OCCRA
Go to Post To have respect for the process you are in right now, respect the knowledge around you by using it to your full advantage. - Scott Ritchie [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 11-09-2018, 02:35 PM
philso philso is offline
Mentor
FRC #3103 (Iron Plaid)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2009
Location: Houston, Tx
Posts: 1,729
philso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond repute
how to drive 1/2" hex shafts with a drill?

I have seen many videos of teams trying out ideas for things like intakes using wheels mounted on shafts and spun using a drill. The team leadership wants to have new team members try building "really janky prototypes" at a Mock Kickoff we are doing on Sunday.

We have lots of 1/2" hex shaft but it is too big to fit in the chucks of the drills we have (3/8" and 1/2"). We don't have access to a lathe at this time. We do have some hubs for the 1/2" hex. We don't have any of the 3/8" hex shaft and hubs.

What sorts of things can we do to make such prototypes with what we have? Can we do it by putting 1/2" round shaft in a hub for the 1/2" hex and applying a lot of duct tape? Is that janky enough?
Reply With Quote
  #2   Spotlight this post!  
Unread 11-09-2018, 02:42 PM
Mike Marandola's Avatar
Mike Marandola Mike Marandola is offline
Trust the Process
AKA: Mike Marandola
FRC #0316 (LUNATECS)
Team Role: Mentor
 
Join Date: Jan 2009
Rookie Year: 2007
Location: Pedricktown, NJ
Posts: 824
Mike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond reputeMike Marandola has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

In certain prototypes we have used a 1/2" nut driver or deep socket drill attachments just put in the drill chuck and slide over the hex. Not as robust as fixing something onto the shafts but it works in a pinch.
__________________
LUNATECS.org
FRC 316 Student 2007 - 2011
FRC 316 Mentor 2012 - 2017
FRC 316 Lead Technical Mentor 2018 - ?

Last edited by Mike Marandola : 11-09-2018 at 08:28 PM. Reason: Spelling
Reply With Quote
  #3   Spotlight this post!  
Unread 11-09-2018, 02:43 PM
ElliottB's Avatar
ElliottB ElliottB is offline
Eh... Close enough.
AKA: Elliott Budd
FRC #0045 (TechnoKats)
Team Role: Alumni
 
Join Date: Sep 2015
Rookie Year: 2015
Location: Kokomo, IN
Posts: 60
ElliottB is on a distinguished road
Re: how to drive 1/2" hex shafts with a drill?

Whenever I would make prototypes and needed to drive stuff with 1/2" hex I would just put a 1/4-20 self tapping bolt in it and then attach the drill(1/2" chuck) to the bolt head. There probably are better ways to do this, but hope this helps!
__________________


2016-Tippecanoe and Perry Meridian too with (1024,1747) Indiana semifinalists with (135,3559) Archimedes quarterfinalists with (1540,1671,236) IRI quarterfinals with (179,1806,233)
2015-2018 FRC #45 TechnoKats
2017-2018 Tech lead #45

2016-2018 FTC #11130 RoboKats
2016-2018 Founding Student and Team Captain #11130

2018-present Valpo Robotics (MRDC & Robot Football)
Reply With Quote
  #4   Spotlight this post!  
Unread 11-09-2018, 02:44 PM
artdutra04's Avatar
artdutra04 artdutra04 is offline
VEX Robotics Engineer
AKA: Arthur Dutra IV
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
Posts: 3,113
artdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

Find a 1/2" hex socket or nut driver that you can chuck into your drills.

https://www.homedepot.com/p/Milwauke...4537/203382256
__________________
Art Dutra IV
Senior Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra
Reply With Quote
  #5   Spotlight this post!  
Unread 11-09-2018, 02:44 PM
cgmv123's Avatar
cgmv123 cgmv123 is offline
FRC RI/FLL Field Manager
AKA: Max Vrany
FRC #1306 (BadgerBOTS)
Team Role: College Student
 
Join Date: Jan 2011
Rookie Year: 2011
Location: Madison, WI
Posts: 2,301
cgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

You use this thing.
__________________
BadgerBOTS Robotics|@team1306|Facebook: BadgerBOTS
2017 FIRST Championship Daly Division | 2017 Seven Rivers Regional Chairman's Award | 2017 Wisconsin Regional Dean's List Finalist (Grace Fanson)

2016 FIRST Championship Tesla Division | 2016 Wisconsin Regional Engineering Inspiration Award

2015 FIRST Championship Carson Division | 2015 Wisconsin Regional Chairman's Award

2013 FIRST Championship Curie Division | 2013 Wisconsin Regional Chairman's Award

2012 FIRST Championship Archimedes Division | 2012 Wisconsin Regional Engineering Inspiration Award, Woodie Flowers Finalist Award (Lead Mentor Ben Senson)

Reply With Quote
  #6   Spotlight this post!  
Unread 11-09-2018, 02:49 PM
Jon Stratis's Avatar
Jon Stratis Jon Stratis is offline
Mentor, LRI, MN RPC
FRC #2177 (The Robettes)
Team Role: Mentor
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Minnesota
Posts: 5,158
Jon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

My first recommendation would be to find a nearby team with a lathe and get them to turn down the end of a handful of hex shafts for you. That would give you a fixed quantity of "prototyping materials" you would be able to use.

