[eaglezsoar]

I have completed a t-slot extrusion assembly then realized that I needed to add a t-nut to the assembly. I do not intend to disassemble the unit to add
one t-nut and I am asking the more experienced builders on this forum to help
me figure out what I can use to add a t-nut without dis-assembly. I have heard of the roll-in nuts but I'm not sure if they would work for this.

Thanks to anyone who can respond.

[harryn]

Sometimes it is possible to find a non critical location on the rail where you can just drill a hole and drop in a nut.

[jharvey407]

There are a few roll-in style T-nuts available, as well as a couple of T-nuts that twist in.

What type of extrusions are you using?

I have completed a t-slot extrusion assembly then realized that I needed to add a t-nut to the assembly. I do not intend to disassemble the unit to add
one t-nut and I am asking the more experienced builders on this forum to help
me figure out what I can use to add a t-nut without dis-assembly. I have heard of the roll-in nuts but I'm not sure if they would work for this.

Thanks to anyone who can respond.

[eaglezsoar]

The 8020 15 series. I have seen the roll in nuts that have a rubber piece sticking up for a handle but I can't see how they can hold anything. The nut
would have to catch the extrusion with the very edges of the nut. Not sure
how tight you could make that joint without the nut popping out.

[jharvey407]

I built my machine out of the 8020 40 series. I used the exact nuts that you are talking about and can assure you that they provide more than enough holding power. They actually have a large contact area once they are in the slot.

Here is a look at my machine in the prototyping stage.

The 8020 15 series. I have seen the roll in nuts that have a rubber piece sticking up for a handle but I can't see how they can hold anything. The nut
would have to catch the extrusion with the very edges of the nut. Not sure
how tight you could make that joint without the nut popping out.

[LTHOMPS]

Another common name is drop-in t-nuts. I bought them for the exact same reason you quoted and they have sufficient holding ability. The little rubber piece is for you to grab abd hold while you screw in the screw.

[eaglezsoar]

Thanks for the replies.
I have tried the roll in tnut that has the rubber handle and was
actually surprised at how well they work. Expensive but worth it
if it saves you hours of work.

Carl