Pinion gear and motor spur gear contact
hughjass
tight should the contact be? I had to break my car down to rid the motor
of some tiny gravel bits that got in it. After putting it back together,
it doesn't have the "roll" it did before after I let off of the
throttle. I did take off my rear tires, but when I put them on, I think
I put them on a little too tight, which contributed to less roll;
however, I loosened them up to get more roll, but now they seem a little
too loose. This makes me think that I might have the pinion gear and the
motor teeth meshed a little too tight. This is all happening on a brand
new T3. Could the too-tight meshing of the gears be the cause?
TIA,
Hugh
Justin Mahn
gears to get the proper mesh. I simply make mine loose enough to wiggle
just a little bit. You definately do not want the gears mashed up against
each other. Also I hope you are using the dust cover with your T3. Those
fine gears can't handle pebbles and the like.
--
Justin Mahn
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"hughjass" <hugh...@gbpackersfan.com> wrote in message
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hughjass
The dust cover was on, so no worries there.
Thanks!!!
"Justin Mahn
remove Panties to reply"
I am not wearing my wife's panties today, so my boxer shorts will have
to do! LMAO
hugh
Rick Russell
hughjass <hugh...@gbpackersfan.com> wrote:
> When putting the teeth of the pinion gear and the motor together, how
The large gear is called the "spur" gear, and the small gear (attached
directly to the motor output shaft) is called the pinion.
Getting the gear mesh right is an art. A popular method is to cut a
strip of paper and place it between the gears. Mash the pinion and
spur together as closely as possible with the paper in place, then
lock them down. Feed the paper out and you should have pretty good
gear mesh.
Rick R.
hughjass
idea.
And thanks for putting me straight on the gear names. I shall never make
that mistake again!
Hugh
chuck...@nospam.com
hughjass <hugh...@gbpackersfan.com> wrote:
Something you should be aware of, is that most of the time
there is variation in clearance, at different points on the spur.
Most especially if you run 64 pitch. Which you probably do not.
Which is why I do not use the paper method..
If you do, right after you take the paper out, turn the gear back to
the area where the paper was.
observe the amount of play at that point.
Then rotate the gear a few teeth, and check to see that the 'play'
is the same as what you observed.
Do this every few teeth.... My money says you will find a spot where it
binds up.. THAT is the place to put the paper... If you insist on using it.
Dan
----------------------------------------------
just because you have one,
doesn't mean you have to act like one...
Rick Russell
> Something you should be aware of, is that most of the time
> there is variation in clearance, at different points on the spur.
I call this "a broken spur gear". If your spur gear is badly
out-of-round, it needs to be replaced.
Rick R.
Justin Mahn
round if you get a marginal one. If it causes binding problems, I would
definately return it, though.
--
Justin Mahn
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"Rick Russell" <ri...@is.rice.edu> wrote in message
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Juan Lauda
news:bkd8qc$q6m$2...@bob.news.rcn.net...
> Something you should be aware of, is that most of the time
> there is variation in clearance, at different points on the spur.
> Most especially if you run 64 pitch. Which you probably do not.
> Which is why I do not use the paper method..
> If you do, right after you take the paper out, turn the gear back to
> the area where the paper was.
> observe the amount of play at that point.
> Then rotate the gear a few teeth, and check to see that the 'play'
> is the same as what you observed.
> Do this every few teeth.... My money says you will find a spot where it
> binds up.. THAT is the place to put the paper... If you insist on using
it.
Don't use a tiny piece of paper, use a long strip that is at least two times
as long as the circumference of the spur gear. If you can pull the strip all
the way through end to end without binding then the mesh is not too tight
anywhere. At least one of the gears should have an odd number of teeth to
even out wear so it is important to check for at least two revolutions of
the spur gear to find any tight spots.
hughjass
and help!!
SIDE NOTE: After the paper trick, it worked a ton better.
*round of applause*
hugh
Jonathan Hodgson
> The large gear is called the "spur" gear, and the small gear (attached
> directly to the motor output shaft) is called the pinion.
