What angle grinder to get? That is durable

[Erie Fred]

Can't burn this one out:'

Copco GTG40 Industrial air grinder

Made in Sweden! This BEAST will grind forever. New these are $1700.

www.facebook.com

 

[Mark 2]

Can't burn this one out:'

Copco GTG40 Industrial air grinder

Made in Sweden! This BEAST will grind forever. New these are $1700.

www.facebook.com

I guess that's yours Fred?

 

[Erie Fred]

I guess that's yours Fred?

Nope, I have a few air powered, but the large 3hp type with either 7" cup saucer wheel or smaller thicker "rock".
I've never seen those sold used, and can't afford new, the posting is the first time I've seen one avail.

 

[brightspark]

Can't burn this one out:'

Copco GTG40 Industrial air grinder

Made in Sweden! This BEAST will grind forever. New these are $1700.

www.facebook.com

just the motor on the big compressor that needs to run it

 

[brightspark]

Nope, I have a few air powered, but the large 3hp type with either 7" cup saucer wheel or smaller thicker "rock".
I've never seen those sold used, and can't afford new, the posting is the first time I've seen one avail.

i passed on getting one given years ago didnt have a big enough comp to run it . now got the comp but costs a fortune in leccy to run the comp so still not worth having

 

[Erie Fred]

i passed on getting one given years ago didnt have a big enough comp to run it . now got the comp but costs a fortune in leccy to run the comp so still not worth having

Yup, we've hashed that fact to death here.

It still stands that the OP is working the tool too hard.

Air powered can be stalled forever with no harm.

Cheap, fast, durable.
Pick any 2.....age old battle.

 

[eddie49]

CP came out with "Hi-Cycle" electric grinders in the 1950's for those in industry that didn't want air powered.
The had a M-G set to make IIRC 400 hz 3 phase, and sealed motors with no brushes.

The German company Fein offer a similar system, with sealed 200v 300Hz 3-phase induction motors in the tools and an external inverter to supply the power:

https://fein.com/media/pdf/highFrequency/en/catalog.pdf

 

[8ob]

Yup, we've hashed that fact to death here.

It still stands that the OP is working the tool too hard.

Air powered can be stalled forever with no harm.

Cheap, fast, durable.
Pick any 2.....age old battle.

I have a small 4" air grinder, brilliant bit of kit. Its not got the grunt of anything electric but you can get very good speed control on one which is useful, dont always want or need 10,000rpm.

Bob

 

[Jack_K]

air grinders quickly train you in how much force to apply to any grinder.

 

[Pete.]

Blow them out with a compressor, kills the brushes my boss reckons, don't see how myself.

If your compressor is blowing a lot of water out with the air it might otherwise I think it'srubbish.
I used to work with a guy who had a trick where he would take the brushes out of a machine, dip them in water then put them back in. They would last only minutes then and he would get an early day.