[Stick-man]

If anybody has one they would like to give away or sell. I have a 4 1/2" Metabo, and I want to put a 6" guard on it to use slicer disks.

 

[rlitman]

You cannot do that. The 4 1/2" grinder spins too fast for 6" discs. They will shatter.
What you want is a 6" grinder with a small motor.

 

[Oldendum]

Looks like a number of 6" cutoff wheels are rated just over 10,000 RPM.

 

[rlitman]

Looks like a number of 6" cutoff wheels are rated just over 10,000 RPM.

Hummm, you know, you're right. I knew my 41/2" wheels had a rating in the neighborhood of 13kRPM, but I didn't realize the 4 1/2" grinder turned that much slower.

 

[jncaruso]

You can't just look at the rated RPM, you need to look at the Surface feet per minute of the disk at the outer edge.

6" dia disk has a circumference of 18.84"
4 1/2" dia disk has a circumference of 14.14"

 

[TozziWelding]

And so it begins, he was looking for a guard, not the safety police. Just so you know I run 6" whizzer wheels on my 4.5" grinder with no guard and have been for years.

 

[killdozerd11]

And so it begins, he was looking for a guard, not the safety police. Just so you know I run 6" whizzer wheels on my 4.5" grinder with no guard and have been for years.

I was thinking the same thing

 

[lars66]

i have a few 6" Metabo guards laying around.

 

[Stick-man]

You can't just look at the rated RPM, you need to look at the Surface feet per minute of the disk at the outer edge.

6" dia disk has a circumference of 18.84"
4 1/2" dia disk has a circumference of 14.14"

Really? I thought RPM is RPM, Revolutions Per Minute. I have never seen a disk rated at SFPM, or Surface Feet Per Minute. Regardless of what size disk it is, I would think that if that particular disk is rated to spin around at a stated RPM, and you put it on a grinder within the stated RPM, there should be no problem.

And so it begins, he was looking for a guard, not the safety police. Just so you know I run 6" whizzer wheels on my 4.5" grinder with no guard and have been for years.

I have a few times also, but............ you got bigger balls than I do!:laugh: I will if I can't get to it with a guard, but I would like to have a guard for general use. After all, I have a beautiful face to protect!!!:laugh::laugh::laugh:

i have a few 6" Metabo guards laying around.

If you are interested in losing or selling one, PM me, thanks.


BTW, we need a little police man or cop car with mars lights, to add to our smilie collection!!!

 

[weldermike]

And so it begins, he was looking for a guard, not the safety police. Just so you know I run 6" whizzer wheels on my 4.5" grinder with no guard and have been for years.

Iv'e put bigger, so big you would laugh your azz off. And I also put giant cup stones on them, that almost sprain your wrist when you turn them on. Ya gotta do what ya gotta do sometimes :laugh: :drinkup:

 

[irish fixit]

I guess most people haven't been around 6" grinders. Some of them have a free speed of the same 10,000 rpm that his 4 1/2" grinder has. I have one two of them that do. One has been running 6" cut off wheels in it for about 8-9 years now (with a guard most of that time).

As for the guard problem. I've got a Porter Cable 4 1/2" grinder that I made a 6" guard for to run the cut off wheels in. I keep it in my truck. I would take a picture but unfortunately my help took my truck home tonight (the truck he's driving has the rear wheels off waiting for brake parts in the morning).

 

[docwelder]

And so it begins, he was looking for a guard, not the safety police. Just so you know I run 6" whizzer wheels on my 4.5" grinder with no guard and have been for years.

i had to laff when i read that. you're right, the hits just keep on comin'. lol i bet this thread takes on a life of it's own regarding safety. gotta love our well meaning brothers though.