Why do we do this? I work at a company which deals with gearing
professionally (and in some depth!) and the terminology is always "pinion
and wheel" or "pinion and gear" (or occasionally "input and output" ;-) for
the small and large gear respectively (although some of our software uses
the convention that the pinion is always the driv_ing_ gear...)
Properly, *both* gears are spur gears, as the teeth are straight-cut (as
opposed to helical).
Not trying to upset the applecart, just curious to know how/why/when we
(R/C car people) settled on non-standard terminology. At least bevel pairs
are still "crownwheel and pinion" ;-)
Jonny
Juan Lauda
news:7c0ker9w9e6m.o...@40tude.net...
> Why do we do this? I work at a company which deals with gearing
> professionally (and in some depth!) and the terminology is always "pinion
> and wheel" or "pinion and gear" (or occasionally "input and output" ;-)
for
> the small and large gear respectively (although some of our software uses
> the convention that the pinion is always the driv_ing_ gear...)
>
> Properly, *both* gears are spur gears, as the teeth are straight-cut (as
> opposed to helical).
>
> Not trying to upset the applecart, just curious to know how/why/when we
> (R/C car people) settled on non-standard terminology. At least bevel
pairs
> are still "crownwheel and pinion" ;-)
According to www.dictionary.com, a pinion is
"A small cogwheel that engages or is engaged by a larger cogwheel or a
rack."
Justin Mahn
large gear on the drive train, and they are all called the pinion and spur
per manufacturer. There is no need for further classification within the
realm of RC cars, so most RCers don't even realize that gears have further
classification.
BTW both pieces are gears AND wheels, so your terminology seams to be just
as nonsensical.
--
Justin Mahn
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"Jonathan Hodgson" <jp_ho...@eng1neer.com> wrote in message
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chuck...@nospam.com
ri...@is.rice.edu (Rick Russell) wrote:
Perhaps my stuff is just different than yours.
I can take a brand new 64 pitch spur gear, and there is nearly
always a difference from the tightest point, to the loosest.
Enough so that if you set the clearance perfect, at the loosest
point, it will be too tight at the tightest.
Which is why I check it the whole 360 degrees.
I set the minimum clearance, at the tightest spot...
Besides, the point to the original poster was not bad advise
to check at more than one point, regardless if the gear is
perfect or not... this way, you know.
your mileage can vary...
raineyw at knology dot net
> "Jonathan Hodgson" <jp_ho...@eng1neer.com> wrote in message
> <<snip>>
> According to www.dictionary.com, a pinion is
>
> "A small cogwheel that engages or is engaged by a larger cogwheel or a
> rack."
Yeah, but he's asking about the spur gear, not the pinion. Why do "we"
(hobbyist) call it a spur when the rest of the industry does not?
Bill R.
Juan Lauda
news:vnofea1...@corp.supernews.com...
Crawl back under your rock, troll.
MikeF
I design movable bridge machinery (draw, lift & rocker) and i see those
words all the time.
"raineyw at knology dot net" <"raineyw at knology dot net"> wrote in message
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raineyw at knology dot net
> <<snip>>
>>Yeah, but he's asking about the spur gear, not the pinion. Why do "we"
>>(hobbyist) call it a spur when the rest of the industry does not?
>
>
> Crawl back under your rock, troll.
>
>
What??? What the hell part of my post defines me as a troll??? I simply
clarified the original question!
Bill R.
SD
"Juan Lauda" <m...@here.org> wrote in message
news:blhj3o$fk2$1...@newsreaderg1.core.theplanet.net...
You first.
TempestNightmare
Actually, it should be a sheet (or piece) of loose leaf paper, from a
spiral binder or note book. Paper has many different weights and
thicknesses. Just trying to help.....
Jon
"Rick Russell" <ri...@is.rice.edu> wrote in message
news:bkco95$sbb$1...@joe.rice.edu...
dg
loosely rotate the spur back and forth, there is a little play. Just as
long as the spur isn't mashed up against the pinion, I figure its good.
--Dan
"TempestNightmare" <tempestn...@comcast.net> wrote in message
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