OK, so what happened here? - International Association of Penturners
     International Association of Penturners
Pens for Service Members
 
Support The IAP

Go Back   International Association of Penturners > Community Forums > Penturning
  Forgot Password
Register FAQ Members List Search Today's Posts Mark Forums Read
Penturning General penturning discussions not specifically addressed in one of the specialty forums.


Logged on members can hide ads!

Welcome to penturners.org!

You've found the home of The International Association of Penturners. You are currently viewing our site as a guest, which gives you limited access to view discussions, photos, and library articles.

Consider joining our community today. You'll have full access to all of our content, be able to enter our contests, find local chapters near you, and post your questions and share your experience with our members all over the world.

Membership is completely free!!

If you have any problems with the registration process or your account login, please contact us.

Reply
 
LinkBack Thread Tools Display Modes
Old 01-04-2017, 05:34 PM   #1 (permalink)
 
Join Date: Jan 2017
Location: Footville, WI
Posts: 34
Photos: 0

Default OK, so what happened here?

This beautiful burly piece of olive wood had me drooling all through the turning, and looked great throughout sanding, and then when I stop my lathe from buffing it, this was staring at me. What did I do? (Seriously, I'd like to avoid this in the future if possible, it was such a beautiful piece)
Attached Thumbnails
img_20170104_164420.jpg  
RockandCole is offline   Reply With Quote Top
Old 01-04-2017, 05:39 PM   #2 (permalink)
 
RBcarving's Avatar
 
Join Date: Feb 2012
Location: Shell Knob, MO
Posts: 138
Photos: 0

Default

Most common would be a little glue left inside the tube...then when pressed onto the bushing & turned thin, it cracked. An easy "fix" though...you can fill the gap with some CA and then strategically place the pocket clip over the crack during assembly...you will never see it.
RBcarving is offline   Reply With Quote Top
Old 01-04-2017, 05:44 PM   #3 (permalink)
 
Join Date: Aug 2015
Location: Lawton, Ok
Posts: 2,650
Photos: 7

Default

First, take it off the bushings ...

Second, clean the glue out from inside the barrel ...

Apply some thin CA to the crack, work it into the gap and hopefully the crack will disappear.

Third, put the barrel back on the bushings, and then sand/finish again to give the smooth appearance you desire.

If the crack is still visible, hopefully you can hide this under the clip ... but if you've differentiated the upper and lower barrels and this is the lower, you may have to cut/turn off this damaged part and apply an "oops band" or possibly live with the defect. It may also be possible to just fill it in and pray it's hardly noticeable.
__________________
Click Here to go to Pen Turner's Anonymous Meeting

Attendance is not mandatory, unless you're addicted to turning pens.
Skie_M is offline   Reply With Quote Top
Advertisement
Old 01-04-2017, 05:50 PM   #4 (permalink)
 
JimB's Avatar
 
Join Date: Mar 2008
Location: West Henrietta, NY, USA.
Posts: 4,006
Photos: 9

Default

I agree with the above about why it cracked. You can also fill the crack with something and adding thin ca. When I have cracks in bowls I use coffee grounds, rubbing them into the crack, then putting a small amount of thin CA. The dark coffee often just looks like it is part of the wood. People do not even notice it unless I point it out to them.
__________________
Jim
West Henrietta, NY
JimB is offline   Reply With Quote Top
Old 01-04-2017, 06:21 PM   #5 (permalink)
 
duncsuss's Avatar
 
Join Date: Jun 2012
Location: Wilmington, MA
Posts: 1,151
Photos: 1

Default

Quote:
Originally Posted by JimB View Post
You can also fill the crack with something and adding thin ca. When I have cracks in bowls I use coffee grounds, rubbing them into the crack, then putting a small amount of thin CA.
Alternatively, sometimes you get better "camouflage" by putting a drop of thin or medium CA on it and sanding with ~220 grit so the sanding dust gets caught and glued in the crack.

