Electric/wiring grain mill help

[FloppyKnockers]

I have a mill that does a good job. It's just too slow in my opinion. It's got a direct drive motor that can go 1400 rpm (so says the sticker on the motor), but instead goes ~70 rpm. I took the electric box apart and found this little guy.

No idea what all this means, but I'm sure it's what is responsible for slowing the motor. It's got two wires going in/out of it so I could easily bypass it, but that means it'll go at the full potential of 1400.

So the question is: What do I replace it with to speed it up to closer to 200 rpm?

Thanks in advance.

 

[FloppyKnockers]

More research suggests that this is a ceiling fan capacitor. This does not clear things up.

 

[Wayne1]

It is a motor start capacitor:

Start capacitors briefly increase motor starting torque and allow a motor to be cycled on and off rapidly. A start capacitor stays in the circuit long enough to rapidly bring the motor up to a predetermined speed, which is usually about 75% of the full speed, and is then taken out of the circuit,

 

[FloppyKnockers]

Yeah, I found that on wikipedia too. Wasn't really asking for a definition of a capacitor more than looking for what uf to replace it with to achieve ~200 rpm or if bypassing altogether was a viable option.

 

[day_trippr]

Start capacitors have zero to do with how fast a motor spins.
Can you provide identifying information on the motor?

btw, are you certain there's no gearing in this motor? It's highly unlikely you're running a grain mill on a direct drive motor that's only spinning at 70 rpm...

Cheers!

 

[FloppyKnockers]

Start capacitors have zero to do with how fast a motor spins.
Can you provide identifying information on the motor?

btw, are you certain there's no gearing in this motor? It's highly unlikely you're running a grain mill on a direct drive motor that's only spinning at 70 rpm...

Cheers!

I was thinking it as you were typing it. There is a gear box bolted to the motor. I separated the two and powered up the motor - spun up to 1400 rpm easy. Never noticed the spindle coming out of (what I thought was the motor) was off of center. Probably because the electric box was blocking it.

Brings us to a new question. The gear box has a label on it likely referring to the gear ratio - 4GN-40K. Looks like I need to do some research and find a gear box that'll spin me a bit faster.

 

[FloppyKnockers]

Found some more info about the gear box, namely, what the numbers mean. 4 = dimension (80mm), GN = gear type (common gear box), 40 = reduction ratio, K = gear bearing ratio (ball bearing).

Now I need to math.

 

[cyberbackpacker]

Look for a compatible 10:1 gear box reducer; this will put you at 140rpm which is a great speed for the overwhelming majority of homebrew grain mills