John did you take Debating in School? You have the qualities of a good debater.
You wrote commenting on my previous post about the 1/2" threaded hole being there from the begining
Which is all why I questioned the order of release. Here is a list of what I think is questionable.
- All carriages have 1/2" holes. As you say it is the right size for the crank but I think it is way over kill for the other table raiser. So why was such a large bolt used for the non crank table raiser if it came first? If it didn't come first it was there so they used it.
- The table raiser brochure mentions eliminating tedious cranking. Why would you mention that unless you were talking about your own product. It does not make sense to me that they would be talking about some unknown machine by some unknown manufacturer.
- Why mention in the brochure that the table raiser mounts to the 1/2" drilled and tapped hole that all Shopsmith carriages have if that hole was put there in the first place to attach that table raiser.
But there is a fly in the ointment. Your point about the part number is a very valid one. It could be that the table raiser was an early design improvement that got assigned a part number and never got produced until later and the part number was never changed.
We will probably never know.
I'm going to throw another "Monkey Wrench" into the mix. Attached is the Instructions for the "Crank and Arm" Table Raiser in the PDF below.
This is the instructions and not an ad but some terminology is the same between the two types of Table Raising Assemblies even though they are being described for different purposes. One is to sell it the other is how to use it. They both use the term "Micro Adjustment" in what the two assemblies will do for you. Unfortunately neither the ad or the instructions have a date on them. The only thing we have to go by is they are both shown on a 10E with the early Table Trunnion.
My thought on your item #2 - Both types eliminate tedious cranking since they were designed to have the table adjusted to the approximate height then the rod of the one or the arm of the other is set and the the "Micro Adjustment" is made by turning the screw knob or the crank.
My thought on your itemMain Woodworking Forum - Is it possible that both systems were in planning when the first 10E's were being made requiring something on the carriage for them?
My thought on your item #3 - Mentioning in the ad that the table raiser mounts to the 1/2" drilled and tapped hole that all Shopsmith carriages have is a selling point that no modifications are needed to use this accessory.
Finally I can't believe that the rod and screw system came out near the end of the 10ER being made and they left the old number on it. Since the numbers changed about two years before Model 10ER production ended.
Also, I just noticed, it is listed (no picture) as an accessory in the parts lists of the early 10E Manuals as 123-1X. So I checked and the Arm & Crank are listed in the 1951 Manual as 103-38 Table Riser Arm, 103-46RX Table Riser Knob and Stud and 103-40X or 103-39X Table Riser Screw and Handle.
John I think you have said it best... We will probably never know.
Table Raising Assembly.PDF