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Speed Skating Forum Most of the discussions in this forum will be about inline speed skating but discussions about ice speed skating and quad roller speed skating are also welcome.

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Old January 28th, 2017, 04:42 AM   #1
jcardin
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Default One piece axles - aluminum only?

That is my question. Are all speed skate one-piece axles made out of aluminum or are steel axles available also?

Seems odd to have skate axles in aluminum to begin with. Has anyone experienced problems with their use?
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Old January 28th, 2017, 01:19 PM   #2
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Originally Posted by jcardin View Post
That is my question. Are all speed skate one-piece axles made out of aluminum or are steel axles available also?

Seems odd to have skate axles in aluminum to begin with. Has anyone experienced problems with their use?
When Inlines first came out, some axles were 2 piece or even 3. Aluminum threaded sleeve and steel screws.

They are aluminum due to weight and cost to make.

Only problems I've ever encountered were from over-tightening of the axles.
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Old January 28th, 2017, 01:30 PM   #3
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Steel corrodes more than aluminum. if a axel strips out (threads or head), aluminum is easier to drill out of the frame, without doing damage.

steel could also corrode and bond to the aluminum.
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Old January 28th, 2017, 04:52 PM   #4
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Stainless steel should help with corrosion issues so the biggest problems would then be extra weight and possibly more risk of scratching the frames from their use.
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Old January 29th, 2017, 01:01 AM   #5
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Originally Posted by jcardin View Post
Stainless steel should help with corrosion issues so the biggest problems would then be extra weight and possibly more risk of scratching the frames from their use.
I think the bigger issue is galvanic corrosion on the threads basically welding them together, not the steel itself rusting. Happens on axles of different alloy that the frames sometimes already, or say aluminum axles into a mag frame, etc. And yeah, if you screw a steel axle up you'd have a hard time removing it without damage otherwise. I'd also much rather screw up the axle than the frame itself if it came down to it (though, I've never seen anyone do either?)

To the question at hand, though, I just don't think there's any need for anything stronger. I've done some silly, arguably abusive things on my skates and haven't ever tweaked one.
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Old January 29th, 2017, 02:52 PM   #6
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Default Aluminum

You want your axles to be of a material that is softer than your frames. If you had steel axles, for example, you would easily strip out the threads on the frame.

I don't know how much attention the new frame makers are paying attention to the frame/axle hardness differential but it is important.

But, if I were an axle manufacturer I guess I would make frames and axles of the same material. :-)
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Old January 29th, 2017, 08:24 PM   #7
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You want your axles to be of a material that is softer than your frames. If you had steel axles, for example, you would easily strip out the threads on the frame.

I don't know how much attention the new frame makers are paying attention to the frame/axle hardness differential but it is important.

But, if I were an axle manufacturer I guess I would make frames and axles of the same material. :-)
Bingo!! Having axles that are harder than the frame is of no use. The maximum strength of the system (axle+bearings+spacer+frame) is pretty much limited by the threads in the frame. The extra strength you gain by going to steel isn't worth the weight and defiantly not worth stripping out a frame. I would rather buy a new $5 axle than a $300 frame!
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Old January 30th, 2017, 12:24 AM   #8
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If it aint broke don't fix it...........axles last for years if you don't gorilla fist them when changing your wheels and use the correct sized allen key.
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Old January 30th, 2017, 06:46 PM   #9
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And it's different from Quad axles where the force tries to bend the axle since it's only attached at once side. Inline axles are supported at both sides (other than the funky one-sided frames), so the force transmitted through the bearings is applied immediately after the support from the frame. There's really no room for the axle to bend between the bearing and the frame, the worse that could happen would be a shearing effect, but I would imagine your wheels would collapse before you could transfer that amount of force to the bearings.

I've never seen a bent inline axle from a normal frame other than situations where the frame itself bent as well. And a stronger axle might have meant the axle didn't bend, but the frame would still have been toast.
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Old January 30th, 2017, 07:50 PM   #10
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Quote:
Originally Posted by jcardin View Post
That is my question. Are all speed skate one-piece axles made out of aluminum or are steel axles available also?

Seems odd to have skate axles in aluminum to begin with. Has anyone experienced problems with their use?
Once I was cruising at approx. 25 km/h in the night and didn't noticed a 15 cm barrier. Hit it with both front wheels. The feeling of head-forvard-flight and landing was unforgettable.
And you know what? Bont 6061 Alu frames and axels (AFAIR they do them from stronger 70xx alloy) didn't even notice. No markings, even no scratches.
Heat treated alu alloys are sturdy.
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Old February 2nd, 2017, 04:24 PM   #11
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Default This just in...

As I mentioned in earlier post, you want your axle metal softer than your frame metal.
Case in point- I have a brand new set of Pilot frames that came with my Luigino skates.
I needed to tweak the position. Two of the axles striped the threads on extraction. (I know there was no issue when I assembled skates) So, both the axle and the frame threads are damaged.

I contacted Josh at Atom Skates to tell of my plight. Josh was great and asked for size etc. He immediately sent me a new frame along with 2 new axles.

I tested all the axle fittings on new frame. AOK.

Thanks Josh!
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