2005 FP Pinion

[Bill Gold]

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.

[Swampdude]

Ours is a 14 tooth, 32 pitch

[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

[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

[Cory]

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

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.

[Max Lobovsky]

How would you press, or pull for that matter, it off? I can't see how you can support the shaft properly.

[UCGL_Guy]

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

[Cory]

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.

[UCGL_Guy]

thanks for all the help- got an answer from the source.
press it off

[Biff]

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.

[MattB703]

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.

[Joe Johnson]

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.

[Tristan Lall]

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

[Mike Betts]

Originally Posted by Tristan Lall

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

All,

Team 177 has the number of teeth and markings as Team 188. 13 teeth (and I had two people check it).

Can Dr. Johnson or Mr. Copioli post a (hopefully small) spreadsheet or list of different motors and their relevant specs?

[Andy Brockway]

Originally Posted by Tristan Lall

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

I checked our motors last night.

13 tooth
74550-0642
TD014602 - this is different, but what does that mean?