motor for corona mill

[austinb]

I've been using my 18v power drill with my corona mill but i don't think it is good for the motor or the battery so i'm looking for another solution.

The local habitat for humanity runs a used hardware store. They have a lot of old motors there and i was thinking of using one for my mill. I was wondering what i would look for in a motor. Is there a way to slow it down without pulleys that won't burn out the motor?

I wanted to mount my mill over a bucket and want the whole setup to be as compact as possible which is why i was hoping to slow it down without pulleys.

 

[Hang Glider]

Might take a little DIY work to keep it compact, but these link are popular here -

like $39 plus shipping, 177RPM

 

[austinb]

Any other ideas. I'd like to use one of the used ones because they are super cheap but not if it is going to cost just as much to control the speed.

 

[mredge73]

You need to look for something with high torque and low rpm.
I would look for a corded heavy duty low rpm adjustable speed drill.
http://www.harborfreight.com/1-2-half-inch-heavy-duty-spade-handle-drill-93632.html

Low RPM AC motors will run at 1750rpm, way too fast.
Some will have internal winding (think fan motor) that will allow you to step down the rpm by switching to the lower winding's.
If you can find a 1/4 hp fan motor that can be dropped down to 200 rpm you may be in business, not likely that you will find one.

If you have a source of DC current (car battery) you may have more options, but you will need to build a voltage divider to control the voltage thus controlling the speed.
This is how adjustable speed power tools work.

 

[Lucky_Chicken]

What kind of speeds and power levels do the ones you can get run at? That's the question... its not hard to turn one down by half in a compact package if it will have enough power, but that all depends on what they are.

 

[mmonacel]

I suggest the 3 bucket system for being portable, compact, and cheap. Just pick up a cheap corded hammer drill from Harbor Freight.

https://www.homebrewtalk.com/f51/my-ugly-junk-corona-mill-station-90849/index66.html#post3120601

 

[Rivenin]

i use this doober
http://www.harborfreight.com/1-2-half-inch-variable-speed-reversible-d-handle-drill-47991.html

a ton of people use the same drill and have great results

 

[Csuho]

I use the same drill but the shaft I have read that alot of corona mills are outta wack and would benefit from a motor thats where the drill is a better option.

 

[DrJerryrigger]

Okay, so how handy are you?
Get the motor with the lowest RPM you can fined (most have a marking pate somewhere on them).
Attach a very small pulley to it, and attach the motor to a board. Attach a very large pulley to the mill and attach the mill to the board so the pulleys line up, put a belt on. DONE.

 

[wilserbrewer]

http://www.harborfreight.com/1-2-half-inch-variable-speed-reversible-d-handle-drill-47991.html

a ton of people use the same drill and have great results

Unless you are very handy and have large / free parts bin, IMHO it is very hard to do it any better and cheaper than the drill posted above.

 

[geniz]

Subscribed. I wanna see how this works out

 

[geniz]

Unless you are very handy and have large / free parts bin, IMHO it is very hard to do it any better and cheaper than the drill posted above.

I have a question about this drill. Can you lock it on at anything other than full speed. I bought another type of 1/2" drill from HF, and I can only lock it on at full speed. I am thinking of buying a rheostat to control the speed.

 

[wilserbrewer]

I have a question about this drill. Can you lock it on at anything other than full speed. I bought another type of 1/2" drill from HF, and I can only lock it on at full speed. I am thinking of buying a rheostat to control the speed.

Yes, there is a rotary adjustment on the top rear of the handle for speed control that is independant of the drill trigger that can be locked. I would guess that the speed varies b/w 300 - 700 rpm without load. I run ithe drill with the trigger locked and the speed adjustment at the lowest rpm while milling w/ the corona and it seems do it effortlessly.

 

[geniz]

Yes, there is a rotary adjustment on the top rear of the handle for speed control that is independant of the drill trigger that can be locked. I would guess that the speed varies b/w 300 - 700 rpm without load. I run ithe drill with the trigger locked and the speed adjustment at the lowest rpm while milling w/ the corona and it seems do it effortlessly.

