Rockwell RT 40 Table Saw motor options

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Forum topic by kjack48230 posted 11-26-2020 01:06 AM 230 views 0 times favorited 2 replies Add to Favorites Watch
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2 posts in 3143 days

11-26-2020 01:06 AM

Topic tags/keywords: tablesaw

So I just purchased a RT 40 and was wondering if its possible to put a single phase motor on it instead of the triple phase. Oh, also, stole it damn thing for a song, way under a grand. Need to know how big a motor I’m gonna need to properly run it. Thanks in advance.

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View Loren's profile


10929 posts in 4617 days

#1 posted 11-26-2020 01:43 AM

Delta used a proprietary motor mount on the unisaws. I don’t know if the RT 40 has the same sort of issue but it’s possible. Have a look at it.

Those saws were made in Brazil by Invicta. Perhaps Delta just badged them as they were in which case you may be lucky and find the motor mount uncomplicated.

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3991 posts in 2464 days

#2 posted 11-27-2020 02:36 PM

Single Phase possible? yes
Check your current motor frame size and mount. Those saws use standard base plate flange mount, and are easy to change (excluding the weight). The RT40 motor hangs upside down on base plate .vs. older Rockwell that hung sideways. Expect you will find a 213/215 frame motor with 1-1/8” shaft, weighing over 75lbs; so be safe changing it out.

The RT40 were commonly sold with 5HP & 7.5HP motors. Newer Delta models offer a 10HP option, likely for folks spinning the 2” wide 12” OD dado blades with extended arbor. The arbor on the 12/14” saws is removable, and there are different sizes. Check your arbor closely before buying blades. Some models would support a 5/8” saw arbor, and run 8-10” blades on that machine. Which also means a 3HP motor could be used, if not sawing the 4” thick timber intended to run on that monster 14” saw blade. :-)

If you have a 5HP 3PH motor, you will find it cheaper to buy a VFD; than buy a new 5HP motor. There are many threads on using VFD with 5HP motors if you want more information.

Best Luck.

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

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