(Keep the sandpaper moving so it doesn't get glued to the barrel.)
__________________
Duncan Suss
website: FruitOfTheLathe | facebook: FruitOfTheLathe

duncsuss is offline   Reply With Quote Top
Old 01-04-2017, 08:52 PM   #6 (permalink)
 
jttheclockman's Avatar
 
Join Date: Feb 2005
Location: NJ, USA.
Photos: 68

Default

You got the answers as to how to fix it. As to the why, my guess is it was not properly trimmed to the tube and then too much pressure was exerted on the bushings. Now add the heat from sanding on a thin piece of wood and all kinds of bad things could happen. Or it was cracked from using a barrel trimmer and when finally turned down the crack appeared. To avoid this you may want to start sanding the ends down instead of a barrel trimmer. I am going out on the limb here because you are a new turner and we do not know if you are aware of these things and exactly what your method of preparing the blank and turning the blank are. So we are at a disadvantage. We can only make suggestions and it is up to you to try to find the problem on your own. Do a few of these and things become clearer as to what to look for.

This same problem can appear when assembling the pen also and if the CA does not hold it will appear. Good luck.
__________________
John T.
jttheclockman is offline   Reply With Quote Top
Old 01-04-2017, 09:07 PM   #7 (permalink)
 
Join Date: Jan 2017
Location: Footville, WI
Posts: 34
Photos: 0

Default

Thanks for the suggestions. I was using a carnauba finish on it (not the most popular from pens from what I gather, probably a new thread as to why? in the future...) I took it off while still warm and let it sit in my workshop (unheated garage in Wisconsin) and as the wax cured and hardened the crack seems to have almost disappeared, I'm going to attempt to rebuff it tomorrow and see if the wax has sealed it. I've been using the barrel trimmer but I don't like it, I didn't realize sanding it was an option, I'm assuming a 6" disc sander would do the trick?
RockandCole is offline   Reply With Quote Top
Old 01-04-2017, 09:12 PM   #8 (permalink)
 
Join Date: Jan 2007
Location: Monroe, Ohio, USA.
Photos: 8

Default

How hot did you get it? Heat could have caused it to crack as well. Less common, but it could be a possibility.
__________________
Justin
jleiwig is offline   Reply With Quote Top
Old 01-04-2017, 09:18 PM   #9 (permalink)
 
Join Date: Jan 2017
Location: Footville, WI
Posts: 34
Photos: 0

Default

Quote:
Originally Posted by jleiwig View Post
How hot did you get it? Heat could have caused it to crack as well. Less common, but it could be a possibility.
I'm not sure, I run the lathe at 2500 or so to apply the wax and then keep it there and pinch with a cotton towel to melt the wax into the wood. I do this 15-20 times in a row to really build up a heavy and hard finish. (Variation of a Technique I carried over from tobacco pipe carving and finishing)
RockandCole is offline   Reply With Quote Top
Old 01-04-2017, 09:27 PM   #10 (permalink)
New Member Advocate
 
Edgar's Avatar
 
Join Date: Feb 2013
Location: Alvin, TX 77511
Posts: 4,910
Photos: 23

Default

A 6" disk sander will work fine, you just need a jig to present the tubed blank perpendicular to the disk. A set of inexpensive transfer punches from Harbor Freight is handy because you want to use a bar, rod or punch that is as close to the I.D. of the tube as possible for a nice, square trim.

Some turn a round wooden disk to mount on the lathe headstock & apply a piece of adhesive sandpaper to it then put a punch in a chuck or holder of some sort in the tail stock.

I use a sanding disk intended for a hand-held drill mounted in a Jacob's chuck in my head stock.

There are a number of ways to approach it and there's been lots of discussion & photos here over the years. I'm just on my iPhone right now or I'd post some links for you, but you should be able to find some of them if you use the Search function.
__________________
Eat pecans - 10,000,000 squirrels can't be wrong.
Edgar is offline   Reply With Quote Top
Related Content
Logged on members can hide ads
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 01:03 AM.

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

Content Copyright © 2003-2016 by Penturners.org, LLC; All Rights Reserved
Terms Of Service   Acceptable Use Policy