Shopsmith Forums

Yes t-nuts were made for t-slots(ss again 'does their own[different] thing').

Yes they are the best thing for use with the 510 and 520 fences etc., but are not all that handy for attaching a sacrificial face to the fence.

Those through holes made it a lot simpler!!!;)

Much as I would dislike drilling holes in a 520 fence:eek:, I have to agree with Chuck:)!

Tapped holes in a MVII fence? Curiosity is greatly 'aroused'.

[quote="JPG40504"]Yes t-nuts were made for t-slots(ss again 'does their own[different] thing').

Yes they are the best thing for use with the 510 and 520 fences etc., but are not all that handy for attaching a sacrificial face to the fence.

Those through holes made it a lot simpler!!!]

I don't think the walls of the 520 fence are thick enough to drill and tap. Oh yes, you could drill and tap them but would the threads last.

The fence is and 1 1/2" or more thick and it is hollow. I would not want to torgue down on anything that went all the way through. It would be my luck that I would bend the fence side wall.

Use the t-nuts in a track on top to secure the inverted "L" shaped fence recommended earlier.

As much as I hate to disagree with a fellow who carriers a remote in his pocket capable of arousing the local authorities, I must agree with Dusty on the T-nut use suggestion. I really am afraid drilling holes in the 520 fence will create an undesirable outcome. If not immediately certainly in the future. Jim

fjimp wrote:As much as I hate to disagree with a fellow who carriers a remote in his pocket capable of arousing the local authorities, I must agree with Dusty on the T-nut use suggestion. I really am afraid drilling holes in the 520 fence will create an undesirable outcome. If not immediately certainly in the future. Jim

Hey! I said I 'disliked' drilling holes. Said nothing about tapping!

I do not know the wall thickness of a 520 fence, but, the 500 is 3/16" thick at the hole location(1/8" thick at the bottom) and the 510 is about 1/4" thick. It is indeed hollow between the sides.

The holes are about 1 3/4" above the table so 520 holes would be just below the t slot top as is the 510.

There is no doubt in my mind that through screws will hold the temporary face more tightly against the fence face than brackets from the top of the fence. It the brackets are adequate, then all is well.

A simple carriage bolt and wing nut or knurled nut is far simpler and more gooder IMHO.

Again I would 'dislike' drilling holes in a 520 fence, but then again. . .

FWIW 1/4" holes are excessive. A smaller screw will hold adequately.

JPG40504 wrote:Hey! I said I 'disliked' drilling holes. Said nothing about tapping!

I do not know the wall thickness of a 520 fence, but, the 500 is 3/16" thick at the hole location(1/8" thick at the bottom) and the 510 is about 1/4" thick. It is indeed hollow between the sides.

The holes are about 1 3/4" above the table so 520 holes would be just below the t slot top as is the 510.

There is no doubt in my mind that through screws will hold the temporary face more tightly against the fence face than brackets from the top of the fence. It the brackets are adequate, then all is well.

A simple carriage bolt and wing nut or knurled nut is far simpler and more gooder IMHO.

Again I would 'dislike' drilling holes in a 520 fence, but then again. . .

FWIW 1/4" holes are excessive. A smaller screw will hold adequately.

You can drill holes in your 520 fence but I'll not be doing that to mine.

The walls that we are discussing are 3/16" thick. Probably stout enough to withstand the pressure of thumbscrews without consequence.

dusty wrote:You can drill holes in your 520 fence but I'll not be doing that to mine.

The walls that we are discussing are 3/16" thick. Probably stout enough to withstand the pressure of thumbscrews without consequence.

Since I do not have a 520 fence, it is an academic mind exercise anyway. I probably would drill one if I did not have the other older models to use though. I do not see the holes as being anything other than 'an alteration:eek:'. They would be smaller than 1/4" probably.

JPG40504 wrote:Tapped holes in a MVII fence? Curiosity is greatly 'aroused'.

I just went down and took a picture of the Mark VII fence to show the tapped holes. There are 4 of them along just below the top. They are 5/16"-18. The fence walls at that point appear to be between 3/16" to 1/4" thick. They appear to be drilled through both walls at once and tapped. I can't say without trying it and I don't have bolts and stuff moved in yet but I feel pretty certain that they were through tapped all in one operation and that a bolt started in one side will thread right on through both walls.

[ATTACH]16044[/ATTACH]

I'm pretty sure that you could attach a fence with countersunk bolts going through far enough to add a lock-nut (or self locking nut) gently tightened on the back side.
Bolts like this in the needed length.

[ATTACH]16043[/ATTACH]

.

robinson46176 wrote:I just went down and took a picture of the Mark VII fence to show the tapped holes. There are 4 of them along just below the top. They are 5/16"-18. The fence walls at that point appear to be between 3/16" to 1/4" thick. They appear to be drilled through both walls at once and tapped. I can't say without trying it and I don't have bolts and stuff moved in yet but I feel pretty certain that they were through tapped all in one operation and that a bolt started in one side will thread right on through both walls.

[ATTACH]16044[/ATTACH]

I'm pretty sure that you could attach a fence with countersunk bolts going through far enough to add a lock-nut (or self locking nut) gently tightened on the back side.
Bolts like this in the needed length.

[ATTACH]16043[/ATTACH]

.

What is the hole spacing? 7 1/4, 3 5/8, 3 5/8?

The countersunk bolts used with the table insert will work with Shopsmith's T-nuts in the 520 fence side slot. The "help kit" contains a couple extra of those countersunk bolts.

Gary

greitz wrote:The countersunk bolts used with the table insert will work with Shopsmith's T-nuts in the 520 fence side slot. The "help kit" contains a couple extra of those countersunk bolts.

Gary

So you telling me the 520 side slots are t-slots the same as the two top ones? That changes most of what I have posted re drilling holes in a 520 fence. No need to do that!