Forums Forums - Off Topic Forum FUN





Go Back   Forums Forums - Off Topic Forum FUN > Snow Trac ST4, Kristi, Thiokol/LMC, Tucker, Bombardier & Other Snowcat Discussions > Snowcat Repairs, Parts & Problems Forum

Snowcat Repairs, Parts & Problems Forum Snowcat Repairs, Parts Inquiries, Sources, Problems & Advice

Reply
 
Thread Tools Display Modes
  #41  
Old 03-07-2015, 07:40 PM
alpinenut's Avatar
alpinenut alpinenut is offline
Junior Member
 
Join Date: Sep 2008
Posts: 4
Thanks: 0
Thanked 4 Times in 1 Post
alpinenut is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

The replacement bronze sprockets by J&T Foundry in North Pole were cast from Silicon Bronze, Alloy CDA 873 Everdur, with composition
Copper 95%
Silicon 4%
Manganese 1%
Reply With Quote
The Following 4 Users Say Thank You to alpinenut For This Useful Post:
300 H and H (03-08-2015), 3512b (03-08-2015), mbsieg (03-07-2015), nikos (03-08-2015)
  #42  
Old 03-07-2015, 08:18 PM
teledawg's Avatar
teledawg teledawg is offline
Bronze Member
 
Join Date: Apr 2007
Location: Gold Cord Mine, Alaska
Posts: 341
Thanks: 1
Thanked 29 Times in 16 Posts
teledawg is on a distinguished road
Thumbs up Re: Snow Trac replacement BRONZE drive sprockets

I have a set of 4 NOS ST30A drive sprockets for 2 band machines that would be good candidates to use for making a drawing or pattern from.
__________________
1968 Trac Master ST4B #0922
Reply With Quote
  #43  
Old 03-07-2015, 09:10 PM
JimVT's Avatar
JimVT JimVT is offline
Bronze Member
 
Join Date: Oct 2005
Location: Enumclaw WA.
Posts: 3,107
Thanks: 3
Thanked 750 Times in 409 Posts
JimVT is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

4 heavy brass and a stock.

__________________
Jim KF7RiN
#185 snow trac
2004 pistenbully canyon
Reply With Quote
The Following User Says Thank You to JimVT For This Useful Post:
300 H and H (03-08-2015)
  #44  
Old 03-09-2015, 05:26 PM
sitting-bull sitting-bull is offline
Junior Member
 
Join Date: May 2009
Posts: 13
Thanks: 0
Thanked 4 Times in 2 Posts
sitting-bull is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

hallo what is the price for a set for 2 bands trac ?
Reply With Quote
  #45  
Old 03-09-2015, 05:38 PM
JimVT's Avatar
JimVT JimVT is offline
Bronze Member
 
Join Date: Oct 2005
Location: Enumclaw WA.
Posts: 3,107
Thanks: 3
Thanked 750 Times in 409 Posts
JimVT is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I got mine for $200 each but was told they shut down.
__________________
Jim KF7RiN
#185 snow trac
2004 pistenbully canyon
Reply With Quote
  #46  
Old 04-06-2015, 07:31 PM
couchloafer's Avatar
couchloafer couchloafer is offline
Bronze Member
 
Join Date: Feb 2006
Location: North Idaho
Posts: 717
Thanks: 0
Thanked 7 Times in 3 Posts
couchloafer is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I have a set of molds for the 3 or 5 band I got from Bob Canton that can easily be modified for the 2 band. If anyone is interested I can get a price from the local foundry.........
Reply With Quote
The Following User Says Thank You to couchloafer For This Useful Post:
Sno-Surfer (06-05-2015)
  #47  
Old 04-07-2015, 10:40 AM
redsqwrl's Avatar
redsqwrl redsqwrl is offline
Bronze Member
 
Join Date: Feb 2011
Location: E central WI
Posts: 1,534
Thanks: 287
Thanked 547 Times in 275 Posts
redsqwrl is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

this is good news.

any one have a three band and two band sprocket to compare?
Reply With Quote
  #48  
Old 04-07-2015, 12:29 PM
Snowtrac Nome's Avatar
Snowtrac Nome Snowtrac Nome is offline
member formerly known as dds
 
Join Date: Aug 2009
Location: NOME AK
Posts: 9,316
Thanks: 14
Thanked 811 Times in 548 Posts
Snowtrac Nome is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

what needs to be done to modify the sprockets for 2 band the 3 band sprockets look a lot more robust
__________________
Don
1962 st-4
KL2ZF
Snow trac's Rule and Krustys Drool
Reply With Quote
  #49  
Old 04-07-2015, 01:34 PM
300 H and H's Avatar
300 H and H 300 H and H is online now
Bronze Member
 
Join Date: Jan 2010
Location: Iowa
Posts: 5,805
Thanks: 1,791
Thanked 999 Times in 557 Posts
300 H and H will become famous soon enough
Default Re: Snow Trac replacement BRONZE drive sprockets

Quote:
Originally Posted by redsqwrl View Post
this is good news.

any one have a three band and two band sprocket to compare?
When you were here last week, I should have given you a new unused Noth Poll cast one.

