Thread: Bench grinder set up for minimum vibration

Do the grinding wheels have bushes in them?
Are there rubber mounts on the feet of the Grinder?
Are both the shafts true?
A pic of the grinder would help.


Cheers


Steve

Steve,
As I recall the wheels do have bushes, & again as I recall they look permanent, rather than replaceable or size selectable.
The shafts are running true as determined "by eye" & certainly the "shaft trueness" is not the primary source of my problem.
The grinder base appears to be designed to bolt down & I have it well clamped to my benchtop.
I could post a pic but this is a regular "double ended 8 inch diam bench grinder".
It's definitely not a precision grinder such as you might find in a workshop where tool grinding was a routine requirement.
I believe the wheels would run much better if there was a solid collar incorporated on the shaft, of substantially greater diam than the shaft; but the actual shoulder against which the wheels fit is only proud of the shaft by maybe 3 mm or so. I guess this design keeps the cost down.
I will work on stripping the grinder to take a few measurements & pics.
Thanks for your interest.

Peter O

My 200mm grinder has four rubber feet,I bolted it down but not too hard,just compressed the feet but not down that the base is touching, this stops any vibration transfering into what ever you have your grinder fixed to,helped my

If you dress the wheel and it still gets out of round it may be as said by previous posts that it is not staying true on the shaft,check out the bushes

99.99% of vibration with BENCH GRINDERS , is that the wheels are out of true.

Check the Bushes and ensure that the wheel nuts are tightened firmly , it is always a good idea to check for cracks in the wheels , do this by ,

1 remove the wheels
2 place a pencil through the center hole
3 TAP the wheel lightly with a piece of steel
4 you should hear a clear ring ,
5 if the ring is muffled / flat , the wheel has a crack.
6 if all is well refit wheels.

Buy a diamond dresser, 1/4 carat and true the wheels , you can also use a truing stone or wheel tool, all will clean & true the wheels,

Once the wheels are in dynamic balance there should not be any vibration.

Jeff