well Apparently batterys are not the only thing you can Recycle from cordless power tools.

i have tested it and it works surprisingly well.

even has a built in cooling fan. for anyone with rear chain drive its worth trying out.

http://www.canadianhomeworkshop.com/stuff/tools_cordless_saws.shtml



cheers

It looks like it could be an interesting project, and recycling anything in order to make something cool is always good. How wide is that motor though? It might be hard to mount sideways conveniently, but the picture could just be lying.

Do you have pics of the motor attached to your bike? What about the speed of the motor and gear reduction? the width might not be much of an issue given the need to reduce the speed - you can place the reduction vehicle on the inside of the motor plane. What is the mtbf of this motor if placed in the saw?

It looks like it could be an interesting project, and recycling anything in order to make something cool is always good. How wide is that motor though? It might be hard to mount sideways conveniently, but the picture could just be lying.


it sticks out about 4 to 5 inches

Do you have pics of the motor attached to your bike? What about the speed of the motor and gear reduction? the width might not be much of an issue given the need to reduce the speed - you can place the reduction vehicle on the inside of the motor plane. What is the mtbf of this motor if placed in the saw?



i will have pics and a video of it working i was in a hurry when i posted it. im packing to move to my new place. should have it next week when i get Settled In. the gear reduction is about the same as the currie motor

cheers

Hey that's amazing. I've got a motor drive from a cordless chainsaw somewhere ....... now where did I put it......

How loud is it? It seems like that would be pretty loud...

i kinda like the sound it sounds like jet taking off ;)

it draws about 4 amps just to turn it over. im going to have fun with this one.



http://www.youtube.com/watch?v=rNx0jpMPzM8

i kinda like the sound it sounds like jet taking off ;)

it draws about 4 amps just to turn it over. im going to have fun with this one.



http://www.youtube.com/watch?v=rNx0jpMPzM8

4 amps no load current? Any idea of the RPM?

when i put it on my battery charger to test it

it came up around 4 amps no load. not sure of the rpm yet but its fast

im just mounting it better on the bike as i type. here is a small vid with very low voltage no mounting screws i tested it for a sec with higher amp battery allmost twisted my fingers off ;)

the bike is resting on a sootcase ready to fall over.

http://www.youtube.com/watch?v=r9A0Zp1NlTY

i kinda like the sound it sounds like jet taking off ;)

it draws about 4 amps just to turn it over. im going to have fun with this one.



http://www.youtube.com/watch?v=rNx0jpMPzM8


Man, that thing is loud!

heh watch what happends when i mount it on the plate and give it the full 24 volts that was only 6volts

How are you actually driving the wheel in that video?

How much does it weigh? And what is the wattage rating? If you flipped the motor 180 degrees the body of the motor would be contained within the bicycle frame itself and if you changed the polarity of the motor the direction of the motor would change also. How much did the tool cost that contained the motor?

Have you had a chance to open up the case? Based on your observations does it seem like it will be a durable motor - mounted on a 26" wheel?

It looks to me like the motor is simply driving a gear mounted on the left side of the wheel hub. There are wheels out there like that with mounts on both sides of the hub, usually made for the ability to flip between fixie/geared.

How much does it weigh? And what is the wattage rating? If you flipped the motor 180 degrees the body of the motor would be contained within the bicycle frame itself and if you changed the polarity of the motor the direction of the motor would change also. How much did the tool cost that contained the motor?

Have you had a chance to open up the case? Based on your observations does it seem like it will be a durable motor - mounted on a 26" wheel?


How much does it weigh. hmm less than the currie motor.

wattage rating is 24 volts.

if you change the polarity it works in reverse the motor anyway.

i picked it up a flee market. the name of the tool was bolton tools. it cost me $29

yes it is a geared motor just like the currie but with a smaller gear. side by side the gears look the same
just smaller im sure the gear will be fine if i pack it with bearing grease like i did the currie motor.

ok i have tested it. i get my new controller friday so i have no way of taking it outside to test.
but i did try it with the full 24volts its a little fast :)


it would be fun for a bit but im sure i could burn it out fast. i just dont want to fry my new controller.
we shall see.


http://www.youtube.com/watch?v=n2k0g-yn6WA

awesome !

It looks to me like the motor is simply driving a gear mounted on the left side of the wheel hub. There are wheels out there like that with mounts on both sides of the hub, usually made for the ability to flip between fixie/geared.

