Safe to install an angle grinder cut off wheel on a bench grinder?

[The Cobbler]

as per title. any issues? I am going to be fabricating some cabinet door hinges for a friend to match an existing profile that's probably not available . I will be starting with 4" **** hinges and doing some grinding , welding , drilling & tweaking . some of the detail is very fine , a cut off wheel would help a lot but in an angle grinder I won't have the stability that a bench grinder would have.
any issues ? I guess RPM is the major concern ... what's a typical RPM of a bench grinder vs an angle grinder?
edit, got my answer on RPM. any other issues?

 

[PCustoms]

Don't side load the cutoff wheel.

I'd be very leary of having my hands that close to everything, one wrong move and the metal is across the room and you're looking for a finger.

Buy some different hinges

 

[alwaysFlOoReD]

Full face shield and neck protection.

 

[iagsxr]

I mean, since I know a guy who had half his face ripped open by a cutoff wheel through a face shield and his nose and sinuses are still all jacked up, I'd say go for it.

Ot since it's the GJ way to buy more tools, buy a Swag table for your portaband or use your bandsaw in the vertical position. You may still be looking for a finger, but your face will be ok.

 

[mike93lx]

I wouldnt do it and I've done some sketchy ****

 

[RoninB4]

-There are abrasive cut-off wheels that are regularly used in surface grinders. Several different compositions and thicknesses. If the center hole (several diameters) are close enough I'd say they'll hold up (no side loading). Surface grinders (and tool grinders) are higher RPM's than any hand held or bench grinder. Check with an industrial supply house for better prices/quality, use a coarse dressing stick (stone) to keep the wheel unclogged. Use a paper blotter on either side of the wheel so metal (hub/nut/spacer) doesn't contact the abrasive wheel. I've been using them for decades in surface grinders on almost a daily basis.

 

[PCustoms]

I wouldnt do it and I've done some sketchy ****

I'm picturing the OP using it like a giant key grinder.


Nope.

 

[jsaw]

A bench grinder does not spin fast enough. Depending on the size. 3 or4 inch Cutoff wheels are designed to run 15,000 -20,000 rpm. 7" Wheels designed to be used on an angIe grinder are meant to be run around 6,000 rpm. In my experience, they also wear down too quickly when run too slow.

 

[MichaelP]

May I suggest using a cut off tool instead? Much more control over the cutting disk than provided by either an angle or die grinder. I have this one:

 

[john.k]

I used to use the worn 14 '' chop saw discs on my 7' Atlas Copco air grinder .......wear down to 5 and discard ,as they would break at 5........one day the boss came over checking what I was doing safety wise........just my luck the disc should break and a piece hit him......he had a thick wool sweater on ,so no damage.

 

[welder4956]

OP needs an angle grinder bench stand to hold the grinder steady. Don't miss an opportunity to buy a new tool! Or make your own and bolt it to the side handle holes.
https://tomtomsshop.com/products/angle-grinder-kit

 

[Rccrawlerguy]

 

[sqznby]

If you have an arbor to hold that thin of a blade on your bench grinder sure, and you let the tool do the work, I don't see a problem with it.
If you do stupid things then stupid things will happen.

 

[Garage Junkie]

For the kind of work you want to do, I would reach for one of my die grinders and switch between carbide burrs, cut off wheels or sanding disks...

 

[john.k]

My neighbours always used 14'' discs in a 9'' angle grinder ,no guard of course.

 

[zimman]

I would not. I've successfully launched a few disk into walls, ceilings, and interiors of cars. Having one at your waste and the possibility of sending one into your nuts is alarming. LOL
This is my favorite tool for this type of fabrication.
Zim

 

[pcrov]

McMaster has the answer: https://www.mcmaster.com/products/cutoff-wheels/for-use-with~bench-grinders/

 

[Beerhippie]

Angle grinders run at 12-16,000 rpm. Bench grinders (not variable speed) (generally) at either 1750 or 3600 rpm.

Side-loading the wheel would be my biggest worry. Very slow cutting with lots of heat would be another.

