Grain mill shaft and lovejoy couplings - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > DIY Projects > Grain mill shaft and lovejoy couplings

Reply
 
Thread Tools
Old 07-12-2014, 09:26 PM   #1
Smellyglove
Recipes 
 
May 2013
Posts: 861
Liked 63 Times on 61 Posts



I'm looking into motorizing my mill. First brew with the new mill (MM3 2.0) consisted of 90 minutes of grinding for a 10gal batch...

I slaughtered a kitchen-appliance and took out the motor and gears.

After doing some research here i understood that lovejoys are the way to go. I've read some build-threads but I'm missing one thing.

It seems like the lovejoys have a hole on their side. Does this mean I have to drill a hole in the shaft of the grainmill, and use some sort of locking pin through it?

 
Reply With Quote
Old 07-12-2014, 10:10 PM   #2
Chrisl77
Recipes 
 
Mar 2011
Jackson, New Jersey
Posts: 888
Liked 86 Times on 68 Posts


The hole on the side has a set screw in it. you put it onto the shaft then tighten it down. If your mill shaft has a flat side you line the flat side up with that screw.
__________________
Ocean County home brew club

 
Reply With Quote
Old 07-12-2014, 10:24 PM   #3
Smellyglove
Recipes 
 
May 2013
Posts: 861
Liked 63 Times on 61 Posts


Quote:
Originally Posted by Chrisl77 View Post
The hole on the side has a set screw in it. you put it onto the shaft then tighten it down. If your mill shaft has a flat side you line the flat side up with that screw.
Aha! Excellent. Thanks!

But a lovejoy will work no problem with a shaft which has three flat grooves, for a drill-chuck?

And. How snug must it be to work? The gear-shaft is in mm. It's 12mm. 1/2" is 12.7mm. 0.7mm is 0.0275591 inches. Will it work?

 
Reply With Quote
Old 07-12-2014, 11:51 PM   #4
reynolds5520
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Jan 2010
Western Fingerlakes NY
Posts: 294
Liked 42 Times on 32 Posts


Quote:
Originally Posted by Smellyglove View Post
But a lovejoy will work no problem with a shaft which has three flat grooves, for a drill-chuck?
Some folks file a little bit wider flat on one of the sides so the screw has more area to bite. But yes, they work with that style shaft.


Quote:
Originally Posted by Smellyglove View Post
And. How snug must it be to work? The gear-shaft is in mm. It's 12mm. 1/2" is 12.7mm. 0.7mm is 0.0275591 inches. Will it work?
That's the really cool thing about spider couplings like the ones from Lovejoy, they're available in lots of different shaft sizes, including metric! Just get one that's 12mm. They don't have to be the same size on both halves. The halves just have to be from the same series so the center spider fits with both sides.

 
Reply With Quote
Old 07-12-2014, 11:56 PM   #5
Smellyglove
Recipes 
 
May 2013
Posts: 861
Liked 63 Times on 61 Posts


Quote:
Originally Posted by reynolds5520 View Post
Some folks file a little bit wider flat on one of the sides so the screw has more area to bite. But yes, they work with that style shaft.




That's the really cool thing about spider couplings like the ones from Lovejoy, they're available in lots of different shaft sizes, including metric! Just get one that's 12mm. They don't have to be the same size on both halves. The halves just have to be from the same series so the center spider fits with both sides.
Allright. I allready see myself grinding more than 5 grains at a time!

Guess I'll have to do some more searching then, the reason I asked was because I couln't find 12mm.

 
Reply With Quote
Old 07-13-2014, 12:07 AM   #6
reynolds5520
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Jan 2010
Western Fingerlakes NY
Posts: 294
Liked 42 Times on 32 Posts


Mcmaster Carr has them:

http://www.mcmaster.com/#6408k11/=st78h2

 
Reply With Quote
Old 07-13-2014, 12:23 AM   #7
Smellyglove
Recipes 
 
May 2013
Posts: 861
Liked 63 Times on 61 Posts


And one final Q.

Will I be fine even if the gear-shaft has grooves in it? I don't know how to describe it (And I'm off work, hence no (camera)phone) but, sort of threads, just that they don't twist. They were there to keep the plastic I removed to stick. I can shave down an area to make the locking-screw to make a good contact. I just don't know if it's the screw which is the key element to making the lovejoy not to slip.

 
Reply With Quote
Old 07-13-2014, 01:36 AM   #8
day_trippr
Recipes 
 
May 2011
Stow, MA
Posts: 17,209
Liked 2939 Times on 2195 Posts


The locking screw is the only thing that's going to keep the coupler from slipping. Your motor output shaft is splined, but you could file a flat for the screw. As long as the coupler doesn't slip or wobble you should be ok...

Cheers!

 
Reply With Quote
Old 07-13-2014, 08:24 AM   #9
Smellyglove
Recipes 
 
May 2013
Posts: 861
Liked 63 Times on 61 Posts


Thanks!

 
Reply With Quote
Old 07-13-2014, 05:07 PM   #10
reynolds5520
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Jan 2010
Western Fingerlakes NY
Posts: 294
Liked 42 Times on 32 Posts


How many splines are on that shaft?

Lovejoy has a jaw for a 12mm shaft with four 1.8mm splines.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to affix cordless drill chuck to grain mill shaft? SpeedYellow Equipment/Sanitation 4 07-20-2013 08:35 PM
Monster Mill mm-3 drive shaft wear kds1398 Equipment/Sanitation 20 10-14-2012 11:07 PM
Motorized Grain Mill shaft support cpatel479 DIY Projects 2 05-18-2012 06:56 PM
Need Shaft Coupling to make motorized mill Willie3 DIY Projects 2 12-29-2011 05:46 AM
Motorized Grain Mill - Drive Shaft Questions kevmo DIY Projects 7 12-01-2011 04:38 PM


Forum Jump