Just bought a pm221 has a 15hp 3 phase motor which I plan to use to build a phase converter then I'll put a 10 ish horse on the planer. But for now I'm going to put a 13hp gas motor on it and need to order a new pulley for it. Online it says that planer head should spin at 4800rpm. The gas motor is 3600rpm. So the pulley needs to be 1.3333 times bigger than the pulley on the planer head? That math seem right to all you guys?
Whats the speed of the original motor? 3450?
The motor that's on there now is 1750 I believe. It is not the original motor for the machine though. But the pulley ratio is 2.36 to 1. Giving it a head speed of 4100 rpm ish.
Then yes, sounds right to me.
This might help;
Pulley Calculator (forestryforum.com) (https://forestryforum.com/members/donp/pulleycalc.htm)
You can be off by a few hundred rpm, it really doesn't matter that much.
I think going from 15 HP 3 phase to 13 HP gas is really going to disappoint you. She won't have any torque to call up when you hit thick spot.
Well I've never ran the planer so I don't know how well it functions with the 15hp motor. But 15hp seems overkill in my mind for a 20" planer. But my plan isn't to keep the 13hp gas motor it is just the easiest way to get the planer functional at the moment.
I agree that 15 horse is overkill. 5 to 7 is probably sufficient for an electric motor.
I think new, that planer came with a 7.5 hp motor. My 16 inch powermatic has a 5 hp, and it has plenty of power.
I just looked at mine. Yes 7.5 hp , 3 phase. Mine is also a 221.
Perfect thanks for all the responses. That pulley calculator is pretty nifty.
My 225 has a 7.5 hp 3450 rpm direct drive.
I found an old advertisement on the planer. The max it was offered was with a 10 up electric.
Does the 221 have a separate feed motor, if it does how are you going to run it.
It does have a separate feed motor I haven't looked at the plate on it but I'm hoping it's single phase and I'll just wire it to a plug for now. If not I have some smaller single phase motors that I can bolt up to it.
Quote from: JRWoodchuck on May 29, 2021, 12:46:06 AM
It does have a separate feed motor I haven't looked at the plate on it but I'm hoping it's single phase and I'll just wire it to a plug for now. If not I have some smaller single phase motors that I can bolt up to it.
Good chance it is 3 phase also. Do you have fwd/rev on it, if so just look at the switch and see if it is 3 phase.
My spiral head 20" has a separate feed motor and I upgraded from 5 to 10 HP 3 phase.
Still wont take a very heavy cut.
IMO never too much power (Tim the tool man)
Quote from: petefrom bearswamp on May 29, 2021, 08:20:12 AM
My spiral head 20" has a separate feed motor and I upgraded from 5 to 10 HP 3 phase.
Still wont take a very heavy cut.
IMO never too much power (Tim the tool man)
Amen!
If the feed is 3ph a VFD will phase convert and give you variable speed drive.
It does have the forward reverse switch that's a much better place to look to see if it's 3ph. Yes I agree with more is better but I am in need of a big motor for my phase converter so the 15hp will fill that position once I get around to it. Otherwise if I kept it on there I would have to get an even bigger motor for my phase converter
You guys were correct the feed motor is 3 phase so I'm just going ahead with building the phase converter and putting a 7.5 hp electric motor on it. Has anyone ever flipped the motor and put it under the base on a planer like this? It would sure shrink up the foot print and clean it up. Is heat from the motor something to worry about being under there?
I had a 16 or 18 before and mounted it on the back side. Simple, easy and less waste of space. Not sure why PM did not build them that way.
Looks like there is plenty of room under the main body to mount it in there would have to drill a new hole for the motor but I think it would mount underneath really nicely.
Does this have the big cast base?
Yes
(https://forestryforum.com/gallery/albums/userpics/41923/64ED4B27-278D-4796-8B85-97C529388EF1.jpeg?easyrotate_cache=1622778196)
(https://forestryforum.com/gallery/albums/userpics/41923/61173116-EC69-466C-860F-82F10B5B28F7.jpeg?easyrotate_cache=1622778292)
Now that is a motor!!!!! 8)
Yes, that motor needs to go bye-bye. Sold some a couple weeks ago for .32 cents a pound. Came home with a 10hp single phase that an Amish guy scraped. Paid .50 a pound for it at 192 lbs, and it runs fine.
Yeah it's a beast. I didn't realize single phase went to 10hp thought I read they topped out at 7.5hp. $100 for that motor is a deal!
Quote from: JRWoodchuck on June 04, 2021, 10:06:49 AM
Yeah it's a beast. I didn't realize single phase went to 10hp thought I read they topped out at 7.5hp. $100 for that motor is a deal!
Yes I did well on that one, win some lose some. Had a large gen I tried to sell paid 700 ended up selling head for 400. Lost some on that idea. The 10hp is a Leeson TEFC so it was a deal at $96