Thread: Morse Taper Issues

The centre is supposed to come out when you wind the shaft all the way back in. It's probably had the tang cut short though. WD40 and the rebar I suppose, unless you can put a block of wood between it and tailstock body, and wind it back in.

Calling that a live centre is a good way to start an argument. That's a rolling centre, thought is may have rusted up to become a dead centre. If you get it out and put it in the other end (still rusted up) then it's a live centre.

Well that was an easy solution. I'd put wood behind it and clobbered it to no avail, and had an elaborate plan for a frame that would distribute the force of a hammer evenly without generating a moment and wedging it in more, but I hadn't thought to just wind it back with some wood jammed around

It's covered in black gunk and dents and lumps, inside the tailstock and on the "rolling" centre. A bit of cleaning time coming up before anything goes back in there...

Thanks for the help

Brendan

Calling that a live centre is a good way to start an argument. That's a rolling centre, thought is may have rusted up to become a dead centre. If you get it out and put it in the other end (still rusted up) then it's a live centre.

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Originally Posted by

Eh???????????????????????????????????????????????????????

I think he was trying to say that when a live center rusts up, it becomes a dead center (doesn't spin). Then, when you put it in the other end (headstock) it spins, and becomes a live center.

Originally Posted by Dropcat

Calling that a live centre is a good way to start an argument. That's a rolling centre, thought is may have rusted up to become a dead centre. If you get it out and put it in the other end (still rusted up) then it's a live centre.

Never heard it called that in 30 years of woodturning

Tim

Neither have I in the engineering trade or woodturning, however some company has listed them as rolling centres.

Maybe another case of some desk jockey making up a name that sticks.

Originally Posted by sjm

I think he was trying to say that when a live center rusts up, it becomes a dead center (doesn't spin). Then, when you put it in the other end (headstock) it spins, and becomes a live center.

I was referring to the rolling centre bit Sean.

Google search reveals that some Poms call a live center a rolling center.

Hi Randir,
Suggest that you lift the tailstock end - say two bricks high and tip some pentrating oil down the end where the knock out bar enters and leave for a few days. I would also brush some on around where the centre enters the tailstock. Think that will work. Drillit.

As above and wind it our as far as possible and warm it up a bit with a gas torch to improve penetration.

Next step is to dismantle and use a press.

ps: I am down in conder if If you need help.

This is what I'd try.

Reverse the tailstock on the bed.

Push it up against the head stock with a solid lump of wood on the bed as a spacer.

Lock the tailstock down hard.

The largest dia steel rod that will fit in the tailstock.

The biggest hammer in the workshop.

One big hit.

I thought the problem had been solved

Originally Posted by jimbur

I thought the problem had been solved

So did I, but perhaps not everyone read the third post.

i have looked several times at this
is it just me or is the tailstock pointing in the wrong direction

cheers smiife