Ooohhh... conflicting advice
I see youtubers grabbing the spindle to loosen the chuck - so that's not the way to go?
I've just come in from the garage after an unsuccessful attempt to get the chuck off by whacking it
Maybe you are meaning the L series chuck which has a nut to pull the chuck onto the spindle (and push off) ? If so then I think this is different as that seems to be on the back of the spindle and I would say it is for bearing preload.It's similar to what I have on my Colchester Student except my C spanner is about 500mm long.
Yeah good point - that spanner is the right one to remove the collar in question however that is probably not the way to remove the actual chuck! (I don't know the lathe you have Scott so it may be different to mine?)I would say that is preloading the bearings in the headstock so not to be touched.
Normal way to get a screw on chuck removed is put the chuck key in the chuck and give the key a sharp whack. Other options include something similar by chucking up a large Allen Ket and whacking it.
Yeah good point - that spanner is the right one to remove the collar in question however that is probably not the way to remove the actual chuck! (I don't know the lathe you have Scott so it may be different to mine?)
Mine just unscrews with a bit of a tap on a big Allen key gripped in the chuck. (Tap backwards!)
Don't think my lathe has a reverse I've had the chuck off before so don't think there's any kind of lockIf your lathe has a reverse gear there is normally a system to stop the chuck unscrewing in reverse. On the Colchester the nose has a key, the chuck backplate is threaded and a captive threaded collar which sits on the nose then screws onto the chuck backplate, its an L00 from memory.
Yeah that's the way I remove mine - but really I would take advice from someone who knows your lathe as it may be different method to mine (denford viceroy).
The Students were L0, the Chippie may have been the smaller L00its an L00 from memory.