Motorized Mill build

[uSlackr]

I'm trying to build a version of the mill from this article and I'm having an issue with the drive mechanism. I have 1/2 nipple from the drive and a 3/8" shaft on the mill. No matter how tight I get the hose clamp as soon as grain hits the mill, it slips. I've considered grinding two flat spots in the mill shaft but I'm not convinced that will work.
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Ideas welcome.

 

[gromitdj]

You could try cutting a V in the tubing so that you can tighten the clamp without having to compress as much of the tubing material. I would assume the reinforced tubing is providing quite a bit of resistance to the clamping force.

 

[uSlackr]

You could try cutting a V in the tubing so that you can tighten the clamp without having to compress as much of the tubing material. I would assume the reinforced tubing is providing quite a bit of resistance to the clamping force.

Thanks. It's not visible here, but I did that on the mill side. Seems as though the smooth shaft and vinyl tubing don't provide enough friction.

 

[gromitdj]

Perhaps building up the diameter of the mill shaft with some duct tape will be enough to keep it from slipping....

 

[auburntsts]

Just bite the bullet and buy a spider coupling

 

[Drumminguy81]

This is what you need. They are cheap can be found for around $10 a set. Lovejoy is the common manufacture brand but there are cheaper versions. I would sell you these that I'm not using but they are 1/2" and 5/8".. I think I paid $30 for all of them..

 

[verboten]

that should do it



https://www.ebay.com/p/CNC-Stepper-...7%26rvr_ts%3Dd7fe22781660aa4728c2a03cfff563e8

 

[uSlackr]

This is what you need. They are cheap can be found for around $10 a set. Lovejoy is the common manufacture brand but there are cheaper versions. I would sell you these that I'm not using but they are 1/2" and 5/8".. I think I paid $30 for all of them..View attachment 595910

Thanks. I’m not sure I know enough to buy one. Is it just the shaft size for the two ends? Any particular connector type? Just the basic one?

 

[Drumminguy81]

Shaft size is all you need. The link verboten posted is exactly what you need. Correct sizes and all.

 

[uSlackr]

Shaft size is all you need. The link verboten posted is exactly what you need. Correct sizes and all.

Excellent - thank you.

 

[MKE Home Brewer]

These uxcell couplers work nicely

Available on Amazon http://a.co/d/8JLmQHC