surface grinders--WHAT FOR?

marekz

marekz

Joined
Jun 16, 2008
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what are some of the things you can do with a surface grinder?-thanks marekz--HOw does it work??
 
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Besides getting steel (blades, or blades and springs) accurately flat I cut all my
nail nicks except long pulls with mine.
Ken.
 
Springs-- it can take a thick spring and flaten it--thats amazing-marekz
 
I usually surface grind my blades after I heat treat them especially when they develop some funky pattern that can't be buffed off (half steel color and that grayish color which is not decarb or scale.)
 
I bought this one in good used condition. The best $850 I ever spent. My knives and guns took a major move forward.

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great photos-so there is one moving grinding wheel with a FLAT bottom, How do you keep the blade and the pistol from flying off that table???-thanks--marekz
 
Marekz, the chuck (table) is magnetic.


Edit- Surface grinders are also great if you make damascus bar stock to sell.
 
teh chuck must be one hell of a magnet to hold doen that steel. what if your using something thats non magnectic?--stupid question?--marekz
 
Holy cow, $850 Bruce, what a steal where did you get it?
The cheapest Ive found have all been over 1g.

Sean
 
Marekz,

I've seen small and irregular parts surface ground by holding them with a metal machinest vice or something similar that is held with the magnetic chuck.

--nathan
 
Someone on this forum reported having a set of steel feather clamp like things. The
clamps are held on by the magnet and have some sort of slotted, slightly slanted edge
that can push against non-magnetic materials to hold them down.

I know this explanation sucks, but have never seen pictures of the things. The original
poster also said that they're not made any more so if you want them you'd have to
figure out how to design and fabricate your own.
 
marekz said:
teh chuck must be one hell of a magnet to hold doen that steel. what if your using something thats non magnectic?--stupid question?--marekz
Click to expand...

Most of the time (on the SG's I've used anyway) .020" is HAWGING! so while the magnet is powerful. you normally only take .005-.010 per pass.
 
what is that wheel made out of on a surface grinder?...is it some type of stone or something?.....does it have to be flattened or dressed ....r there different grits?....how long does it last......i have no plans for one just curious.....i know nothing about them really.....ryan
 
at work we do surface grind non magnetic stainless quite a bit. we hold the parts down with real sticky dubble sided carpet tape. it works great. i okley take off .003 to .004 max per pass. i then go back and do a .001 pass falowed by a few .0005 passes. comes out great.
 
ryan9977 said:
what is that wheel made out of on a surface grinder?...is it some type of stone or something?.....does it have to be flattened or dressed ....r there different grits?....how long does it last......i have no plans for one just curious.....i know nothing about them really.....ryan
Click to expand...

I've seen pics of some that use a belt. Probably not as precise as the stone ones as the belt wears away but I guess stones wear away too so who knows.
 
The magnetic table is powerful but sometimes a small part will lift and scoot causing some deep grinder marks so I have even super glued parts down or put them in a tool makers vice that is held down with the magnetic table. proper term is "magnetic chuck"

I cleaned up the octagon barrel on this too.

I am considering putting a 2 by 72" belt on the other spindle so I can just turn the head around and use the belt grinder. The neat thing is you can buy very fine grit belts and will eliminate almost all hand sanding.
 
Bruce's mag chuck pictured is a regular pole... that means there is a pretty large distance between poles on the chuck. Ideally, you would have a fine pole chuck... The short of that story is that a fine pole is best for holding small, fine parts, as it has a better grip on small parts.

A chuck like this is basically like a set of window blinds. When the lever is to one side, the blinds (lead panels) are closed and the magnet cannot hold your part (so you can remove them from the chuck)... turn the handle to the other side and it "opens the blinds" and allows the magnets to hold down the parts.

I've used double sided carpet tape, but don't like it as it is hard to get off of the part and the chuck. I prefer the black rubberized super-glue... then just use the super-glue debonder to remove the part and get the gunk off. :)

I use my surface grinder more than I use my mill. :) Darn near every part that is flat in one of my knives, was put on the s. grinder.... ricasso, guard stock, spacers, pommels... :)
 
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