Newby

[raysputin]

Hi people,

I am a newby here and a newby to precision engineering (just bought my first lathe).

I am having some trouble buying parts for my lathe with regard to the components fitting together.

On the internet there are the measurements/specifications for morse tapers (MT) but I cannot find any measurement/specifications for chuck tapers.

Can someone please put me onto a web site which lists the measurements for JT tapers?

All the best,
Ray

[chameleonrob]

I would suggest you get a copy of Tubal Cains's Model Engineer's Handbook, it has all the data you are likely to need, including info on , jacob's, R8, international, split collers and morse tapers.
rob

[davidimurray]

Hi Ray

Welcome to the group.

How about this website :-
www.newmantools.com/tech/taper.htm

Cheers

Dave

[chameleonrob]

Or www.alanstepney.info/page40.html
rob

[houstonceng]

Or take the simple route. You buy a chuck and spec says it's JT3 - so you buy an arbor that's JT3 to MTx (where MTx is the morse taper of your lathe). Most arbours have the sizes on the tang and "our suppliers" usually know what they're selling.

I've never separated chucks from arbors - except for cleaning and they go back in the same combo. I've got two on MT3 for lather tailstock, one on R8 for vertical mill and one MT2 for pillar drill. Three key type Jacobs and one Chrono's keyless.

Anyway, the JTs are dificult to measure accurately and arbors are so cheap it's not worth making them.

Andy

[raysputin]

I just love it when people know what they are talking about - my compliments.

My interest comes because a supplier (who shall remain nameless) supplied me with arbors of the wrong taper. I thought that I would get the facts so that I don't get dudded again.

Thanx again.