Collet closer

[Toolmaker51]

same with me,if it was worken good why reapir it...so I never got inside of one either.and that was 21 years ago... about all I remember was it was all flopy...looked like it was made out of some bearing races.I dont know if it was bought or made. in my head Im seeing something like a syncroizer for a manual trans for a car.to hole it open or closed..but probably not.as I have so much stuff rolling around in there ( my head)things seem to get morphed before they get out.

Both you and old_toolmaker are close to the function. The gear 'syncronizer' is a cog, the teeth engage a lever to hold rotation of drawtube screwed into collet body, how you set the amount of pull [diameter] and attendant tension. The lever, essentially duplicates the throwout lever and bearing on a conventional manual transmission, with collet sort of acting as GM style diaphragm pressure plate.

marksbug, I emailed you through HMT.net offering a drawing. Goes for you too, old_toolmaker. You might be older than me..."51" hasn't anything to do with my age! Hereabouts most call me TM51...