chuck jaw plates (Cole jaws) warning - Woodworking Talk - Woodworkers Forum
Thread Tools Display Modes
post #1 of 5 Old 07-19-2011, 09:25 AM Thread Starter
Senior Member
duncsuss's Avatar
Join Date: Aug 2009
Location: Boston, MA
Posts: 2,609
View duncsuss's Photo Album My Photos
chuck jaw plates (Cole jaws) warning

Seems like I learn something every time I turn wood. Over the weekend I made a simple cylindrical plinth to stand a trophy on, couple of beads at the top, and a bead and half-cove at the base.

I started with a tenon at the base, finished the top, then reversed the piece holding it in the 8" jumbo plates (Cole Jaws) so I could finish turn and sand the bottom.

It was running true, so I increased the speed to maximum, hoping this would give a nice smooth finish if I took really light cuts. After removing the tenon and making a couple of smoothing passes, I switched off the lathe to check how it was looking ...

WHAT I LEARNED: my lathe's motor and drive shaft stop turning pretty fast -- faster than the inertia of the chuck and jaw plates liked. The whole thing unscrewed from the drive shaft, fortunately friction slowed it down and it dropped gently onto the lathe bed.

At least it didn't fly across the room, and I was able to fix the workpiece by trimming it down to just a couple of beads at that end.

From here on, when I want to stop the lathe I'll drop the speed to its slowest setting before hitting the power switch.

Please visit my website, Fruit of the Lathe
duncsuss is offline  
Sponsored Links
post #2 of 5 Old 07-19-2011, 09:47 AM
Senior Member
firehawkmph's Avatar
Join Date: Apr 2008
Location: Near Cleveland, Ohio
Posts: 4,982
View firehawkmph's Photo Album My Photos
My cole jaws for my vicmark chuck say 'maximum rpm 800' right on them. Not supposed to spin them that fast. I use them only to finish the bottoms of bowls. Normally just trimming the tenon off and some light sanding. Also take light cuts when using the cole jaws. They aren't meant for heavy cuts.
Mike Hawkins
firehawkmph is online now  
post #3 of 5 Old 07-19-2011, 10:25 AM
Senior Member
Join Date: Sep 2007
Location: Baxter, Tennessee
Posts: 3,257
View john lucas's Photo Album My Photos
Even spinning fairly slow the big jaws have a lot of momentum. I install the chuck and the put my wrench it and give it an extra push. that locks the chuck on and I haven't had the problem of it coming loose again. I had it happen with a 19" bowl.
I would also not recommend running the jaws at full speed. If something happens it happens faster than you can move. A lady was just killed on a lathe a month ago when a piece blew up. I would imagine a cole jaw would do as much or more damage than a piece of wood. You can get the same quality of cut at a slow speed by simply not pushing the tool as fast. Let the tool do the work.
john lucas is offline  
Sponsored Links
post #4 of 5 Old 07-19-2011, 10:59 AM
Senior Member
slicksqueegie's Avatar
Join Date: Feb 2011
Location: Warren, MI
Posts: 572
View slicksqueegie's Photo Album My Photos
This has happened to me a couple times, but It happens only because I try to stop the piece from spinning to quickly at the hand-wheel, and only when it is a larger diameter piece.

Anybody can become a woodworker, but only a Craftsmen can hide his mistakes!
slicksqueegie is offline  
post #5 of 5 Old 07-19-2011, 11:03 AM
H. A. S.'s Avatar
Join Date: Sep 2010
Location: IN
Posts: 1,460
View H. A. S.'s Photo Album My Photos
In the old days, some guys would lose workpieces weighing hundreds of pounds, by the chuck unscrewing from the spindle. Most of those lathes were made good, but the chucks left a lot to be desired. Use of common sense was necessary.

Harrison, at your service!
H. A. S. 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
Adjustable Cole Chuck Big Mack Woodturning 4 07-19-2011 06:25 AM
Cole Jaw size Glidden Woodturning 4 04-06-2011 10:01 AM
Any other jaws to fit a Oneway Talon chuck? sprior Woodturning 0 11-11-2010 12:07 AM
Cole jaw adaptions Gary Beasley Woodturning 17 04-11-2009 11:52 AM

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