EERF grinder and belt sizes ?

W

wack

Joined
Dec 24, 2005
Messages
73
Hi guy, I'm starting a EERF grinder build . I have the plans at the laser cutters at the moment , to be cut out of 12mm plate because that's the closest we have in metric here.

I plan on running a multi plattern with 4 inch and 8 inch wheels. I have added the multiple spaces similar to the grinder in a box to allow for a work rest .But there maybe other differences apart from the idler arm being 2 inches higher.

The motor will be 2hp one with a 6 inch drive wheel to allow for the 50hz power we have here, that will only spin the 2hp motor to 2850rpm. I also plan on running a vfd that will run up to 130% or as low as 50%.

So does any one know if a 1520mm (59.8 inch) belt will run on such a setup or if 2440mm (96inch) belt would be way too big realistically?
I can get custom belts made if needed with a 2 week turnaround.

Any improvements or concerns would be appreciated.

Thank you for you time guys - Wayne
 
1520mm will be too 50mm by 1825mm (2X72") is the industry standard in most places, but 2440mm will work fine. You may have to make the tool arm 100mm longer.
 
Thanks bladsmth , I thought the 59 odd inch might have been a little small. 72 inch belts seem to be realy only in 3 and 4 inch wide down here.

When I get it built I might try to get a used 2440mm belt off the 3M rep that stops by work and see how it goes. At about $10 a belt for zirc , in the 12 packs we get X 3 or 4 grits , a coppla hundered bux in belts are going to last this hobby maker a fair while.

It looks like it should grind alot better than the 2 x 36 inch multitool that I have been useing in my last copple of knives.:D

lastly I would like to thank Polar Bear Forge and Wilmont Grinders for making this posible, thanks guys .... pic's to come yet :D
 
wack said:
Thanks bladsmth , I thought the 59 odd inch might have been a little small. 72 inch belts seem to be realy only in 3 and 4 inch wide down here.

When I get it built I might try to get a used 2440mm belt off the 3M rep that stops by work and see how it goes. At about $10 a belt for zirc , in the 12 packs we get X 3 or 4 grits , a coppla hundered bux in belts are going to last this hobby maker a fair while.

It looks like it should grind alot better than the 2 x 36 inch multitool that I have been useing in my last copple of knives.:D

lastly I would like to thank Polar Bear Forge and Wilmont Grinders for making this posible, thanks guys .... pic's to come yet :D
Click to expand...

If you can get a 4 x 72" belt easily cheaply, locally and in they types and grits you want, you can easily split them into 2" widths, or less.

Some makers split into 1 or 1/2 or 3/4" belts to do tighter radi.

Tracy sells a belt splitter, but I'm sure you could knock something together with wood bits and razor blades.
http://www.usaknifemaker.com/belt-splitter-2-to-1-p-2547.html
 
Last edited:
Also, remember that 2X96 belts are not more expensive. You get 33% more belt for 33% more cost. The $10.00 96" belt is equivalent with a $7.50 72" belt.
 
Wack
While you could easily put a 96" belt on your EERF It would make the grinder too front heavy and make the arm holding your contact wheel much too long IMO.
I would instead make part 2 taller to compensate. If needed I can easily make it longer for you and send you a DXF file. We can make it taller and still have the original hole in it so you can try the old height and then the new one.
Chris W.
assem11.jpg
 
blindhogg said:
...If needed I can easily make it longer for you and send you a DXF file. We can make it taller and still have the original hole in it so you can try the old height and then the new one.
Click to expand...
How cool is that? Well offered Chris!
 
Hi guys , sorry the time delay here makes these conversations a pain.

Thanks for the heads up on the belt splitters.
I've had 2 unsplit ceramic belts go off on me in the last month at work, so the ideas got me a little nervous. Even that I know that its completely safe there's that nagging voice in my head .

Wow, Jamie, thanks for the offer of the new file . The grinders almost back from the laser cutters so it wouldn't do me any good . I'm a boilermaker so I was going to cut another of part #2 by hand and stretch it roughly 6 or 8 inches higher from the bottom of the part . Trigonometry wasn't my strong point at tafe but it should be close? Either that or make a Z shaped splice plate to raise the original to use all the same parts and holes to get it in the ball park. My only other thought was to maby incorporate a part #4 to add strength because it would be 16 / 18 inches tall?

The knife community constantly amazes me with all the help that comes from people that you have never met. I really mean that , thanks guys.

- Wayne
 
you should talk to matt brook hes making the same grinder he might be able to tell you where to get belts in aus cheap
 
Thanks DamienC , I'll look hom up tonight . Google must have missed him when I was looking for EERF in Australia
 
You must log in or register to reply here.
Back
Top