Thane Heins Perepiteia.

[i_ron]

BENT THE MOTOR SHAFT TRYING TO HAMMER OFF A HOT ROTOR/DRIVE SHAFT AND HAD TO SEND OUT FOR A NEW MOTOR.

CHEERS

CHEAP- ASS-CRANKYpants 

This is a complex problem but with simple resolution. To get the rotor on and off requires that the
rotor be just slightly bigger in the bore than the shaft. Too big and it will not locate accurately

Not knowing the level of skill in California I had assumed some level of competence but for future
reference here is the story...

Any metal to metal fit should never be made dry. There are a mirade of product, from engine oil,
vaseline, white grease, lithium grease, silicone grease, C5A, Lubri Plate, SKF grease, EP Grease,
Krytox, the list is endless. Just a smear... then wipe off...got it?

The Ryobi spindle is .499 inches in diameter. The next step up, that is the part of the shaft that goes into the motor is .590. In other words the rotor seats against a step that is only .045 per side, a fat
millimeter. IF one were to over tighten the nut one can easily swage this step into the rotor hub. Too
loose and the rotor can spin and fire to the shaft at this junction.

In my rotors, therefore, I use a setscrew to retain the rotor, and merely snug up the nut for insurance.

I shipped the rotors to Ottawa and Ca with the instruction that the setscrew was OPTIONAL...BUT
if the setscrew was used then a flat must be filed on the motor shaft... otherwise the setscrew will
raise a burr that will prevent the rotor removal...

So just guessing from this distance... but it seems one or more of these simple engineering
practices were not followed.

IF it was from heat expansion then the solution is to cool the part with an air hose, or wait, but
never hammer off a part that is supposed to be a precision fit. In my design, the six screws that
hold the disc to the rotor can be removed, the disc slid back far enough to allow a three legged puller to be used to remove the hub.

Ron

[Cap-Z-ro]

Check out 'Red Wing' lathes used in the dental lab industry...they have a threaded cylinder that slides on over the shaft for safely removing metal to metal rotors.

When removing the rotor, just use the affixed lever arm to simply back the the threaded cylinder away from the motor, simultaneously forcing the rotor evenly off the shaft.

I don't imagine it would be too difficult to attach this little tool to any motor.

Regards...

[Thaelin]

Hi Thaelin,

Yup, it is an old saying in english... but the contorted mixed up mess I quoted is that of Bush's
now famous fractured speech...

http://ca.youtube.com/watch?v=8Ux3DKxxFoM

Favorite George W Bush sayings

"Is our children learning"

"I believe that human beings and fish can coexist"

"You misunderestimated me"

"It will take time to restore chaos"

Ron

     I'm rolling on the floor there. Fractured speech? That nit wit couldn't do anything
unless daddy told him exactly how to do it.  Sorry, just had to. 

And now we return you to your previously scheduled banter.......

thaelin

[SkyWatcher123]

Hi folks, hi Kator. I dont have on hand any text alluding to Teslas dynamo, i recall Peter Lindemann explaining it briefly in one of his lecture videos and if you really need this reference it would take a while to dig up the video but i could if you wish, but it may be in a Tesla patent. Here is a quick cad drawing and im shortly going to test with the neo magnets in alternating polarity configuration.

[CRANKYpants]

Check out 'Red Wing' lathes used in the dental lab industry...they have a threaded cylinder that slides on over the shaft for safely removing metal to metal rotors.

When removing the rotor, just use the affixed lever arm to simply back the the threaded cylinder away from the motor, simultaneously forcing the rotor evenly off the shaft.

I don't imagine it would be too difficult to attach this little tool to any motor.

Regards...

ATUALLY WE JUST TURNED THE MOTOR AROUND AND USED THE OTHER DRIVE-SHAFT ON THE OTHER SIDE OF THE MOTOR.

T