Re: [TCML] Flywheel Pulley on Treadmill Motor

[David Rieben <drieben@xxxxxxx>]

I recall when setting up a double emory wheeled bench grinder that the protruding shaft on one end was right-hand threaded while the one on the opposite end was left-hand threaded, so I would assume that the rotation of the shaft determines which way the threads are oriented.

David

Ed Phillips <evp@xxxxxxxxxxx> wrote:

>A recent note in another group to which I belong suggested that a 50/50 
>mixture of acetone and automatic transmission fluid makes a very cheap 
>and effective penetrating oil.  Worth a try for situations like this but 
>of course doesn't help determine whether the threads or left or right 
>handed, the most critical point of all!
>
>Ed
>
>David Rieben wrote:
>
>>Hi Brian, all,
>> 
>>Well I took the armature out of the motor shell once again this evening and and took several folds of
>>a small towel and wrapped around the soft iron laminants of the armature before grasping it moderately
>>firmly with the jaws of my bench vise. The flywheel/pulley assembly came off fairly easily with no need
>>for heating. And yes, it was indeed a left handed thread on the motor shaft and matching female 
>>threads of the pulley, so a CW spin losened it nicely. Thanks to everyone for helping me to liberate 
>>that flywheel from my motor's shaft ;^) BTW, looks like the shaft is a 1/2" left hand threaded one.
>>I suppose one could utilize a G-10 disc with matching threads on the mounting hole and "screw" it
>>onto the motor shaft?
>> 
>>David Rieben
>>
>>From: BrianB <brianb@xxxxxxxxxx>
>>To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> 
>>Sent: Thursday, August 1, 2013 9:13 AM
>>Subject: Re: [TCML] Flywheel Pulley on Treadmill Motor
>>
>>
>>David,
>>
>>The flywheel I removed was done exactly as you said with one important addition.
>>
>>Disassemble the motor and clamp the armature in a vise being careful not to damage it. I wrapped it in leather.
>>
>>* put a damp towel around the motor shaft then Heat the flywheel near the hub. This will loosen the locking compound and the expansion of the metal will allow the flywheel to be removed by hand (with gloves).
>>
>>As someone else mentioned these make GREAT drill press, mill, or lathe motors as their speed is easily adjustable to cut just right.
>>
>>Hope this helps.
>>
>>Regards,
>>BrianB
>>
>>
>>On Aug 1, 2013, at 3:41 AM, David Rieben <drieben@xxxxxxx> wrote:
>><Snip>
>>Actually, I looked a bit closer last night and took the 
>>  
>>
>>>two bolts loose that hold the armature, shaft assembly inside and aligned with the motor outer case 
>>>"shell" containing the permanent magnets. I'm thinking one may need to simply remove the armature
>>>and clamp securely with a vise (with possible padding between the armature surface and the vise
>>>jaws), then work on clamping and torquing that flywheel off. There is no "nut" as the flywheel pul-
>>>ley assembly is obviously itself threaded with female threads onto the male threaded shaft of the
>>>motor. 
>>>    
>>>
>><snip>
>>  
>>
>>>The next question is are the threads on the shaft left-hand or standard right-hand thread?
>>>    
>>>
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>>  
>>
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