Cheap Reversible Threading Attachment?

[Boyan Silyavski]

The red vertex is for drill presses and is pretty long, I have varying degree of success in using it on my knee mill. You will need to drop the speed to around 100rpm and use machine taps with a spiral flute. To get it to reveres you really need to yank the quill back.

The soba looks interesting in that it has a double speed reverse.

So they are long. I have not considered this. Unfortunately the mill is MT1 shank and all of these are at least MT2, so either i use adapter/ even longer/ or i take out the shank and figure to make MT1 for it

Hi mr.

You clearly have to design and make a flexible paralell-arm that you can attach to your cordless drill. ;)


On a serious note, I have used one in work a few times, none exactly one of the ones you listed, but it was not quite smooth in use. I am sure you have considered using a thread mill?

I have not considered the tread mill till now. I am contemplating laser cutting the pieces and then just finishing them off on the mill, so not sure how that hole edge hardening will do with the thread mill. Thing is its not important the hole place, just its exact squareness to plate.


Now i see in the description these heads adjust to hole misplacement? What that is? So they will not thread true square? Explanation what i am doing: i have the threaded hole and there M10 shoulder screw goes. So 2 bearings and aluminum wheel go on that shoulder screw. If not perpendicular to plate belt goes left or right, so not good