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View Full Version : What do you use to "LAP" on??..Glass..Metal..??

PDL
07-29-01, 07:20 AM
Seems to me an important factor that gets little attention!
I was using a piece of composite wood with plastic laminate applied to it but I think the next time it will be a piece of 1/4" plate glass on a solid table.

Lappers, sign in please.
Shadow рс
07-29-01, 07:32 AM
my kitchen counter top. Very flat. =)
sgt. york
07-29-01, 08:51 AM
Glass works the best for me.
cjtune
07-29-01, 09:00 AM
I use either a plane of glass or a ceramic floor tile for sandpapering but I lap with burnishing paste and a finger.
Karsta
07-29-01, 09:28 AM
Glass mirror - not a magnifying type.
Tacoman667
07-29-01, 11:33 AM
Shadow рс (Jul 29, 2001 07:32 a.m.):
my kitchen counter top. Very flat. =)

Same here.
OpenFriday
07-29-01, 01:09 PM
Glass mirror.
Pitspawn
07-29-01, 07:20 PM
The hubble telescopes' lens :) J/K

Actually, before any astonomy expert points out I'll tell ya. The hubble telescope is not really flat. A fleck of paint in the measuring instruments made the lens concave slightly. But its still damn flat.

I'd really like to get into lapping. Do I have to use machinery or can I just use a sandblock with the wet grit paper? And how do I make the circular motions w/o messing up the flatness? Any tips?
dozier768
07-29-01, 07:24 PM
a smoothe peice of pollished marble
Mord-Sith
07-29-01, 07:49 PM
glass and pollished marble are the only things you should lap on. Due to the method of which glass is made even relatively cheap glass is flat enough for a hobby lapping surface. I epxoied a piece of glass to a cutting board thats what I use.
*spazzed*
07-29-01, 08:00 PM
Machined piece of aluminum ;D
Monaco
07-29-01, 08:04 PM
I use an old chunk of polished marble, left over from my kitchen countertops. Works fine for me, I guess.

Anybody know of an easy way to verify that your 'sink or lapping surface really IS flat?

-the monster
[Oc]acaridans
07-29-01, 08:10 PM
just a block of wood.
dozier768
07-29-01, 08:12 PM
Monster of Rock (Jul 29, 2001 08:04 p.m.):
I use an old chunk of polished marble, left over from my kitchen countertops. Works fine for me, I guess.

Anybody know of an easy way to verify that your 'sink or lapping surface really IS flat?

-the monster

use a machiners edge and a feeler guage
Mord-Sith
07-29-01, 09:33 PM
dozier is that you or luke perry ?