• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

What do you use to "LAP" on??..Glass..Metal..??

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.

PDL

Member
Joined
Apr 21, 2001
Location
OH-Heartland of the USA
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.
 

cjtune

Member
Joined
Dec 18, 2000
I use either a plane of glass or a ceramic floor tile for sandpapering but I lap with burnishing paste and a finger.
 

Pitspawn

Member
Joined
Apr 25, 2001
Location
Essex, UK
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?
 

Mord-Sith

Member
Joined
Apr 4, 2001
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.
 

Monaco

Member
Joined
Jul 17, 2001
Location
Denver, Colorado
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
 

dozier768

Member
Joined
May 9, 2001
Location
portland,or
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