Chainsaw Repair
Chain - Grinders - Filing - Wood Milling - Tools - Welding - Machinist - Mowers - Tillers => Chain - Bars - Grinders - Filing => Topic started by: SquareFile on August 15, 2015, 06:16:49 am
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I've had good gains in cutting speed using Stihl PS chain on 50cc saws. Thought I'd share on a mod that helped on small hub saws. I machined mini hub rims to fit small hub.
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Great idea.
That is so cool you can do that type of stuff.
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There'd be a market for those modified P-7 and P-8 rims if you decide to do a small production run of 'em. I'd be down for a few.
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That is a great idea. Nice work.
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Excellent market potential 8)
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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.
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Nice mod
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I machined mini hub rims to fit small hub.
Mill? Drill press? Hole saw? Rat-tail file? . . . . .
Inquiring minds want to know!
Philbert
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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.
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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.
IMO thats a good thing. Already small.
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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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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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My quotes are all screwed up. ??? ;D
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My quotes are all screwed up. ??? ;D
I tried to get what I think you were after. Close enough?
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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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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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Cheapo lathe and a tool post grinder does just fine on those "super hard" sprockets. Lol!!!
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Why would Forester sprockets be softer?
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My experience with forester sprockets is they wear faster.
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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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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.
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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.
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Would some type of abrasive method work better than hard tooling on the rim sprockets?
Philbert
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Would a ceramic cutter insert work on an interrupted cut or are they too brittle?
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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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That would work on the o.d. but not the I.D. to increase hub size
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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. ;)
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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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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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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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6K products = Danzco
The sizes listed below are for .375 Picco pitch chain. If you need a special sprocket size please call us at 360-264-2141.
The larger tooth count sprockets may not work on a stock chain saw. We will not be responsible for the sprocket not performing well or problems with chain life or safety. You are assuming all risks when using them.
Part No. Bore Tooth Count Description OD
DS0241 Large Oregon 7 Spline 7 7T375PSB 1.46
DS0250 Large Oregon 7 Spline 8 8T375PSB 1.61
DS0246 Large Oregon 7 Spline 9 9T375PSB 1.94
DS0247 Large Oregon 7 Spline 10 10T375PSB 2.09
DS0255 Large Oregon 7 Spline 12 12T375PSB 2.61
DS0252 Small Oregon 7 Spline 7 7T375PSS 1.46
DS0249 Small Oregon 7 Spline 8 8T375PSS 1.61
DS0244 Small Oregon 7 Spline 9 9T375PSS 1.94
DS0245 Small Oregon 7 Spline 10 10T375PSS 2.09
DS0254 Small Oregon 7 Spline 12 12T375PSS 2.61
STIHL RIM SPROCKET (MS7) .375 X 7 TOOTH PICCO 3/8LP 00006421240 0000 642 1240
3/8LP Picco 8T 00006421241 0000 642 1241
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Good find Kevin! About time Danzco got on the bandwagon with the .375 LoPro rim sprockets. Probably all the interest in the Stihl PS chisel chain that fueled it.
No 6 pin unfortunately but a 7 pin in small 7 spline would be a big seller for the small Husqvarna's.
Chainsaw millers can run the large 7 spline 7, 8, 9 pin rims .
10, 12 pin Picco rims? Modified saws cutting 6"x6" pine with a square filed PS chain? ;D
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Probably all the interest in the Stihl PS chisel chain that fueled it. . . . No 6 pin unfortunately . . .
I once asked an Oregon rep about 3/8 low pro rim sprockets - he said that they were just too small. Clearly, someone has figured how to make them, along with 1/4" pitch that I have seen on other threads.
Nice that they fit the more common Oregon rims.
Philbert
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Looks like Danzco has changed their name:
http://www.6kproducts.com/chain_saw_sprocket.html
Philbert
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6K products = Danzco
Looks like Danzco has changed their name:
http://www.6kproducts.com/chain_saw_sprocket.html
Philbert
;)
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The last few weeks i have been working in the forest with husky/stihl 50cc saws + MS200 3/8LP chains. Stihl 63PM is the most used, the other two chains are 63PS , oregon vxl. Stihl 63PM is more robust and "hevier" compared to oregon vxl, that's why I like it. During the 6-8 hour day i sharpen lightly 2-3 times.
Anyway, time will tell how long this drum/rim will last. ( tools that i used, proxxon , sanding drum, diamond coated burr + one cold beer )
(http://u.cubeupload.com/finland1/StihlP7Oregonsmall.jpg)
3/8LP at the bottom.
(http://u.cubeupload.com/finland1/P7oregon38.jpg)
Left .325 oregon 95 , Right 63PM 3/8LP comparison.
(http://u.cubeupload.com/finland1/325VPXvs38PM.jpg)
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Great job making that Picco rim fit the small spline drum.
Yes NK. 325 works great on a 50 cc saw, but a 63PS or PM works even better 8)
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Anyway, time will tell how long this drum/rim will last. ( tools that i used, proxxon , sanding drum, diamond coated burr + one cold beer )
Nice sprocket mod!
Philbert
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Would be a great little business venture. Picco rims for small mount Husqvarna's. ;)
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Would be a great little business venture. Picco rims for small mount Husqvarna's. ;)
I already have them, they are expensive though.
takes 1 carbide endmill per rim
turning down 404 rims isnt much easier.
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Nate I tried the search on your website but nothing under rim or picco rim. Was just going to post a link for the guys.
So you want to post a link to lead them to the watering hole?
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Nate I tried the search on your website but nothing under rim or picco rim. Was just going to post a link for the guys.
So you want to post a link to lead them to the watering hole?
they werent on the site....they were a had to know item.
they are on there now though.
http://performanceoutdoorequipment.com/search?q=3%2F8lp+rim&x=0&y=0
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That's still not unreasonable. Thanks for making those available to us!
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Pretty cool. Thanks Nate. That will help those folks looking for the small and standard picco rims.
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Would be a great little business venture. Picco rims for small mount Husqvarna's. ;)
I already have them, they are expensive though.
takes 1 carbide endmill per rim
turning down 404 rims isnt much easier.
l
Your prices are very reasonable and those carbides are probably not cheap either.
If I ever get my 346XP NE back from my FIL I may just get one or two off you.
My 338XPT I'm running 63PS on it with the stock 6T spur. Your 7 T 3/8 Lo Pro rim would be a bit too much for it.
I do have a 7T .325 rim conversion for the 338 running NK chain. But the 6T spur and 63PS performs better.
I could run your rim on my 562 as I do have it converted to small spline drum with 23RS on a7T rim....
562XP running 63PS :o :D