Go to Post Holy Underwriters Laboratories Industrial Safety Awards Batman! - AndyB [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

 
Closed Thread
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 23-07-2013, 10:05
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,516
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: 25# Sprockets

Quote:
Originally Posted by AdamHeard View Post
for $5 each, I'm surprised you did this! That's a crazy amount of work to avoid a $5 sprocket.
More like $12 each. Hubbed sprockets. It's only probably $2 of bar stock so there's some savings. Not much trouble at all in a VMC. On a router I wouldn't bother.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
  #2   Spotlight this post!  
Unread 23-07-2013, 11:45
Cory's Avatar
Cory Cory is offline
Registered User
AKA: Cory McBride
FRC #0254 (The Cheesy Poofs)
Team Role: Engineer
 
Join Date: May 2002
Rookie Year: 2001
Location: Redwood City, CA
Posts: 6,812
Cory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond repute
Send a message via AIM to Cory
Re: 25# Sprockets

Quote:
Originally Posted by sanddrag View Post
More like $12 each. Hubbed sprockets. It's only probably $2 of bar stock so there's some savings. Not much trouble at all in a VMC. On a router I wouldn't bother.
Are you unable to use the Vexpro sprockets?
__________________
2001-2004: Team 100
2006-Present: Team 254
  #3   Spotlight this post!  
Unread 24-07-2013, 12:47
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,516
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: 25# Sprockets

Quote:
Originally Posted by Cory View Post
Are you unable to use the Vexpro sprockets?
Need 7/16" hex. If they made them in 7/16" hex, we'd be all over it.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
  #4   Spotlight this post!  
Unread 24-07-2013, 15:37
Redo91's Avatar
Redo91 Redo91 is offline
Registered User
AKA: Justin
no team
Team Role: Engineer
 
Join Date: Dec 2006
Rookie Year: 2006
Location: Carlsbad
Posts: 149
Redo91 is a glorious beacon of lightRedo91 is a glorious beacon of lightRedo91 is a glorious beacon of lightRedo91 is a glorious beacon of lightRedo91 is a glorious beacon of lightRedo91 is a glorious beacon of light
Re: 25# Sprockets

We had our sponsor laser cut some steel sprockets for us when I was a student. The only trouble we had was the chain would skip off. That was solved by beveling the teeth on a belt sander. We never had an issue with them after that.
__________________
Team 1296-Full Metal Jackets
Alumni 2009
Mentor 2009-2014

Team 624-CRyptonite
Mentor 2014-2015
  #5   Spotlight this post!  
Unread 24-07-2013, 18:06
R.C.'s Avatar
R.C. R.C. is offline
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,184
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: 25# Sprockets

Quote:
Originally Posted by sanddrag View Post
Need 7/16" hex. If they made them in 7/16" hex, we'd be all over it.
Do you use 1/2" hex on the other side for the wheel?

We do the 7/16" step down as well (thanks adam!) and we love it. But the sprocket side is 1/2" hex.

I can see why its 7/16" on both sides as you can just buy precision 7075" (1/2" round) and just hex the portions you'd like vs machining everything down from a larger size. Is that the reasoning?

-RC
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #6   Spotlight this post!  
Unread 24-07-2013, 18:19
AdamHeard's Avatar
AdamHeard AdamHeard is offline
Lead Mentor
FRC #0973 (Greybots)
Team Role: Mentor
 
Join Date: Oct 2004
Rookie Year: 2004
Location: Atascadero
Posts: 5,508
AdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond repute
Send a message via AIM to AdamHeard
Re: 25# Sprockets

Quote:
Originally Posted by R.C. View Post
Do you use 1/2" hex on the other side for the wheel?

We do the 7/16" step down as well (thanks adam!) and we love it. But the sprocket side is 1/2" hex.

I can see why its 7/16" on both sides as you can just buy precision 7075" (1/2" round) and just hex the portions you'd like vs machining everything down from a larger size. Is that the reasoning?

-RC
That's why 254 does it.

254 is still forced to use 1/2" hex on the gearbox though.
  #7   Spotlight this post!  
Unread 24-07-2013, 23:49
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,516
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: 25# Sprockets

Quote:
Originally Posted by R.C. View Post
Do you use 1/2" hex on the other side for the wheel?

We do the 7/16" step down as well (thanks adam!) and we love it. But the sprocket side is 1/2" hex.

I can see why its 7/16" on both sides as you can just buy precision 7075" (1/2" round) and just hex the portions you'd like vs machining everything down from a larger size. Is that the reasoning?

-RC
Exactly. .500 PG 7075 round. Mill the hexes, done deal.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
Closed Thread


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 23:13.

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