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Post by karla48 on Mar 13, 2013 12:22:54 GMT -5
Has any one tried honing cylinders on older 330's ?, I understand they have a Nickel-silicone plating on the cylinder, and obviously you don't want to remove the plating. But I'm thinking a lite cleaning with a fine grade of aluminum flex hone, could work. So curious If anyone has tried to restore their cylinders this way?  |
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Post by Brian VT on Mar 13, 2013 14:38:06 GMT -5
Lots of opinions on this. Many say it's not necessary and you risk doing more harm than good (be careful not to chip the plating at the edges of the ports). Others say that it's worth doing.
You'd want a fine-grit ball hone of the appropriate size.
I usually just deglaze the cylinder with a Scotch-Brite pad.
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Post by karla48 on Mar 13, 2013 15:08:32 GMT -5
Brian, Thanks for your thoughts! Yes-I use scotch brite too, but it is a little bit of work with the scotch brite, I was also thinking about making on my wood lathe a wooden or composite material mandrel of some type that would hold a large piece of scotch brite, and that would make it a little easier to turn or spin the scotch brite inside the cylinder, and I guess thats why I thought of the aluminum flex hones too! They are available in 240 and 320 grit grades which would be fairly fine grade, and I think If you only did about a 15-20 second spin, it should work. Undecided yet ?
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Post by tribulation138 on Mar 13, 2013 16:52:52 GMT -5
the aluminum sleeves are very thin already on chainsaw engines. If i cant get any grooves out with sand paper or scotch bright. i give up. the only other way would be to buy a custom sleeve for the jug
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Post by karla48 on Mar 13, 2013 18:21:03 GMT -5
Tribulation138, Thanks for the input. I spoke with an old homelite dealer, and he said the same thing, they basically throw the cylinders away and put in a new one. Of course for a Dealer its probably about time and money, and obviously not worth paying a worker for an hour to clean, hone, and polish a cylinder. I do have a friend that machines cylinders for jugs, and I probably should send him an E-mail, and see what it would cost to make a cylinder. I know he uses a "Sun" machine, a little bit out of my price range. Lol.
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dynodave
Saw Builder
equal opportunity GEARHEAD
Posts: 246
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Post by dynodave on Mar 14, 2013 12:57:52 GMT -5
IF 330 barrels are chrome plated aluminum like most chainsaws which is different from nicasil....
Some think cleaning melted/scored aluminum piston residue off with hydrocloric acid (muratic is the dilute home grade) is the trick. Fortunately I work at a place that has a chem /plating lab and the chemist says the HCl eats chrome for lunch and should be avoided at all cost. Lye/sodium hydroxide eats aluminum but does not touch chrome.
Personally I would never hone a plated cylinder. Possibly I'd spot treat the aluminum off and locally rub a bit of med or lite scotch brite on the removal area.
Only on a super unobtanium or expensive cylinder would I then replate the bore with chrome or possibly nicasil. (Luckily and by design I don't own or want any of them)
Otherwise it's junk in my book.
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