You need a metal-cutting bandsaw or scroll saw.

 

[mark-NJ]

May I mention: The arbor size on a bench grinder isn't the same as the hole on a cutoff disc. This isn't going to work...

 

[mike93lx]

May I mention: The arbor size on a bench grinder isn't the same as the hole on a cutoff disc. This isn't going to work...

That's why step bits exist

 

[whateg01]

May I mention: The arbor size on a bench grinder isn't the same as the hole on a cutoff disc. This isn't going to work...

My lathe would make it work!

 

[four.cycle]

I wouldnt do it and I've done some sketchy ****

I just opened up this thread.
Just gives me the heebie-jeebies thinking about it.
You're not really seriously considering doing this, right?

 

[john.k]

Fibre reinforced wheels are fibre reinforced for reason ........conventional grinding wheels are not fibre reinforced .

 

[mike93lx]

Fibre reinforced wheels are fibre reinforced for reason ........conventional grinding wheels are not fibre reinforced .

Apples and oranges

 

[four.cycle]

^ Somebody has apparently never watched pieces of cut-off wheel attempting to go into orbit.

 

[whateg01]

^ Somebody has apparently never watched pieces of cut-off wheel attempting to go into orbit.

I hear it only happens to ancient black and Decker wheels

 

[Etchase]

Cut off blades work great in table saws. I don’t see an issue on a grinder. They are all fiber reinforced at this point right? Grinding wheels explode.

 

[Ultradog MN]

Double post

 

[PCustoms]

I have do

???

 

[Ultradog MN]

Some folks can't get things done because they're uncreative or afraid.
I use an ordinary 4 1/2" angle grinder and clamp it in the vise. Use my leather welding gloves to pad and grip the grinder better.
As was said above, a bench grinder spins  WAY too slow to be effective. Like 1750 vs 11,000 rpm.

 

[mike93lx]

Some folks can't get things done because they're uncreative or afraid.
I use an ordinary 4 1/2" angle grinder and clamp it in the vise. Use my leather welding gloves to pad and grip the grinder better.
As was said above, a bench grinder spins  WAY too slow to be effective. Like 1750 vs 11,000 rpm.

Afraid?!? You are the one that still has a guard on his grinder

 

[PCustoms]

Some folks can't get things done because they're uncreative or afraid.

 

[PCustoms]

Afraid?!? You are the one that still has a guard on his grinder

Speaking o this, do they make a depressed center cutoff wheel?

Grabbed my cheap grinder yesterday to cut some wire mesh and remembered the wheels hit the guard. Made the cut and threw it back in the drawer to forget about until next time.

The other one has been designated for cutting brick/stone, diamond blade and no guard

 

[Ultradog MN]

Afraid?!? You are the one that still has a guard on his grinder

You got me there
That's my new one and I've never used it yet.

 

[mike93lx]

You got me there
That's my new one and I've never used it yet.

That's better!

 

[mike93lx]

Speaking o this, do they make a depressed center cutoff wheel?

Grabbed my cheap grinder yesterday to cut some wire mesh and remembered the wheels hit the guard. Made the cut and threw it back in the drawer to forget about until next time.

The other one has been designated for cutting brick/stone, diamond blade and no guard

 

[PCustoms]

Thanks, somehow have never encountered those in the wild.

Usually use my Milwaukee for any extended work (less vibration) and never had a issue with a normal wheel, but had picked up 2 porter cable really cheap years ago to abuse/have a spare. Runs a flap disc, cup wheel etc. fine but apparently needs goofy cutoff wheels

 

[john.k]

I used to use up the worn 14'' chopsaw discs in a 7'' Atlas Copco air grinder ......direct drive air motor to wheel mount .......nice thing about the air grinder it would stop almost immediately when you released the trigger

 

[johnre]

Don't do this.

There are proper tools for the job that mount much smaller and finer cutting bits that are better suited to the job - and, incidentally, much safer in this application.

Check out Foredom rotary shaft tools.