There's nothing easier than swapping the motor out on a jointer. If the bolt holes on the base of the new motor line up, that's about all that's needed. A different length belt might be necessary also if there's not enough slot length. The switch will be the next issue and a double pole 220 Volt will work. No need for a magnetic type in a one man shop. If the power drops and then comes back on while you're jointing you should have enough time and foresight to turn it OFF before it restarts.
There's no need for a varible frequency drive on a jointer which operates at a fixed RPM. Try to match the new motor RPMs with the same as the original and then you can keep the pulley diameters the same. If not, there are great "on line pulley" calculators. I've done a lot of motor swaps over the years, so I'm not too intimidated by them.
I wouldn't use any motor less than 2 HP, preferrably a 3 HP. My 8" Grizzly had a 2 HP, and seemed fine however. My 13" jointer/planer has a 3 HP for the extra width.
New "take off" motors are available on Ebay:
Great for many machines! 3 HP Single phase. 22mm Shaft With 2 Step Pulley. Can you afford to buy a motor from anyone else?. We will work it out.
www.ebay.com
Good price on this new one:
Find many great new & used options and get the best deals for WEG 00318EP3E182T 3 Phase Motor 3hp (2.2kw) TEFC 1740 RPM 182t Frame at the best online prices at eBay! Free shipping for many products!
www.ebay.com