Hi all
A happy new year...and then my question! I'm trying to make some bushings for a pen kit. They need a 6.3mm hole (no problem) then a 10mm length with a diameter of 7mm then another 10mm length with a diameter of 9.5mm. I've been trying to make them on my metal lathe (I'm more of a machining novice than I am a woodworker!) but without much success. So as a novice I thought I'd share my approach as it's bound to be wrong and hopefully someone can point me in the right direction.
I'm using a length of round brass stock which is 12mm in diameter. It's being held in a three jaw chuck. I have left about 60mm of the bar protruding from the chuck. I've then used the tailstock with a drill chuck to drill the 6.3mm hole. I've then used a tool in the toolpost to bring the bar to concentricity and reduce it to 9.5mm - except it's 9.5mm at the end nearest the tailstock but 10mm at the headstock end. What am I doing wrong? Or is the lathe not set up correctly??
Any help gratefully received - don't mind waiting until next year... :lol:
A happy new year...and then my question! I'm trying to make some bushings for a pen kit. They need a 6.3mm hole (no problem) then a 10mm length with a diameter of 7mm then another 10mm length with a diameter of 9.5mm. I've been trying to make them on my metal lathe (I'm more of a machining novice than I am a woodworker!) but without much success. So as a novice I thought I'd share my approach as it's bound to be wrong and hopefully someone can point me in the right direction.
I'm using a length of round brass stock which is 12mm in diameter. It's being held in a three jaw chuck. I have left about 60mm of the bar protruding from the chuck. I've then used the tailstock with a drill chuck to drill the 6.3mm hole. I've then used a tool in the toolpost to bring the bar to concentricity and reduce it to 9.5mm - except it's 9.5mm at the end nearest the tailstock but 10mm at the headstock end. What am I doing wrong? Or is the lathe not set up correctly??
Any help gratefully received - don't mind waiting until next year... :lol: