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Fail@Lapping

post #1 of 23
Thread Starter 
I am tearing into my watercooling setup, and have a lapping kit, the Rasa Block was shiny but pretty uneven so I thought I would give it a go, My kit had 200,400,800,1200,1800,2000,2500 grit, My results, not good... Take a look. I went 60 slides each direction in a 90 degree pattern on each grit. Used slight pressure.



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What does it appear I did wrong? The block is much flatter when doing the razorblade test, just not shiny
Edited by blkdoutgsxr - 3/20/11 at 3:54pm
post #2 of 23
Dont apply pressure, and make small circles. Also dont use water, the flakes of metal in the sandpaper will polish the block to a mirror shine. Thats what I did with my 945 and it worked out great.
 
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post #3 of 23
LOL! you need to use a flat surface, its impossible to do it with out a concave or convex shape. if you did use a flat surface then I have no idea lol
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post #4 of 23
Same happened to me too --> 2000 grit sandpaper was crap (didn't use 2500 grit). Got better results using a weared out 1000 grit paper(better quality)
Dont use any pressure at all.
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post #5 of 23
dont use pressure
depending on the quality of the higher grits it can hurt or shine ur lap
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post #6 of 23
Thread Starter 
I used plexiglass for my surface.i thought that you were not supposed to do circles....I'll try again...
post #7 of 23
Quote:
Originally Posted by blkdoutgsxr View Post
I used plexiglass for my surface.i thought that you were not supposed to do circles....I'll try again...
Dont do circles. Back & forth, rotate it 90' and back & forth again
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post #8 of 23
disassemble the block, don't lap it while assembled. Lapping while assembled gets rid of the desirable bow.
    
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post #9 of 23
Id recommend a sheet of tempered glass over plexi. You can get them off of cofee tables, glass desks, old electronic cabinets.
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post #10 of 23
Quote:
Originally Posted by Phos View Post
disassemble the block, don't lap it while assembled. Lapping while assembled gets rid of the desirable bow.
This is important.
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