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Old 05-03-2003, 09:44 AM   #1
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Default Spur and pinion Pitch

If i have a 48 Pitch Spur, i have to buy 48 Pitch pinions yea?

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Old 05-03-2003, 09:53 AM   #2
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do 64 pitches make the drive train smoother? cuz 2 of me friends have TB01 and TAo4ss (48pitches) and me and my other have evo3 and tao4r (64 pitches)...i dis just because the diffs? or the gear pitches
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Old 05-03-2003, 10:04 AM   #3
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64pitch lets you gear in between 48 pitch gear ratios its good if you run on a smooth surface such as carpet etc. but if u race on a rough dirty surface with rocks and stuff its not a good idea. because the gears are so fine it can easily strip if anything gets in between the teeth. 48 pitch is used mostly in dirty enviroments such as off road or on dusty un prepared surfaces its mainly preferance in what you want to run on diffrent surfaces.
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Old 05-03-2003, 11:32 AM   #4
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Correct, 64 pitch may be a bit smoother, but not by much(as long as the user sets the gear mesh properly with whatever pitch he's using). The real reason to use 64 pitch(for some) is to have that extra bit of gear ratio flexibility, since going up or down 1 tooth on a pinion makes a smaller change than when using 48 pitch or others. And of course 64 pitch also has the trade-off of being more easily stripped if the mesh isn't set right or if debris gets into the gears(which is why it's not worth the trouble for many racers, including many factory sponsored guys). That being said, I do prefer 64 pitch myself, even in touring cars, but for anything in the dirt, I wouldn't use anything but 48 pitch.....
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Old 05-04-2003, 11:17 AM   #5
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what's pitch?
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Old 05-04-2003, 11:20 AM   #6
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couldn't you make a gear cover out of lexan to keep the dirt out and use the better gear ratio?
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Old 05-04-2003, 11:22 AM   #7
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Pitch is the size of the tooth.

48 pitch is good for almost every application, good strength, good range of gear ratios, easy to mesh. only go to 64 if you're looking for super-fine gear ratio adjustments. Theoretically it's more efficient, but you would have to very good to notice it.

Tamiya gears are not 64 or 48 pitch, though they look the same - they are metric pitch (0.4 and 0.6 respectively).
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Old 05-04-2003, 11:31 AM   #8
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64 pitch gives you more range of gearing adjustments, is more efficient (yes i can tell), and is quieter . If you know how to set a good gear mesh, it'll be fine for touring car in all but the most dusty/dirty surfaces.
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Old 05-04-2003, 12:05 PM   #9
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what is mesh?
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Old 05-04-2003, 12:46 PM   #10
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mesh is how the teeth of the gears go together. For example a very close mesh means that the teeth are far inside each other and makes it louder and less effient so that is a bad "mesh".
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Old 05-04-2003, 12:48 PM   #11
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i see
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Old 05-04-2003, 05:09 PM   #12
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but also a bad mesh is if ur pinion is far away ya? and makes a nasty sound
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Old 05-04-2003, 06:10 PM   #13
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ya and it will also strip the gears.
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Old 05-04-2003, 09:50 PM   #14
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Is there a good way to test if you have the correct mesh?
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Old 05-05-2003, 12:41 AM   #15
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just don't make it too tight and make it so that when you move the car back and fourth the pinion turns the spur cleanly
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