Re: [CAD_CAM_EDM_DRO] Re: Digest Number 4217

I would use non embedding lapping compound such as Timesaver. I used it to
lap out the high spot on my poorly built mill/drill. It works great. I have
used this brand for about 30 years on different jobs. I still treasure
having a can of the yellow Timesaver for soft materials and Green Timesaver
for hard materials. Do a search on Google and a source for it should come
up.
Dan

----- Original Message -----
From: "Dave Shiels" <dshiels@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 23, 2005 4:13 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Digest Number 4217


>
>
> One also needs to consider the possiblity of "charging" the cast iron
> when lapping. Generally lapping in a precision machine shop is a hard
> steel surface being lapped by a charged cast iron one. Cast iron is
> pretty soft and the surface can become embedded with lapping compound.
> Be afraid of abrasives on your cast iron parts. Lapping compund can
> actually bite into the surface of cast iron.
>
> R Rogers wrote:
>