggressive skater needs sharper blades, which is taken to mean a lower ROH. The variation with weight and aggressiveness makes sense for figure skaters too.

And I think that most people I know stay with the ROH the blade comes from the factory with - at least on factory pre-sharpened blades. That usually means 7/16" for most figure skating blades, but 3/8" for MK Dance (because it is ground "thinline" - thinner at the bottom of the blade).

But Mike C told me that many people in New York City used 1/4". And for some reason a lot of the hand tool sharpeners available cheap from China are that.

And the few people I've known who did school figures - which is now similar to what is called "skating skills" in the U.S., want longer glides, so they sometimes choose 3/4" or even 1".

I'm not sure if it makes sense to use a different ROH on synthetic (lubricated plastic) ice. Edges wear out so fast that maybe people choose higher ROH??

The best skate techs I've known give the skater what they ask for. Or they try to copy what the skater already has.

Most skate techs remove the sharpening burr, by using a flat stone, slanted slightly inwards towards the centerline of the hollow. That makes the blade less sharp, and the amount of it you use might vary. Coarse grain wheels and stones also produce a less sharp edge than fine grain wheels and stones. And the rocker length affects effective sharpness too. So ROH isn't the only factor in sharpness.

Also, some blades are said to have a dovetail shape - meaning that the sides of the blade near the bottom slant inwards, which means that the angle included between the hollow surface and the sides is less. In theory, that would let you use a longer ROH to get the same angle.

The speed skaters and Nordic ice skaters I've talked to about this say they don't use hollow.