How to : Ring Test a Bench Grinder Wheel

[woodstockva]

Hey guys....I just made a quick video showing how to "ring test" a bench grinding wheel.

This is a simple test that you can do in about 1 minute, and will tell you if your grinding wheel is safe to use, or if it needs to be replaced due to hidden cracks.

All you need are two screwdrivers & a grinding wheel to test.

Grinding wheels can literally "explode" if they are cracked, and you turn on your grinder.....save yourself, test your wheels.

Check it out & let me know what you think.

Thanks!

www.youtube.com/watch?v=NDtL4gisZYo

 

[rice rocket]

Sweet Knipex hat!

 

[Rated ///M]

Good video! Thanks for the Public Safety Tip!

 

[uniballer]

 

[kb1luo]

Thank You!! I did know this and had forgotten that tip over the years.

 

[JZHeyde]

Great video. Going to pass this around at our different offices so everyone can be safe.

Thank you.

 

[Kevin54]

Great video, and great that you posted it up. In all of my years around machines, I have witnessed many stones explode, and as you said, they send stuff flying everywhere.

Although a bench grinder can be bad enough, a surface grinder runs at a lot higher RPM's, and if you don't ring test them, it can e very tragic.

Thank you again, for posting this!!!!!!!!!!

 

[dankicksass]

Does this test work with the stone installed?

 

[woodstockva]

Thanks for the compliments everyone! I am glad that you picked up a tip that will make your garages/shops are much safer place to work.

Does this test work with the stone installed?

Nope. You must remove the stone from the grinder prior to testing.

Here are the directions from Norton Abrasives ---

http://www.nortonindustrial.com/upl...ents/Safety - Ring Test a Grinding Wheels.pdf

 

[MBfreak]

Great video, works well for smaller grinding wheels.
In 1961 when I was 15 I had a summer job at a big machine shop, and was an assistant to the specialist guy making adjustments and repairs on a variety of machines.
The had HUGE grinding machines, the grinding wheels weighed several 10s of kilos.

When installing a new one, it would first be immersed in a water bath for several hours and then installed. An "explosion protection " steel sheet was mounted and the grinder was started and brought to max rpm for that grinding wheel and let to run for at least 30 minutes.

I was told that if it was going to shoout out projectiles or even disintegrate , the added weight from the water would immediately show up any hidden defects.

Never happened during the 3 months I was there.

Ola

 

[red92s]

I briefly worked with some ELB creep feed grinders, that had spindles with about 75 HP. If you didn't "spin the wheel out" with no coolant when shutting down the machines, the wheels would be imbalanced the next morning. You could feel the vibrations in the front offices if that happened.

Those wheels got pretty frequent inspections.

 

[softailgarage]

never had a clue, thanks

 

[Engine]

Thanks for posting this. I know bench grinders are potentially very dangerous tools. I didn't know exactly what they were supposed to sound like when bad/good.

 

[sc3013]

Also after ring testing and mounting, on start up , step to the side. You should always step out of the line of fire anytime you start a grinder.

 

[EOC_Jason]

Learn something new every day. Also watched the video from Desmond Stephan on how to dress your grinder.

 

[bbrins]

I just had one explode on me the other day, no injuries fortunately, might have been worse if I hadn't been wearing a heavy duty jacket, leather gloves and safety glasses, I could hear chunks of the wheel hitting things all over my workshop. The wheels on that grinder were probably ten years old and only lightly used, the problem is that I am always moving the grinder around the shop to get it out of the way, I must have bumped that wheel on something last time I moved it. I'm going to remove the new wheels and do the ring test on them before I use the grinder again. Thanks for the tip.

 

[mister z]

I try to learn something new everyday and I did there. Thanks!