Gallery, Projects and General > How to's

Cenerting the Four Jaw

<< < (4/6) > >>

Baldrocker:
On the subject of 4j self centreing chucks am I right in assuming that you
lose the idependence feature, or am I missing something ?  :scratch:
BR

Baldrocker:

--- Quote ---I need to spend more time reading than pratting about in the garage and getting it wrong..
--- End quote ---
Is there a name for that disease, is there a cure, did I catch it off of you?  :wack:
BR

bogstandard:
BR,

You are correct, a 4 jaw self centring is just like your standard 3 jaw, but, they just so happen to have 4.

Actually, I have found that my 4 jaw SC's are in fact a little more accurate than my normal 3 jaw SC's, and I tend to favour them for normal run of the mill use.

Like everything else, they do have specialist uses, like holding square bar.


Bogs

djh82uk:
I have an 80mm 3 jaw SC and a 100mm 4 Jaw Independant.

Takes too long to keep changing so I have stuck with the 4 jaw, I just centre it by eye, then get the dial indicator on, I just turn it and memorise the highest and lowest number, figure out a rough middle point, turn the chuck so that the indicator reads the highest.

Now you should have a chuck key hole that is parallel to the indicator arm (once the key is in there), slacken the opposite one and tighten the parallel one until you reach the rough middle point on the dial, takes a few goes but takes me less than 2 minutes to get it down to half an increment (0.005mm)

Sounds like along way to do it, but very quick after a few goes, I only do it this way as it's self taught (had no idea how to do it any other way)

DJH

NickG:
I hardly ever use my 4 jaw. Infact, I haven't used it yet on my new lathe. it is massive, I'll be able to do loco cylinders in it no problem!

Since I bought and fitted my £45 chinese 3 jaw from axminster, the run out was only about 0.001" which would take me a while to centre that well in the 4 jaw. More than good enough for anything I've come across so far. if not, I would probably try the ER collets.

Nick

Navigation

[0] Message Index

[#] Next page

[*] Previous page