monophoto
Member
A question for the experts out there in turning land. The Penn State catalog describes their 1/2" drill chuck using these words:
"#1 Morse taper for Carba-tec or similar Mini-Lathes, mounts to headstocks or tailstocks. A 1/2"" grip can be used for grabbing small turnings or pen mandrels on the headstock or a drill bit in the tailstock. Accepts a 1/4-20 draw bolt."
In fact, the shaft on the chuck is tapered on both ends - an MT1 for the lathe, and a shorter taper that fits into the chuck itself. The MT1 end of the shaft is drilled about 1" deep and has a 1/4"x20 thread to accept a draw rod. But when used on the headstock to hold small turnings as described in the catalog, what holds the chuck onto the second taper?
My experience is that if the process of turning puts any axial force on the shaft away from the headstock, the chuck will eventually pop off that second taper. That would seem to me to be unsafe.
Is this a matter of false advertising, or did they send me the wrong chuck?
"#1 Morse taper for Carba-tec or similar Mini-Lathes, mounts to headstocks or tailstocks. A 1/2"" grip can be used for grabbing small turnings or pen mandrels on the headstock or a drill bit in the tailstock. Accepts a 1/4-20 draw bolt."
In fact, the shaft on the chuck is tapered on both ends - an MT1 for the lathe, and a shorter taper that fits into the chuck itself. The MT1 end of the shaft is drilled about 1" deep and has a 1/4"x20 thread to accept a draw rod. But when used on the headstock to hold small turnings as described in the catalog, what holds the chuck onto the second taper?
My experience is that if the process of turning puts any axial force on the shaft away from the headstock, the chuck will eventually pop off that second taper. That would seem to me to be unsafe.
Is this a matter of false advertising, or did they send me the wrong chuck?
