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Posted by Padu on December 7, 2005, 3:32 pm
Please log in for more thread options "Gordon McComb"
> Doctor Robotnik wrote:
>>
>> I am looking for a flixible shaft able to transmit forces of 4240
>> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
>> bulky so that pretty much leaves me with the option of having the
>> motors not in the arm itself. Gordon McComb this may be up your alley.
>
> Whoa! This is a fairly hefty amount of torque you need to transmit.
>
> You might try starting here. They have a handy comparison chart showing
> the max torque for the different diameters of flexible shaft they offer.
> Your application exceeds their highest maximums, even for 1/2" cable, by
> a factor of more than 10! I don't think the low RPM will make up for the
> difference. <g>
>
> http://www.wmberg.com/T05002.html
>
> I wonder if pneumatics or even small hydraulics might not be called for
> in an application such as this. Or, going from a flexible shaft to a
> more traditional pull shaft. Even 1/8" steel aircraft cable can lift a
> lot of pounds...it just can't twist that much torque.
>
> -- Gordon
May I ask what a flexible shaft is and where/how it is applied?
Cheers
Padu
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> I am looking for a flixible shaft able to transmit forces of 4240
> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
> bulky so that pretty much leaves me with the option of having the
> motors not in the arm itself. Gordon McComb this may be up your alley.