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  #161  
Old 01-26-2016, 09:01 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

it may only be 8 mph in the 2100 but those j grousers are like ice skates when on ice. its not Vin Diesel, its Ford Dorset diesel
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  #162  
Old 02-22-2016, 02:36 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Any news on the WA sprocket process?

the WI process is under way.

I will be pulling a copy sprocket soon. Ill post here if I have success.
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  #163  
Old 02-22-2016, 04:58 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

My foundry has both patterns and is going to make one of each. Am expecting to hear from him any day. They have been very busy, so it has taken longer than expected.
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  #164  
Old 02-24-2016, 12:39 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Copy ST 30A sprocket was pulled Monday.

pattern maker corrected it for shrinkage in both the tabs and ears Tuesday.

Just got a call that 5 will be poured today.
Five more on Monday.

(these are the TWO BAND Sprockets)

if you in a bind send me a note. Ever since the Dairy queen run, My poly sprockets are skipping steady now on the right side. I could not wait. I need to use the machine to pull Ice houses off the lake.

Sturgeon spearing ends Sunday, fish houses have to be pulled off before 3/2

I got one yesterday, our warm weather and warm water temps are eating the ice from both sides.
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  #165  
Old 02-24-2016, 01:35 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

So what did this years fish weigh?

Glad you got those sprockets getting poured. Just remember where you got the one you made the pattern from!!

Can't wait to see how they turn out.

Regards, Kirk
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  #166  
Old 03-03-2016, 10:29 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Finally got a sample of both sprockets cast. They turned out good.
Have a picture but could not figure out how to post it here.
Anyone interested in a set can PM me and I can email the picture
and we can go from there.

Thanks
John
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  #167  
Old 03-28-2017, 09:59 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

300 H&H had posted dimensions previously for sprockets. Neils sent me an STP file which I could open with Wedge, but without having a compatible version of AutoCAD I couldn't dimension.

The dimensions that were posted in this thread were slightly incorrect, so I am trying to correct per layout. I am going to try and make a weekend trip to verify. Three hour drive and couple mile hike in to cabin. The dimensions below are what I have come up with so far. Please feel free to correct me if I am off base.

Outer Tooth Diameter - 17-1/4" (17.25")
Outer Tooth Radius - 8-5/8" (8.625")

Base Diameter - 15-3/8" (15.375")
Base Radius - 7-11/16" (7.6875")

Tooth Degrees - 90*, 77.1428571*, 51.4285714*, 25.7142857

Circle Circumference - 54.19247"
Tooth Center to Tooth Center - 3-7/8" minus (3.8708")(14 Teeth)
Tooth Tip Width - 1" (Need to Verify)
Space at Base - 1-1/2" (Need to Verify, May need to be 2" for grouser which would take out slope)

Thickness - 1/2" to 1" UHMW depending on model.

Hope this is helpful. I have an older two band model. I would like to start out with 1/2" and see if it is durable enough before I modify my sprocket to fit thicker UHMW. Prices of UHMW vary depending on location. I purchased a piece of 18" x 10' for $350 in Anchorage, Alaska. You may be able to find cheaper in the Lower 48.

Thanks,
Joe

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  #168  
Old 04-03-2017, 04:39 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Dimensions will need to be modified from what was posted -

Tooth Width - 3/4"
Tooth Space at lower radius - 1-7/8"
Mounting Hole radius - 5-7/8"
Mounting Hole Size - 1/2" for 3/8" bolt
Inner Hole Radius - 5-1/8" (10-1/4" Diameter)

Will update picture of template when finished modifying for new dimensions.

Thanks for your patience,
Joe
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  #169  
Old 06-21-2017, 11:15 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Quote:
Originally Posted by Bombi1 View Post
Finally got a sample of both sprockets cast. They turned out good.
Have a picture but could not figure out how to post it here.
Anyone interested in a set can PM me and I can email the picture
and we can go from there.

Thanks
John
Back on the trail of sprockets. Are these a send check, get sprocket item or still a one-by-one prototype?

Or who has >right now< st50/52 3 band sprockets for sale or short turn around time.

CT
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  #170  
Old 06-29-2017, 10:06 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

bump.
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  #171  
Old 06-30-2017, 03:01 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

PM sent
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  #172  
Old 09-13-2017, 11:50 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

New sprockets arrived to replace the slightly worn ones.

It appears the previous owner(s) never flipped them.

Thank you Bombi1
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  #173  
Old 09-14-2017, 08:29 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Holy cow. Actually seeing a new one of those has been a long time coming.
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  #174  
Old 09-14-2017, 08:56 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Yes it has. Some are being made out of UHMW plastic as well. They probably will not last as long, but will be quiet and easy on the grousers in the track.

Regards, Kirk
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  #175  
Old 09-14-2017, 09:48 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

I really thought about using UHMW plastic. If I had the older type, I probably would have gone that way. I just didn't like the long unsupported spokes of the ST52. Thought about doing a hybrid, metal core and using the older style for the drive part. Then thought my time would be better spent drinking beer, and not re-inventing the drive wheel.
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  #176  
Old 09-14-2017, 10:54 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

The bolt pattern very on the st4 and I'm curious if you need to redrill them.
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  #177  
Old 09-14-2017, 11:36 AM
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Default Re: Snow Trac replacement BRONZE drive sprockets

They have no holes as yet. Going to clamp the old to new and bore them.
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  #178  
Old 09-14-2017, 02:58 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Are the ST-30a two band being produced. I have two machines and would put UHMP on one and bronze on other for a test. Either way I need them.

Doug
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  #179  
Old 09-14-2017, 04:31 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

send a PM to bombi1, but he may be slow to respond due to mother nature.
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  #180  
Old 09-22-2017, 10:45 PM
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Default Re: Snow Trac replacement BRONZE drive sprockets

Got time to drill and mount the new sprockets. They are thicker than the old ones. Not enough to be an issue though. But the nylocks barely have enough stud. Going to go through the mounts this weekend and check bearings etc.
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