I have had delivered from Tormach a replacement collet for my 770. This part is made by Lyndex in the USA.
I have been lapse in the maintenance of the original but on removing it all seems good, but thought I would replace any way.

As you can see from the photo the two differ dimensionally and design. (Lyndex shown on the left in photo)

I don't know if having a smaller dia and shorter taper is better, but alarm bells rang for me that the shaft dia on the replacement collet is about 1 1/2 thou smaller than my original part. Surely that can't be right.

Tormach original R8 collet

Over all length 4.045"
Length of taper 0.916"
Dia of taper 1.24"
Dia of shaft 0.94945"

Tormach branded Lyndex replacement R8 collet

Over all length 3.902"
Length of taper 0.702"
Dia of taper 1.204"
Dia of shaft 0.948"


I would appreciate your moments before contacting Tormach