Flexible motor coupling

[Bob Engelhardt]

Anybody build a flexible motor coupling like this: https://www.youtube.com/watch?v=Mngpvll5wzo&t=792s
Edit: that's supposed to start at 13:12, but doesn't, so you'll have to manually skip ahead.

It's simplicity is very appealing. IIRC, Donn DIY has used this design in a couple of other projects, so it probably has some robust-ness.

I can wing it with my typical That-Looks-About-Right approach, but if somebody has experience with it, I would appreciate their comments

[Noitoen]

That should be mounted to a bit of sidewall from a car tire in a cross way. This would make it flexible.

[Noitoen]

My jeep uses this on the steering column.

[Arcane]

The ubiquitous rag joint found in so many vehicles' steering shafts.

[Bob Engelhardt]

My jeep uses this on the steering column.

Thanks! Once again, it's all a matter of the search terms. "Flexible motor coupling" got me nowhere.

It's good to see that the concept is sound & that the real-world version is not much more complicated (it does have bushings between the bolts and the disk).

[Doozer]

Rag joint?
This is the most hack azz video build I have ever seen.
Does he ever measure anything even ?

-D

[Noitoen]

The ubiquitous rag joint found in so many vehicles' steering shafts.

Mine is visibly made from a piece of sidewall rag with rubber 😂

[wierdscience]

Yep, rag joint, as mentioned they show up in steering columns and also some drivelines.

Dodge Paraflex couplings use the same principle, just a more refined approach-

https://www.baldor.com/mvc/DownloadCenter/Files/MN4027

[Bob Engelhardt]

... Dodge Paraflex couplings use the same principle, just a more refined approach- ...

I like that design - seems inherently more flexible. You could do motor-coupling size with 1/8 scale RC tires. They might not be strong enough, though.

[Black Forest]

This is my temporary motor coupler that I haven't actually felt the need to upgrade. For the amount of torque I need for this machine it works perfect and is silent.

https://youtu.be/GRNcpdekMWs

[J Tiers]

A piece of conveyor belting works well also.

[wierdscience]

I like that design - seems inherently more flexible. You could do motor-coupling size with 1/8 scale RC tires. They might not be strong enough, though.

I saw a Vietnamese Oyster fisherman use a riding lawn mower tire and rim mounted on his engine pto shaft . This was slipped inside of a truck brake drum that was mounted to his winch gearbox. Inflating the tire completed the coupling and varying the tire pressure provided adjustable load limiting. Fishermen, like farmers are some creative people

[wierdscience]

This is my temporary motor coupler that I haven't actually felt the need to upgrade. For the amount of torque I need for this machine it works perfect and is silent.
https://youtu.be/GRNcpdekMWs

Bought ones of those cost a pretty penny and don't work a bit better, well done!

[Bob Engelhardt]

This is my temporary motor coupler that I haven't actually felt the need to upgrade. For the amount of torque I need for this machine it works perfect and is silent.
https://youtu.be/GRNcpdekMWs

I like it. It looks like it would handle at lot of angular mismatch & some axial displacement too.

[Noitoen]

They are called Type K couplings

https://images.app.goo.gl/4tqcezYEhW9kuDfo8