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  #1  
Old 01-17-2006, 04:18 PM
JADknives JADknives is offline
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Home made Surface grinder

Got a question for ya tool guys. I tried to make a surface grinder by making a slideing thing under the wheel of a bench grinder. It worked somewhat, my test piece was within .006 using a micrometer. My Question is can the wheel by made to apply pressure by a spring pushing it down on the material or would that just follow the surface up and down?


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Old 01-17-2006, 08:02 PM
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Ray Rogers Ray Rogers is offline
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Doesn't sound like a good idea. A commercial surface grinder works by virtue of being able to hold the wheel RIGIDLY at an exact distance from the table with only the tiniest bit of pressure on the work piece. Using a spring loaded wheel would have pretty much the opposite effect. No matter if it followed the contour of the work piece or not, it would generate a huge amount of heat. When the work piece is allowed to get hot on a commercial surface grinder you get warpage in the work piece....


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Old 01-17-2006, 10:15 PM
JADknives JADknives is offline
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That makes sence. I'd like to convert it to a belt so I can change grits. Would it be better to have a rubber coated wheel or a hard wheel?


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Old 01-18-2006, 07:50 AM
george tichbour george tichbour is offline
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A very hard rubber wheel would be preferable about 100 durometer Shore A hardness would be my guess. I have a through feed grinder with 80 durometer Shore A wheels and it tends to round edges a bit.


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Old 01-18-2006, 09:57 AM
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I have a belt conversion on my surface grinder. It uses one of Bertie Rietveld's wheels which, I believe, is a 90 durometer (anyway, it's way harder than a regular contact wheel). See Bertie's info on these wheels at http://www.batavia.co.za/Surface%20Grinder.htm


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Old 01-18-2006, 05:36 PM
JADknives JADknives is offline
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Thanks for the info guys.


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  #7  
Old 01-19-2006, 01:48 AM
JADknives JADknives is offline
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Red face

Is Anyone intreseted in a homemade surface grinder?
If ya think it can't be done.



Think again,

I'll post a pic. If ya like. Or Piss on it ?

Should I pIss or sould I post?


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Old 01-19-2006, 07:41 AM
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hmmm........ post it!


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  #9  
Old 01-19-2006, 02:18 PM
JADknives JADknives is offline
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Here we go it's a dandy. Made the wheel out of wood. I wanted to see if it would work before I buy a real wheel. Can grind 12 inch long and 3 inch wide.


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Old 01-19-2006, 02:54 PM
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Cool! Does it hold within .001 over that 12" length ?


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Old 01-19-2006, 04:53 PM
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Dwane Oliver Dwane Oliver is offline
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That is cool. How long is that belt ?


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  #12  
Old 01-19-2006, 08:48 PM
JADknives JADknives is offline
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Well I just ground a 10 inch blank and it measured at .003 from one end to the other.

Has a 1 x 30 belt.


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Old 01-19-2006, 11:09 PM
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WOW , thats pretty good for what you have there , you've got me thinking now. Great job.


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  #14  
Old 01-21-2006, 11:59 AM
chip williams chip williams is offline
 
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I like it! how do you hold the blank down?

chip
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  #15  
Old 01-28-2006, 07:21 PM
tmiller5087 tmiller5087 is offline
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Great idea James, looks good. 003 is pretty impressive. I have a question about surface grinders for you all, well an idea. I was looking around the web for surface grinders and came across dual wheel grinders that have been used in the auto industry for years. Look very exspensive. So my question is why couldn't one put two disc grinders face to face with one adjustable for thickness and pressure and use that as a surface grinder. Add one of them little coolant pumps like is used on end mills and horizontal bandsaws to eliminate heat. Would need a fixture thinner then the steel to hold the steel and slide it thruogh the discs. plausable or dumb ass idea? whadda think?

thanks Terry
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