Needles replaced by plane bearing Stihl 170

djsharpe · 19th February 2011, 09:34 AM

I lent my little toy & it came back stuffed. The clutch bearing had disintegrated so I decided to make a plane bush bearing for it instead of a replacement part. I had some stock rod, possibly an acetate material that was a few thous smaller than required & bored it out to 6 mm on my lathe then distorted the shape in the 3 jaw chuck in order to get an interference fit. Then finished it off to the reqd 10mm & then pushed in to clutch housing with superglue. Lubricated with sump oil in the hope that graphites in the oil will form a boundary lubricant. Has worked well so far & no slop. The bearing only has to work at idle or stall so could be successful. I might try it on my bigger CSs if they give trouble.

superfire · 19th February 2011, 12:20 PM

Sounds like alot of work for a sub standard saw series. Sounds like the factory bearing was not well maintained with grease.

newguy18 · 19th February 2011, 02:09 PM

Besides alot of work,it could also cut a groove in the end of the crank.

19th February 2011, 09:34 AM	#1
djsharpe Sappling Join Date: Dec 2010 Location: Sandringham Victoria Posts: 7	Needles replaced by plane bearing Stihl 170 I lent my little toy & it came back stuffed. The clutch bearing had disintegrated so I decided to make a plane bush bearing for it instead of a replacement part. I had some stock rod, possibly an acetate material that was a few thous smaller than required & bored it out to 6 mm on my lathe then distorted the shape in the 3 jaw chuck in order to get an interference fit. Then finished it off to the reqd 10mm & then pushed in to clutch housing with superglue. Lubricated with sump oil in the hope that graphites in the oil will form a boundary lubricant. Has worked well so far & no slop. The bearing only has to work at idle or stall so could be successful. I might try it on my bigger CSs if they give trouble.

19th February 2011, 12:20 PM	#2
superfire Former Member Join Date: Dec 2008 Location: Central Oregon Posts: 166	Re: Needles replaced by plane bearing Stihl 170 Sounds like alot of work for a sub standard saw series. Sounds like the factory bearing was not well maintained with grease.

19th February 2011, 02:09 PM	#3
newguy18 Part of the Furniture Join Date: Jun 2007 Location: orlando,fl Posts: 4,948	Re: Needles replaced by plane bearing Stihl 170 Besides alot of work,it could also cut a groove in the end of the crank. __________________ Have your say join us today. old schooler

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