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post #1 of 25 (permalink) Old Jan 3rd, 17, 10:19 AM Thread Starter
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Dave
 
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Drill Press

I figured a couple of you might appreciate this. I have a 1937 vintage Craftsman Drill press that I've been using since I was a kid. It was my Dad's. I plugged it in a couple of years ago after moving and got nothing. I didn't have much time to screw with it so in the corner of the basement it went until I could buy a new motor.
Over the weekend I decided I'd give the old motor a chance and zipped it apart. It was filthy and filled with oil soaked wood shavings and probably metal shavings. The wiring had seen better days and the insulation was flaking off. I cleaned everything up, soldered on some new wires, lubed up the bearings and threw it back together. Works like new again.








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post #2 of 25 (permalink) Old Jan 3rd, 17, 10:31 AM
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Re: Drill Press

They definitely don't make them like that any more!
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1969 SS Garnet Red X55 350 Factory 4 speed
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post #3 of 25 (permalink) Old Jan 3rd, 17, 11:04 AM
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Re: Drill Press

That is sweet! Good job.
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post #4 of 25 (permalink) Old Jan 3rd, 17, 11:10 AM
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Re: Drill Press

Nice. I love when vintage stuff gets put back into use. I'd rather have that one than a brand new one. And it has sentimental value as well.
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post #5 of 25 (permalink) Old Jan 3rd, 17, 11:48 AM
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Re: Drill Press

Way better than a new one and great that you didn't need to replace the motor. I would have done the same thing in that situation.
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post #6 of 25 (permalink) Old Jan 3rd, 17, 11:51 AM Thread Starter
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Re: Drill Press

Thanks guys. I would have hated to retire that ol' girl. She's ridiculously heavy which, of course, equates to pretty daggon accurate.

'69 SS396 X66 L34 08D M21 BS
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post #7 of 25 (permalink) Old Jan 3rd, 17, 12:23 PM
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Re: Drill Press

Excellent job!
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post #8 of 25 (permalink) Old Jan 3rd, 17, 12:32 PM
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Re: Drill Press

Those old motors were notorously overbuilt. I ran into a pump just last week that a customer wanted to replace that was nameplated at 2hp. It was from 1979. When I started digging into it I couldn't find anything that would do the job for less than 5hp. Scratched my head a bit and really dug in with the customer in his office pulling the old as-built drawings from 1979 and re-did all the calcs to figure out what flow and head the thing was operating at. I had the original pump curve and the old pump so I knew what it was flow at any given head pressure but I didn't know the head pressure.

Sat down and re-created a system curve using 30 year old, 3" ductile iron pipe for my calcs. Then, for ****s and giggles, I figured out what the actual horsepower draw was. It was over 2hp!

So then I really started looking closely. I noticed it was drawing 14 amps at 208V, 3 ph. That's a LOT of amps for a 2hp motor!

Turns out this 2hp is actually a 4 hp. My 5hp pump draws 17A so they're looking into what's there now (wire size, starter size, etc) but we believe we can do a straight swap and it'll be fine.

Moral of the story here is that the actual hp of that motor is likely double what it's name plated as so if you ever do replace it you'll want to look at the amp draw.


oh and he's buying two pumps from me and replacing them both.

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post #9 of 25 (permalink) Old Jan 3rd, 17, 12:40 PM
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Re: Drill Press

Way to go

old stuff doesn't know when to quit.
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post #10 of 25 (permalink) Old Jan 3rd, 17, 12:52 PM Thread Starter
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Re: Drill Press

Quote:
Originally Posted by Gbauer View Post
Moral of the story here is that the actual hp of that motor is likely double what it's name plated as so if you ever do replace it you'll want to look at the amp draw.
oh and he's buying two pumps from me and replacing them both.
With the weight of the motor you'd think it was 10hp...

'69 SS396 X66 L34 08D M21 BS
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post #11 of 25 (permalink) Old Jan 3rd, 17, 12:56 PM
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Re: Drill Press

Quote:
Originally Posted by HawkX66 View Post
With the weight of the motor you'd think it was 10hp...
Do you have a pic of the nameplate for the motor? I can look it up and tell you what it really is.

That 2hp pump is the same size as a modern 5hp. A lot of it has to do with service factors. The old motors were usually a 2.0 SF. New ones are 1.15 SF.

So a 1 hp motor back in the day would actually put out 2hp whereas a new 1hp motor will overload at 1.15hp.


....finally a topic where I'm the expert! This is fun!


Oh and if you really wanted to keep it original you can always have the windings baked and insulated at any electric motor shop. Shouldn't be too expensive and probably the same price as buying a new motor. The bonus here is that you won't have to monkey around with trying to get a new motor with the same shaft diameter and length. In the end it might actually be cheaper to have it baked and/or repaired than replaced and you'll likely get another 75 years out of it too.

Sold:
1968 Base hardtop 250 with a P̶G̶ built 2004r
Offy intake
Holley 390 CFM carb
Langdon split header to a 2.5" exhaust
Mild cam
Custom interior
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post #12 of 25 (permalink) Old Jan 3rd, 17, 02:26 PM
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Re: Drill Press

I love old tools like that.

I'm on garagejournal.com too,I dig the old garage stuff, vises,anvils,power tools....

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post #13 of 25 (permalink) Old Jan 3rd, 17, 04:23 PM
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Re: Drill Press

Well Done!! Glad to see the old tools restored to working order. These things are great and show what America was all about "in the day". I hate crap from the ChiComs and now we have little or no choice.

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post #14 of 25 (permalink) Old Jan 3rd, 17, 04:43 PM
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Re: Drill Press

Got the same, Montgomery Ward, traded a 90cc dirt bike for it, 40 years ago. Still works.

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post #15 of 25 (permalink) Old Jan 4th, 17, 04:47 AM Thread Starter
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Dave
 
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Re: Drill Press

The new machines definitely don't compare to some of the vintage iron. I was thinking about "restoring" this one, but I like it the way it is.
My tools are a like a lot of my firearms. They have scratches and get a little banged up because they get used, but they're reliable and shoot straight.

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Z23 711 U17 72 B
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