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Old 09-05-2011, 02:11 AM   #1
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Default Spur Gear Adapter

Does anyone make an adapter to mount a normal spur gear directly to a 1/8" motor shaft. Possibly an existing model part that can be used for this purpose?
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Old 09-05-2011, 06:34 AM   #2
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Is this what you are looking for ??
http://www.rc-monster.com/proddetail...=RCM6mmsnglspd
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Old 09-05-2011, 09:05 AM   #3
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Thanks for the reply. Unfortunately, that is designed for a 6mm shaft and what I'm looking for needs a 1/8" shaft size (approximately 3.175mm) - the same size as a pinion gear shaft size. I've been able to find a few that are probably in the 4mm - 6mm range that fit the layshafts of a number of touring cars.
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Old 09-05-2011, 09:23 AM   #4
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Quote:
Originally Posted by calvin View Post
I've been able to find a few that are probably in the 4mm - 6mm range that fit the layshafts of a number of touring cars.
OK I misunderstood you first post

You want to use a spur gear adapter in place of a pinion, right on the motor shaft, just like you said !!!!

Last edited by Lazer Guy; 09-05-2011 at 09:40 AM.
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Old 09-05-2011, 09:42 AM   #5
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Afraid that won't work. What I want to do is mount a spur gear directly to the motor shaft in place of the pinion.
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Old 09-05-2011, 09:56 AM   #6
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After looking at my stuff, I thought I might have one for you but the ones I have use a pin through the shaft.
I have one that could work, just needs the pin hole drilled a taped for a set screw.
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Old 09-05-2011, 10:56 AM   #7
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Drilling and tapping a set screw is no problem. The shaft size seems to be the biggest hurdle. Do you know a part number or what it came off of to point me in the right direction. I spent all morning Googling but with no luck.
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Old 09-05-2011, 05:47 PM   #8
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These small personalized parts are really only available through McmasterCarr (www.mcmaster.com) or Servo city www.servocity.com .
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Old 09-06-2011, 12:49 AM   #9
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Thanks very much for your links.

It appears that the ServoCity 0.625 set screw hub (#3455H) will fill the bill (at least for Kimbrough spurs) from the measurements posted on-line. Appreciate the help.
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Old 09-06-2011, 03:33 PM   #10
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You're welcome....
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