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[machinist] OT. Why are lapping plates expensive?

From: Lawrence London <lfljvenaura@gmail.com>
To: machinist@lists.ibiblio.org
Subject: [machinist] OT. Why are lapping plates expensive?
Date: Wed, 18 May 2016 23:52:28 -0400

OT. Why are lapping plates expensive?
http://www.practicalmachinist.com/vb/general/ot-why-lapping-plates-expensive-320430/

"for a 4" square depending on what your doing a simple chunk of mild steel surface ground flat can work real well with diamond grit rolled in it, no real need for groves even i your using finer grits too.

Your millage may vary but it works great with 7 micron diamond grit for putting a near mirror finish on ground parts - smaller cutting tools."

[machinist] OT. Why are lapping plates expensive?, Lawrence London, 05/18/2016