How can I grinding a spherical Radius on an OD - CNCzone.com-The Largest Machinist Community on the net!

scmachining · #1 11-23-2007, 09:19 AM

Hello all,

I have a need to grind a spherical Radius on the OD of a part.
The part is approx. 4" in Dia., it has a 1" bore through, and is approx. 1.5" thick. I have to hold a +/- .0002" tolerance all around this OD spherical Radius.
I have a B&S 618 surface grinder and a B&S #13 ID/OD grinder as well.
Does anyone have any experience with such grinding, or have any fixturing ideas that could help me. Thanks to all for such a great and informative collection of invaluable information.

Chris

djr76 · #2 11-23-2007, 02:01 PM

Im no grinding expert, but wouldn't you rough it with a lathe first then dress your wheel to the radius and finish grind the part to size?

scmachining · #3 11-23-2007, 02:53 PM

Sorry, I did not clearify... The part will be roughed out on a lathe and heat treated.
there will be approx. .005" stock per side to grind off. I thought I could dress the rad.
on the wheel, but was told it is more accurate to "single point" grind such a rad. with this tolerance. Thanks for the reply

Chris

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