Shopsmith Forums

In taken inventory of my collection of Shopsmith bits and pieces, I have bunch of arbors and such that I’m not sure what they are. There are also some large spacers, washers, and nuts and bolts.

Here’s a picture…. I thank there are a couple of Shopsmith saw arbors (not 5/8”), and a couple of shaper arbors. What do you think?

You have a 1-1/4" saw blade arbor, a couple of router bit arbors (maybe both 1/2" and 1/4") , several universal arbors along with nuts and spacers that go with them (maybe both 5/8" an 1/2"). There's a couple threaded adapters that look like a piece of a bolt mounted in a router arbor. Not sure if those are all Shopsmith arbors. I'm sure Russ Chapman will provide details on them. That little Y shaped piece of metal isn't ringing a bell for me.

The little y-shaped piece looks like a eye-screw or eye-hook driver for a drill, not a Shopsmith part

Since Ed said I would provide more details here they are. Below is your picture with many of the parts numbered to identify them. Parts not numbered are mostly common hardware like nuts and washers.

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1.a 1/2" Router Chuck
2. looks like a 5/8" Molder/Dado Arbor but missing the black protective coating. It is missing the Spacer, Washers (2), Lock Washer and Nut.
3. a 5/8" Universal Arbor AKA Molder/Dado (P/N 505506) which is missing the Spacer and Washers (2).
4. a 1/4" Router Chuck
5. these are the Machined Spacers for 2 & 3.
6. I believe Gray Owl is correct "looks like a eye-screw or eye-hook driver for a drill, not a Shopsmith part"
7. 1-1/4 Saw Blade Arbor (P/ N 22 032) for the Mark 5/V with the original Table System AKA Mark V 500. That one is from the 1950's to early 1960"s.
8. a 5/8" Arbor (P/N 22 031) and missing the Spacer, Washers (2), Lock Washer and Nut. Also from the 1950's to early 1960"s.
9. Same as 7 but missing the nut.
10. these are the Machined Washers for the Arbors missing them. 2 go with each Arbor.
11. an early 1/2" Router Chuck that someone has put a 1/2" threaded stud into.
12. a non-Shopsmith Arbor

The above descriptions are the best I can tell from the picture. If 2, 3 or 8 have a smaller diameter of 1/2" threaded shaft than 5/8" they would be the 1/2" Universal Arbor part number 505505. Arbors 2 and 8 should have a lock (internal dog eared) washer like 8 does.

The following from my information on Shopsmith Arbors, Spindles and Chucks may be helpful to you in determining what is a Shopsmith arbor or not.

All but one of direct spindle attachment accessories use a single set screw to attach to the reverse tapered spindle. If the accessory has other than a 5/8” smooth bore for a spindle shaft attachment or more than one set screw than it is not an OEM Shopsmith part with 1 exception, the 2-1/2” jointer head (part numbers 129-12X & 12 230) has two 1/8” or 5/32” Allen wrench size set screws. With the introduction of the Mark 5 by Magna Engineering (sold beginning in 1954) all possible set screws were changed to the 5/32” Allen wrench size although some part numbers remained the same even into the 1960’s. Model 10 accessories used 1/8” & 3/16” Allen wrench size set screws. There are a few exceptions, examples - the current 1/4” router chuck (514632) uses 3/32” Allen wrench size set screws to hold the router bit in place and some of the Precision Molders (505553) used 3/16” Allen wrench size set screws for spindle shaft attachment and blade locks. Some parts will have the same number but a different size set screw. As an example, 12 232 the ½” Shaper Adapter had two different size bases and both a 1/8” and 5/32” Allen wrench size set screw depending on when it was made. Another change that started with some of the Mark 5 Arbors was the introduction of the keyed lock washer. Model 10E & 10ER Arbors did not have this feature.

Due note that Router Chucks have 3 set screws but only 1 is used to attach it to the Quill's Spindle. The other 2 hold the Router Bit in place.

Thanks a lot Russ & Ed! Exactly what I needed!

I wonder how I ended up with so many router chucks? They aren’t used frequently.

I need a couple of regular 5/8” saw arbors and a drill chuck…

ShalomOrchard wrote: ↑Wed Apr 23, 2025 5:21 pm I wonder how I ended up with so many router chucks? They aren’t used frequently.

Router chucks are useful for other purposes. I have a couple of 1/2" chucks and 1/4" inserts. I have used them to hold small drum and disk sanders and a rotary rasp. They are made to withstand radial forces better than drill chucks do.

As Ed said Router Chucks can be used for other purposes. The one I labeled 11 has already been used for something else.

As for 5/8" Saw Arbors you have a couple of choices. Below is a picture of the different 5/8" Arbors made over the years. Part of your decision would be based on which Shopsmith and Model you have. Some of your parts date back to the mid 1950's to early 1960's. This would have been for a Mark 5 with the original Table System later named the Mark V 500. If you have a later Mark V model such as the 510/505 or 520 you would need different/longer Saw Blade Arbors like part number 555118 or 555608. Since you have the 1-1/4" Saw Blade Arbor I will assume, at least for this discussion, that you have a Mark 5 or Mark V 500. Now to the choices I mentioned. There is a 5/8 " Saw Blade Arbor to use non-Shopsmith Saw Blades shown below as part number 555321 on the top row. Prior to Shopsmith making a 5/8" specific Saw Blade Arbor the 5/8" Universal Arbor more recently known as the Molder/Dado Arbor was used. That is part number 505506 and all 4 versions are shown on the bottom row. Previously, prior to 1964, the 5/8" Universal Arbor was the one on the top row part number 22 031 and simply called a 5/8" Arbor. These can be and were used for 5/8' bore Saw Blades.

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As you said

I need a couple of regular 5/8” saw arbors and a drill chuck…

Which is understandable since it is handy to have Saw Blades you use often already mounted on arbors.

As for the Drill Chuck you can get a new one from Shopsmith. The current one is the upper right one in the picture which will work on any of the Shopsmith Mark series or the Model 10 tools. If looking to buy a used one be cautious as they can look great on the outside but have problems on the inside. I have ones going back to the first Drill Chuck supplied with the original Shopsmith tool the Model 10E from 1947 which works perfectly and one that has a problem which is not useable. Below is a picture of the different Drill Chucks supplied with the Shopsmith tools over the years. They are not in order, but the lower left is the original one using a Jacobs 33B Drill Chuck on an adapter.

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