Boxford CUD spindle taper

[Sean64]

This seem to be a strange setup . I shone a light up the spindle ,I placed a a small steel machinists ruler along the taper ,I was surprised that it only had two points of contact along the length of the taper . I could see quite a bit light between the two contact points . I have also read that the taper is a none industry standard size taper on the Boxford is this correct ? . It looks to be MT3 size . Just another quirk this lathe has been built with along with the imperial thread nose on the spindle 1 1/2 8tpi . Anyone shed some light on this for me ?

Sean

 

[Pete.]

Morse tapers with a relieved centre are quite common. Nothing to worry about. MT3 and 1.5"-8tpi are standard fitment on those I'm pretty sure.

 

[RichardM]

"It looks to be MT3 size . Just another quirk this lathe has been built with along with the imperial thread nose on the spindle 1 1/2 8tpi"

That's std for 3656 series,

4.5MT for x10 series.

 

[Sean64]

Morse tapers with a relieved centre are quite common. Nothing to worry about. MT3 and 1.5"-8tpi are standard fitment on those I'm pretty sure.

I haven't actually measured it yet but I will tomorrow . Thanks Pete

Sean