Thread: Building your own grinder: cheap and easy

Hello...
I saw this tread a few days ago and decided to make my own grinder when I go home next week...
I saw this kind of wet grinder here in Croatia for some 90 kn (around 18$)...
I was thinking of leaving the water tank and gluing the strip of rubber on the stone with some kind of waterproof glue or epoxy... Then I would make rings out of wet sandpaper and slip them on the rubber...
This way the water would remove the steel particles from the sandpaper and water could also cool the steel while grinding...
I would also install something to be able to vary the motor speed...
What do you think?
Could it work that way?
Thanks...

I guess you'd have to try it & see. Not sure if you get long lengths of wet & dry paper there, but i've not seen it here. If you need more than one join i'd try something else.
Although it's designed to be used wet, you may find that with the stresses that this exerts on the paper, it may simply shred it. If it does, you could always lose the resevoir.
You may also find that the method required to keep wet paper attached to the wheel means that it's just not practical when changing paper.
Try it & report back!

This is an interesting site. He has some good ideas about attaching the sandpaper.

on page 3

Charlie

I will report back with pictures/videos at the end of the next week...
I have some ideas how to keep the paper on...
Will see how it works...

Originally Posted by spazola

This is an interesting site. He has some good ideas about attaching the sandpaper.

on page 3

Charlie

Thanks Charlie! That confirms the longevity of the MDF board. The Talcum powder idea is going to be very useful.

Now I just have to setup my variable speed DC motor to an arbor.

Life just keeps on getting better,

Bruno-thanks alot for this idea.I would never have thought of this myself but have used your work here to make my first wooden wheel with 400grit wet & dry attached on my 1/2 HP bench grinder.
it works a treat for pre polish and I can't wait to try it with higher grits.


Cheers John

I want to make one of these.The idea of using a wet grinder is cool because of the low RPM so it is harder to over heat what you are grinding.
Slawman

The Idea of variable speed and reverse using scrap or disposable items at hand I like alot, so I wanted to tell you guys that I have built a few grinders, two of which use the motor and variable speed clutch from a Tread mill, never have I bought one, both were given to me to haul away, they both worked like new, the shafts and bearings have been helpful in building knife making grinders, but those are another story.

To me Parts is parts and I too have wanted to use the digital motor from a front loader washing machine, boy, those turn up some RPM!!!