Thread: Prrraolishing leaving black residue on everything...

Smaller wheels are a great idea

Originally Posted by Dafonz6987

Actually that's really crazy I watch the wheel turn black on when I'm buffing the pins... Are u not supposed to or something?

If you want to keep your mop clean buff around the pins.

Originally Posted by Euclid440

A 6 in wheel is generating too much speed and heat and not letting your compound work, 3 or 4 in will work better, brake cleaner or WD40, sprayed on a paper towel will get it off, Brake Cleaner can damage some plastics and finishes.

The minute you see black, rake your wheels.

Forgive my potential ignorance but wouldn't the speed of travel of the outside edge of a smaller wheel be greater than that of a larger wheel?

Edit: assuming the spindle RPM is the same.

Originally Posted by edhewitt

Forgive my potential ignorance but wouldn't the speed of travel of the outside edge of a smaller wheel be greater than that of a larger wheel?

Hi, Ed! ...........No.

Bruce

Originally Posted by sharptonn

Hi, Ed! ...........No.

Um, you can get in trouble for answering a yes or no question with a yes or no.
Trust me on this.

Ed, it's all in the RPMs.

If you have something spinning at 1800 RPMs with a 3 inch diameter, then the circumference of the wheel is 9.4 inches so in one minute a point on the outside of the wheel has traveled 9.4X1800 inches.

If the wheel is 6 inches in diameter, then the circumference of the wheel is 18.8 inches that same point on the outside of the wheel will travel 18.8x1800 inches in one minute.

THAT! What HE said! ^

Bruce

Originally Posted by sharptonn

Hi, Ed! ...........No.

Bruce

Laconically correct

Think of putting much bigger tyres on the car. You could go faster, yet take more power to get up to speed.
Hence, more speed. Eventually. Torque is done. Any load upon it slows it down.

Or, put smaller tyres on. Car jumps off good, yet is much slower on top-end at the same engine speed. Plenty torque left. Stays constant under use.

For buffing, some guts are not so much important as slowing down the wheels on a high-speed grinder motor.
Slowing them down with the smaller wheels is desirable. I am pretty certain?

Bruce

Sorry you are quite right. Coming off of night shift mucks up my brain.
I should have remembered what a mechanic told me:
If I put bigger wheels on my car it will achieve a higher top speed but will take longer to accelerate. And the inverse for smaller wheels.

Originally Posted by sharptonn

Think of putting much bigger tyres on the car. You could go faster, yet take more power to get up to speed.
Hence, more speed. Eventually

Or, put smaller tyres on. Car jumps off good, yet is much slower on top-end at the same engine speed.

For buffing, some guts are not so much important as slowing down the wheels on a high-speed grinder motor.
Slowing them down with the smaller wheels is desirable. I am pretty certain?

Bruce

I think you must have posted this whilst I was typing my last post. Weird that we both chose the same comparison