Delta DC-580 20" Planer 22-450 or 22-451 Motor Pulley

[Mitchael Flowers]

I'm searching for a motor pulley, Delta pn 1349567. It's for a DC-580 (22-450, 22-451). Delta says the part is discontinued and they have no specs or information related to the pulley, cutter or feed roller rpms. If I could find the diameters on the pulley, I could try to find one the same size or have a machine shop make one, which would likely be expensive, but an option. Does anyone have a DC-580 planer that can measure the diameters on the motor pulley or know where I may find one? Thanks for any help!

[Ronald Blue]

Do you have the V-belts that go on it or know the size? You can probably reverse engineer it to determine the size. Maybe this photo would be helpful as well. It would appear the pulley is about 3" outside diameter.

https://www.coastmachinery.com/produ.../#&gid=1&pid=3

[Bill Dufour]

Is this just a one piece pulley or is part of the reeves drive? My rockwell 12/14 saw uses a special pulley set. The groove spacing is no longer made. I believe modern ones have slightly closer spaced grooves on the four belt pulleys.
I fI had to replace one I would have to replace both. Lucky for me the motor pulley is a taper lock of a common size. So no big deal replacing the motor with a smaller shafted one.
Others have switched to serpentine belt drive.
Bill D
Bill D.

[Bill Dufour]

Probably going to be quickest to get the taper hub and a matching pulley of the correct diameter. Easier to match those two to fit rather then trying to find the correct pulley with the correct bore.
Bill D

[Bill Dufour]

You should be able to work backwards from cutter rpm or feed speeds and motor rpm. Do you know feed rates, cutter rpm or cuts per inch.
I assume motor rpm is 3,600.
Bill D.

edit: saw some info, cutter head is 5,000 rpm. fpm is 20-30
If true 5,000/3,600. is a pulley ratio of 1.38888.
If the motor pulley is 3". 3 divided by 1.38 is 2.17. That seems small. My older rockwell uses a 5" pulley on the motor for more belt wrap.

https://www.hingmy.com/site/content.php?p=150

[Mitchael Flowers]

You should be able to work backwards from cutter rpm or feed speeds and motor rpm. Do you know feed rates, cutter rpm or cuts per inch.
I assume motor rpm is 3,600.
Bill D.

edit: saw some info, cutter head is 5,000 rpm. fpm is 20-30
If true 5,000/3,600. is a pulley ratio of 1.38888.
If the motor pulley is 3". 3 divided by 1.38 is 2.17. That seems small. My older rockwell uses a 5" pulley on the motor for more belt wrap.

https://www.hingmy.com/site/content.php?p=150

I'm unsure on the type of pulley that was original to the planer, my motor has a 7/8" keyed shaft, I believe that's common so I should be able to find what I'm looking for with the info from you and some I just received. I was just able to speak with some Delta parts specialist and they confirmed the 5000rpm on the cutterhead. You are correct about the feed roller speed of 20-30fpm. I'm going to work backward to get a size. Your info just confirms I'm on the right track! Thanks!

[Bill Dufour]

Measure the diameter of the cutterhead pulley and report back. The motor pulley will be slightly smaller. The ratio of pulley diameters will be 3,600/5,000.
If the cutterhead pulley is 3.6 inches the motor will be 5 inches. From the picture I could believe the motor pulley is 5.
Bill D

[Bill Dufour]

There is more going on in that picture. That picture implies the cutterhead is spinning 1/3 motor rpm or less. Looks like the driven pulley is two or three times bigger then the motor pulley. If that is true then there must b e gears or more belts to get the rpm back up.
I would expect cutter rpm to be fixed. Any variable will be for feed rolls only.
BilLD

[Ronald Blue]

There is more going on in that picture. That picture implies the cutterhead is spinning 1/3 motor rpm or less. Looks like the driven pulley is two or three times bigger then the motor pulley. If that is true then there must b e gears or more belts to get the rpm back up.
I would expect cutter rpm to be fixed. Any variable will be for feed rolls only.
BilLD

If you're referring to the photo I linked upon looking closer there is an inner pulley that is a larger diameter and belts visible running all the way up. The outer pulley and belts must drive the feed rollers.

[Mitchael Flowers]

Measure the diameter of the cutterhead pulley and report back. The motor pulley will be slightly smaller. The ratio of pulley diameters will be 3,600/5,000.
If the cutterhead pulley is 3.6 inches the motor will be 5 inches. From the picture I could believe the motor pulley is 5.
Bill D

The cutterhead pulley is 4"(3.968" with the caliper) the motor RPM 3450.

[Mitchael Flowers]

If you're referring to the photo I linked upon looking closer there is an inner pulley that is a larger diameter and belts visible running all the way up. The outer pulley and belts must drive the feed rollers.

I can take some pictures tomorrow and show you what all is controlling the speed of the cutter and feed rollers. It's a little more than just pulleys I think. Ill try to get some pics tomorrow when I'm back at my shop.

[Bill Dufour]

I think it may have a two speed transmission driving the feed rolls.
5000/3450=1.449
4 x 1.449=5.79 motor pulley? probably 5+3/4"
I would guess within +-10-20% rpm is fine.
Bill D