Zero Chuck

[Whyemier]

I was working this evening on the reverse gear attachment to the banjo on my lathe. As usual I was thinking of many different unimportant things and remembered something.ondering:

When working at the Jax Shipyard I was told to use a 'Zero chuck' on a particular job. A zero chuck is a Jacobs drill chuck that will close completely, you could chuck up a stick pin or sewing needle with no slippage.

When I moved on to other endeavors I use this term to refer to the Jacobs chuck in the drill press. I was subsequently laughed out of the shop. I have never heard this term again, other than from my own lips.

Is this a term use generally by machinists or was is particular to that shipyard or that group of machinists? Has anyone heard the term before designating a type of Jacobs chuck?

Am I the only one!? :veryscared:

Just wondering.:noidea:

 

[Karl_T]

Re: 0 Chuck

I haven't heard it, but it makes sense. Chucks are described by the range of bits they hold

 

[Micke S]

Re: 0 Chuck

There are so called zero-point-chucks.

 

[ki4byz]

Re: 0 Chuck

I call them 0 chucks, but I normally I say “down to zero chuck” to clarify to others.
I normally classify drill chucks by there max capacity.
Other then using the chuck model no. how does one classify chuck size?
Most other machinist I have known would just say small chuck, but that is just a term.

14n chuck 0-1/2”, I have a ¼” Jacobs ball bearing that only goes down to .040 min. .280 max.

 

[hman]

Re: 0 Chuck

I was subsequently laughed out of the shop.

YOU get the last laugh! Here's mine:

Here's another: http://www.ebay.com/itm/Jacobs-Chuck-No-0-/271690434106?pt=BI_Tool_Work_Holding&hash=item3f4203063a

Jacobs doesn't seem to make this size any more - smallest I could find on their website was size 1. But the 0 chucks do exist!

 

[Whyemier]

Re: 0 Chuck

O gee, I just resubmitted this post cause I thought it hadn't been posted yesterday, Had some trouble.

Just ignore the other one.

Sorry:sorry2:

 

[Whyemier]

Re: 0 Chuck

Thank You Darkzero for deleting the other post. I had all kinds of trouble yesterday posting anything.

 

[darkzero]

Re: 0 Chuck

O gee, I just resubmitted this post cause I thought it hadn't been posted yesterday, Had some trouble.

Just ignore the other one.

Sorry:sorry2:

I moved this one & deleted the new one. Please do not post duplicate threads. We can simply move or edit if there is an issue.

 

[Holescreek]

Closest thing to a "zero chuck" is a 0-0 (.0135~.156"). Makes sense though, I can never find my zero drill bits when I need them.

http://www.jacobschuck.com/keyed-chucks/jacobs-6200-0-0-plain-bearing-medium-duty-1-8-chuck.html