Pinion gear and motor spur gear contact

[hughjass]

When putting the teeth of the pinion gear and the motor together, how
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]

Most people say to tighten down the motor with a piece of paper between the
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
remove Panties to reply

Post by hughjass
When putting the teeth of the pinion gear and the motor together, how
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

[hughjass]

Piece of paper, eh? Yep, I think mine might be a bit too tight then.

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]

Post by hughjass
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]

That is what someone else suggested... thanks though for the great paper
idea.

And thanks for putting me straight on the gear names. I shall never make
that mistake again!

Hugh

[c***@nospam.com]

Post by hughjass
That is what someone else suggested... thanks though for the great paper
idea.
And thanks for putting me straight on the gear names. I shall never make
that mistake again!
Hugh

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]

Post by c***@nospam.com
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]

There ARE tolerances to plastic spur gears and they CAN be slightly out of
round if you get a marginal one. If it causes binding problems, I would
definately return it, though.
--
Justin Mahn
remove Panties to e-mail

Post by Rick Russell

Post by c***@nospam.com
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.

[c***@nospam.com]

Post by Rick Russell

Post by c***@nospam.com
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.

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...



Dan
----------------------------------------------
just because you have one,
doesn't mean you have to act like one...

[Juan Lauda]

Post by c***@nospam.com
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]

Ok.. plenty to go on now! Thanks to everyone with the great suggestions
and help!!

SIDE NOTE: After the paper trick, it worked a ton better.

*round of applause*

hugh

[Jonathan Hodgson]

Post by Rick Russell
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]

Post by Jonathan Hodgson
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."

[unknown]

<<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]

Post by unknown

<<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?

Crawl back under your rock, troll.

[unknown]

<<snip>>

Post by unknown
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]

"raineyw at knology dot net" <"raineyw at knology dot net"> wrote in

Post by unknown

<<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?

Crawl back under your rock, troll.

You first.

[MikeF]

'spur' and 'pinion' are common in my industry.
I design movable bridge machinery (draw, lift & rocker) and i see those
words all the time.

Post by unknown

<<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.

[Justin Mahn]

Almost all RC cars use a small gear from the motor or engine to drive a
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
remove Panties to e-mail

Post by Jonathan Hodgson

Post by Rick Russell
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

[TempestNightmare]

Ummm, should I use 16 LB paper? 20 LB paper??/
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

Post by Rick Russell

Post by hughjass
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.

[dg]

All I do is make sure that if I hold the pinion in place with my fingers and
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

Post by TempestNightmare
Ummm, should I use 16 LB paper? 20 LB paper??/
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

Post by Rick Russell

Post by hughjass
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.

[z***@gmail.com]

Sell:
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In order to develop the oversea market, we are current seeking new partners around the world to create a bright future together. ZhaoWei is a right choice and excellent partnership with sincere services.

Company: Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd
URL: http://www.zwgearbox.com/
Contact: Anny Liu
Tel：[phone]
Fax：[phone]
E-mail:***@zwgearbox.com
Add: Blk. 18, Longwangmiao Industry Park, Fuyong Tn., Bao’an Dist., Shenzhen 518103, Guangdong, China

[l***@gmail.com]

China Shenzhen ZHAOWEI Machinery & Electronics Co. Ltd engages in designing, manufacturing and marketing all kinds of electric motors. They are mainly suitable for the following applications: smart home application used in smart kitchen and laundry, medical instrument for personal care, smart E-transmission applied in automobile, industry automation applied in telecommunication and a great variety of plastic/metal planetary gearbox in different sizes.
In order to develop the oversea market, we are current seeking new partners around the world to create a bright future together. ZhaoWei is a right choice and excellent partnership with sincere services.

Company: Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd
URL: http://www.zwgearbox.com/
Contact: Annie Liu
Tel：[phone]
Fax：[phone]
E-mail:***@zwgearbox.com
Add: Blk. 18, Longwangmiao Industry Park, Fuyong Tn., Bao’an Dist., Shenzhen 518103, Guangdong, China