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| dawesy:
Myfordboy on you tube did a video on lapping a cylinder. If this one needs it (though it sounds like you've got it spot on) it could help. |
| Stilldrillin:
This is my method. Piece of dowel. Minus a thou or so, on bore size....... Smear of fine grinding paste. Plus oil, as time goes on. Around 80rpm....... The cylinder is oscillated backwards n forwards. Reversing occasionally on the lap. Until all feels smooth with no tight spots. Works for me! :thumbup: David D |
| ian_in_the_midlands:
I have seen the video from myforboy where he is lapping a cylinder. One of the few videoes I could find showing the lapping actually being done. I have watched and enjoyed alot of his videos. If I find I do need to lap the cylinder I will try your method David. Thanks. Before I do that though I may polish the cylinder a little using the piston. What abrasive, if any would I use for this? I do not want to risk anything that might embed itself into the cast iron. Someone recommended tooth paste but that seems a little course. I thought maybe just using oil or possibly powdered chalk? |
| lordedmond:
Fine grade Time Saver powder is the bees knees for laping It breaks down during use and becomes none abrasive , it can and is used in industry to bed in gear boxes the fact that it breakes down meand that the gear box will not need dismantling for cleaning I will get a link Here you go http://www.steamsupplies.co.uk/category/engineering-supplies/sub,36/30/1/0 Stuart |
| gmac:
And a booklet to go with it..... http://www.newmantools.com/lapping/timesaver_booklet.pdf You made me go looking..... :thumbup: Cheers Garry |
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