Motor shaft fabrication 2

[Sparweb]

I am looking at 3-phase motors for a project. The budget dictates that I consider motors made overseas by brand names that don't have "Baldor" in them.
The standard flea-bay purchasing caution is in effect.

When I see a motor such as this (see photo below) I am not sure I understand what I'm looking at. Two curiosities jump out at me:
[ul]
[li]The key on the shaft seems to be "one piece". Could the shaft of this motor be CAST??[/li]
[li]The shaft seems to have a bored-out center. What should I expect here?[/li]
[/ul]

If it helps, the subject motor is 3-phase, 5PH, 1770 RPM, 230/460V, 60Hz in a TEFC 184T cast frame.

http://www.sparweb.ca

 

[electricpete]

The shaft seems to have a bored-out center. What should I expect here?

A threaded hole in end of the shaft could possibly be used for lifting rotor during assembly, but more likely is intended as part of the means for securing a fan wheel directly to the motor shaft.

The key on the shaft seems to be "one piece". Could the shaft of this motor be CAST??

I've never seen a key built into a shaft like that. Weird.


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(2B)+(2B)' ?

 

[edison123]

The black thingy is a removable plastic cover that keeps the key in the shaft and protects against transport damage. You can see the steel shaft at the end with the thread at the shaft center, which is for lifting the rotor vertically for core stacking etc.

Muthu

http://www.edison.co.in

 

[Sparweb]

removable plastic cover

Oh! Consider my forehead slapped! It's so obvious now.
I'm old enough to remember seeing them dipped in wax.

http://www.sparweb.ca