Question about Delta Rockwell 37-220 Jointer

[Scott Cardais]

I recently purchased a used Delta Rockwell jointer,

The seller wasn't sure of the model number but after some research this morning, I think it's Model 37-220. See photo. Can anyone confirm the model number?

Also, I could use some help determining the speed at which the cutter head should be turning.

I'm using a 1 1/2 hp Delta motor with 3,450 rpm. When I first got the jointer, the motor had a 2" diameter pulley and the jointer rotor had a 3" diameter pulley. With the setup, the RPM of the cutter head was far too slow. I reversed the pulleys (3" on the motor, 2" on the jointer). This increased the rpm of the cutter head but I still think it should be faster.

Without the manual, I'm not sure what the rpm of the cutter head should be and therefore what the proper pulley configuration should be.

Can anyone out there offer some suggestions?

Thanks,

Scott C.

[Alex Shanku]

Here is a useful tool that may help you.

http://www.owwm.com/math/cpm.aspx

[glenn bradley]

Here's a parts diagram that may help get you started: http://www.mikestools.com/download/Delta-Parts-Lists/37-220-6-INch-Jointer-J2B.pdf

and OWWM: http://www.owwm.com/photoindex/detail.aspx?id=3699

but wait there's more; Google is your friend: http://www.owwm.com/photoindex/detail.aspx?id=9335

[Scott Cardais]

Thanks Alex and Glenn.

The "cuts per minute" calculator was interesting. I've been to the OWWM photo index and that's why I think I have Model 37-220 but I just wanted to confirm with this group if possible.

Just to clarify my questions:

1. Does anyone know what the RPM should be at the cutter head? What's safe and what's effective? Based on what's safe, I'll modify my pulley arrangement to obtain the proper rpm.

2. If anyone out there has a Delta Rockwell 37-220, can they confirm that's what I have based on the photos I uploaded?

Thanks very much for any and all help.

Scott C.