SPT’s What When and Where

[chapmanruss]

Ed,

You are correct that those two holes, which have been cast in the Main Frame since the beginning, are for the bracket for the Belt Cover you show. There is a different Belt Cover Magna made that also uses those two holes and the same bracket part that attaches to the Main Frame. It covers less of the Belt and can be seen in the picture below on a Power Stand. It can attach directly to the Mounting Base which is another mounting option for the Belt Cover for different SPT's. So, if you were wondering what the center threaded screw hole in Mounting Bases was for, that's it.

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SPT Power Stand 1.jpg (154.6 KiB) Viewed 157745 times

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In the above case it happens to be attached in the wrong position for use.

More recently, two additional holes have been added to the Bandsaw Main Frame. They are drilled and threaded holes for the Hub Safety Cover as shown below.

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Hub Safety Cover.JPG (140.95 KiB) Viewed 157745 times

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Hub Covers can now be found on the Mark Headstock too.

[jpdalton]

They are on all the gray bandsaws I have. No idea if they were there in the earlier Magna and Yuba versions. You can probably check on those.

They’re there on my ‘56 bandsaw as well…

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…but this concept even predates the bandsaw, as this instruction sheet from 1955 shows.

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[edma194]

…but this concept even predates the bandsaw, as this instruction sheet from 1955 shows.

Different guard but same two bracket parts in use since 1955.

[chapmanruss]

The Instruction Sheet John shows in his post is for the same Belt Guard I showed in the picture in my previous post. It shows how to install it on the Jig Saw. The Jig Saw was introduced about or at the same time as the Mark 5 in March of 1954. The bracket was made to match the holes that the Name Plate/Cover attach to the Jig Saw through. Clever way of doing it, isn't it. The Belt Guard Ed first posted about is a later Belt Guard providing more coverage and protection. Having these Belt Guards able to attach directly to the SPT's would allow the owner to make their own stand with motor to use the SPT without having to buy an OEM Mounting Base for their stand.

[chapmanruss]

Let's cover one more change to the Magna/Shopsmith Jointers made over the years. The question of having a "special" Washer on the Cap Screws for the Cutter Head Wedges came up. The OP was concerned that they were missing on their Jointer. So, with some research here is what I found. According to the Manual for the Magna 4" Jointer Model 4E from 1953 made to mount on a special Headrest for the Model 10E and 10ER they did not have the washer under the screw. According to the Manual for the Model 620 that replaced the 4E adding the Mounting Posts for the Mark 5 they did use the "special" washers. In 1990 when the Cutter Head changed the washers were again no longer used. They are not shown in the parts diagram for the current Jointer.

To have or not have the "special" Washer, does it really matter? Over the years the engineers at Magna/Shopsmith have changed their minds on that question.

What is so special about the Washer? It is a flat washer that has an outside diameter slightly smaller than the head of the Cap Screw. It is thinner than a common flat washer.

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Wedge Screw and Washer.jpg (160.95 KiB) Viewed 152818 times

[jpdalton]

Yuba Greenie Jointer S/N

It can sometimes be helpful to know who made the Shopsmith/Magna Tools over the years.

Yuba Power Products Inc. 1958 or 1959 - 1961

Russ - picked up an old Yuba Greenie jointer today, and I was unfamiliar with the serial number format. Do you have any background on the evolution of this serial number?
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[chapmanruss]

I have seen the "M" prefix on Jointer serial numbers. I don't know the reason it was added with the "0" before the rest of the serial number. The lowest I have seen is on a later Model 620 Greenie just prior to them becoming the 620-C. It is serial number M066874 made in May 58 by Magna Power Tool Corporation. These serial numbers with the M & extra 0 continued into the Magna American era and the highest serial number I have seen with it is another 620-C M078187 Goldie. I have owned and restored one of these Jointers with the M prefix. A Goldie 620-C M074192 made in June 60 by Yuba shown below.

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[jpdalton]

There have been a number of changes in Jointer Parts over the years.

Russ - I was going through some old pics I have of Magna machines and found this one that compares castings of a 1955 (SN 30152, background) vs. 1957 (SN 64016, foreground) model. Guess there was a bit of trial and error needed to trim these down while still maintaining rigidity!
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[chapmanruss]

Yes, the Infeed Table and Base/Outfeed Table castings have changed over the years. Below is another example of those changes in later Jointers. In these cases, it is the casting of the Infeed Tables that were changed. Number 3 looks longer but is not. It is lifted off the surface by the Fence and Cutter Guard still being in place.

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Jointers bottom view.jpg (286.2 KiB) Viewed 114344 times

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In the group above 1 is the oldest (pre-1984), followed by 4 (between 84 and 90). 2 and 3 are of similar vintage made after November 1990.

Here is a look underneath a 1998 Jointer.

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In looking through my Jointer pictures I found I have very few of the bottom side.

[jpdalton]

Was there ever an Item No. 65 000??

Was flipping through some vintage manuals today from the Magna Engineering/Power Tool era, and was noting the sequence of the SPTs:

• 61 000 - Jigsaw

• 62 000 - Jointer

• 63 000 - Bandsaw

• 64 000 - Belt Sander

Then suddenly, Magna jumped to:

• 66 000 - Sprayer

Was there ever something that was conceived or existed with an item number of 65 000?