Opposite of V-Groove Wheel?

LGSwensen · May 18, 2018

HI, I'm designing something that needs the opposite of a V-Groove wheel profile. I am having trouble finding out the name of this wheel profiled. I'm okay having custom wheels made if this is not actually a thing, but if someone already makes them then that's less work I have to do. Anyone know if this wheel profile has a name?

sfriedberg · May 18, 2018

I don't have a better search term than "V wheel", but that pulls up a lot of stuff, including V-groove wheels.

But here's a product that looks a lot like your drawing. Apparently OpenBuilds makes them for home-built CNC gantries for use with extrusions and they are sold all over the place as "solid V wheel".

If you can't find what you need, you can always machine your own and press them on to standard bearings. Or start with a cheap conveyor wheel or urethane molded bearing and grind/machine the corners off.

And, depending on your requirements, you might be able to run off the outside surfaces of a conventional V-groove wheel, as almost all of them have slanted outer-most, as well as inner-most, surfaces.

metalmagpie · May 18, 2018

In a milling cutter they'd call that "double angle" or maybe "double bevel".

SAG 180 · May 18, 2018

Wouldn't wheels with that profile be unstable and constantly riding up the sides of the groove they run in?. You might be better off with something similar to train tracks. I see the link sfriedberg provided relies on opposing grooves and wheels to work.

Limy Sami · May 18, 2018

I don't know what you're designing, but I know from experience (not my design) that wheels of that shape running on a track of that shape are a nightmare for trapping dirt and debris, which can cause more problems and grief than a man deserves.

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