We forgot...

Regards, Kirk
__________________
Snow trac ST4 #267
Reply With Quote
  #50  
Old 04-07-2015, 04:59 PM
mbsieg's Avatar
mbsieg mbsieg is online now
awful member
 
Join Date: Oct 2006
Location: Worland WY
Posts: 3,143
Thanks: 135
Thanked 114 Times in 84 Posts
mbsieg is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I have some like new 3 band North pole ak sprockets
__________________
what a day........
Reply With Quote
  #51  
Old 04-08-2015, 09:25 AM
redsqwrl's Avatar
redsqwrl redsqwrl is offline
Bronze Member
 
Join Date: Feb 2011
Location: E central WI
Posts: 1,534
Thanks: 287
Thanked 547 Times in 275 Posts
redsqwrl is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

Quote:
Originally Posted by 300 H and H View Post
When you were here last week, I should have given you a new unused Noth Poll cast one.

We forgot...

Regards, Kirk
I gotta believe if i was solo I would have remembered.

Oh well, the tour was fascinating.
Reply With Quote
  #52  
Old 04-13-2015, 01:39 PM
couchloafer's Avatar
couchloafer couchloafer is offline
Bronze Member
 
Join Date: Feb 2006
Location: North Idaho
Posts: 717
Thanks: 0
Thanked 7 Times in 3 Posts
couchloafer is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I have both two and three band to compare to. These are the thicker ones.
Attached Images
  
Reply With Quote
  #53  
Old 04-13-2015, 02:46 PM
redsqwrl's Avatar
redsqwrl redsqwrl is offline
Bronze Member
 
Join Date: Feb 2011
Location: E central WI
Posts: 1,534
Thanks: 287
Thanked 547 Times in 275 Posts
redsqwrl is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

Alright my ignorance and inexperience is going to come shining through....

in post 43 Jims sprockets look to be wide or chamfered where they meet the rubber drum.

Kevins CPST52 sprockets look flat as compared to the red one standing there.

I assume the little knobs are for alignment.

the three band sprockets look to be quite flat as well.

Question here:

Does the 3 band sprocket fit on the two band machines?

Does the rubber coated hub meet up with that raised area?

Does it need to.

I assumed the rubber drum with the spiral flute running through it was some sort of an attempt to create an ice breaker.

Basically, are we just confused on a higher level or are we making progress.
Reply With Quote
  #54  
Old 04-13-2015, 03:50 PM
JimVT's Avatar
JimVT JimVT is offline
Bronze Member
 
Join Date: Oct 2005
Location: Enumclaw WA.
Posts: 3,107
Thanks: 3
Thanked 750 Times in 409 Posts
JimVT is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

on the st4 two band the rubber drum in the center it held by clamping the two sprockets together and centered by the tabs on the sprockets
the center rubber is like an ice breaker but isn't very efficient at times. later a ice scraper was put on to keep it clear.
__________________
Jim KF7RiN
#185 snow trac
2004 pistenbully canyon
Reply With Quote
  #55  
Old 04-15-2015, 11:59 AM
jask jask is offline
Bronze Member
 
Join Date: Jan 2014
Location: Kamloops B.C.
Posts: 338
Thanks: 23
Thanked 91 Times in 61 Posts
jask is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I am adding ice scrapers to my early machine ( ST193 - 1961 ) I have seen a few now where the internal drum section was cracked and repaired - obviously from ice building up..
I would also recommend having some work done on the assembly whenever you rebuild these- I have seen a few ( one that might be a low mile original unit ) that have a spot of brazing added on each of the inside face locating tabs where they touch the drum. This extra stiffening supports and protects that drum. and every one I have seen with cracked and repaired drums did not have this- I am speculating that the unsupported flexing of unwelded units, or uneven loading from ice buildup causes more stress ( and cracking ) than they were originally engineered for.
Considering the intended use and very long service life of most of these machines I am really impressed that there are so many still out there, and in as good of condition as they are.
Reply With Quote
  #56  
Old 04-28-2015, 01:35 PM
Sno-Surfer's Avatar
Sno-Surfer Sno-Surfer is offline
Bronze Member
 
Join Date: Oct 2012
Location: Hood River, OR
Posts: 613
Thanks: 1,324
Thanked 971 Times in 233 Posts
Sno-Surfer is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

I am also looking for a set of the bronze gears for the two band track. Lyndon pointed out that mine are hard steel and they will eat up my grousers.

