Bearings For Peerless MST-205

So through my job I was able to find bearings for my peerless .the transaxles come with a cutout wich I assume is for bearings and the measurements I got were 20mmborex40mmODx12mmW.  

A little more detail on this might be a good idea. On the surface, the bearings you need are a reasonable common metric size. On the other hand, you indicate an ID of 20mm which isn't actually correct for a 3/4" shaft size (assuming you are indicating that they are for the axleshafts). 3/4" is 19.05mm. While a 20mm bearing bore will fit on a 19mm shaft, it's technically sloppy.

While we're here, I was recently inside a Peerless 930 and found (unused) cast cavities on each axleshaft where bearings could go, but weren't. I was able to fit some bearings from an 800 for additional axleshaft support. Is this the sort of thing you're referring to?

More detail please. Thank you.

Doc Sprocket wrote:

A little more detail on this might be a good idea. On the surface, the bearings you need are a reasonable common metric size. On the other hand, you indicate an ID of 20mm which isn't actually correct for a 3/4" shaft size (assuming you are indicating that they are for the axleshafts). 3/4" is 19.05mm. While a 20mm bearing bore will fit on a 19mm shaft, it's technically sloppy.

While we're here, I was recently inside a Peerless 930 and found (unused) cast cavities on each axleshaft where bearings could go, but weren't. I was able to fit some bearings from an 800 for additional axleshaft support. Is this the sort of thing you're referring to?

More detail please. Thank you.

This is the bearings im getting . I just want to give it some more support like you said so its not just running only on the rubber seals.

http://www.motionindustries.com/motion3/jsp/mii/product/00051807/NSK+6203-12+ZZ+C3+3%2F4%22+x+40+mm+x+12+mm+Shielded%2C+Both+Sides%2C+Deep+Groove+Ball+Bearing/en?category=Bearings%3EUnmounted+Bearings%3EBall+Bearing

Actually just purchased some from ebay for like 2$ each