Thanks for the info. This is certainly cheaper than a decent rheostat

 

[mredge73]

If you already have a drill that cannot be locked at a slower speed, here is a fairly cheap controller also available at harbor freight:
http://www.harborfreight.com/router-speed-control-43060.html

 

[bucfanmike]

with the right coupon that drill at HF is like 30-35. Hard to beat for the corona

 

[DrJerryrigger]

with the right coupon that drill at HF is like 30-35. Hard to beat for the corona

For price that is. Don't expect anything from harbor freight to work more than twice. They might last a long time, but more likely they'll die after not much use

 

[wilserbrewer]

For price that is. Don't expect anything from harbor freight to work more than twice. They might last a long time, but more likely they'll die after not much use

Granted HF tools are not the best money can buy. Home Depot stocks this Milwaukee unit...

http://www.homedepot.com/Tools-Hard...splay?langId=-1&storeId=10051&catalogId=10053

@ 6X the $

 

[Mrott]

also for your harbor freight tools... right now there's a promo out there for 20% off any one item. Here's a link to the coupon or if ordering online use coupon code "disc20"

 

[bucfanmike]

For price that is. Don't expect anything from harbor freight to work more than twice. They might last a long time, but more likely they'll die after not much use

This is untrue. Due to circumstances I found myself a few years ago in need of replacing power tools. I was building a deck and bought a circular saw, 2 drills, reciprocating saw and few other things from harbor freight. The only one of these that has give up the ghost is a 3/8 drill (the cheaper plastic one) that I killed drilling through my 3rd keggle. I also more recently bought their angle grinder and have cut 6 keg tops and I dont see any difference from the day i bought it.

Now if i worked with power tools for a living I would never buy them, but for the occasional home use they are fine.

 

[mredge73]

I second that.
My toolbox at work does not have any HF tools in it.
My garage at home is loaded with HF tools. Majority of my hand and power tools come from there.
They don't hold up very well at the job site with heavy daily use, but at home where I only use them for an hour or two on the weekends they work extremely well.

 

[Rivenin]

This is untrue. Due to circumstances I found myself a few years ago in need of replacing power tools. I was building a deck and bought a circular saw, 2 drills, reciprocating saw and few other things from harbor freight. The only one of these that has give up the ghost is a 3/8 drill (the cheaper plastic one) that I killed drilling through my 3rd keggle. I also more recently bought their angle grinder and have cut 6 keg tops and I dont see any difference from the day i bought it.

Now if i worked with power tools for a living I would never buy them, but for the occasional home use they are fine.

I second that.
My toolbox at work does not have any HF tools in it.
My garage at home is loaded with HF tools. Majority of my hand and power tools come from there.
They don't hold up very well at the job site with heavy daily use, but at home where I only use them for an hour or two on the weekends they work extremely well.

i third everything, i had their welder and angle grinder for 2 years or so, used them every weekend for hours at a time fixing a motorcycle. worked flawlessly. i moved and couldn't takethem with me
my home toolbox is filled with harbor freight stuff, i find myself breaking them occasionally but very rarely (still have a ratchet from prolly 5-6 years ago, still kickin!) usually it's from the 1/2" impact wrench (from harbor freight, thats even older) giving too much torque on a rusty or stuck bolt... i love HF!

 

[DrJerryrigger]

I have some HF tools, but mostly I find my tools at flea markets. An old drill for $5 seems to outlast a HF one in my experience. But I spend lots of time looking for those deals. If your not into that; buying a cheap HF one is not a bad choice.
Getting a new high quality drill would cost 6 times as much (maybe more) and will likely last more than 12 times longer. Depending on your use of a drill this will likely mean the drill will out live you, so the savings don't really add up (unless you use it a lot).
My biggest problem with HF tools is they seem to stop working at the worst possible time.

 

[thirstyutahn]

I was actually gonna buy that very drill, went on harbor freight entered the coupon code and it said its invalid. Called them up and asked why and they said they have it listed as a floor jack in their system which is an exception item. Tried it with another drill, same thing. Shady business, but man do they have some killer deals sometimes.