Chuck Question? - Woodworking Talk - Woodworkers Forum
Thread Tools Display Modes
post #1 of 5 Old 12-06-2011, 09:13 PM Thread Starter
Senior Member
Jesus Saves!'s Avatar
Join Date: Oct 2011
Posts: 172
View Jesus Saves!'s Photo Album My Photos
Chuck Question?

Just bought a Super Nova 2 chuck. It came with the 50 mm jaws. What is the best size for bowl turning. It seems to hold around 2 to 3 inch bowls pretty good. But, anything larger and they sling off. Maybe I'm not doing something right. I have been mostly using the recess up into the bowl. I used a talon one time and it flew off. It could have been the wood (walnut). New to this with alot to learn. Thanks for any help you can give.

But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us. Romans 5:8
Jesus Saves! is offline  
Sponsored Links
post #2 of 5 Old 12-06-2011, 09:25 PM
Yea i got wood
robert421960's Avatar
Join Date: Dec 2010
Location: Rockholds Ky
Posts: 3,016
View robert421960's Photo Album My Photos
show pics of your chuck and bowls you are mounting
pics speak a 1000 words
robert421960 is offline  
post #3 of 5 Old 12-06-2011, 09:36 PM
Senior Member
sawdustfactory's Avatar
Join Date: Jan 2011
Location: North Bend, WA
Posts: 4,801
View sawdustfactory's Photo Album My Photos
Are your jaws straight or dovetailed? Need to cut your tenon accordingly. Also, your tenon should ideally be sized so that the jaws grip it at their roundest position...not all the way closed or not opened too far. Make sure your tenon is not bottoming out in the chuck. The face of the chuck jaws should have a nice flat spot on the bottom of the bowl to register against. When tightening the chuck, don't over tighten it. Tighten it snug one handed and then give one good two handed tighten and you should be good. Sharp tools and light cuts...don't force it. Ok, to steal another members tagline...that's all the free advice I can afford to give you.

Oh, and did I mention, take a class or find an experienced turner to help you...learn to do it right before you develop too many bad habits or before that chunk of wood decides to slap you upside the head.

That bowl was perfect right up until that last cut...
sawdustfactory is offline  
Sponsored Links
post #4 of 5 Old 12-06-2011, 09:46 PM
Senior Member
Join Date: Aug 2010
Location: North Carolina
Posts: 1,021
View NCPaladin's Photo Album My Photos
I agree with Robert that a picture of the problem would help.
How large (diameter) and thick (deep) are you trying to turn? Are your recesses 2-3 inches in diameter?
I cut mine where the closed jaws just fit in the opening as show in the picture. When expanded they will be at optimum holding area.
Other problems may be that the item it too thick, like 6” or more. The standard 2” jaws are not made for that much leverage.
Are your recesses too deep? The top of jaws should fit tight against the wood and the wood should not contact the base.
Did you make (or have) a tool to cut the dovetail to the correct angle? I use a old bench chisel but a large flat screwdriver will work also.
I assume the bowl came off, and not that the recess broke. You should have at least ½” of sound wood surrounding the recess and 1” is much better.
How deep sorta depends on the wood, for green wood I go about 3/8” deep.
Attached Thumbnails
Click image for larger version

Name:	Expansion Recess.jpg
Views:	73
Size:	23.9 KB
ID:	33036  

They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin

Last edited by NCPaladin; 12-06-2011 at 09:55 PM.
NCPaladin is offline  
post #5 of 5 Old 12-06-2011, 10:07 PM
Senior Member
Join Date: Sep 2007
Location: Baxter, Tennessee
Posts: 3,257
View john lucas's Photo Album My Photos
You should turn a tenon for the bowl that is shorter than the jaws are tall. This lets the wood sit on top of the jaws as well as in the jaws. It keeps the wood from rocking.
When you put a chuck on the wood the jaws compress the wood. When you turn wood it vibrates and can compress the wood more so it rocks. It will eventually work it's way out.
If you put the shoulder on the wood it helps prevent this. Another tip is to stop the lathe every now and then and tighten the chuck.
john lucas is offline  

Quick Reply

Register Now

In order to be able to post messages on the Woodworking Talk - Woodworkers Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Chuck Question? Jesus Saves! Woodturning 13 12-10-2011 09:54 AM
Jet model 6 drill press chuck question Jelly Power Tools & Machinery 0 08-28-2011 12:35 PM
what kind of chuck would i use to turn wood if i would use a chuck to turn wood? intolight Woodturning 7 12-01-2010 02:18 AM
chuck question Joeslake Woodturning 2 01-28-2010 05:53 PM
Chuck question sander Woodturning 3 12-14-2008 05:51 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

For the best viewing experience please update your browser to Google Chrome