Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: karrotx on December 12, 2010, 01:39:36 AM
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I need to couple a semi circular shaft to a square shaft of a different size. I don't have calipers to measure the exact size but if you need that information I will buy a pair.
On the left is the DC motor shaft, on the right is the square shaft I need to connect it to. A few options I was consider is welding the two, which doesn't seem like a great idea, or milling the motor shaft down to the same shape as the square shaft.
(http://www.whatshouldwedo.org/images/shaft.jpg)
Here is the motor and shaft:
(http://www.whatshouldwedo.org/images/dcgearhead1.jpg)
(http://www.whatshouldwedo.org/images/dcgearhead2.jpg)
What are my options? I need this done as soon as possible.
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If you can mill, just make a female-female coupler: one end which accepts the half-flat motor output, and another that accepts the shaft. Drill a hole through both shafts and screw through - then it should be mechanically stable. Set screws may also work, depending on the size.
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Hi,
Depending on the power transferred, perhaps a strong and very tight fitting tube of sorts could be used. Something with a strengthening weave, as the pressure hoses used on cars for oil.
Anyway, it all depends on the application, where it's gonna be used and forces (rotational as well as lengthwise.