I don't think anyone mentioned this but; Your original 1750 rpm motor is 4 pole and the new 3500 rpm motor is 2 pole. The 4 pole motors have more torque. You replaced that with a lower torque motor, only to make up the torque loss with the additional mechanical advantage of pulley reductions. You may have gotten more power with a bigger hp motor, but a larger hp 1750 rpm motor would have eliminated the pulley exchange.
Thanks for posting your informative video. What I really got out of it, was maintaining speed while gaining strength by controlling everything with pulleys. It's almost like mechanical advantage in reverse, sort of , I guess, oh whatever, ... it was cool to watch.
Ill be doing the exact same thing. Thanks for going through the trouble for me. I advise u add the ribs i used 1 2x4 in the middle from left to right and 3/4 ply on top and that made a big difference with the vibration. Will be adding a link belt to help reduce the vibration
Glad you found the video useful! It's been working alright for me, but I do think I'm going to have to add ribs and a link belt to cut down on vibration 👍
Hey great video. This gives me confidence that I can swap out my woefully underpowered 80s Craftsman bandsaw for rounding bowl blanks. A cool little weekend project to see if I can do it!
@@42Pursuit Just a side note. I have an old Delta contractors saw from the early 90s. I took the motor off that one and put it on the band saw. It is a 1.5 hp @ 3450 RPM. So with some different size blades and a few other accessories this should be nice saw.
HI, thank you for the video as I am about to do the same thing! Luckily my friend has a 1.5hp @1725 rpm motor so we don't need to change the pulley size.
Thank you for this video! I have an older 12" craftsman bandsaw that the 3/4 hp motor stopped starting up and even replacing the start capacitor didn't help. So I got a 1 1/8 motor from a shopsmith someone had donated to habitat for humanity for only 18 bucks btw, which was almost brand new but runs at a faster speed then the old motor so I was worried about changing it but I'll order some new pulleys and a link v belt and get it running thanks to you!
I swapped out to a 3 phase motor..with a vfd for speed control. I wanted to decrease the speed for cuting ferrous and non-ferrous metals. But strongly recommend 3 phase motor swap---
I wonder if one of those new red link pin style belts would offer less vibration as they have no "memory". What brand riser block did you use on your saw if you don't mind my asking? I have a Delta 28-276 and have been wanting to make these same changes to mine.
So glad i found this. Is your saw the 28-243? I just picked one up with the riser block but only a 1/2hp and i have a spare 1-3/4 hp motor from a table saw sitting on a shelf I was trying to figure out what to do with it.
What is your longterm assessment of this conversion? I'm tempted to do the same but am a little concerned about the reduced contact of the belt on the input pulley potentially causing slip and/or reduced belt wear. Has either turned out to be the case for you?
I haven't noticed any belt slipping. I don't believe it should be a problem if things are tensioned correctly. I'm still happy that I made the upgrade, although I didn't gain as much resaw benefit as I was hoping. Those 14-in band saws even with a riser block and more powerful motor still can't quite hang with the bigger band saws.
@@42Pursuit thanks for the reply. There’ a 3450 rpm 1.5hp motor here for cheap so I’ll give this mod a try as I can’t justify a bigger unit at the moment so I might as well get the most out of the one I have.
The motor I swapped it out with was from a table saw so already had an in-line power switch. That's not super typical so yes, I'd have needed to wire in a new on/off switch otherwise.
what do you think is the biggest motor you can get away with? i'm interested in using an old 14" band saw as a sawmill cutting up to 12" wide logs, maybe use a 7.5HP gas motor on it.
I think you can get away with any size motor so long as the pulley ratio keeps the surface feet per minute of the blade in that typical range. If you're using a 14-in that's a similar frame design to mine, I don't think you will have enough frame rigidity to do serious resawing like that. Mine can do more than it used to, but it's still takes a really long time and can't do consistent resawing on wood larger than 8" in my experience. 14" bandsaws also typically aren't designed able to fit a 3/4" blade which is much better for larger resawing operations. Something to think about.
Awesome! I'm going to try this on my saw. By the way, have you tried a link belt instead of the stock V-belt? I've found that it makes a difference in performance.
As a 25 year maintenance supervisor watching several videos on folks replacing the motors on these saws the lack of knowledge on the motors is silly. All drive motors are 1700-1780 rpm a lot of fan or pump motor ware double that. 50+ or - rpm makes no difference. That motor should never have been considered. Look at the frame size, hp, phase and rpm when replacing motors. Want more power? Add more horsepower.
Your comment is quite unclear. Why do you think that motor should never have been considered? It matches frame size, phase, and with the pulley conversion has the same output surface feet per minute.
