Chainsaw Repair

Chain - Grinders - Filing - Wood Milling - Tools - Welding - Machinist - Mowers - Tillers => Chain - Bars - Grinders - Filing => Topic started by: HolmenTree on October 21, 2016, 06:45:28 pm

Title: Random bar, chain and sprocket development
Post by: HolmenTree 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.

Title: Re: Random bar, chain and sprocket development
Post by: Al Smith 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 . ;)
Title: Re: Random bar, chain and sprocket development
Post by: Cut4fun . 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.
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree 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.
Title: Re: Random bar, chain and sprocket development
Post by: mdavlee . 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.
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree 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.



Title: Re: Random bar, chain and sprocket development
Post by: Cut4fun . on October 25, 2016, 06:47:38 pm
Very neat stuff to read with pics.  8)

Please keep it coming.  8)
Title: Re: Random bar, chain and sprocket development
Post by: Eccentric 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...
Title: Re: Random bar, chain and sprocket development
Post by: fisaw on October 29, 2016, 03:19:56 am
Interesting , thanks
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree 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.
Title: Re: Random bar, chain and sprocket development
Post by: Cut4fun . on November 06, 2016, 01:30:54 pm
I dont know what your wanting. But I could have told ya about this picco set up.

https://youtu.be/9swTwIzs6MQ
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on November 06, 2016, 01:45:04 pm
That's old news Kevin. Stihl Canada has sold that up here as the MS261 Tuning kit, for a couple of years now.
I got one with 3 loops of PS63, 7T Picco rim and 16" bar for $99.

This here kit (below link) will get a OEM Picco rim on a MS341, 361.
http://m.ebay.ca/itm/291225342561?_mwBanner=1
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on November 06, 2016, 02:00:19 pm
Here to add to my last post.  This is my MS261 Tuning Kit.
Title: Re: Random bar, chain and sprocket development
Post by: Cut4fun . on November 06, 2016, 02:06:12 pm
I'm not understanding I guess.   I figured whatever worked on a 260 261 would fit a 341 361 036 360. Never compared my drums etc though.

Thinking about it my 026 036 both had the small bearing set up. The 361 had the updated bigger bearing set up.


stihl picco bar 30030006313

3003 mount in 3/8 Picco.

13" 3003 000 6306 ( 50dl )

16" 3003 000 6313 ( 60dl )

18" 3003 000 6317 ( 66dl )
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on November 06, 2016, 04:30:20 pm
Yep the early 034-036 had the mini 7 spline clutch drums but today the MS241-MS261 are the largest saws to still have the mini 7.
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on January 23, 2017, 02:54:18 pm
Here's the old G-107 File N Joint introduced in the mid 1970's.
 I filed my race chain with this guide in the late 70's to mid 80's. :D

 
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on January 23, 2017, 11:18:07 pm
Quality control at the Swedish  Husqvarna plant circa 1975.
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on January 24, 2017, 12:59:53 pm
Some drama in 1975. Omark introduces 91 series chain and Sabre intros their own version.
Ends in a lawsuit in 1982.

Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on January 24, 2017, 01:01:33 pm
Also in 1975 Shot blasting Tillotson carburetors in Ireland.
Title: Re: Random bar, chain and sprocket development
Post by: HolmenTree on January 24, 2017, 01:04:01 pm
Some impressive Stihl 044 specs in 1989.
12.8 lbs
I handed these out to Husqvarna dealers and endusers that year when I worked for Stihl ..lol.