Author Topic: 3/8LP Picco rim sprocket  (Read 3064 times)

0 Members and 40 Guests are viewing this topic.

Offline SquareFile

  • 5 cube
  • ***
  • Posts: 146
  • Karma: 32

  • Total Badges: 29
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Picco rim sprockets
« Reply #10 on: August 19, 2015, 08:03:33 pm »
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.

Offline SquareFile

  • 5 cube
  • ***
  • Posts: 146
  • Karma: 32

  • Total Badges: 29
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Picco rim sprockets
« Reply #11 on: August 19, 2015, 08:06:54 pm »

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

Inquiring minds want to know!



Philbert

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

Offline SquareFile

  • 5 cube
  • ***
  • Posts: 146
  • Karma: 32

  • Total Badges: 29
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Picco rim sprockets
« Reply #12 on: August 19, 2015, 08:10:52 pm »
My quotes are all screwed up.  ??? ;D

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts
Re: Picco rim sprockets
« Reply #13 on: August 19, 2015, 08:21:24 pm »
My quotes are all screwed up.  ??? ;D

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

Offline Philbert

  • Gas Hotsaw
  • ******
  • Posts: 563
  • Karma: 76

  • Total Badges: 23
    Badges: (View All)
    Seventh year Anniversary Sixth year Anniversary Level 5 Fifth year Anniversary 500 Posts Fourth year Anniversary
Re: Picco rim sprockets
« Reply #14 on: August 19, 2015, 09:21:29 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

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 1382
  • Karma: 199
  • Location: Manitoba Canada

  • Total Badges: 34
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Level 6 1000 Posts Seventh year Anniversary
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.
Making a living with a saw since age 16.

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

  • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
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!!!

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

  • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: Picco rim sprockets
« Reply #17 on: August 20, 2015, 12:30:19 am »
Why would Forester sprockets be softer?

Offline SquareFile

  • 5 cube
  • ***
  • Posts: 146
  • Karma: 32

  • Total Badges: 29
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Picco rim sprockets
« Reply #18 on: August 20, 2015, 05:14:13 am »
My experience with forester sprockets is they wear faster.


Offline SquareFile

  • 5 cube
  • ***
  • Posts: 146
  • Karma: 32

  • Total Badges: 29
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
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

 

Related Topics

  Subject / Started by Replies Last post
185 Replies
13003 Views
Last post November 06, 2016, 12:22:58 pm
by HolmenTree
0 Replies
341 Views
Last post July 28, 2011, 01:27:28 pm
by mweba
2 Replies
538 Views
Last post September 29, 2011, 09:50:53 pm
by Cut4fun
11 Replies
2212 Views
Last post July 13, 2015, 03:26:16 am
by fisaw
19 Replies
1224 Views
Last post March 22, 2015, 07:54:43 pm
by jmester
5 Replies
919 Views
Last post June 18, 2015, 12:34:28 pm
by Cut4fun .
5 Replies
730 Views
Last post December 14, 2015, 04:59:13 am
by The Ripper
22 Replies
1177 Views
Last post December 26, 2015, 09:04:59 pm
by jmester
8 Replies
547 Views
Last post January 07, 2016, 08:08:04 pm
by 3000 FPS
2 Replies
340 Views
Last post June 03, 2018, 05:29:02 pm
by Cut4fun .