Cylindrical Grinder

[Martin W]

What is a cylindrical grinder used for in a machine shop?

Cheers
Martin

 

[Cooter Brown]

I had a job for a while in a tool and die shop, they had about 20 OD grinders and 10 ID grinders...... We used them for grinding Press Forming Dies within .00002" tolerance...... A hobby machinist doesn't really need this machine...... Unless you find one made by Crystal Lake Grinders, they make small bench top machines.....

 

[Martin W]

Thanks
I was wondering how they worked? Is this the same as a centerless grinder?
Cheers
Martin

 

[Cooter Brown]

No, a centerless grinder is very different......ID and OD grinders use a chuck or dead centers..... Look up the Dedtru, its a centerless grinding attachment for a surface grinder...... It can do OD grinding and face grinding, but it can also do through feed grinding.....

 

[pdentrem]

We use ours to manufacture and maintain the work and backup rolls for our hot mills. Also use to make arbors for thin material slitter knives. Photo show the work rolls being ground to size after I finished their heat treatments and two arbors after turning on the lathe and on the Landis being ground to size.
Pierre

 

[benmychree]

OD grinders are able to greatly increase accuracy and concentricity of turned work and very accurately finish hardened work in size and finish.

 

[mmcmdl]

CG's are nice machines , very high precision . Internal , external and face grinding . I grew up using all kinds for shaft work , molds , anything heat treated or hardened . One repetitive job I had was turning and grinding Worthington Pump shafts up to 13 ft long . One COULD be useful in a hobby shop if you had the work for it , otherwise not really a needed machine .

 

[petertha]

Pierre, what kind of in feed depth of cut does that Landis machine increment the grinding wheel?

Is that particular shaft/operation done without any kind of support to prevent bowing of the part under wheel pressure?

 

[mmcmdl]

You can take .001 per pass if the shaft is large enough . The trick with grinding , do not support work unless entirely necessary . Support puts undo stress into the work . You need big time flood coolant or the work will pull into the wheel . When the work pulls in , your wheel breaks down and creates one he** of a mess . Most of the time the chatter doesn't clean up and the part is scrapped . C grinding is not an easy operation by any means . Heat is you're biggest enemy when doing any type of grinding .

 

[petertha]

Thanks. I should have been more clear - what is the minimum typical dial increment on the in feed wheel? Or maybe its dial indicator based or something? I've never seen the hands on, business end of these before. Just curious.