Author Topic: Alpina 120 sprocket?  (Read 183 times)

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Offline fiddlin logger

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Alpina 120 sprocket?
« on: April 16, 2019, 05:09:14 am »
hi i'm a newbie the folk at the forestry forum sent me here

dont know if this is the right place to post this

Any hope for finding a sprocket (.404)for my old Alpina 120? it only does occasional milling, but does it well.

...or maybe there is a hack/mod that can let me use another sprocket? as you can tell i'm no expert and any help would be much appreciated

...i know i should shelve it but it still runs well... other than the sprocket is on its last legs

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Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #1 on: April 16, 2019, 07:58:04 am »
Welcome.   

Hopefully someone has some info for that model.

Cool looking ole saw.

Now these guys at chainsaw collectors might be the ones to be able to locate that part.  http://www.chainsawcollectors.se/phpbb3/index.php?sid=c2cd102f5201bad43e555f2004a7abb3

120 and Sven his here too. Might try and PM him.  http://www.chainsawcollectors.se/phpbb3/viewtopic.php?f=121&t=8400

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Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #2 on: April 16, 2019, 08:06:01 am »
Alpina 120 IPL  https://www.lagros.com/pdf/Alpina_P120S.pdf

does that IPL look right?  I dont know the saw.

120, P120S
4120460
.404
7 79.5 19 Ring sprocket
4120460
12.5 needle roller bearings
3114040
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Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #3 on: April 16, 2019, 08:15:27 am »
This guy is selling the style drum that takes the rim. You could run 404 or whatever then to match the bar. Shows he has 9 left.   oregon 20091
https://www.ebay.com/itm/oregon-20091-alpina-70-p-120-p120-chainsaw-sprocket/192749043473?hash=item2ce0bcff11:g:oXQAAOSwQzJb3GrV:sc:USPSPriority!44833!US!-1
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Offline fiddlin logger

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Re: Alpina 120 sprocket?
« Reply #4 on: April 16, 2019, 09:36:09 am »
Hey thanks for the info! and the reply, i've seen that ebay listing but i didn't realize that i could run a .404 rim on that clutch drum!!  i thought i would have to get an equivalent spur sprocket (that's how much i know ).That'll keep the old saw running till i cant lift it anymore  :)

Thanks again

Ps: sorry i dont know what "IPL" is,  but the PDF  parts list  and diagram looks ok, apart from my saw has 6 clutch fingers that throw out into the drum rather than the 2 that are in the drawings (part 250 in the drawing)
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Offline fiddlin logger

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Re: Alpina 120 sprocket?
« Reply #5 on: April 16, 2019, 02:28:48 pm »
Well i pulled the trigger on one of those clutch drums and a couple of .404, 7 tooth  Oregon PowerMate sprocket rims. For the amount of work this saw does it should see me out... if they fit.........Here's hoping....Will keep you informed.
 
Either way, thanks again for your help, Pete

PS: thanks for posting my pic from the forestry forum, i tried to post it here but failed...
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Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #6 on: April 16, 2019, 03:40:43 pm »
Cool hope it works out.

I pay out of my pocket for picture  space so I keep them small KB size. So most dont know how to resize to fit.
I dont do this for making money like FF OPE AS etc. Plus I dont want paying flashing sponsor stuff every where like those other sites have.

Let us know if it worked ot not and thanks for the other info.
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Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #7 on: April 16, 2019, 03:43:48 pm »
@Sven Johnson  shows owning a 120 on CSCC so maybe he can share some info
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Offline fiddlin logger

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Re: Alpina 120 sprocket?
« Reply #8 on: April 17, 2019, 06:17:33 am »
Just thought.... if this sprocket thing works out i can use a 3/8" chain and a smaller bar and adjust the milling attachment down to say 28"-36" to mill smaller stuff, it would be a lot easier to handle on my own as well. And just use the .404 and 42" bar when i need to...Probably easier on the old saw as well. Suppose i would just have to watch out that i don't snap the 3/8" chain... Could that happen??...(getting ahead of myself here)

Apologies for getting off topic...

Offline Cut4fun .

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Re: Alpina 120 sprocket?
« Reply #9 on: April 17, 2019, 07:06:51 am »
I dont see the problem of milling with 3/8 at all. Most I know use 3/8 and not 404 milling.

@mdavlee .   milled maybe he can tell you more.
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