Thread: Fisher price motor gear specs
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Unread 23-06-2002, 23:23
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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20 Degree Pressure Angle
Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 7/13/2000 8:49 AM MST


In Reply to: Re: Fisher price motor gear specs posted by Amy on 7/12/2000 6:45 PM MST:



The gears are all standard, full depth, 20 degree pressure angle, English pitch gears.

The gears are slightly modified to help them with strength & mfg. issues, but it is my understanding that the modifications are not too signifcant (they will all run fine with standard steel gears).

A tip for getting the Diametral Pitch of full depth gears:

DP = (Number of teeth + 2) / (Outside Diameter of the Gear)

I have not looked at the gears in a while, but I recall that the pitches are 32 at the motor pinion and 20 at the output gear.

I suppose that the intermediat gears are 24 pitch as that is the only common English D.P. in between 20 and 32.

Good luck.

Joe J.


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