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  1. #1
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    Help With Pinion Gear

    I just don't understand one thing. I need a 14 tooth or 13 tooth pinion gear. My lhs's does not carry pinions with that low of teeth. One hobby shop said they can order it. But what does 48p mean. Like say a Robinson racing pinion gear 48p 14 tooth. What does 48p mean. What would i need for the slash its no the stock motor.
    Thanks
    IF YOUR NOT FIRST YOUR LAST
    Slash, N.pede,Revo

  2. #2
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    48 means the pitch of the pinion and 13 14 teeth seem way to low for a slash i run a 18 and up i acutally 97% of the time run 21. hope that helps for example a emaxx uses a 32pitch pinion its a bigger pinion
    looking for a E-revo !!

  3. #3
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    Which motor do you have? That would help us recommend a gearing for you.
    "Happiness depends upon ourselves." -Aristotle

  4. #4
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    associated 15t and soon to be an Team
    Orion 15t
    IF YOUR NOT FIRST YOUR LAST
    Slash, N.pede,Revo

  5. #5
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    I don't have the answer but I can tell you that the goal is to prevent the motor from getting to hot. Get a temp gauge and keep it cool. It will last longer.

  6. #6
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    Look here for the pinion/spur you need.. http://spreadsheets.google.com/pub?key=p9c...tjA7nLsQ7N2eRfg

  7. #7
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    Either the 13 or 14-tooth pinion gears would probably work fine. Just make sure that your hobby shop orders the steel RRP gears, and not the aluminum ones!
    "Happiness depends upon ourselves." -Aristotle

  8. #8
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    Pitch is the number of teeth per inch. We might say it determines the c/c distance between teeth or the space between teeth so all the teeth line up to each other.
    4s Pede, 6S Maxx, 3S Rusty, 6S slash

  9. #9
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    Quote Originally Posted by rupert
    Pitch is the number of teeth per inch. We might say it determines the c/c distance between teeth or the space between teeth so all the teeth line up to each other.
    Just a tad confused here is all. LOL

    So, how exactly would you explain a...48pitch...18tooth pinion gear?

    If you put 48 teeth on this gear, would it equal an inch then?

    I have something not connecting with the brain cells here is all with this. LOL

    Been wanting to know this anyhoo.

    Thanks for any further help.

  10. #10
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    Yes, 48 teeth would be an inch long (or around if on a gear)

    An 18 tooth gear (all 48 pitch gears) have thier teeth 1/48 th inch apart.
    4s Pede, 6S Maxx, 3S Rusty, 6S slash

  11. #11
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    I see, got it now with the Pitch thingy.

    Just needed a bit more of an explanation.

    Thanks again.

  12. #12
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    Quote Originally Posted by rupert
    Yes, 48 teeth would be an inch long (or around if on a gear)

    An 18 tooth gear (all 48 pitch gears) have thier teeth 1/48 th inch apart.
    Thats not correct... The gears are measured in diametral pitch which means that a 48 pitch gear with 48t would have a diameter of 1". To calculate the distance between the teeth you would figure the circumference and then divide by # of teeth.
    [QUOTE=Billstmaxx]if the water can't get out how does it get in??[/QUOTE]

  13. #13
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    Went and did a little bit of search on Gear Pitch real quick.

    What threw me at first was, I was looking at the Pitch as in, the same thing as the Pitch of a roof. Not necessarly the same thing here.

    When looking straight at the gear when mounted lets say, and looking at two teeth. It's said that the pitch is the distance from the inside of one tooth, to the outside of the other tooth, if you can picture that.

    I am starting to get it, but will look further into it better when I can get more time, and focus on this a bit better.

    Just been wanting to understand this end of things a bit more.

    Thanks again

  14. #14
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    You can find a basic explanation here and google should get you many sites with more detailed info depending what your looking for.
    [QUOTE=Billstmaxx]if the water can't get out how does it get in??[/QUOTE]

  15. #15
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    I use a robinson racing 16 tooth on mine and havent had any problems.

  16. #16
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    Quote Originally Posted by yellerevo
    I use a robinson racing 16 tooth on mine and havent had any problems.
    With a 15-turn motor and Slash tires?
    "Happiness depends upon ourselves." -Aristotle

  17. #17
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    Quote Originally Posted by Just go Play
    Thats not correct... The gears are measured in diametral pitch which means that a 48 pitch gear with 48t would have a diameter of 1". To calculate the distance between the teeth you would figure the circumference and then divide by # of teeth.
    Yes, your right. It's another 3.14 to divide that I forgot about.
    Is it about .06" perhaps.

    Here's a nice calc http://www.scriptasylum.com/rc_speed/_gear_calc.html
    4s Pede, 6S Maxx, 3S Rusty, 6S slash

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