Author Topic: Picco rim sprockets  (Read 797 times)

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Online srcarr52

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Re: Picco rim sprockets
« Reply #20 on: August 20, 2015, 10:52:09 am »
Tool post grinder on a lathe would work well. Carbide inserts don't like the case hardening of these "super hard" rims. Lol

I've cut down the OD of 8 pin .404 sprockets to make a lopro 8 pin standard spline before. Carbide doesn't like cutting them, but it will. I suppose shooting the holes for the splines was probably the worst on tooling.

Offline SquareFile

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Re: Picco rim sprockets
« Reply #21 on: August 20, 2015, 11:17:46 am »
Tool post grinder on a lathe would work well. Carbide inserts don't like the case hardening of these "super hard" rims. Lol

I've cut down the OD of 8 pin .404 sprockets to make a lopro 8 pin standard spline before. Carbide doesn't like cutting them, but it will. I suppose shooting the holes for the splines was probably the worst on tooling.



Yes it was. Carbide end mill didn't care for it much.

Online Philbert

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Re: Picco rim sprockets
« Reply #22 on: August 20, 2015, 12:14:51 pm »
Would some type of abrasive method work better than hard tooling on the rim sprockets?

Philbert

Offline aclarke

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Re: Picco rim sprockets
« Reply #23 on: August 20, 2015, 12:51:10 pm »
Would a ceramic cutter insert work on an interrupted cut or are they too brittle?

Offline HolmenTree

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Re: Picco rim sprockets
« Reply #24 on: August 20, 2015, 07:12:37 pm »
Don't  laugh...here's  my red neck thinking. Slide the power head on your work bench with no b/c at 1/2 throttle with the face of the rim contacting the face of a rotating bench grinder  wheel.
The grinder wheel and rim sprocket should be rotating into each other.
Periodically check rim diameter  :D

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Offline SquareFile

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Re: Picco rim sprockets
« Reply #25 on: August 20, 2015, 07:55:38 pm »
That would work on the o.d. but not the I.D. to increase hub size

Offline HolmenTree

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Re: Picco rim sprockets
« Reply #26 on: August 20, 2015, 09:05:03 pm »
No I was referring to turning down a .404 8T rim to the diameter of a P8 rim.
The .404 and Picco are a close fit. ;)
Making a living with a saw since age 16.

Offline Cut4fun .

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Re: Picco rim sprockets
« Reply #27 on: October 30, 2015, 10:55:43 pm »
I used to run alot of big Danzco pin rims years ago racing.  What I am wondering if a 6T to use with 3/8LP picco for smaller saws could be made in small or if it would interfere with the spline. By Danzco.

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Offline Cut4fun .

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Re: Picco rim sprockets
« Reply #28 on: September 25, 2016, 03:31:34 pm »
Just saving info on measurements.

posted by Trigger-Time long ago

Stihl Picco 7T rim.....1.433 dia = 4.502 circumference 
Reg. 3/8 7T rim 1.380 dia = 4.335 circumference

+0.167
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Offline HolmenTree

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Re: Picco rim sprockets
« Reply #29 on: September 25, 2016, 08:55:34 pm »
I used to run alot of big Danzco pin rims years ago racing.  What I am wondering if a 6T to use with 3/8LP picco for smaller saws could be made in small or if it would interfere with the spline. By Danzco.


I'm as guilty as one former member on here for not getting projects done haha.
See no reason for a 6 pin Picco Danzco rim being made for a small 7 spline. Probably never made because not enough call for it.
You could remove a 6T spur sprocket from its drum, enlarge the bore big enough and silver solder it onto a small spline drum.
Should work just fine as the Husky outboard clutched connection to the oil pump worm gear would still work fine.
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