[quote="JPG40504"]My 'thinking' was that tapping through both 1/8" bars would yield 1/4" of threads(5 full threads rather than 2 1/2).
Not sure what the threads are in the oem version, but AIUI there are two closer to the ends with smaller threads and they could all three be included.
You have more faith in the epoxy than I!]
More threads should be better, however not knowing the amount of tension I will be applying has me believing that a manufactured nut should be sufficient. If strength of the nut or the bolt becomes a consideration I could use grade 8.
The OEM tapped threads at the two ends are 1/4 - 20 while the center is 3/8 - 16.
I'll do some testing to check out the epoxy before I try any jigs that might cause major injury if they would fail. A mechanic friend has a 6 ton press that can be configured to pull as well as press. He also has a meter that is used to determine breaking strength.
I too am certain regarding the epoxy. Quick tests will help determine it's suitability. I have a MIG welder that if needed I can use to tack weld the nuts to the bar. If I add another bar to fill up the depth and width of the miter slot, I will probably just weld it, but still just have nuts tack welded at the ends. Can you tell that I really don't like drilling and tapping?
I do like the OEM units. I had a conversation with Doug Reid regarding how much I like the SS pieces. They are a nice addition and well designed, but at their cost plus shipping, I'd rather spend my SS money on other items that are unique to SS, not something readily made that have the same function
For me, the reality is that I can fabricate forty plus for the same cost as four from SS, as well as tailor them to my specific need(s) If I had a perceived need for only 4, I would just buy them. However, I've found that as lazy as I am, I like the idea of having enough that I do not have to find them and switch them for each fence extension and jig.
This spring as the weather warms, I'll make a few and report. I still have to create the Sketchup drawing for the horizontal micro adjuster with better pictures (both simple versions and since Forrest likes it so much maybe I should patent the idea!
) and build my wood working bench. I'm also taking Dusty's suggestion to heart and will add a T-track to the right side of the main table. It may be superfluous, but I like the idea of something level with the table which will allow me to clamp and such without attaching it to the fence.
A final comment (for this moment) on "building extras" for the Shopsmith. Though I had not consciously realized it until a few days ago, one of my favorite perceived benefits of the Shopsmith is how it can be modified, upgraded and tinkered with "
by the user". It is not the be all and end all of wood working toys, but it IS a good solid platform which can be left alone or enhanced, as envisioned by it's user. Very Cool!