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Good deal a very old Unisaw?

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Forum topic by bigblockyeti posted 04-30-2017 12:37 AM 802 views 0 times favorited 12 replies Add to Favorites Watch
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bigblockyeti

4693 posts in 1554 days


04-30-2017 12:37 AM

Topic tags/keywords: question tablesaw

This might be a little steep or a great deal depending on the exact age? I’ve sent the seller a message about the serial number and the motor model. The two things that intrigue me the most are the four foot plinth and the goose egg motor cover. I don’t know if the fence is a jet-lock or a micro set (or which would be more desirable for that vintage of saw). Also peculiar is the motor pulley diameter, it looks small enough that it would have to be a high speed motor to get the proper blade speed vs. the low speed motors with larger diameter pulleys that I am accustomed to seeing on the very early Unisaws. Any insight would be much appreciated.
https://cleveland.craigslist.org/tls/6110361671.html


12 replies so far

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MrUnix

5978 posts in 2033 days


#1 posted 04-30-2017 12:49 AM

Wow… that Unisaw was made sometime in the first year or two of production. The original machines had the 4 cast iron feet in 1939, and they were later replaced with the more common full cast iron plinth in 1940. Also notice the original non-vented dust door. The four footers are a rare breed, and someone will wind up with a way cool machine.. Please let us know if you find out the serial number. The earliest known is serial #A100, owned by the guy who runs the OWWM site. There is even a registry for those machines, and there aren’t many.

Cheers,
Brad

PS: If the motor is original, it will be either a 1/2, 3/4 or 1hp single phase repulsion/induction motor which runs at 1750 rpm and has a 5.5” pulley (three phase would be 3/4, 1 or 1.5hp). Arbor pulley will be 3-3/32”.

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

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bigblockyeti

4693 posts in 1554 days


#2 posted 04-30-2017 01:09 AM

Brad, I was hoping you’d chime in. I didn’t know about the non-vented front cover but much of the other stuff I had a pretty good idea about. The fence is still a mystery to me, if I remember correctly, the jet-lock came first and the micro set was an evolution of that design? What if any are the downfalls of one vs. the other? I still have my solid plinth 1940 Uni (or maybe 1939, never did enough research to confirm) but this would be way cooler to restore to better than new condition!

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MrUnix

5978 posts in 2033 days


#3 posted 04-30-2017 01:18 AM

Other way around… the micro-set was the first, and then later replaced with the jet-lock. The major difference is how the rear lock gets engaged. On the micro-set, you need to turn the rear lock adjuster each time you move the fence. On the Jet-lock, it is engaged automatically via the main cam lock.

And if your other machine has the solid plinth, then it isn’t a 1939 model :)

Cheers,
Brad

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

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bigblockyeti

4693 posts in 1554 days


#4 posted 04-30-2017 02:51 AM

Thanks for straightening me out on the fences. I thought the switch from four footer to solid plinth was in 39’ but couldn’t remember for sure.

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Roger

20874 posts in 2638 days


#5 posted 04-30-2017 08:06 PM

That could surely be a super nice restore project for someone.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. Kentuk55@yahoo.com

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MrUnix

5978 posts in 2033 days


#6 posted 04-30-2017 09:06 PM

Just to preserve the picture, since it will go away once the CL ad gets pulled – here is the saw in question so everybody knows what is being discussed:

Cheers,
Brad

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

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Holbs

1721 posts in 1863 days


#7 posted 04-30-2017 09:17 PM

I secretly think Brad has 17 or 18 Unisaws strewn out around his shop.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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toolie

2094 posts in 2462 days


#8 posted 04-30-2017 11:09 PM

$500 is a lot to pay for a small tabled, right tilt saw with a reportedly unreliable fence system for use in a hobbyist shop. if you plan to use it commercially, it might make sense. i had one. refurbed it and sold it and don’t miss it.

although, i have to say, the 4 feet looks way cool!

-- there's a solution to every problem.......you just have to be willing to find it.

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bigblockyeti

4693 posts in 1554 days


#9 posted 05-01-2017 01:06 AM

I agree, $500 certainly isn’t cheap, but it’s far more about the fact this is a 1939 four footer with the goose egg motor cover than putting together a daily user. I already have a table saw or two, this is all about the fun of restoring something that’s extremely rare

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bigblockyeti

4693 posts in 1554 days


#10 posted 05-01-2017 04:14 PM

Still waiting on the seller to get back to me with the serial number and a couple more pictures. Got some pictures of my old Unisaw and it certainly looks like the motor pulley is smaller binging into question the originality of the motor in the saw for sale,
For sale:

Mine:

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MrUnix

5978 posts in 2033 days


#11 posted 05-01-2017 07:18 PM

The bullet motors offered in 1939/40 were all 1725 rpm and used the larger 5 inch pulley. However, they did offer some in later years running at 3450 rpm. It may be that a PO swapped it out at some point. If so, at least it was with another bullet motor and not a more modern TEFC one that would have required a cabinet modification to work. Or, it’s entirely possible that they just replaced the pulley with the incorrect size. The original pulleys were made out of pot metal that would wear down over time. In later years, they started making them out of machined steel. The Allen-Bradley starter also appears to be a PO modification, as I’m pretty sure they all just came with one of those light switch looking things.

Cheers,
Brad

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

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bigblockyeti

4693 posts in 1554 days


#12 posted 05-04-2017 04:44 PM

Well the seller flaked on me, got back to me on 4/30 said they’d be able to check on Monday (5/1) and never did. The ad was pulled on Tuesday or Wednesday with zero correspondence. Gotta love folks that can’t keep very simple promises CL seems to draw them like flies to dung!

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