You may find that you can not locate a replacement 134 motor as it does not seem to be listed in common NEMA frame charts based upon a quick look, so you may not have a choice but to carefully measure the motor and then locate the closest modern equivalent and then create a suitable adapter plate for such. The "Z" signifies something nonstandard about the shaft, this may be length, diameter, how the shaft is keyed, etc. You will also wish to match the frame specification (134Z) and shaft diameter and shaft length to ensure a drop in replacement for the new motor without needing to engineer adapter plates to mount it. Most induction motor driven tablesaws tend to run the blade in the vicinity of 3600RPM, give or take a bit, so it is most common to use a nominal 2-Pole/3600RPM motor (some will label this as ~3450 RPM, give or take, to account for magnetic flux slip under load as 3600 RPM is the no-load synchronous speed) since anything slower means more tension and slip forces on the belt so it is easiest to just engineer things for minimum stresses since such motors are readily available. Eliminating a likely unnecessary three phase converter/VFD reduces your points of failure to just that of the motor itself with no reduction in available power at the saw.
![unisaw motors unisaw motors](https://storage.bhs.cloud.ovh.net/v1/AUTH_e7d15450bedd40b9b599e075527df3cb/flint/fVintage_Delta_Unisaw__10quot_Table_Saw___5deeb5052452f.jpg)
![unisaw motors unisaw motors](https://images.homedepot-static.com/productImages/3ab9e8ad-4ba6-4216-9ab7-a874d70fd07c/svn/delta-stationary-table-saws-36-l552d-64_1000.jpg)
If you are shopping for a new motor keep in mind that there is no need to replace with a three phase replacement motor if you are running a single phase shop, allowing you to remove the three phase converter from the mix (it is a little overkill to use a VFD since there is very little need for speed control of a tablesaw under ordinary use scenarios and you would want to run it locked at, or very near, 60Hz anyhow if not using a VFD rated motor).