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Detuning your edge

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zandy
Posts: 9 - Karma: 120
What tools do i need to detune under boot of my park ski? Do i just need a file and how do i rub it on the edge ??
Oct 15 2021 7:49AM
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switchlip2
Posts: 2070 - Karma: 24,396
https://youtu.be/CL4FIR2lmKo
this video helped me when I first got into park a few years ago. Pretty easy to understand after watching once
Oct 15 2021 7:57AM
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BradFiAusNzCoCa
Posts: 6910 - Karma: 60,189
File, gummy stone and (optionally) Diamond stone.
Oct 15 2021 8:01AM
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CarsonLentz
Posts: 159 - Karma: 1,415
I would recommend the gummy stone method.
Oct 15 2021 8:04AM
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tominiemenmaa
Posts: 573 - Karma: 3,387
An angle grinder gets the job done in a minute if you know what youre doing. You can also fuck your skis in a second permanently if you don't.

I grind my skis perfectly round & smooth from tips, tails, and under the bindings.

**This post was edited on Oct 15th 2021 at 9:25:31am
Oct 15 2021 9:24AM
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BradFiAusNzCoCa
Posts: 6910 - Karma: 60,189
That’s horrifying lmao
tominiemenmaaAn angle grinder gets the job done in a minute if you know what youre doing. You can also fuck your skis in a second permanently if you don't.

I grind my skis perfectly round & smooth from tips, tails, and under the bindings.

**This post was edited on Oct 15th 2021 at 9:25:31am
Oct 15 2021 9:45AM
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tominiemenmaa
Posts: 573 - Karma: 3,387
I'm a welder by trade so it's the most natural tool for me :)
BradFiAusNzCoCaThat’s horrifying lmao
Oct 15 2021 10:13AM
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teabag
Posts: 691 - Karma: 4,973
I just used an old ass file I found and since the result wasn’t that smooth I bought a ’Toko Universal Edge Grinder’ for 8€ or what ever it’s name was and smoothened the edges with it. It’s very simple, you really don’t need to spend money on a diamond file.
Oct 15 2021 10:19AM
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BradFiAusNzCoCa
Posts: 6910 - Karma: 60,189
The grinder I get but the up and down tip to tail is the horrifying part haha
tominiemenmaaI'm a welder by trade so it's the most natural tool for me :)
Oct 15 2021 11:26AM
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Paul.
Posts: 1587 - Karma: 10,952
@DominatorJacques has a wonderful tutorial that will help you achieve the perfect detune. You have to watch the whole thing start to finish though or else you might miss some important steps

https://www.newschoolers.com/videos/watch/849783/Ski-Tuning-How-To-By-Hand-Park-Special
Oct 15 2021 12:39PM
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DominatorJacques
Posts: 11231 - Karma: 76,327
Keep in mind, this shows every step repeated on every edge. (long story, was a dare).
One can use YT speed up, and poke through the deal.
Most important is the "Long Base Bevel" that means you bevel the base edge 1 to 2 mm's into the plastic. Done right, no need to round the edges under foot. Eventually, they will do that riding rails. This needs to be done BEFORE you ride any rails. Once work hardened from rail banging, it will be very hard to file an edge.
Anyway, the world's longest tuning video is filled with entertaining talk! Get some laughs!
Paul.@DominatorJacques has a wonderful tutorial that will help you achieve the perfect detune. You have to watch the whole thing start to finish though or else you might miss some important steps

https://www.newschoolers.com/videos/watch/849783/Ski-Tuning-How-To-By-Hand-Park-Special
Oct 15 2021 12:56PM
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sarc
Posts: 246 - Karma: 1,879
I don't understand the use of a gummi stone in tuning. It was suggested to me as a way to deburr, so I get one and rub it on there and it doesn't seem to do a thing. Maybe it polishes?

