Square hole

[Misterfxt]

Mount a one cornered lathe tool to the lathe cross slide. Mount the part either in the lathe chuck or to the ways at the right height. Now go from right to left taking tiny bite as you use the cross slide as a manual shaper. Yes it takes awhile. And yes it works well. If you need a better explanation than I can type on this little tablet, shoot me a PM at MISTERFXT at sbc glo bal net
All lowercase no spaces and a period before the net an replace the word at with the correct character.


Jerome

[Toolmaker51]

Broach what toyvolvo refers to is called a rotary or rattle broach; heres google. Watts or Slater tools probably best known. Very sturdy, commonly used in large ram-type and standard turret lathes
https://www.google.com/search?q=rota...utf-8&oe=utf-8
They aren't slotters although could form an opening to that a bore would connect afterward, with a little skillful planning.
What happens; as part rotates and causes a cutter with 1 less edge than desired to bite corners into prebored hole, guided by a hardened template.
I guess, with the tool fed mechanically at a comparable rate, a milling machine would do the same.

[Misterfxt]

Chipmaker, how did your square hole turn out ?