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hammerfest
06-30-2012, 08:07 PM
Thought you gents might find this useful especially if you have never tried this before. I am rebuilding a Harig Surface Grinder and needed to rewire and reswitch the electrics. Thought it would be a good time to spiff it up some. Here's the process:

Tools:

Mill or Drill-press running at ~1000 RPM touch time about three seconds (light touch)
Cotton Buffing Bob of desired diameter
Clover Lapping Compound (shown is results on steel and aluminum using 280 grit (fine))
Paint brush
Lots of time and patience
DRO is certainly useful if using a drill press graph paper is a good alternative

Here are the results:

http://i359.photobucket.com/albums/oo32/200mphBusa/Engine%20Turning/DSCN4353.jpg

http://i359.photobucket.com/albums/oo32/200mphBusa/Engine%20Turning/DSCN4351.jpg

http://i359.photobucket.com/albums/oo32/200mphBusa/Engine%20Turning/DSCN3572.jpg

http://i359.photobucket.com/albums/oo32/200mphBusa/Engine%20Turning/DSCN3576.jpg

michigan doug
06-30-2012, 08:22 PM
Spiffy!

Adds that nice finishing touch.

Finest regards,

doug

wierdscience
06-30-2012, 08:48 PM
Looks good,should be able to adapt that to CNC even.

sasquatch
06-30-2012, 08:59 PM
Very nice Hammerfest!!

Good looking stuff!

justanengineer
07-01-2012, 12:11 AM
Very, very nice. Ive been working on a redesign of the electrics on my mill. Think I might have to do something similar.

Deus Machina
07-01-2012, 04:27 AM
Mmmm, mm. I think I may have a couple projects that need some brass and an hour on the mill table now...

aboard_epsilon
07-01-2012, 07:12 AM
The spirit of st louis.

http://san-diego-aerospace-museum.visit-san-diego.com/Spirit-of-St-Louis.jpg

THINK I READ SOMEWHERE ..YOU HAVE IT RIGHT, WHEN YOU GET THE RAINBOW EFFECT LIKE A CD

http://farm4.static.flickr.com/3623/5698250256_57aec01cc4.jpg

all the best..markj

hammerfest
07-01-2012, 07:36 AM
Not sure how you would get a rainbow effect, might be more related to the material.

RussZHC
07-01-2012, 07:39 AM
Do you clear coat? Or sometimes, depending on usage...

Or do any future scratches/marks sort of get lost in the pattern?

gwilson
07-01-2012, 09:22 AM
Extremely fine,even scratch pattern in the turnings might give that effect.

kendall
07-01-2012, 03:22 PM
THINK I READ SOMEWHERE ..YOU HAVE IT RIGHT, WHEN YOU GET THE RAINBOW EFFECT LIKE A CD

http://farm4.static.flickr.com/3623/5698250256_57aec01cc4.jpg

all the best..markj

That looks like the mylar used for stickers etc, very shiny and the pattern is far too square to be engine turned.


Yep:
http://www.identi-tape.com/deco-prismatic.html#

philbur
07-01-2012, 04:08 PM
The rainbow effect is the result of a light-wave interference patterns. You need parallel uniformly space scratches. The spacing of the scratches need to be of the same order as the light wave length, so something around 0.001 mm or less.

Phil:)