5/16" cold steel shafts...

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Posted by Anton Abaya at 1/20/2001 12:36 AM EST


Coach on team #419, Rambots, from UMass Boston / BC High and NONE AT THE MOMENT! .



just a quick question...

we are planning to use these shafts for our drivetrain. Basically, we're mounting a bunch of wheels to it, and I was just curious if you guys have experience with these shafts bending....

we were tempted to get the hardened ones.... but we figured we wanted to drill some holes in them to pin them or something like that later on.... the machinist said he didnt like hardened ones... heh..

are these shafts strong enough? we dont expect to make them long and might support them only on one side due to the current design.

tips?
-anton
"when something itches, you must scratch it." -my chin

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Posted by Ken Leung at 1/20/2001 1:04 AM EST


Student on team #192, Gunn Robotics Team, from Henry M. Gunn Senior High School.


In Reply to: 5/16" cold steel shafts...
Posted by Anton Abaya on 1/20/2001 12:36 AM EST:



You are going to want to support these shafts from both sides... seriously, they WILL bend if only support one side, especially when you are using them on the drive train where a lot of forces go through.

And even with the hardened one's, you want to watch the size of the pin comparing to the size of the shaft. You don't want the diameter of the pin bigger then 1/3 diameter of the shaft, or that will weaken the structure of the shaft a lot... I really go against using pins on those shafts. We usually shafts like these when we want our wheels spinning freely on them, and a chain system to drive the wheel instead of direct powering from the shaft to the wheel.

[archiver]

Posted by Anton Abaya at 1/20/2001 2:24 AM EST


Coach on team #419, Rambots, from UMass Boston / BC High and NONE AT THE MOMENT! .


In Reply to: Re: 5/16" cold steel shafts...
Posted by Ken Leung on 1/20/2001 1:04 AM EST:



aye...i agree with ya.

the only shafts we'll have i expect are the ones connected straight to the motor from which sprockets will drive the wheel sprockets via a chain system.

do you really think they'll bend? hmmm.... lemme think of a solution then. we wanted a rather open wheelbase...

-anton

[archiver]

Posted by Anton Abaya at 1/20/2001 2:31 AM EST


Coach on team #419, Rambots, from UMass Boston / BC High and NONE AT THE MOMENT! .


In Reply to: Re: 5/16" cold steel shafts...
Posted by Ken Leung on 1/20/2001 1:04 AM EST:



aye...i agree with ya.

the only shafts we'll have i expect are the ones connected straight to the motor from which sprockets will drive the wheel sprockets via a chain system.

do you really think they'll bend? hmmm.... lemme think of a solution then. we wanted a rather open wheelbase...like a car or something.

-anton