I'm just looking to get a new motor for the head on my Omnimil so I can run it on a inverter drive. I measured up the spacing for the bolts for the foot mounts and set off to look for a suitable motor (85mm long, 143 mm wide)
Looking at what is available, they all seem to use a different spacing, albeit consistent across the 0.55kw I'm looking for - now I have an adapter I can use, but, it got me thinking as to why the spacing has changed, or whether I'm looking at the wrong thing with respect to the frame ID.
I'm guessing there has been an international standard for motors developed since the 1960s, but does that mean if you are to replace a motor on an old machine, that you will always need an adapter?
I'm not bothered like I say, but I couldn't come across anything on my Google search which explains it, so it's more out of interest than anything else.
Looking at what is available, they all seem to use a different spacing, albeit consistent across the 0.55kw I'm looking for - now I have an adapter I can use, but, it got me thinking as to why the spacing has changed, or whether I'm looking at the wrong thing with respect to the frame ID.
I'm guessing there has been an international standard for motors developed since the 1960s, but does that mean if you are to replace a motor on an old machine, that you will always need an adapter?
I'm not bothered like I say, but I couldn't come across anything on my Google search which explains it, so it's more out of interest than anything else.