If anyone has a set or a lead, let me know. Thank you.
Reply With Quote
  #57  
Old 06-05-2015, 01:17 AM
Snowcat Operations's Avatar
Snowcat Operations Snowcat Operations is offline
Gold Member
 
Join Date: Dec 2005
Location: NEVADA
Posts: 7,806
Thanks: 32
Thanked 87 Times in 41 Posts
Snowcat Operations is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

Im looking for a set of the older style sprockets. Anyone making them these days or have some NOS ones?
__________________
EVIL prevails when good men stand aside.
Reply With Quote
  #58  
Old 06-10-2015, 06:33 PM
redsqwrl's Avatar
redsqwrl redsqwrl is offline
Bronze Member
 
Join Date: Feb 2011
Location: E central WI
Posts: 1,534
Thanks: 287
Thanked 547 Times in 275 Posts
redsqwrl is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

OK, today was the day I went on a goose chase to follow some leads on patterns and casting the sprockets.

What I know patterns:
I can have a pattern on Match board, with Shift locks, created from my used ST-30A sprocket and a supplied, dimensioned drawing. If I want it 4 weeks it will be approx. $1600... If it is prepared as fill in work $1000.
He is willing to prepare the molds and sell the sprockets. on his dime.
He is willing to build a plug Mold, corrected for shrinkage. Labor to cast this way is prohibitive.
Casting:
Union Brass and aluminum foundry, will hand cast four sprockets off of my used sprocket corrected for shrinkage and built up to Approximate OEM dimensions.( his Time and material estimate) at least $500 for molding plus $3.00 per pound for material (which he has in stock) I did not weigh my sprockets but the per lb price seems fair. this price is market driven...

cope and Drag Mold Is still time and material, but the hand molding process is non-existant. This is the $1600 mold that would be good for quite a while.

Summary:

I am going to go to another pattern maker tomorrow and price check the pattern maker quoted above.
we have three foundrys that will and can do this work.
we have at least six pattern shops within an hour.

What are your thoughts,...
Who else has an iron in the fire....

I am guessing that 12-16 sprockets would get sold quite fast based on the chatter here.
Reply With Quote
  #59  
Old 06-13-2015, 09:44 PM
redsqwrl's Avatar
redsqwrl redsqwrl is offline
Bronze Member
 
Join Date: Feb 2011
Location: E central WI
Posts: 1,534
Thanks: 287
Thanked 547 Times in 275 Posts
redsqwrl is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

Went to the second and third pattern maker Friday.. NOt good news.

$2000 for a loose mold. from A.H. patterns.

$3500 for a loose mold. From Prime patterns.

Both cheaper if i Can source a dimensioned drawing. I am going to bump this a few times before I contact the first pattern maker who is willing to do the cope and drag method for $1600

Basically if my math is correct the cost will be the roughly the same as J&T sprockets plus shipping except the sprockets will be full size not 25% shrunk.

Hopfully I can get some feedback sooner than later. as lead time is key to getting this rolling before any one is in a bind for this coming winter.

mIke
Reply With Quote
  #60  
Old 06-13-2015, 10:40 PM
MNoutdoors's Avatar
MNoutdoors MNoutdoors is offline
Tracked Evolution Central
 
Join Date: Jan 2007
Location: AK.,AZ.,CA.,MN.,MT. Home of all the villes
Posts: 3,135
Thanks: 6
Thanked 581 Times in 309 Posts
MNoutdoors is on a distinguished road
Default Re: Snow Trac replacement BRONZE drive sprockets

Well I've run into a dead end up at the North Pole AK. But another member here was going to check with another foundry in the Northwest but have not heard anything from him in awhile. We certainly could do the drawing if we had a new one. We also could machine one from a blank of material but do not think it would be cost effective because so much of the blank would turn into chips.
__________________
Have a nice day, NSA kind of like NASA but one less "A"
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Snow Trac TOYS Melensdad Snowcat History, Articles, Manuals, Brochures & Recollections Forum 43 01-19-2013 11:27 PM
looking for a Snow trac! Tommo Snowcat Adventure & Usage Forum 22 02-12-2006 01:38 AM
SNOW TRAC -Polish Website Translated to English (sort of) Melensdad Snowcat History, Articles, Manuals, Brochures & Recollections Forum 0 01-20-2006 05:55 PM
schmidt's Snow Trac at MOUNTAIN HOME LODGE Melensdad Snowcat Restoration & Modification Projects Forum 6 01-10-2006 02:56 PM







All times are GMT -4. The time now is 02:18 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © 2002 - 2017 www.ForumsForums.com