AM Planetary Gearbox (removing the fisher price gear/buying one without a gear)

[Ice Berg]

For the AM Planetary gearbox, you need to use a fisher price motor without a gear on it and then press the AM one on. The motors in the KOP have other gears on the already. Do teams pull these off somehow? Is there a place to find the fisher price without a gear on it? I looked at the FIRST documentation for where to buy extras of the KOP, and they don't list where to get the motor.

[gorrilla]

the FP motor?

like the one with the black plastic gearbox on it?

i dont think it comes attached this year(to the plastic gearbox)

[EricH]

the FP motor?

like the one with the black plastic gearbox on it?

i dont think it comes attached this year(to the plastic gearbox)He's talking about the pinion, not the gearbox.

[gorrilla]

He's talking about the pinion, not the gearbox.


yeah i just realized that:P


should be able to pop it off somehow....

[Ice Berg]

I'm not near my KOP at the moment, but I'm 99 percent sure that ours came attached.

[writchie]

Search this site for various ways to remove the pinion gear. You need to be very careful or you will trash the shaft and/or bearings.

We dremel a notch and then whack the pinion with a cold chisel. Cold chisel alone will work if you have a big enough hammer.

I believe that Andy Mark was supposed to be a source for the motors this year, probably with the pinion attached. I also believe that the entire assembly (but not the motor alone) can be ordered as a fisher price replacement part.

Beware - only the motor with the 9015 part number markings is FIRST legal.

[CraigHickman]

It comes attached. Heat it up with a cheap gas station lighter, and pull it off with pliers. There's some adhesive in there that will liquefy with a little bit of heat.

[Aren_Hill]

there have been several tecniques of removing the gear on the FP(which does come attached to the black gearbox this year).

check this thread out
http://www.chiefdelphi.com/forums/showthread.php?t=62016&highlight=FP+pinion

[Johnny]

I wouldn't recommend using heat or hitting the shaft of the fp motor whatsoever because they are easily destroyed. http://www.trossenrobotics.com/store/p/5154-GWS-Micro-Gear-Puller.aspx
http://www.trossenrobotics.com/store/p/5155-GWS-Standard-Gear-Puller.aspx
These are the gear pullers we use for the fp/banebot motors. They are cheap and work very well.

[Brandon Holley]

This same thread seems to come up this time every year....

If you do a quick search, you will see the one from last year...a lot of good ideas in there.

Heat does work, however its not necessary.

A nut splitter worked for us.

[Borisdamole]

We dremel a notch and then whack the pinion with a cold chisel. Cold chisel alone will work if you have a big enough hammer.


careful not to get shavings into the motor if you use a dremel... that can seriously mess up your FP... If you do use a dremel, tape the opening on the motor shut so shavings cant get in....