Reversing 450TH

[rkte]

Hi guys,

I wanna use the 450TH direct drive for jet push propeller and the the direction should be reversed.
Is it okay to reverse the motor?
Notice if you set to reverse, seems it will push the moving part forward. Worried the motor end bell will pop-out
Please help and thanks for all valuable reply.

rkte

[Artyspec]

Yes its ok. Some ppl are using the 450TH for twinjets. Juz make sure u got the C clip on.

[rkte]

How to put the C clip? On motor axis didn't see any latch.
Thanks

Yes its ok. Some ppl are using the 450TH for twinjets. Juz make sure u got the C clip on.

[rkte]

Got reply from JGF but not sure what to do
Any idea?
Thanks

--------------------------
Sounds like you're running a tractor motor as a pusher ? The bell is
being
pushed away from the stator and what will happen is the motor will slow
down
and waste energy on heat as the bell pushes away. This will reduce your
top
end and is not very efficient. I recommend getting a pusher bell. If
you
are running a 3.17mm axle the bell is not removeable. You could push
the
axle closer to the bearing since the outer diameter of the axle is 3.17
but
the diameter at the bearing is 3mm and this will keep the bell from
moving.
A little loctite where the axle meets the bell on the outside would
re-enforce the strength of the hold on the axle to the bell.
---------------------

[rkte]

Seems there are 2 types of 450TH, tractor and pusher.

Tractor = for Trex (axle/shaft come out from blue mounting).
Pusher = for jets pusher (axle/shaft come out from the bell).

[rkte]

Here is the detail steps if wanna convert tractor to pusher...

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The 3.17 axle is locked in place so making it a pusher requires removal of the axle and replacement with a 3mm axle. The 3.17mm bell does not come off the tractor but you can use this to your benefit. Pull on the bell and see how far up it rides before stopping. I suspect you will be able to use this tractor motor as a pusher, but if it rides up too far, exposing the stator, you will experience some inefficiency. You can determine this by running RPM and Amp tests and comparing them against my charts. If you see a large difference, then you could push the axle "step" closer to the bearing. The "step" is where the axle changes from 3mm to 3.17mm. Look very closely near where the axle approaches the bearing and you'll see this step. By closing the distance that step is from the bearing you are in effect locking that bell from moving away from the stator and will be able to run it in tractor mode. Be careful that you don't damage your axle or bearing. An arbor is the easiest method to move that axle and green loctite on the opposite side where the axle will protrude from the bell is called for.
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JGF customer support is good