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Burn streaks on the work
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03-18-2014, 02:10 AM
Thanks for posting that video Tom - I found it very interesting. I know next to nothing about surface grinders, only having seen them in operation a couple of times. I too wouldn't mind adding one to my shop but like most things here, they are few and far between (or well out of my price range).
Hunting American dentists since 2015.
03-18-2014, 08:12 AM
Operation is pretty simple, just practice rubbing your tummy and patting your head - but it's the wheels that throw me. Each grit size comes in 26 levels of hardness and a bunch of different binders and types of grit, and I'm a-thinkin there's a reason for each. For example, the wheel in the photo produces a nice finish on structural steel that I use for fixtures & spacers, but it's failing miserably on the chuck. Which wheel to use is always the question.
03-23-2014, 07:38 PM
Good video! Traversing the table as fast as I can made the results so much better. This is per the grinder manual, .050 stepover, 60H grit, final pass @ .0001"
03-24-2014, 06:47 AM
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.
03-25-2014, 07:58 PM
Looks like you nailed it! Great job!
03-26-2014, 08:15 AM
Except at the bottom edge when my arm went numb. Btw, there's a direct drive single phase old pump motor spinning that grinding wheel.
03-26-2014, 05:16 PM
Single phase motors on surface grinders are often the cause of the indulating pattern in the surface, that's why the good ones all come through with 3-phase motors. I encourage you to swap that motor out and run a 3-phase thru a VFD or rotary phase converter.
03-26-2014, 05:40 PM
hi well as i use one of thees at work see if this will help you we only get the stones of a locale company and they have a chart that covers their range of stones and Wat to use them on as most things at work is ether d2 or gage plat or cast we only have 4 types of stone blue = gage plate black d2 pink cast White forming if you get your stones from one supplier see if they have a chart to cover their stone range and use
krv3000, proud to be a member of MetalworkingFun Forum since Feb 2012.
03-27-2014, 08:30 AM
(This post was last modified: 03-27-2014, 08:42 AM by Sunset Machine.)
Here's the roughing pass, 46K, .0015" with a .050" stepover. The motor might have something to do with this, I dunno. What do you think, krv3000? Does this look normal for a rough pass?
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