Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Gear Ratio Question


trade student's Avatar
Visiting Guest

Posts: n/a

08-30-02, 05:18 AM   #1  
trade student
the_tow_guy Thanks..1 more?

If a main gear having 45 teeth is revolving at 360 RPM, then the speed of a 15 tooth pinion driving this gear is?
a) 120 RPM
b) 180 RPM
c) 1080 RPM
d) 1800 RPM

Sorry I'm so lost this is all new to me!

 
Sponsored Links
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,570
GA

08-30-02, 09:41 PM   #2  
A 45 tooth gear has 3 times as many teeth as the 15 tooth gear. So for every revolution of the 45 tooth gear, the 15 tooth gear revolves 3 times. Therefore when the 45 tooth gear turns 360 revolutions per minute, the 15 tooth gear is turning 1080 times per minute. (360 X 3 = 1080). This creates a 3:1 gear ratio since the driving gear is turning 3 times for every 1 turn of the driven gear.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
Search this Thread