Hey guys!
Ive been looking for something like these wheels for about 2 hours now to no avail. I just need the wheels and all of them are attacked to something that is $80.
Even if I could find the flat rubber part I could make my own.
Wondering if any of you may be able to find these. Thanks!
Look for o-rings to get the rubber part. Though they aren’t flat, for applications like your pictures they usually sit in a semi circular groove. Like these: 223 Buna-N O-Ring, 50A Durometer, Round, Black, 1-5/8" ID, 1-7/8" OD, 1/8" Width (Pack of 20) https://www.amazon.com/dp/B0051XXHHE/ref=cm_sw_r_cp_apa_pKaNBbFHEFZ9Q
Yea that’s what I was thinking initially. Was wondering how id cut the small groove though.
To cut the groove, my inclination would be to make a fixture to hold the wheels on an axis at the front of the machine w/ a rotary / crank mechanism to turn them — lower the router onto a wheel w/ a suitably sized ball-nosed endmill loaded, turn it one revolution, lower, and repeat.
Alternately, a ball endmill intended for undercuts could make the cut with the wheel clamped flat on the wasteboard:
(when you see the price you’ll understand why I would use the fixture)
Or make a wheel from three small circles, two large, one smaller. Glue them together with the small one in the middle, then apply the o-ring.
Holy crap… Yea that is not cheap. I think Amana tool has something like that but alot cheaper.
This… This is a good idea. Thanks!
Mikes on the money! Although I’d mill it in 2 parts not 3 
@WillAdams
https://www.toolstoday.com/edge-fluting-router-bits.html
What I believe I was thinking about.
Mill the bottom with the lip then cut the flat top and glue?
Thats what I’d do. Chuck in an extra layer and use it as a centre pin.
That way they align nicely when glued.
I’d cut two identical parts, each with an identical relief at the edges, and glue them together using the axel hole for alignment.
Not a bad idea either.
This is why I come here… Ideas I haven’t come up with yet.
Unfortunately those all have 1/2" shafts.
Yea I saw that… They have some more somewhere I just can’t find em. But that’s what I was thinking. Just… $200+ for a bit is crazy (to me) I get they can get expensive
How about a slot cutter with a router. Could use it on the CNC with some creative toolpaths, but probably easier on a table or by hand.
Another idea would be to use some abrasive cord (not sure what it’s called) and spin the wheel on a drill or motor.
How many are you making?
Cut two circles, chamfer with a vbit, glue together, add oring. Simplest way I can think of.
Dan
cut out a circle, and hand file with a small rounded mill. might take a little while…but cheap. 
You might try this site for “rubber bands” for your wheels: https://www.aerorubber.com/all-weather-rubber-bands/
Look at the Ranger Bands - wide, thin, black rubber bands are there.
If you’re looking for rounded rubber bands, try an old Hoover Vacuum cleaner motor band. Take a look at this link: [https://www.espares.co.uk/product/es487944?utm_source=google+shopping&utm_medium=shopping&utm_campaign=google+shopping&mkwid=sGt4jns3i&pcrid=174054713172&kword=&match=&plid=&pdv=c&gclid=CjwKCAjwxILdBRBqEiwAHL2R8yHcoz0i4qNgHzyQp8zNJwaGXFNggbXKpz6NW2g59sv8DZhCYgG70hoC1i8QAvD_BwE](http://Hoover Vacuum Cleaner Motor Bands). These are the nearest that I can think of that look like what you need. 