Thread: Custom Two Speed Gearbox
View Single Post
  #12   Spotlight this post!  
Unread 10-05-2012, 18:05
Adam.garcia Adam.garcia is offline
Design Mentor
FRC #0004 (Team 4 Element)
Team Role: Mentor
  
Join Date: Aug 2009
Rookie Year: 1997
Location: High Tech LA
Posts: 133
Adam.garcia is just really niceAdam.garcia is just really niceAdam.garcia is just really niceAdam.garcia is just really nice
Re: Custom Two Speed Gearbox
Quote:
Originally Posted by R.C. View Post
Adam the two common spur gear ratios are:

15:60 - 30:45

&

15:48 - 28:35

The First set of ratios is really nice for around a 4" Wheel. It allows you to get a really nice choice of reductions. We do a 14:45 with a 15:60 - 30:45 shifter set to get around 16/6 FPS. Which is really darn nice. Wanna gear faster or slower? Change the input ratio.

But the ratio above allows a really nice, compact gearbox. If you went to a smaller wheel ~3" Or so you could go to the smaller set and use the Latter ratio.

All the information above is for a 2 stage 2 speed, you can use either one if you go to the three stage. Its just more weight/money/less efficient.

If you have any questions, please post them up!

-RC
Wow, That's something that I did not know. I will start working with my design team on designing the gearbox.

We have been confused about this for about 4 weeks or so, and it just hit me that I had a huge and knowledgeable community right here on CD. I'll be sure to keep everybody posted if I have questions.
__________________
“The object of education is to teach us to love what is beautiful.”

“Never discourage anyone who continually makes progress, no matter how slow.”