To put your shaft thru.
A lathe that measures 6 inches from the center of the spindle to the closest part of the bed is considered a lathe with a 12 inch swing.
The spindle of a lathe is a rotating hollow tube within, and protruding the head stock and to which a chuck, drive plate or facing plate attaches and rotates to enable machining. It is housed within the head stock in bearings and has some gears around it which is driven by other gears which in turn is driven by an electrical motor.
knurling
The two factors that determine the size of a lathe are the "swing" and "distance between centers". The swing of a lathe is the length measured from the center of the hollow spindle or chuck to the nearest part of the bed multiplied by two. Distance between centers is the distance measured between the chuck and tail stock.
Using a drive plate on a lathe requires removing the chuck and the drive plate is attached in its place onto the spindle.
The headstock of a lathe is pushed into a tapered hole in the head spindle. It gets stuck in there in normal use, and you cannot pull it out when you want to change it. So . . . the spindle is hollow all the way through the lathe head. To get the headstock to lossen you insert a round knock-out bar into the front of the spindle until it touches the back of the headstock. A few taps with a mallet will jar the headstock loose. Then you remove the knock-out bar.
The backing plate on a lathe is used to mount the chuck to it and is the adapter to the lathe spindle.
A lathe that measures 6 inches from the center of the spindle to the closest part of the bed is considered a lathe with a 12 inch swing.
The spindle of a lathe is a rotating hollow tube within, and protruding the head stock and to which a chuck, drive plate or facing plate attaches and rotates to enable machining. It is housed within the head stock in bearings and has some gears around it which is driven by other gears which in turn is driven by an electrical motor.
knurling
The two factors that determine the size of a lathe are the "swing" and "distance between centers". The swing of a lathe is the length measured from the center of the hollow spindle or chuck to the nearest part of the bed multiplied by two. Distance between centers is the distance measured between the chuck and tail stock.
No, thank you.
Using a drive plate on a lathe requires removing the chuck and the drive plate is attached in its place onto the spindle.
Obama
The bed ways of a lathe in itself are not hollow, but the area between the ways are. This is primarily to reduce the weight of the machine and also the cost due to much less material used to manufacture it.
Single phase induction motor ( usually capacitor- start type)
There are various ways for a lathe to hold its workpiece.The workpiece could be held between centers from the spindle and tail stockIt could be gripped in a chuckA faceplate could be used and the workpiece is screwed, bolted or clamped to it.