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Author Topic: 3/8LP Picco rim sprocket  (Read 3749 times)

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Offline SquareFile

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Re: Picco rim sprockets
« Reply #10 on: August 19, 2015, 08:03:33 pm »
Quote from: Nathaniel Vansickle on August 19, 2015, 03:44:47 pm
Quote from: SquareFile on August 17, 2015, 11:00:17 am
Stihl picco rims are extremely hard. I can't modify them in a cost effective manner. I did notice Forester manufactures P-7 which I'm sure is softer.

seems to me i bought some of the "mini" spline forester rims once and they were small spline not the mini they were advertised as.

http://www.ebay.com/itm/Chain-saw-Rim-Sprocket-7-Tooth-3-8-Pitch-Mini-Spline-11-16-fits-Stihl-/131194464458?hash=item1e8bcca8ca
This is the only picture I've seen of a A.M. picco. Don't mean its correct but it looks like mini.
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Offline SquareFile

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Re: Picco rim sprockets
« Reply #11 on: August 19, 2015, 08:06:54 pm »
Quote from: Philbert on August 19, 2015, 02:11:12 pm

Mill?  Drill press? Hole saw? Rat-tail file? . . . . .

Inquiring minds want to know!



Philbert

Mazak integrex 400y. 5 axis lathe with live tooling.
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Offline SquareFile

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Re: Picco rim sprockets
« Reply #12 on: August 19, 2015, 08:10:52 pm »
My quotes are all screwed up.  ??? ;D
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Offline Cut4fun .

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Re: Picco rim sprockets
« Reply #13 on: August 19, 2015, 08:21:24 pm »
Quote from: SquareFile on August 19, 2015, 08:10:52 pm
My quotes are all screwed up.  ??? ;D

I tried to get what I think you were after. Close enough?
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Offline Philbert

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Re: Picco rim sprockets
« Reply #14 on: August 19, 2015, 09:21:29 pm »
Quote from: SquareFile on August 19, 2015, 08:06:54 pm
Mazak integrex 400y. 5 axis lathe with live tooling.
Bit more than I have.  I was hoping for a little time with a Dremel and a triangular file . . .

Could someone with a basic metalworking lathe bore out the ID, or would the tooling catch on the spline slots?
I am assuming that I could make the new spline slots with a file?

Philbert
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Offline HolmenTree

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Re: Picco rim sprockets
« Reply #15 on: August 19, 2015, 11:38:16 pm »
Years ago I dug out my Dremil kit one day and stuck a P8 mini 7 spline rim in my bench vise.
With lots of patience I was able to grind away the bore and splines with different size stones. Got it to fit my 346XP and it actually worked really well with no vibration  running the Picco chain.
But found in larger wood the gearing was too high for the 346, I never bothered resizing a P7 and left it at that.
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Offline aclarke

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Re: Picco rim sprockets
« Reply #16 on: August 20, 2015, 12:24:55 am »
Cheapo lathe and a tool post grinder does just fine on those "super hard" sprockets.   Lol!!!
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Offline aclarke

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Re: Picco rim sprockets
« Reply #17 on: August 20, 2015, 12:30:19 am »
Why would Forester sprockets be softer?
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Offline SquareFile

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Re: Picco rim sprockets
« Reply #18 on: August 20, 2015, 05:14:13 am »
My experience with forester sprockets is they wear faster.

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Offline SquareFile

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Re: Picco rim sprockets
« Reply #19 on: August 20, 2015, 05:55:14 am »
Tool post grinder on a lathe would work well. Carbide inserts don't like the case hardening of these "super hard" rims. Lol
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