Looking for a new magnetic chuck for our Harig 6 x 12 grinder

[Edster]

I'm looking at a new magnetic chuck for our Harig 6 x 12 grinder. It's just a basic hand operated surface grinder. It's from the late 90's and in excellent shape. We do basic grinding tasks and are looking for a general purpose lever actuated magnetic chuck. I'd like to keep it an American made good quality chuck.

I have some Suburban tooling now. A sine set sine plate with mag chuck, and a master grind. They are nice pieces and I'm thinking about getting one of the suburban mag chucks.

They have this one which looks like a general purpose chuck.

PERMANENT MAGNETIC SURFACE GRINDER CHUCKS by Suburban Tool, Inc.

And this one that has more holding power.

MAGNUM-FORCE SURFACE GRINDER CHUCKS by Suburban Tool, Inc.

Which one would you guys get? Any others I should be looking at?

Thanks in advance!

 

[stephen thomas]

What do you grind the most?

Thin stuff, or heavy parts? Tall parts?

The "regular pitch" chucks bite harder on large objects. The fine pole chucks hold thin & small stuff better.

I have a Suburban fine pole 6 x 6 sine chuck and like it a lot, but I'm not so sure the holding power is quite as good as an older Robbins/Excello compound sine chuck here. I think the Mitutoyo tilting chuck here has the high/lo spacing and I even use it for planing and milling (with blocking) but we are talking large heavy castings on that one.

If you don't do much in the way of thin pieces, the regular pitch chucks work well, and apparently save a $100 or so. If you do thin and small pieces, it is worth springing for the fine poles.

That said, my daily user on the 618 grinder is an older B & S micropitch chuck. I love it because it will take really small thin stuff, and then still hold fine for the larger fixtures, spindex, parts, etc..

Here's a beat 510 version on ebay, with the magnifier, looking at the edge, it can be seen how fine B & S really went!

Brown Sharp 510 Permanent Magnetic Chuck 10" x 5" | eBay

smt

 

[Davis In SC]

Sure is hard to beat an OS Walker chuck...

 

[Joec@westminster]

A walker electromagnetic chuck with a variable rectifier is far more versatile than a permanent magnetic chuck, so much so that its higher cost is worth while.

 

[stephen thomas]

I've got a 10 x 24 Hanchett electromag on the D1030 and for absolute holding power & versatility like residual for flattening parts, "mostly" agree with the above. But the OP asked about a small 618 manual grinder and specifically mentioned permanent magnet. I'm no so sure i'd prefer an electro mag for quick grinding jobs on a smaller grinder. Takes a while to warm up (to size/flatness), costs more, and there's more "stuff" (cables) around the machine. I think its a toss up unless the OP knows they need either: absolute strongest holding power, or ability to trim residual hold on parts down to "barely any". IOW, excellent option, may or may not be the most convenient for a given situation.

smt

 

[split tenth]

Electromagnetic chucks are electronic parts heaters. If the electricity fails your set up may be laying on the floor.Before installing the chuck grind it square and tap the front side for a rail.

 

[Don Bailey]

Edster
Stephen is correct in that it will depend on the type of work you are doing. For the very small thin parts , the Magnum- Force chucks are your best bet. You can call and speak with someone regarding your application (248) 391-7800 and receive proper guidance as to the best choice.

Stephen
The EXCELL/ ROBBINS chucks have been renamed Magna-Sine and are manufactured the same way as the older ones in our Factory in Auburn Hills , Mi.
MAGNA-SINE SINE PLATES by Suburban Tool, Inc.