Go to Post I was hoping they'd be selling robots. - Tristan Lall [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #6   Spotlight this post!  
Unread 03-08-2016, 22:11
Tcrump47 Tcrump47 is offline
Yeti 3506-CAD Team
FRC #3506
 
Join Date: Dec 2015
Rookie Year: 2014
Location: Charlotte, NC
Posts: 12
Tcrump47 is an unknown quantity at this point
Re: Custom Gearboxes

Quote:
Originally Posted by asid61 View Post
+1 on everything Nick said, although I think 7075 would be a waste of money compared to just using 6061.
For the standoffs, I design with either Vexpro tube axle (which is a bit large for 10-32) or I buy something like these tubings from McMaster:
http://www.mcmaster.com/#1658t19/=13kl5sw
http://www.mcmaster.com/#89955k459/=13kl6eq
The latter has a slightly smaller ID, so it's better suited for clearance, but it's also steel which is harder to machine.
It's diable to just buy aluminum shafts and drill them, but I find that's more hassle than cutting tubes to length on a lathe.

I design for tapping because I think it's easier, and a bit of loctite blue or just the construction of the chassis secures it. But nuts save you the hassle of tapping and you can make the front and back plates of your gearbox the same. However, if your gearbox is super long, it makes more sense just to use a hexagonal standoff (or thunderhex/hex shaft) and tap both ends for a screw.

I would not make my own custom gearboxes, especially for drivetrain use, unless I have a CNC mill/router or a waterjet. If you only have a manual mill it makes a lot more sense to just buy your gearboxes, unless you want to do something like a flipped CIM gearbox or save money.
We have access to a waterjet for curtain and will probably gain access to a CNC mill (hoping). Thanks for all of the information.
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 17:12.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi