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Old 05-22-2009, 02:59 PM   #1
Csuho
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Default motorizing mill

I was wanting to hear from all of you out there that motorized your mills with a motor. I was wondering about the amount of torque needed as there is a huge selection of motors out there with a huge range of torque. I have my eyes set of a gear head ac motor so I can direct drive it to my mill.

My mill 2 roller 5" long 1.5" diameter.

I can't seem to find any info on the infamous beefy bodine so any1 with that motor please chime in with the specs please.

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Old 05-22-2009, 03:09 PM   #2
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Those motors were a batch for sale quite a while ago, but this is the same set-up.

Bodine AC Gear motor. 170RPM's. 1/6HP. New Ebay. $70 + bracket+ motor mounted junction box. About $35 IIRC.

At 1/6HP, 170RPM's, this thing does not bog, and eats anything but big rocks. More than enough power/torque.

42R-E Series Parallel Shaft AC Gearmotor Model 0650

Shmidling mill. Freebie.

Love joy couplings, spyder from McMaster Carr. <$15





A monster beefy Bodine. You need a capacitor, and a bracket.

Herbach & Rademan, electric motor, power supplies, timing motor, solar panels, fans, transformers, H: 151 RPM, 100 lb/in Torque AC Gearhead Motor

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Old 05-22-2009, 03:29 PM   #3
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There are millions of 1/3hp 1725 motors laying around from washing machines and such that you should be able to find one for cheap or free. Call your local appliance shop and see what they have laying around.

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Old 05-22-2009, 03:42 PM   #4
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Henry - Wow... So no sheaves and belts? That's what's holding me up on motorizing. Not sure what to order from rather intimidating Grainger and McMaster websites... I have a 1/3hp, 1725 just sitting around while I hand crank.

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Originally Posted by Tonedef131 View Post
There are millions of 1/3hp 1725 motors laying around from washing machines and such that you should be able to find one for cheap or free. Call your local appliance shop and see what they have laying around.
Got mine on eBay for like $30 shipped. Anyone have a parts list for the two sheaves and the belt that would work to get this puppy hooked up to a Barley Crusher? I know there are formulas for figuring out the RPMs... I'm not a big math guy.

So if anyone has motorized a BC with a 1/3hp 1725.... Would love to know EXACTLY what to order!

EDIT: Henry, I see your motor's going a lot slower, thus no sheaves. Gotcha.

Reason: Re-read Henry's post.
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Old 05-22-2009, 03:49 PM   #5
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Sure plain electric motors are laying around. I just bought a 3/4HP 120v for $1, to go back on a furnace squirrel cage that already has a belt and large sheave on the blower shaft. Someone must have wanted the origanl motor-I got the thing for free. Perfect for in the hot rod shop.

It is far easier and cleaner to use a gearmotor for a mill, as there is no shopping for belt and pulleys, and no guarding required. Parallel shaft gearmotors are simpler than right angle gearmotors, and generally are running a little faster.

Mine does not even require a separate capacitor.

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Old 05-22-2009, 03:50 PM   #6
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So if anyone has motorized a BC with a 1/3hp 1725.... Would love to know EXACTLY what to order!
I have a monster mill, but the only difference is that you will need an adaptor for your 3/8" drive shaft to fit the 1/2" sheave. But if you use a 10" sheave for the mill and a 1.5" sheave for the motor with a 3L v-belt you will be at 189-190rpms at the mill. I got all of this from Grainger for under $50.
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Old 05-23-2009, 03:56 AM   #7
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I know the rpm's I want to use which is in the 150-350 range. but torque is what I am worried about. but henry hill you say 100 in pounds is more than enough. but I dont wanna spend that much on a motor.

this is the 1 I wanted but they are out. Herbach & Rademan, electric motor, power supplies, timing motor, solar panels, fans, transformers, H: 250 RPM CCW Rotation 40 lb-in Torque

I have the use of a 1/3hp 1725 marathon motor but I dont wanna use pulleys. I'll keep looking I am sure to find something somewhere.

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Old 05-23-2009, 06:48 AM   #8
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Search Gear Motors on Ebay. There's usually a zillion of them listed. You will need to look closely at the specs. Torque requirements will vary with the mill design, but for general reference, 60 inch-lbs minimum would be what I would look for. Check power requirements (AC/DC), RPMs, voltage, Torque, Rotation and sometimes duty cycle. Prices vary wildly and so do the offerings.

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Old 05-23-2009, 04:44 PM   #9
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Henry & I are using nearly identical Bodine gear motors. The one I have is slower at 115 RPM and it requires a capacitor. These motors are near bulletproof and unstoppable:





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Old 05-23-2009, 04:58 PM   #10
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Quote:
Originally Posted by Catt22 View Post
Search Gear Motors on Ebay. There's usually a zillion of them listed. You will need to look closely at the specs. Torque requirements will vary with the mill design, but for general reference, 60 inch-lbs minimum would be what I would look for. Check power requirements (AC/DC), RPMs, voltage, Torque, Rotation and sometimes duty cycle. Prices vary wildly and so do the offerings.
From my link to Bodine's site
"Specifications
Model Number 0650 [CAD Drawings]
Category Split Phase, Non-Synchronous (With Centrifugal Switch)
Speed (rpm) 170
Rated Torque (lb-in) 45
Motor HP 1/6
Volts 115
Hz 60
Phases 1
Amps 3.6
Gear Ratio 10
Radial Load (lbs) 300
Length XH (inch) 9.08
Weight (lbs) 14.5
Connection Diagram 074 10292 [Download PDF]
Capacitor Part Number This model does not require a capacitor.
Product Type 42R5BFSI-E2
Web Price: $345.10"

In my experience, 45 in/lbs works fine, at at this speed. My rollers are 10" long.

List is $345, I got mine new, without bracket or junction box for $70 off of Ebay.
The torque varies with the gearing/final RPM.
Cat22's is the next one below mine on this chart, except for some reason his has an external capacitor:

42R-E Series Parallel Shaft AC Gearmotor

Split Phase, Non-Synchronous (With Centrifugal Switch)

Model Number
Speed (rpm) Torque (lb-in) Motor HP Volts Amps Gear Ratio

› 0635
19 208 1/12 115 2.4 90
14 277 1/12 115 2.4 120
› 0637
9.4 341 1/12 115 2.4 180
› 0639
5.7 310 1/12 115 2.4 300
› 0649
340 25 1/6 115 3.6 5
› 0650
170 45 1/6 115 3.6 10
› 0651
115 68 1/6 115 3.6 15
› 0652
85 90 1/6 115 3.6 20
› 0653
57 135 1/6 115 3.6 30
› 0654
42 180 1/6 115 3.6 40
› 0655
28 270 1/6 115 3.6 60

REMEMBER:YOU WANT 110, 115, or 120 volts AC!!
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