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Re: 520 RAIL THUMBSCREW SIZE?
Posted: Thu Jan 20, 2022 10:14 am
by reible
No (#12) rails.
- question1.jpg (143.7 KiB) Viewed 515 times
Ed
Re: 520 RAIL THUMBSCREW SIZE?
Posted: Thu Jan 20, 2022 11:52 am
by JPG
Thank You (again!!!)
P.S. I see you added screws to the other 2 scale slots.
Re: 520 RAIL THUMBSCREW SIZE?
Posted: Thu Jan 20, 2022 12:01 pm
by chapmanruss
JPG,
I haven't owned a Joint-Matic so you may already know this better than I do and can confirm it but I recall there were changes made to them after Shopsmith took over their production. Depending on the age of Joint-Matics being compared there may be differences. I mention this for those who may be referencing this Thread for information as it relates to their Joint-Matic.
Going back to Ed's comments about the knob he received from Shopsmith being different from the ones he already had. There have been two different knobs used since the introduction of the Pro Fence aka 520. Below are pictures of the two styles.
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- 520-M7 Knobs 1.jpg (129.72 KiB) Viewed 506 times
- 520-M7 knobs 2.jpg (110.86 KiB) Viewed 506 times
Re: 520 RAIL THUMBSCREW SIZE?
Posted: Thu Jan 20, 2022 12:08 pm
by JPG
The major difference between the original and the SS version was the elimination of the TWO lead screws connected by a chain/sprockets to the elevation crank. An alteration that resulted in it's week link. The original was VERY robust.
The SS adjustable miter gauge extrusion was also added(a good move).
Not sure the slide was plastic either.
There are likely other differences.