If that didn't work, my second recommendation would be to utilize some pulleys and belts. It makes your prototypes a little more complex, but you could get a handful of pulleys mounted to hex hubs for your hex shaft, and some more mounted to round keyed hubs for the drill. Assuming your prototyping out of plywood, you would just need an extra hole at the proper spacing to support the other end of the round shaft - and you can probably get "good enough" by just stretching the belt between the two pulleys and drilling through the center of the round hub and then slopping the hole a little until everything works.

We've also done interesting things using polychord or surgical tubing as belts between two bare shafts, without pulleys. If it's stretched tight enough it can transmit some torque, but you may also see some slipping. Usually good enough for a quick prototype that needs to run all of 30 seconds before you move on to the next one. It also lets you do things like a figure 8 configuration to get the shafts spinning in opposite directions for a shooter prototype.

Edit: Do'h! A hex driver would totally be easier and more reliable in many situations.
__________________
LRI: North Star 2012-2016; Lake Superior 2013-2014; MN State Tournament 2013-2014, 2016-2018; Iowa 2017; Northern Lights 2018; Great Northern 2018-2019
Division LRI: Galileo 2016; Tesla 2017; Archimedes 2018
2015: North Star Regional Volunteer of the Year
2016: Lake Superior WFFA
Reply With Quote
  #7   Spotlight this post!  
Unread 11-09-2018, 02:54 PM
ahartnet's Avatar
ahartnet ahartnet is offline
Registered User
AKA: Andrew Hartnett
FRC #5414 (Pearadox)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2005
Location: Houston, Texas
Posts: 386
ahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

yep, go to lowes/home depot/harbor freight, and find a set of hex sockets with a 1/2" one.

Sort of related: http://www.instructables.com/id/Hand...IRST-Robotics/
__________________
Team 5414 Pearadox, Mentor (2015-Present) | Website | Facebook
Team 2936 Gatorzillas, Mentor (2011-2014)
Team 1646 Precision Guessworks, Mentor (2006-2008)
Team 451 The Cat Attack, Student Alumni (2005)
Reply With Quote
  #8   Spotlight this post!  
Unread 11-09-2018, 02:56 PM
Type's Avatar
Type Type is offline
Registered User
AKA: AJ
FRC #3452 (GreengineerZ)
Team Role: Mechanical
 
Join Date: Jan 2016
Rookie Year: 2016
Location: Michigan
Posts: 488
Type has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud ofType has much to be proud of
Re: how to drive 1/2" hex shafts with a drill?

So we use these. We used these shafts in 2017 to rotate our floor gear grabber using a seat motor, but due to the high torque and accidentally switching to 6061 aluminum, we have a large amount of shafts that are almost broken but work well for testing intakes. We did also try stainless at one point so we have a couple of those in the bunch, but I believe we went through a total of like 30 or something during season, most broke the end off before we could replace them.
__________________
3452- Lead Builder/ Pit Boss




*My posts do not reflect the opinion of my team*

Last edited by Type : 11-09-2018 at 02:58 PM.
Reply With Quote
  #9   Spotlight this post!  
Unread 11-09-2018, 03:06 PM
Mr V's Avatar
Mr V Mr V is online now
Registered User
FRC #5588 (Reign)
Team Role: Coach
 
Join Date: Feb 2011
Rookie Year: 2009
Location: Maple Valley Wa
Posts: 1,241
Mr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond reputeMr V has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

You should have one of these https://www.homedepot.com/p/Milwauke...5031/202562858 and/or these https://www.homedepot.com/p/Milwauke...-202562857-_-N for use in your impact driver (you do have an impact driver don't you) and the 1/2" socket you already have and chuck it in your drill to get the speed you need. To janky it up a bit you can add lots of duct tape to attach the socket to the hex shaft and the socket to the adapter.
__________________
Mentor FRC #2046 Bear Metal 2009-2015 but always a Bear
Lead Coach FRC #5588 Reign 2015-
Lead Enabler Ri3d "Team Redacted" 2015-2017
FIRST Senior Mentor, Washington State, 2012-2017
FIRST Washington Assistant Fieldhouse Manager 2018-



https://www.facebook.com/pages/Team-...77508782410839
Reply With Quote
  #10   Spotlight this post!  
Unread 11-09-2018, 03:15 PM
philso philso is offline
Mentor
FRC #3103 (Iron Plaid)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2009
Location: Houston, Tx
Posts: 1,729
philso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

Wow! Thanks for all the fast answers.

I have some of these nutdrivers at home so I will bring them along on Sunday.