Ah yes, - I can see that more clearly in the latest video clip :)
The bracket is a nice neat job, but I do wonder how often the motor might get banged against things with it sticking out like that.

i was thinking the same thing if i have a spill on that side im sure it would rip the motor off. good thing i have two e-bikes one to play with. the other i leave in one piece. :)

Way cool! Why are you afraid of it burning up? No appropriate controller? It looks like the wheel in turning in reverse. You don't have to have the motor sticking way out like that. If there is some space you can flip it 180 degrees and mount it behind the seat tube. Then you will need to take care of the "direction of the rear wheel" problem. Yes, it was probably set up so that it could be flipped easily so that means it only freewheels in one direction. 24 volts is convenient for an ebike...but how many watts is it rated for?

when i get my controller it should be fine.

24v 480watts no load speed 3500rpm

jeez thats definatley not a stealth setup!

Any more progress?

well i finally got unpacked set up the controller took it in the parking lot to test.

it works but the gears are to small and you need to have allot of speed just to use it. from a dead stop it just blows fuses to manny amps. motors good. i would say its 30 teeth short of a currie :)

no need to make a video it was nothing spectacular. i have a few other ideas im going to try. with my hubmotor.

Do you think a change of final drive ratio would make this conversion a practical one? I'm still hunting for that electric chainsaw motor I've got stashed away somewhere.

Yes. Definitely.

so it would need about a 10 to 1 ratio? It sounds like it would benefit from a transmission of some sort. And...do you think you could up the voltage to 36 volts? I am going to be putting a dewalt setup on my bike so 36 volts would be nice and convenient

so it would need about a 10 to 1 ratio? It sounds like it would benefit from a transmission of some sort. And...do you think you could up the voltage to 36 volts? I am going to be putting a dewalt setup on my bike so 36 volts would be nice and convenient

Why not just use a motor from a Dewalt saw that takes those batteries?

I kind of like this idea but to drive the crank instead.

Get one of those freewheeling cranks and use 2 of these "recycled" circular saw motors to drive the drive system. I think you'd need 2 motors to have decent power. It's one thing to turn an unloaded wheel, it's another thing to haul a bike, battery and 180lbs rider up a hill.

I agree about driving the crank because then the motor is assisting the rider's pedalling and the motor can take advantage of the bike's gearing. Some kind of freewheel setup would be essential though unless you like having to constantly pedal while under power.

I still haven't managed to find that @#$!%& electric chainsaw motor and gearbox :mad:

so it would need about a 10 to 1 ratio? It sounds like it would benefit from a transmission of some sort. And...do you think you could up the voltage to 36 volts? I am going to be putting a dewalt setup on my bike so 36 volts would be nice and convenient


not sure you could when i tested the motor at its 24volt it got hot. it would work better if it was a 36volt motor.

i would love to power the crank but thers so manny parts to order to do it safely.

When used on a circular saw, the motor would run for a minute, then be off for a minute- people don't normally saw for a half hour continuously. So you are changing the operating conditions of the motor, and could have some overheating from it.

that is a good point. That is the problem with a lot of diy ebike stuff. We raid, pillage and plunder in search of the optimal motor...and can often find something that works....for a while, but then we discover it was not developed for constant use. If you look at a motor's power curve, wattage, design, etc is there some way to tell if the motor will endure sustained use without frying or melting?

sure with a little research but that takes the fun out of it :)

Hehehehe...the spirit of adventure...I am sure that is how peanut butter cups were invented ;) My main interest in the circular saw motor is the shape - relatively thin and long so that it will fit into small spaces and give designers more flexibility. Any other do-dads that have this kind of motor?

If you look at a motor's power curve, wattage, design, etc is there some way to tell if the motor will endure sustained use without frying or melting?

For a motor that is designed to provide power then rest, power then rest (like a saw's motor) the motor should be fine if it is used at same voltage, lower power, lower amperage than it was designed for... and try to keep it from getting too hot to touch.

I'm told lower amperage means lower torque, so that means you would have to make sure you use a low enough gear ratio.

How do you keep a motor from getting too hot? besides stop using it for a while? add a radiator? refrigeration system? 2 friendly humming birds sitting on it flapping their wings? :) And what is "too hot?"

Out of curiosity, what was wrong with the MY1018?

nothing works great. im just going with a brushless setup.

How do you keep a motor from getting too hot? besides stop using it for a while? add a radiator? refrigeration system? 2 friendly humming birds sitting on it flapping their wings? :) And what is "too hot?"


there are ways to cool just about anything here is one example->http://visforvoltage.org/forum-topic/testing/421-moderator-testing-o1-chain-wheel-motor-my1018


and this one im trying now->http://endless-sphere.com/forums/viewtopic.php?p=28397&sid=5645a5e60764949a79507bbbb0076192


cheers