Gear Ratio needed 2

[designmr]

Looking for confirmation, making sure I am ok with my design:

I have a two gears design.

The Driver gear which will be connected by chain to a Driven gear. My Driven gear will have a shaft on it that I need to rotate (2) 180 degree turns.

I believe my Driver ratio should be 2:1 (i.e 40 tooth, Driver & 20 tooth Driven), am I CORRECT?

Just double checking.

Thank you..

 

[JohnRBaker]

If you're asking, "Using a 40 tooth driver and a 20 tooth driven sproket, will rotating the drive ONE full turn result in the driver making TWO full turns?", the answer is YES.

That being said, I can't help but wonder that if this is the level of questions which you need answered, then I can't see how you can possible fit the profile for the intended uers of this site. Eng-Tips is an information exchange and engineering help site intended for use by professionals currently filling some sort of engineering or technical role, either as entropronetuers or as part of some larger organization where they are empoloyed.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[hydtools]

2 180-degree turns output is one 360-degree turn output per one 360-degree turn input. 1:1

Ted

 

[MintJulep]

Gear ratio is in to out. You haven't stated what York need out.

 

[MikeHalloran]

Chains normally connect sprockets. They won't work properly on gears.


Mike Halloran
Pembroke Pines, FL, USA

 

[MiketheEngineer]

As noted - the question doesn't make a lot of sense. Gears are gears...

If the driving gear is twice as big then twice the speed - 1/2 the horsepower. Does that help??

 

[rb1957]

nah, it probably doesn't ...
i mean it's pretty obvious (no?) that a gear with 1/2 as many teeth as it's meshing mate will be turning twice as fast.
adding the fact that it'll have 1/2 the power (well, it's 1/2 the torque isn't it ? ... isn't the power the same ? Torque*omega ??) probably doesn't help understand the gearing question.

mind you the question is confused by explicitly stating "My Driven gear will have a shaft on it that I need to rotate (2) 180 degree turns." what does that mean ??

 

[drawoh]

...

If the driving gear is twice as big then twice the speed - 1/2 the horsepower.

My first quick and dirty assumption is that power is constant through a gear train, or is affected only by efficiency. Torque and speed vary.

I do agree with JohnRBaker, above.

--
JHG

 

[hydtools]

Except for losses, power is constant. 2 x speed, 1/2 x torque.

Ted

 

[designmr]

I have always enjoyed posting questions here on this site since I always get great replies. Figuring one can always get intelligent answers. I've been in the design field for quite a few years, though I have not dealt with ever aspect in the engineering field. I am the sole designer in the company I currently work so no one really here to get answers to my question. So I post here.

I didn't really think I would get some of the (to me) rude comments. I would rather people (professionals) who don't have a proper comment to add, just not post. If my posting offend anyone for any reason, feel free again not to comment.

Thank you for those that posted decent comments and well the rest (you know who you are), please again keep you insensitive comments to yourself.

Didn't think I would EVER have to post a comment like this on this SITE, again, I figured everyone here is PROFESSIONAL.

 

[rb1957]

Auf Wiedersehen

 

[SnTMan]

Simple question, yes, but we do see worse...

I thought a few of the comments could be considered...uhhh...gratuitous. Just my opinion.

Regards,

Mike

 

[Artisi]

Hum the tune if you know it while we all sing - Bye bye it's been good to know you.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)