Any one have a good use for this thing or should I throw it out?
Oct 15 2021 1:52PM
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BradFiAusNzCoCa
Posts: 6910 - Karma: 60,189
It dulls the jagged pieces and smooths over the edge. This is for increasing your file life and making an edge less hooky at the end
sarcI don't understand the use of a gummi stone in tuning. It was suggested to me as a way to deburr, so I get one and rub it on there and it doesn't seem to do a thing. Maybe it polishes?

Any one have a good use for this thing or should I throw it out?
Oct 15 2021 3:22PM
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DominatorJacques
Posts: 11231 - Karma: 76,327
sarcI don't understand the use of a gummi stone in tuning. It was suggested to me as a way to deburr, so I get one and rub it on there and it doesn't seem to do a thing. Maybe it polishes?

Any one have a good use for this thing or should I throw it out?

They can polish, but are too soft for maintaining an edge angle.
They are best used to remove micro hairs of steel after a tune.
Here, check this out at 1:45. Link should take you there.
https://youtu.be/_hsxuAaMjts?list=PLADABC267A2F54961&t=105

A polishing stone would work way better than a gummi stone for a detuning.
Such as these and many others. https://www.borideabrasives.com/PublicStore/product/AM-2,21,296.aspx
Oct 15 2021 4:37PM
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bennwithtwons
Posts: 1307 - Karma: 9,951
Just slide rails for a couple days and your edges will be sufficiently detuned. You don’t need to remove any material that way, which will help increase the longevity of your edges. Then just keep the edge ‘clean’ with some of the previously mentioned tools and you’ll be in good shape.
Oct 15 2021 7:26PM
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animator
Posts: 4552 - Karma: 26,236
bennwithtwonsJust slide rails for a couple days and your edges will be sufficiently detuned. You don’t need to remove any material that way, which will help increase the longevity of your edges. Then just keep the edge ‘clean’ with some of the previously mentioned tools and you’ll be in good shape.


I think this depends on your definition of longevity. For park skiers, it’s making sure they don’t crack, in which case you’re wrong and detuning most definitely increases the longevity.
Oct 15 2021 7:39PM
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bennwithtwons
Posts: 1307 - Karma: 9,951
I’ve had edges crack much more quickly after detuning. I think it is a result of losing the extra edge material. The more edge you have, the more slowly the temperature increases and decreases as you go from grind to cold snow, reducing the fatigue of the metal. If half of your edge gets ground away, it leaves too little to deal with those stresses. I just let the skis detune on their own (it doesn’t take long) and remove any snags or burrs that develop. It also means I don’t round over parts of the skis that don’t touch the rails too much, leaving them sharp enough to still get a bit of edge grip when it’s firm. This has been my experience anyway, and I think the logic is sound. Results may vary!
animatorI think this depends on your definition of longevity. For park skiers, it’s making sure they don’t crack, in which case you’re wrong and detuning most definitely increases the longevity.


**This post was edited on Oct 15th 2021 at 9:06:18pm

**This post was edited on Oct 15th 2021 at 9:06:41pm
Oct 15 2021 9:05PM
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DominatorJacques
Posts: 11231 - Karma: 76,327
bennwithtwonsJust slide rails for a couple days and your edges will be sufficiently detuned. You don’t need to remove any material that way, which will help increase the longevity of your edges. Then just keep the edge ‘clean’ with some of the previously mentioned tools and you’ll be in good shape.


Okay, but not the best idea. Ski edges should be worked on BEFORE riding rails, so they last longer, and don't "catch".
A long base bevel will not remove much edge metal, but will help in so many ways.
1. no catching. High edges at the base edge interface are not good.
2. slightly raising the edge from the base plastic will help it to not slam so hard, thus retard the cracking issues.
Oct 15 2021 9:55PM
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sarc
Posts: 246 - Karma: 1,879
I see, gummi can be used to soften hardened metal a bit, and remove the finest final imperfections. Thanks for listening!
Oct 15 2021 11:18PM
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