Author Topic: Random bar, chain and sprocket development  (Read 343 times)

concretegrazer and 0 Guests are viewing this topic.

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 870
  • Karma: 82
  • Location: Manitoba Canada
Random bar, chain and sprocket development
« on: October 21, 2016, 06:45:28 pm »
Thought I'd post some random interesting and informative stuff from the industry over the decades.

Found this from the mid 1970's . Oregon explaining Low-Profile is their trademark.

Walt Galer from Windsor debating the benefits of spur sprockets over rim sprockets.

Making a living with a saw since age 16.

Social Buttons

Like Like x 2 View List

Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2585
  • Karma: 134
Re: Random bar, chain and sprocket development
« Reply #1 on: October 22, 2016, 04:23:56 am »
Interesting .I noticed the ad for bar guards with advertising I have several myself .Some how I have never started a saw up and forgotten to remove those prior .Some of the others,plastic I have .They don't do so well with a running chain inside of them . ;)

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 18266
  • Karma: 346
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Random bar, chain and sprocket development
« Reply #2 on: October 22, 2016, 10:34:07 am »
If I remember right Dennis Cahoon preferred the big racing spurs over the big pin racing rims.  He said why but my memory is foggy on it.
REDNECK Saw Repair Getter Done

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 870
  • Karma: 82
  • Location: Manitoba Canada
Re: Random bar, chain and sprocket development
« Reply #3 on: October 22, 2016, 10:54:50 pm »
I have a beautiful Ohio made 11T spur on my Yamaha bikesaw. It's 33 years old and still not a chain wear mark on it.

I'll post more tomorrow guys, just finished a 12 hour day taking out trees between 2 cabins.
Making a living with a saw since age 16.
Like Like x 1 View List

Offline mdavlee .

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 1858
  • Karma: 162
Re: Random bar, chain and sprocket development
« Reply #4 on: October 23, 2016, 07:45:59 am »
I think it beat up the chain less or let it move more freely that the rim drive.

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 870
  • Karma: 82
  • Location: Manitoba Canada
Re: Random bar, chain and sprocket development
« Reply #5 on: October 25, 2016, 05:45:56 pm »
Some development history here on rim sprockets. From what I can find Oregon didn't introduce the Powermate rim sprocket until 1967-68.
McCulloch sold  a rim as far back as 1964 but it was solid to the drum. But in 1964 Armstrong introduced a floating spline drum rim sprocket.

So I'm thinking Armstrong was supplying McCullough the rims since they started in the sprocket business in 1959.
But nothing on information about Armstrong after Oregon introduced the PowerMate rim a few years later.

Oregon was know to have been involved in many patent wars but I'm thinking they may have just bought Armstrong out.



Making a living with a saw since age 16.
Like Like x 1 View List

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 18266
  • Karma: 346
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Random bar, chain and sprocket development
« Reply #6 on: October 25, 2016, 06:47:38 pm »
Very neat stuff to read with pics.  8)

Please keep it coming.  8)
REDNECK Saw Repair Getter Done

Offline Eccentric

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2037
  • Karma: 199
  • Magnesium and Iron.
  • Location: Northern California.
Re: Random bar, chain and sprocket development
« Reply #7 on: October 26, 2016, 03:42:18 pm »
I have an NOS Armstrong rim drive drum with the tiger on the box.  Need to remember to snap a pic...
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.
Useful Useful x 1 View List

Offline fisaw

  • 4 cube
  • **
  • Posts: 74
  • Karma: 21
  • Location: Finland
Re: Random bar, chain and sprocket development
« Reply #8 on: October 29, 2016, 03:19:56 am »
Interesting , thanks

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 870
  • Karma: 82
  • Location: Manitoba Canada
Re: Random bar, chain and sprocket development
« Reply #9 on: November 06, 2016, 12:47:41 pm »
Well guys I was up till 4 in the morning last night researching.
I came up with how to get a Stihl Picco 7 pin mini 7 spline rim sprocket  on a 029/MS290, 039/MS390, MS310.
And the 034/MS341, 036/MS361,.....with Stihl OEM parts.

Stihl sprocket kit (3/8 7T) 1125 007 1002
The rim included is standard 3/8 but still mini 7 spline.
Another # is 1125 007 1001 (.325-7T).

Bearing #9512 933 2260.

I only found these kits on U. K. E-Bay. Appears in Europe they  didn't do what we did here in North America....upgrading all the 034, 036 etc. to the preferred standard 7 spline sprocket drums.

Reason I figure is in the North American market the standard 3/8 chain with longer bars was blowing out too many mini 7 drum bearings.
So Stihl went with the standard 7 spline rims and drums, part#1125 007 1041. Bearing # 9512 933 2380 (same bearing as 044AV).

So there you go start putting those 63PS chains and 7T mini rims on the MS341,361 and 290,390 series saws.

Don't worry about blowing the small bearings with the narrow kerf PS63.
Making a living with a saw since age 16.

 

Related Topics

  Subject / Started by Replies Last post
2 Replies
159 Views
Last post September 29, 2011, 09:50:53 pm
by Cut4fun
1 Replies
149 Views
Last post November 07, 2012, 10:27:43 pm
by Roanoker494
2 Replies
139 Views
Last post April 16, 2014, 06:44:18 pm
by winland
4 Replies
52 Views
Last post June 19, 2014, 01:06:44 am
by 660magnum
5 Replies
122 Views
Last post January 16, 2015, 12:24:06 pm
by farmboy
19 Replies
172 Views
Last post March 22, 2015, 07:54:43 pm
by jmester
5 Replies
137 Views
Last post June 18, 2015, 12:34:28 pm
by Cut4fun .
6 Replies
337 Views
Last post July 08, 2016, 10:26:49 am
by Cut4fun .
3 Replies
188 Views
Last post November 26, 2016, 02:24:19 pm
by weimedog
0 Replies
35 Views
Last post September 19, 2016, 01:08:44 pm
by Cut4fun .