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Old 06-15-2017, 07:18 AM
nwerring nwerring is offline
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Default Snow Trac Variator part ST25. New production.

I had a batch of ST25 variator parts made here in Norway. They came out very nice. I have 10 left for sale. You might be able to get them cheeper in the US, but the production cost in Norway was not very nice...
$400.-USD.
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Old 06-15-2017, 11:33 AM
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Default Re: Snow Trac Variator part ST25. New production.

Those look very well made.
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Old 06-15-2017, 12:01 PM
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Default Re: Snow Trac Variator part ST25. New production.

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Originally Posted by PJL View Post
Those look very well made.
I used a new unused original as pattern. 3D scan. Should be an excact copy. Only thing that came out wrong was the ST25 number. Mine are stamped ZT25 for some reason. I could have gotten the work done in China or India, but I wanted as good a quality as I could get, so got them made here at home. This made them more expencive though...
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Old 06-15-2017, 09:03 PM
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Question Re: Snow Trac Variator part ST25. New production.

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Originally Posted by nwerring View Post
I used a new unused original as pattern. 3D scan. Should be an excact copy. Only thing that came out wrong was the ST25 number. Mine are stamped ZT25 for some reason. I could have gotten the work done in China or India, but I wanted as good a quality as I could get, so got them made here at home. This made them more expencive though...
Was the shrinkage of the cast aluminum taken into account by making the mold slightly larger than the original part or are the copies slightly smaller that the original?
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Old 06-15-2017, 09:05 PM
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Default Re: Snow Trac Variator part ST25. New production.

Ever consider using ductile iron? We have made some cleats from this and the material will not crack normally (some tie rods are made of this ) you can even have it aus tempered for a near indestructible part.
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Last edited by MNoutdoors; 06-15-2017 at 09:08 PM. Reason: Spelling
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Old 06-15-2017, 09:24 PM
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Default Re: Snow Trac Variator part ST25. New production.

Short little video on aluminum VS Ductile breaking properties not super scientific
But to the point


https://m.youtube.com/watch?v=FE8tNswWng0
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Old 06-15-2017, 10:26 PM
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Default Re: Snow Trac Variator part ST25. New production.

From previous discussions here, the consensus was it was designed to be the part that broke first. I'm not certain if that is true, but if you start twisting the wheel with nothing turning, something is going to give.
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Old 06-16-2017, 05:13 AM
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Default Re: Snow Trac Variator part ST25. New production.

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Originally Posted by teledawg View Post
Was the shrinkage of the cast aluminum taken into account by making the mold slightly larger than the original part or are the copies slightly smaller that the original?
I'm pretty sure the company that made them took the shrinkage into account. When I test mounted it on it's mounting cradle (..dont remember this part number..) it fit nice and tight just like the original. Only thing I notice is one extra hole. They obviously missed that one of the holes to be drilled out should only be on the front - not through to the back.
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Old 06-16-2017, 08:47 AM
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Default Re: Snow Trac Variator part ST25. New production.

I use to carry my spare. now it stored in my barn. they will drive straight with it broke.
if properly operated it is hard to break one.
jim
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