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Lapping- Sand Grits

post #1 of 25
Thread Starter 
Would it be ok to go 320, 600, 1000, 2000? What's the advantage in going with small incriments (200, 400, 600, 800, 1000, 1500, then 2000?)
post #2 of 25
It's best to go in small increments so you don't have to work as hard to remove the scratches left by the previous grit, you'll eventually get to the same place, but it may take you days.
    
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post #3 of 25
Take a look at pic #4, I do it this like so: belt sander 240, 400 and keep using the same peice, let it wear out and it will almost reflect from there, then 1200, then a canvas type cloth (still on the glass) with polishing compound and it doesen't take days either.
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post #4 of 25
Depending on how far you need to go and how much needs to be taken off to achieve a flat surface will be different for most lapping jobs. All I have needed to do is get some 2000 wet\\dry and give it 5 minutes or so and hey presto- flat
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post #5 of 25
Yeah we should have asked what you were lapping...
    
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post #6 of 25
Quote:
Originally Posted by tuchan
Depending on how far you need to go and how much needs to be taken off to achieve a flat surface will be different for most lapping jobs. All I have needed to do is get some 2000 wet\\dry and give it 5 minutes or so and hey presto- shiny and flat
Absolutely! I agree 100%, if you are working with a new block that is supposed to be ready to go they are almost there already, what I refer to is a raw copper surface right off the mill.
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post #7 of 25
i used 600
luckii.3
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post #8 of 25
whats the cheapest palce to get this sand paper? i dont think i remember wal-mart carrying 2000 grit, but i might be wrong.

Also my dad has something he refers to as a jitterbug, its like the black & decker mouse but is alot bigger and can use regular sandpaper pieces cut in half. Would this be ok to use to lap a HS's surface?
post #9 of 25
Thread Starter 
Got mine at Kragen Auto Parts.

Assorted (2x320, 1x400, 1x600, 1x800) costed 4 bucks.

1000 Grit (5x1000) costed 4 bucks.

2000 Grit (5x2000) costed 4 bucks.

So costed about 12 bucks.
post #10 of 25
Quote:
Originally Posted by The Hundred Gunner
Got mine at Kragen Auto Parts.

Assorted (2x320, 1x400, 1x600, 1x800) costed 4 bucks.

1000 Grit (5x1000) costed 4 bucks.

2000 Grit (5x2000) costed 4 bucks.

So costed about 12 bucks.

not bad, so auto stores, ok, thx...

what about that "jitterbug" thing, will it be ok to use?
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