For the future, we can get some 1/2" hex turned down to fit a drill chuck.

I think we might have a few pieces of churro so we can try if that fits in a 1/2" drill chuck.

Thanks also for the reminder about the old drill. I had collected a bunch of dead drills from the assembly people at my last job.
Reply With Quote
  #11   Spotlight this post!  
Unread 11-09-2018, 03:26 PM
s-neff's Avatar
s-neff s-neff is offline
Registered User
AKA: Sam
FRC #0841 (Biomechs)
Team Role: Mentor
 
Join Date: Apr 2016
Rookie Year: 2009
Location: California
Posts: 251
s-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond reputes-neff has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

Quote:
Originally Posted by ahartnet View Post
My students built one of these, and then let out the magic smoke with too high a duty cycle on the SLA robot battery.

To replace it I got my hands on a bunch of new 12v lion drills (on sale), and cut all the heads off. Benefits include this way our prototype mechanisms are power-limited until we drop them onto a chassis... implicit power-budgeting. https://www.amazon.com/Black-Decker-.../dp/B0111N8L7I

(We held onto the heads for offseason activities.)
__________________
Mentor - Team 841 (2015 - ? )
Mentor - Team 4 (2013 - 2014)
Student - Team 192 (2009 - 2010)
"Remember why you're doing this." -mrnoble
Reply With Quote
  #12   Spotlight this post!  
Unread 11-12-2018, 02:50 AM
marcellui's Avatar
marcellui marcellui is offline
Registered User
AKA: Marcel
FRC #0610 (Crescent Coyotes)
Team Role: Mechanical
 
Join Date: Feb 2017
Rookie Year: 2016
Location: Toronto
Posts: 10
marcellui is a glorious beacon of lightmarcellui is a glorious beacon of lightmarcellui is a glorious beacon of lightmarcellui is a glorious beacon of lightmarcellui is a glorious beacon of lightmarcellui is a glorious beacon of light
Re: how to drive 1/2" hex shafts with a drill?

i normally just cut the shaft like 1 or 2 inches longer, and from those 1 or 2 inches lathe off 0.25in or more from the diameter of the stock so that you can stick it in the drill chuck.

if you have some sort of milling machine, you could also probably shave off like a bit on each face of the hex shaft, that might work too.

best of luck
__________________
2016 - Current | Team 610 Crescent Coyotes


My views and opinions do not necessarily reflect those of my team.

Last edited by marcellui : 11-12-2018 at 02:52 AM.
Reply With Quote
  #13   Spotlight this post!  
Unread 11-13-2018, 06:52 PM
ClayTownR's Avatar
ClayTownR ClayTownR is offline
Registered User
AKA: Clayton
FRC #0100 (The WildHats)
Team Role: CAD
 
Join Date: Dec 2016
Rookie Year: 2015
Location: California
Posts: 196
ClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud ofClayTownR has much to be proud of
Re: how to drive 1/2" hex shafts with a drill?

We didnít like having to turn down every shaft we used, so we made a one-time tool for every time. Itís just a short hex shaft which has been turned down on the end with a 2Ē spacer in the hex end. We drilled through both the space and the hex shaft then screwed the two together. So far, itís handled many seasons of abuse and is dead easy to use.
__________________
FTC 4800, 2015-2017
FRC 100, 2016-
Reply With Quote
  #14   Spotlight this post!  
Unread 11-14-2018, 08:20 AM
philso philso is offline
Mentor
FRC #3103 (Iron Plaid)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2009
Location: Houston, Tx
Posts: 1,729
philso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond reputephilso has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

Quote:
Originally Posted by ClayTownR View Post
We didnít like having to turn down every shaft we used, so we made a one-time tool for every time. Itís just a short hex shaft which has been turned down on the end with a 2Ē spacer in the hex end. We drilled through both the space and the hex shaft then screwed the two together. So far, itís handled many seasons of abuse and is dead easy to use.
That sounds cool. What spacer did you use? Do you have a photo you can share?
Reply With Quote
  #15   Spotlight this post!  
Unread 11-14-2018, 11:24 AM
ahartnet's Avatar
ahartnet ahartnet is offline
Registered User
AKA: Andrew Hartnett
FRC #5414 (Pearadox)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2005
Location: Houston, Texas
Posts: 386
ahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond reputeahartnet has a reputation beyond repute
Re: how to drive 1/2" hex shafts with a drill?

I imagine they are referring to this spacer (217-3265) on this page: https://www.vexrobotics.com/acetalspacers-vexpro.html

Neat idea! this is however pretty just a home brewed nut driver. It's advantage I could see would be a deeper socket
__________________
Team 5414 Pearadox, Mentor (2015-Present) | Website | Facebook
Team 2936 Gatorzillas, Mentor (2011-2014)
Team 1646 Precision Guessworks, Mentor (2006-2008)
Team 451 The Cat Attack, Student Alumni (2005)
Reply With Quote
Reply


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 06:34 PM.

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


Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi