I've gotta Rockwell abrasive belt finishing machine (6x48 belt sander model
31-520) and I want to change a 3 phase motor out to a single phase. The
original Rockwell (Baldor) motor that I pulled out does not have any info on
the frame number. Anyone have one of these or knows what frame number I
need? I know I can take it to a local motor shop but I'd like to shop it on
the web to know what to expect to pay before I do that.
There are catalogs on the OWWM site.
Later catalogs list the recommended motors and specs on
Light a man a fire and he will be warm all day. Light a man
afire and he will be warm the rest of his life.
I took a look on OWWN and they do list Rockwell/Delta part numbers, but no
specs including frame number. I should have stated that I am looking for a
replacement that is not necessarliy a Rockwell motor as I have seen they
tend to be pretty expensive. That is why I'm looking for the general specs
on the motor, which I've found all but frame info.
The link below is to a NEMA Quick Reference Guide for the various frame
dimensions. It should help.
Buffalo, NY - USA
(Remove "SPAM" from email address to reply)
Hmmm? 1968. A very good year for Delta machinery.
Let's look at the ancient text.
Looks like you have a semi-proprietary mounting pattern.
The Delta catalog calls the motors out as being either a
No. 6 or a No. 8 1/2 (Delta mounting patterns).
You have a couple of choices. Drill the cabinet (not too
big a deal really) or make a pad to go between the motor and
the cabinet base (an inbetweener) with some T-nuts facing
one way to match the hole pattern in the new motor (any 1
horse 3450 rpm will do) and T-nuts going the opposite way to
match the holes in the cabinet.
Sorry. Wishing it was easier. On the other hand, you do
have one of the finest 6" X 48" belt finishers money
By the way, you Kevin Conway the actor?
I sent you an e-mail yesterday saying that I would check out my motor
size. I didn't actually look at the frame number, It was in a
difficult position to read. However, it appears to be the same size as
my original band saw motor, which I believe to be a 66Y frame type.
They are both double ended, with cover nipple on opposite end. It
makes it easy to reverse the rotation. On three phase motors, swapping
any two leads will acheive the same thing.
They are slightly larger than todays norm. It didn't cause any problem
when swapping my band saw motor. I just boosted it up slightly higher
to make up for the difference. As I have not pulled the pulley, I
don't know the shaft size. My band saw was 3/4" and now is 5/8". They
make bushings to adapt the larger pulley to the smaller shaft. I don't
think it works quite as well in the opposite direction.
Anyway, my motors are Rockwell/Marathon, not Baldor. My point is that
you probably don't need to be overly concerned with getting the exact
size as long as you don't go bigger than your stand can handle. There
is plenty of room to play with when you are using belt driven
machinery. (To the best of my knowledge)
I hope that this helps.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.