The Shop > Tools

Three versus four.

<< < (2/2)

bertie_bassett:
when I picked up my lathe it came with no chucks, first thing I got was an old 4 jaw.

in all honesty I don't mind not having a 3 jaw, doesn't take very long to set up, and holds things well.

imo knocking the chuck to true things up and then trying to lock it in position without it moving must take longer?

ieezitin:
I own a 3 and 4 jaw both great quality.

The 4 jaw always resides on the spindle, it takes very little to zero a piece / job in it.  If i am going to do repetitive work that requires constant re-chucking without much care to tolerance (with-in .002 or so) the three jaw gets used. Zeroing in on a 4 jaw is a part of working with a lathe experience.

If a requirement calls for a repeat tolerance below the .002 mark obviously collets are used but that requires planning of the part to be manufactured.

Just my humble opinion.

Anthony.

rotorhead:
Hi Lads,

Before converting my oem integrally mounted PrattB L0 3 jaw to a 'Griptru, I used the method of reducing the spigot on the backplate by at least 0.020".

I also used that much on the Griptru conversion, to allow the adjusting screws room to work.

Still use the reduced backplate spigot method on my miller diving head chuck, works very well...

DavidA:
Norman.

One advantage of the adjustable three jaw set up is that, providing you set your dial guage vertically, all you have to do is tap down from the high point whilst rotating the chuck, watching the dial until it settles at zero. No need to loosen/tighten opposing jaws.

Dave.

Navigation

[0] Message Index

[*] Previous page