I am a total newbie both to pen turnung and to the lathe in general and I'm >having a problem. Drilling the blank went just fine. Gluing in the
barrels and trimming the blanks went just fine. The problem came in when I >mounted the trimmed blanks on the mandrel and tried to turn them. As soon
as I bring the tip of the chisel into contact with the blank, the blank
stops turning. The mandrel continues to turn, but the blank just stops.
I've got the knurled knob on the mandrel tightened down very tight, and
I'm turning at 800 RPM. Can anyone give me any idea of what might be
wrong?
Thanks...
On Wed, 06 Oct 2021 09:33:23 -0500, Alan Holbrook <no.thanks@lets.not>
wrote:
Assuming you have bushings mounted also?
Just checking, as it's hard to mount the blank without bushings...
Other than that, I'd suggest a higher speed, maybe 1,200 or more if
that's comfortable...
Use very little chisel pressure, especially when the blank is still
square...
Two "musts" in turning anything are LIGHT CUTS and SHARP TOOLS...
Mac Davis <Mac@bajawoodcraft.com> wrote in >news:atkrlg9f8ssccsk0qe7cuo60fc5p0p3j2v@4ax.com:
On Wed, 06 Oct 2021 09:33:23 -0500, Alan Holbrook <no.thanks@lets.not>
wrote:
Assuming you have bushings mounted also?
Just checking, as it's hard to mount the blank without bushings...
Other than that, I'd suggest a higher speed, maybe 1,200 or more if
that's comfortable...
Use very little chisel pressure, especially when the blank is still
square...
Two "musts" in turning anything are LIGHT CUTS and SHARP TOOLS...
Thanks to both of you who replied. I did a little digging and trial and >error (lots of errors!)and figured out most of what I was doing wrong. The >most relevant thing was turning speed. A reference I read on a web site
said to start at a slow speed when roughing the blanks, thus 800 RPM.
Another site said "as fast as possible", so I went up to about 3400 RPM. >Worked wonders. That, and removing a couple of bushings so that there was >only one at either end and one in between the blank halves, seems to have >done the trick.
I am a total newbie both to pen turnung and to the lathe in general and I'm having a problem. Drilling the blank went just fine. Gluing in theIs it possible that the glue on the brass has failed and the blank easily stops when the tool is applied?
barrels and trimming the blanks went just fine. The problem came in when I mounted the trimmed blanks on the mandrel and tried to turn them. As soon
as I bring the tip of the chisel into contact with the blank, the blank
stops turning. The mandrel continues to turn, but the blank just stops.
I've got the knurled knob on the mandrel tightened down very tight, and
I'm turning at 800 RPM. Can anyone give me any idea of what might be
wrong?
Thanks...
On Wednesday, October 6, 2021 at 10:33:28 AM UTC-4, Alan Holbrook
wrote:
Is it possible that the glue on the brass has failed and the blank
easily stops when the tool is applied?
Dave Leader <dave....@gmail.com> wrote in news:77bb3cb2-aa41-458c...@googlegroups.com:I learned a trick? from another pen turner online. Since you have the bushings out ready to use anyway.... why not put the brass tubes on the lathe and rough them up with sand paper whilst spinning slow speed. After 10 years of pen making this old dog
On Wednesday, October 6, 2021 at 10:33:28 AM UTC-4, Alan Holbrook
wrote:
Is it possible that the glue on the brass has failed and the blank
easily stops when the tool is applied?
David,
Thanks for the reply, even if it's a little late :-). That was indeed the problem, as I eventually found out. I'm now being a lot more careful to rough up the blank than I was and and to use a sufficient amount of glue.
I also found out that Gorilla brand CA doesn't appear to hold as well as other brands.
Alan
I learned a trick? from another pen turner online. Since you have the bushings out ready to use anyway.... why not put the brass tubes on
the lathe and rough them up with sand paper whilst spinning slow
speed. After 10 years of pen making this old dog learned a new trick.
Easy peasy and works well every time. Also, a lot of pen makers
prefer glues to CA.
Dave
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