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Delta Rockwell Press not spinning

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Forum topic by PaAnn posted 03-30-2020 11:13 PM 287 views 0 times favorited 10 replies Add to Favorites Watch
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PaAnn

2 posts in 64 days


03-30-2020 11:13 PM

Topic tags/keywords: broken drill press question turning

Hello,
I’m new to woodworking and this blog. I have only turned a few pens thus far. Mu press stopped spinning. The belt is not broken. I hear a rattle at times too in the motor. It’s a Delta Rockwell Press catalog number 11-280 with a Dunlap 1/3 horsepower 1953 motor, model 115 7324 Sears Roebuck and Co Type SW140. I cleaned it up on the as best I can but I did not take it apart for fear I would not get it back together. I like this press because it’s old and used. I would prefer to not purchase a new drill press. I only paid 50. It’s beautifully mounted on wooden base with wheels. Any ideas where I might have the motor repaired or a good site for repair work videos? I’m not afraid to try and repair this myself but I would need to watch a video or two for some guidance. Thanks for you time and any input. Patty


10 replies so far

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MrUnix

8005 posts in 2935 days


#1 posted 03-31-2020 03:03 AM

Are you saying that your drill press motor isn’t working? Well, the good news is that you can put just about any motor you want on that drill press – so you are not locked into the one on there now. You certainly don’t need to go out and buy a new drill press, and the one you have is a really nice keeper. As for your motor, you really need to do a little troubleshooting first. What exactly does it do when you flip the switch? Does it move at all? Does it make any humming noise? You say you heard a rattle – which doesn’t tell us much. Are you sure it’s getting voltage when you flip the switch? Could just be a switch problem. Let us know a bit more. Fortunately, motors are pretty simple devices, so unless you let the magic smoke out of yours, you should be able to get it running again.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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WoodES

174 posts in 2427 days


#2 posted 03-31-2020 03:57 AM

Make sure your new motor arbor size matches the existing arbor diameter. Then you can reuse the pulley on the existing motor, otherwise the pulley hunt can be a pain. BTDT….

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PaAnn

2 posts in 64 days


#3 posted 03-31-2020 04:00 PM

Hello,
Thank you for reply and your time. I am happy to hear that you don’t believe I need to purchase a new press. I have become attached to this press already :) The motor does turn on when I flip the switch on. The press is spinning it is just spinning very, very, very slowly. It seems as though the motor is trying extra hard to turn the belt but it never gains enough strength to speed up the turning. Slow, slow motion. At times it spins so very slow then increases a tiny, tiny bit … like it’s trying? I tried to post a video but I have not figured that out yet. (I have been reading the blogs on this site to help me do that) I have not replaced the belt but assume it’s old so I will. The rattle I hear may simply be vibration of the entire press but I do believe I hear an “occasional” rattle that seems distinct almost like a loose coin bouncing in the motor (not consistently). Truth of the matter is that the rattle could have been there in the past and I simply didn’t notice it because the press was working fine. I have to go to a machine shop for a different issue. I bought a brand new lathe (jet 1220 vs oct 2019) and it’s dropping rpm’s. I am going to have it checked out professionally since it’s covered under warranty. When I’m there I’ll show them my video of the press in action and perhaps they can provide a little advice. Thanks again for your time and input. I truly do appreciate it! Kind regards, Patty :)

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Steve

1979 posts in 1319 days


#4 posted 03-31-2020 04:15 PM

Is the pulley loose from the motor shaft?

can you take some pics or post a video of your issue?

View tvrgeek's profile

tvrgeek

946 posts in 2386 days


#5 posted 03-31-2020 04:24 PM

Look into the cool mods of using a treadmill motor. Electronic speed control. Maybe someone took out a good induction motor for conversion and you can get one of those cheap.

There should not be much rattling around in the morot except the inertia switch that takes the start winding out of the circuit. If it is not working, then what do you have to lose tearing into it? At worst, you learn something.

Of course, be sure it is the motor end. Probably. Not much else to one but a couple of beatings on the spindle.

View GR8HUNTER's profile

GR8HUNTER

7431 posts in 1449 days


#6 posted 03-31-2020 04:31 PM

could be a centrifugal switch :<))

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View BlasterStumps's profile

BlasterStumps

1638 posts in 1176 days


#7 posted 03-31-2020 08:04 PM

This is a wild guess type response to this slow speed but, if you have an open neutral on your electrical service you can have one leg have low voltage and the other have higher than normal voltage. All it takes to rule this possibility out is to check voltage on that leg of the service with load on it. An open neutral can happen on a urd type of cable if it is faulted or an overhead connection goes bad.

-- "I build for function first, looks second. Most times I never get around to looks." - Mike, western Colorado

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MrUnix

8005 posts in 2935 days


#8 posted 03-31-2020 09:58 PM

I am happy to hear that you don’t believe I need to purchase a new press. I have become attached to this press already :) The motor does turn on when I flip the switch on. The press is spinning it is just spinning very, very, very slowly. It seems as though the motor is trying extra hard to turn the belt but it never gains enough strength to speed up the turning. Slow, slow motion. At times it spins so very slow then increases a tiny, tiny bit … like it’s trying?
- PaAnn

Steve brings up a good point… is the motor pulley loose, allowing the motor shaft to spin without turning it? A video would be very useful if you can figure out a way to let us see it.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View ibewjon's profile

ibewjon

1537 posts in 3530 days


#9 posted 03-31-2020 11:43 PM

The belt may be stretched. If the motor pulley is tight on the shaft, try a new belt. If there is an open neutral in your incoming electrical system, you would have no 120v anywhere in the house. Nothing but the 240 systems would work. ( Air conditioning and electric heat, electric stove and electric dryer)

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BlasterStumps

1638 posts in 1176 days


#10 posted 04-01-2020 12:04 AM

Jon, here is a video link showing what I was referring to. A lot of electricians and even some utility linemen have not seen this but it is a real scenario. I worked as a utility lineman for a number of years. I had to troubleshoot this scenario several times over that period of years. Must apply load or you won’t see it properly. Notice this guy uses the lights as load. This is a rare but real possibility for URD where the neutral is faulted.

As far as the OP’s issue, not sure if his belt is the culprit or pulley loose but what made me make my original comment was the lathe loosing RPMs also.
https://www.youtube.com/watch?v=v9q3EnrHngo

-- "I build for function first, looks second. Most times I never get around to looks." - Mike, western Colorado

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