Micropolishing a crank at home
I know this can easily be done, but I'm just not sure what grit sand paper to use. Does anybody have any first-hand experience doing this?
I saw one person said to use 600 grit which seems a little rough.
I saw one person said to use 600 grit which seems a little rough.
dont think i would do it that way. but i remember reading about using a nylon rope and wrap it around a few times and pulling it back and forth polishing the surface. most will recomend a shop doing it with the right tools and balancing it.
What we used to do in my machine shop class is get some (i want to say) 1000 grit sand paper and rub it on a piece of metal we have laying around until it got very dull, then we would use it on cranks.
when i polish them at my work i just rip thin strips and wrap it around the journal and then cross them and move your hands back and forth. It will pass back and forth evenly. Just look for any imperfections or pitting. You'd have to get pretty western with some fine sandpaper to mess a crankshaft up
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HMTforlife »</TD></TR><TR><TD CLASS="quote">What grit do you use?</TD></TR></TABLE>
320
320
Just what I was always told to use by my supervisor. Clearances are a little more loose than honda engines (.003") for main and rod bearings but I still think that anything really fine wouldnt do much to the chrome plating
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