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Unread 09-01-2005, 16:04
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2005 FP Pinion

Does anyone have a tooth count and pitch for the pinion on the 2005 FP motor? Thanks in advance!
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Unread 09-01-2005, 16:10
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Re: 2005 FP Pinion

The manual says it is 21T, not sure on the pitch but in the past they have been 32P.
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Unread 09-01-2005, 19:37
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Re: 2005 FP Pinion

Quote:
Originally Posted by sanddrag
The manual says it is 21T, not sure on the pitch but in the past they have been 32P.
Sanddrag,
Where does it say 21T in the manual? I haven't seemed to find that.
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Unread 09-01-2005, 20:04
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Re: 2005 FP Pinion

Ours is a 14 tooth, 32 pitch
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Unread 10-01-2005, 09:06
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Re: 2005 FP Pinion

Dan is correct. Everyone should have a 14 tooth, 32 Diametral Pitch gear on the FP motor. THe documentation on the list of kit parts says 21 teeth and it is wrong.

-Paul
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Unread 12-01-2005, 13:25
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Re: 2005 FP Pinion

Anyone have an idea of how this gear is attached to the shaft - and any success removing it safely. What methods have been used?
Thanks in Advance
Ken
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Unread 12-01-2005, 13:39
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Re: 2005 FP Pinion

Quote:
Originally Posted by UCGL_Guy
Anyone have an idea of how this gear is attached to the shaft - and any success removing it safely. What methods have been used?
Thanks in Advance
Ken
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6th year rookie
The best way to do it would be with an arbor press.

You *COULD* attempt to cut a wedge out of it with a dremel and remove it that way. I don't think this is a good method at all, but some teams swear it works. You have to be incredibly careful to make sure that you dont cut into the shaft, or get shavings into the internals of the motor.

Also, I believe Paul posted a drawing for a gear puller that can be made with a mill, on here last year sometime.
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Unread 12-01-2005, 13:42
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Re: 2005 FP Pinion

How would you press, or pull for that matter, it off? I can't see how you can support the shaft properly.
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Unread 12-01-2005, 13:50
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Re: 2005 FP Pinion

First let me say we haven't received our kit yet so I haven't seen this year's motors. Our machinist in just quickly looking at some from prior years said they look like they are "glued" to the shafts. has anyone actually removed these gears from the shafts this year?

Keep the cards and letters coming.
KY
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Unread 12-01-2005, 13:53
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Re: 2005 FP Pinion

Quote:
Originally Posted by Max Lobovsky
How would you press, or pull for that matter, it off? I can't see how you can support the shaft properly.

Cut a slot in a plate and slide it on the shaft so it's supporting the gear.
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Unread 12-01-2005, 15:05
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Re: 2005 FP Pinion

thanks for all the help- got an answer from the source.
press it off
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Unread 12-01-2005, 19:57
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Re: 2005 FP Pinion

Quote:
Originally Posted by Paul Copioli
Dan is correct. Everyone should have a 14 tooth, 32 Diametral Pitch gear on the FP motor. THe documentation on the list of kit parts says 21 teeth and it is wrong.

-Paul
I am confused.

I just counted the teeth on our F-P motor from this year's kit and it has 15 teeth, not 14. I counted it 4 times and had 2 other people count it.

Can anybody physically confirm the number of teeth on their motor?

Thanks
Matt B.
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Unread 12-01-2005, 21:23
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Re: 2005 FP Pinion

Quote:
Originally Posted by MattB703
I am confused.

I just counted the teeth on our F-P motor from this year's kit and it has 15 teeth, not 14. I counted it 4 times and had 2 other people count it.

Can anybody physically confirm the number of teeth on their motor?

Thanks
Matt B.
This is bad... ...will you please post a picture of you motor -- especially the sticker on the side, a close up of the gear would be good too.

If you have 15T, then F-P has provided and/or FIRST shipped a mixed lot. Without actually taking the motor of the transmission it is close to impossible to tell the difference. Even off the transmission it can be very hard to make the ID.

Paul Copioli and I can tell you that the folks that service these transmissions for F-P (in the Detroit area in is McNichols Electric just down the block for Beaumont Hospital on 13 Mile) have absolutely no idea which motor is which, in fact, the guy told me he goes SOLELY by the # of teeth on the motor pinion when he sells a motor. Paul and I both told him that this is not really an adequate method, but I don't think we made a dent.

If I were you, I would a stall the motor (for a short period of time) at 0.8 volts or so and accurately measure the voltage accross the motor and the current. If the current is not about 10 Amps at 0.8V (i.e. the Resistance should be 0.08 Ohms per the spec) ,you have confirmation that you have a different motor than the rest of us.

How many other teams have counted the pinion teeth carefully? Any more 15's out there?

Joe J.
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Last edited by Joe Johnson : 12-01-2005 at 21:25.
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Unread 12-01-2005, 21:46
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Re: 2005 FP Pinion

Quote:
Originally Posted by Joe Johnson
This is bad... ...will you please post a picture of you motor -- especially the sticker on the side, a close up of the gear would be good too.

If you have 15T, then F-P has provided and/or FIRST shipped a mixed lot. Without actually taking the motor of the transmission it is close to impossible to tell the difference. Even off the transmission it can be very hard to make the ID.
This is worse: 188 has counted teeth, and the number is 13. I've just got off the phone with those involved, and they had separate people count it (twice!). For reference, the identifying marks on the motor are as follows:

74550-0642
TD034701
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Unread 12-01-2005, 22:11
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Re: 2005 FP Pinion

Quote:
Originally Posted by UCGL_Guy
Anyone have an idea of how this gear is attached to the shaft - and any success removing it safely. What methods have been used?
Thanks in Advance
Ken
Team 476
6th year rookie
We had good luck last year on the hardened gears on the drill motors with a cold chisel a block of steel and a ball peen hammer. I would test this on a softer gear for a motor that you are not going to use or a spare. I just put the chisel (a small one, that didn't fit to the bottom between the teeth,and not too wide) between two teeth with a helper holding the motor and the block of steel under the gear, and gave it a good whack. It split the gear almost down the center and the remainder came off with a gentle tug with fingers. I don't know if this is an excepted method, but it did more for us.
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