will my bench grinder pull out enough power?

[gopedhead]

I have a robyi bench grinder rated at 2.1 Amps and i'm not sure if it will have enough juice to pull a 12" wheel. what do you guys think?

[mcaswell]

All that tells us is it's a pretty small motor.

You need to look at the horsepower.
To push a 12" wheel, you'll need a 2hp - 19 amp 3500rpm machine.

[tomg552001]

2 amps wont do squat. Thats probally about 1/2 HP, and won't move 12 inch wheels. Invest in a nice buffer making atleast 10-12 amps and atleast 1 hp. You'll be able to lay into pieces and see some nice results.

[bhhodges]

i can assure you it wont polish anything even with an 8" wheel---been there done that,find you a real buffer if your gonna be a serious metal polisher.


bill

[gopedhead]

i easily pull 8 inch wheels with ease, i'm justworried about the 12 inch, i'm probably just gonna use the 12 fluffy loose cotton for my white rouge. and prolly a 10 inch spiral and sewn for teh black and brown.

[gopedhead]

this is the link

http://www.ryobitools.com/product/pr...at=4&toolcat=3

and it doesnt' say the hp. i was really bummed about that

[tomg552001]

You're using 10 inch wheels on a 2 amp motor? Yes, it will spin them, but it wont have ANY power. As as soon as you attempt to put any pressure it will bog the grinder down. Being able to "lay into" the buffer is what gives you speed in polishing and from what i have experienced, much better results.

[tomg552001]

It's probally 1/3 HP, maybe 1/2. Thats not enough power for buffing. It is enough for a grinder, because a grinder dosnt require much pressure against the stone, where as buffing requires laying into the part if you will. Think of HP as HP, and Amps as Torque......

[gopedhead]

but i've used 8 inch wheels w/ ease. i mean polishing wheels! no grinding wheels.

[tomg552001]

you must buff with very light pressure and very small parts .

[gopedhead]

i dont think so, i buffed hard enough to bring a shine, just can't get the haze out or the scratches. i've been told to go bigger, that is why i'm thinking of the 12 inch loose cotton. i dont have 300 bux for a grinder. or buffer. if someone can link me to ebay w/ a good used one or new one, i'd appriciate it.

[bhhodges]

there is no possible way your going to be able to use this machine with a 10" or 12" wheel . when you use the 8" with no problems as you say---the grinder has to bog down if you press into the wheel with the item your buffing right??


bill

[gopedhead]

not noticable when i do press down on it, i dont press down lightly either , at least 10 pounds pressure.

[tomg552001]

The reason you probally cant get scratches out are you can't put enough pressure to get a good cut, and from my experience a haze can be caused with lack of speed and power aswell.

[gopedhead]

i think