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.
KC
"Kevin Conway" <[email protected]> wrote in message news:<[email protected]>...
> 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.
>
> KC
Kevin,
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.
Eric Tuck
Kevin Conway wrote:
> 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.
>
> KC
The link below is to a NEMA Quick Reference Guide for the various frame
dimensions. It should help.
http://www.marathonelectric.com/motors/manuals/SB371/back.pdf
--
Jack Novak
Buffalo, NY - USA
(Remove "SPAM" from email address to reply)
Kevin Conway wrote:
>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's understood but later Delta and Rockwell machines used
the same NEMA standards as others.
>That is why I'm looking for the general specs on the motor, which I've found
>all but frame info.
What is the serial number of the machine?
UA100
By the way, how does the ancient text decipher the serial number DW3385 =
1968?
KC
"Unisaw A100" <[email protected]> wrote in message
news:[email protected]...
> Kevin Conway wrote:
>>The serial number is DW3385.
>
>
> Hmmm? 1968. A very good year for Delta machinery.
>
> Let's look at the ancient text.
>
> Ouch!
>
> 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
> could/can buy.
>
> By the way, you Kevin Conway the actor?
>
> UA100
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.
KC
"Unisaw A100" <[email protected]> wrote in message
news:[email protected]...
> There are catalogs on the OWWM site.
>
> http://owwm.com/MfgIndex/Publications.asp?ID=1141
>
> Later catalogs list the recommended motors and specs on
> later pages.
>
>
>
> 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.
>
> UA100
An inbetweener sounds the easiest at this point. The present motor is
1725RPM, I would imagine that is key to keep from buring the wood, not
3750RPM?
Sadly, no; no acting skills here.
KC
"Unisaw A100" <[email protected]> wrote in message
news:[email protected]...
> Kevin Conway wrote:
>>The serial number is DW3385.
>
>
> Hmmm? 1968. A very good year for Delta machinery.
>
> Let's look at the ancient text.
>
> Ouch!
>
> 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
> could/can buy.
>
> By the way, you Kevin Conway the actor?
>
> UA100
Kevin Conway wrote:
>An inbetweener sounds the easiest at this point. The present motor is
>1725RPM, I would imagine that is key to keep from buring the wood, not
>3750RPM?
The OEM motor is reputed to be 3750. Probably you have a
different set of pulleys.
>Sadly, no; no acting skills here.
Too bad. The money comes in handy from time to time.
UA100
The OEM motor I took out, which I still have says its 1725RPM...I assume it
OEM, its a Rockwell (Baldor) motor, 3ph/220V.
KC
"Unisaw A100" <[email protected]> wrote in message
news:[email protected]...
> Kevin Conway wrote:
>>An inbetweener sounds the easiest at this point. The present motor is
>>1725RPM, I would imagine that is key to keep from buring the wood, not
>>3750RPM?
>
> The OEM motor is reputed to be 3750. Probably you have a
> different set of pulleys.
>
>>Sadly, no; no acting skills here.
>
> Too bad. The money comes in handy from time to time.
>
> UA100
Kevin Conway wrote:
>The serial number is DW3385.
Hmmm? 1968. A very good year for Delta machinery.
Let's look at the ancient text.
Ouch!
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
could/can buy.
By the way, you Kevin Conway the actor?
UA100
The serial number is DW3385.
KC
"Unisaw A100" <[email protected]> wrote in message
news:[email protected]...
> Kevin Conway wrote:
>>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's understood but later Delta and Rockwell machines used
> the same NEMA standards as others.
>
>>That is why I'm looking for the general specs on the motor, which I've
>>found
>>all but frame info.
>
> What is the serial number of the machine?
>
> UA100