IEC motor shaft sizes
IEC motor shaft sizes
(OP)
Hello,
I work for a machinery OEM. For years we've worked with NEMA motors and managed our production bills of materials based on NEMA frame size. This ensured the keys, couplings, and adapters fit correctly for every machine.
We've recently begun working with IEC motors, mostly D-flange. For frame sizes 225 and up, we're seeing different shaft and keyway dimensions depending on the manufacturer. So we purchased IEC 72-1 (for $340, $5.49 per page written in English) and found nothing to suggest that shaft and keyway dimensions are standardized.
Please tell me there is more to this; that I'm missing something. I'd rather not think about life without standarized motor dimensions.
I work for a machinery OEM. For years we've worked with NEMA motors and managed our production bills of materials based on NEMA frame size. This ensured the keys, couplings, and adapters fit correctly for every machine.
We've recently begun working with IEC motors, mostly D-flange. For frame sizes 225 and up, we're seeing different shaft and keyway dimensions depending on the manufacturer. So we purchased IEC 72-1 (for $340, $5.49 per page written in English) and found nothing to suggest that shaft and keyway dimensions are standardized.
Please tell me there is more to this; that I'm missing something. I'd rather not think about life without standarized motor dimensions.





RE: IEC motor shaft sizes
thread404-316919: Shaft key calculation
Mechanical engineering other topics Forum
See also:
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RE: IEC motor shaft sizes
David
RE: IEC motor shaft sizes
See:
http
You may use a software as "eassistant" for instance :
http://www.eassistant.eu/en/eassistant.html
ht
RE: IEC motor shaft sizes
Sorry the help has come after you've spent a lot of money on the IEC document.
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If we learn from our mistakes I'm getting a great education!
RE: IEC motor shaft sizes
RE: IEC motor shaft sizes
Scotty, BS EN 50347 sounds like a good option. Especially considering that we are purchasing the motors to the UK and shipping the completed machines from the UK. Do you know if that standard is accepted outside of the UK? For example, would Siemens, ABB, etc follow this standard?
David
RE: IEC motor shaft sizes
It's a European Norm, hence the 'EN' designation, so I would expect the major European (IEC) motor manufacturers to conform to that standard. Certainly can't hurt to ask them.
Mike - why would I do that? So many nice places to go instead...
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If we learn from our mistakes I'm getting a great education!
RE: IEC motor shaft sizes
One question if I may impose even further: the BS/EN standard mentions IEC 60072-1 as a cross-listing. If you have access to this standard, could you please confirm that it declares a single shaft diameter for each IEC frame size? Is it within that "standard", or part of a non-binding annex? I would really rather know with more certainty before I request purchase of another document.
David
RE: IEC motor shaft sizes
DIN EN 50347
General purpose three-phase induction motors having
standard dimensions and outputs - Frame numbers 56
to 315 and flange numbers 65 to 740
But, pay attention it is only for GENERAL PURPOSE motors !
There is a DIN standard for cylindrical shaft dimensions :
Cylindrical Shaft Ends; Dimensions, Nominal Transmissible Torques
DIN 748-1
RE: IEC motor shaft sizes
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If we learn from our mistakes I'm getting a great education!
RE: IEC motor shaft sizes
We use only 4- 6- or 8- pole motors: does EN 50347 specify a shaft size for frames above 200L in this case?
Thanks again,
David
RE: IEC motor shaft sizes
2 pole
250M - 60mm
280S - 65mm
280M - 65mm
315S - 65mm
315M - 65mm
4/6/8-pole
250M - 65mm
280S - 75mm
280M - 75mm
315S - 80mm
315M - 80mm
Hope this helps a bit.
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If we learn from our mistakes I'm getting a great education!
RE: IEC motor shaft sizes
RE: IEC motor shaft sizes
David
RE: IEC motor shaft sizes
I've seen a few US airports, but have so far only managed to actually enter the US at Orlando (with work), Vegas (with fiance) and Hawaii (with then-new wife). Liked all of them.
David,
Not a problem, nice to be able to lend a hand. A lot of people here have been unknowingly teaching me for years.
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If we learn from our mistakes I'm getting a great education!
RE: IEC motor shaft sizes
Baldor = No
ABB = Yes
WEG = Yes
Siemens = Yes In fact they mention EN 50347.
This was limited to 4/6/8 pole, AC, general purpose motors ranging from IEC 250M to 315M. YMMV.
David