Summer Project #10: The Brand-New Belt Grinder, Completed!

Joined: October 11th, 2014, 3:36 am

June 10th, 2018, 4:19 pm #21

With all that open space below, I can see many opportunities for add-on.  Of course the drawers for storage will be a primary installation.  But I was thinking as well as for dust control.  It would not take much to make a simple cyclonic dust collection system with either a hook-up to your regular shop vacuum, or a dedicated blower.  Which could also be used as a dust collector for you other grinders perhaps?
Quote
Like
Share

Joined: January 1st, 1970, 12:00 am

June 11th, 2018, 8:57 pm #22

I'd considered that idea- basically just mounting a Shop-Vac under there- but the dust control thing is going to be an issue in and of itself, so I think the space will be better spent storing tools and accessories for the grinder itself.

I already have two tool arms- the square wheel and the 8" wheel- and I'll have the 4" wheel before too long, as well as a 10" wheel at some point. I'll need some way to properly store the other three when they're not being used, as well as at least one other tool-rest arm.

So I've been working up ideas on how to build a fairly secure "rack" to store them, so they don't all fall out when I tilt the machine to move it.

Doc.
Quote
Like
Share

Joined: October 11th, 2014, 3:36 am

June 11th, 2018, 11:07 pm #23

Two options: both would be a drawer of type.  The inside system would be the variable either way.  The first would consist of a flat drawer, with a series of dowels (wood or polymer would minimize any damage to the wheels) that the wheels sit on.  The second option would be a drawer with more depth since the wheels would sit in a simple pocket for each wheel.
Quote
Like
Share

Joined: January 1st, 1970, 12:00 am

Today, 8:07 am #24

As I mentioned earlier, a couple of years ago, I got a 4" contact wheel from a Guild regular, although I have to admit I can't honestly recall if he gave it to me, which i think is the case, or if I bought or traded for it. I do a lot of buying and trading like that, and to that Guilder, thank you either way. :)

Anyway, this one mounts a little different from the others, as it has this "axle" sticking out to one side. The end is threaded for a bolt, and I suspect you're just suppose to drill a hole in the mounting arm and run a bolt through. I didn't like that, as it seemed awfully flimsy. It'd probably be fine for a knifemaker who doesn't put a great deal of pressure on his blades, but for my general-use needs, I wanted something stronger.



Checking it against the existing belts (note the witness marks on the tool rest) I find out it needs basically exactly one in of offset.



Rooting through the remnant pile and a bit of bandsaw work gets me these- a chunk of 1"x1-1/2", the 1-1/2" square tooling arm, and both pieces cut off at 45 degrees.



Why cut them off at 45 degrees? 'Cause that's how I roll. Any idiot can leave it square. :)

Anyway, after a quick check for clearances, I drilled, tapped and countersunk (not in that order) a 3/8"-16" hole in the end of the smaller piece.



And then drilled a slightly-less-than-5/8" hole where the axle will go.



Put the grinder back together with the other wheel and dress it up a bit...



Then TIG weld the two parts together.



Now, the reason for the undersized axle hole: I wasn't sure how square I could keep everything as I welded it, or what sort of distortion I might wind up with, so once it was fully welded and allowed to fully cool, i squared it up in the mill and bored the hole with an endmill.



A quick test-fit, and it works just fine.



And as a last step, a light cut in the bandsaw opens up a pinch slot to the axle hole.



Tap the wheel into place, eyeball an alignment, and tighten the pinch bolt. Holds solid as a rock.



Et Voila`! It's just that easy.



This one, too, tracks perfectly with the same tracking wheel setting as the other two so I'm happy. :) That gives me a 4" wheel, an 8" wheel, and the "square wheel"- and, one of the idlers on the square wheel is rubber-covered, so technically I have a 2" contact wheel as well. I think that all should serve me pretty well for the time being, though I'll likely eventually end up with either a 10" or a 12" wheel as well, maybe both.

Doc.
Quote
Like
Share