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messed up on a patriot pen

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Forum topic by 3285jeff posted 10-15-2015 11:49 PM 501 views 0 times favorited 4 replies Add to Favorites Watch
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3285jeff

152 posts in 1182 days


10-15-2015 11:49 PM

well I finished one of these pens and it looked great,,,so someone else wanted one and I started making it and I didn’t have any trouble with the blue stars,,,,but when I started on the stripes,,it busted right down to the tube, twice it happened,,i was using ca when I glued the brass tube in and turning it at a little over 1200 rpm,,,,kinda depressing when both blanks did it,,can anyone give me some advice in correcting this problem,,thank you


4 replies so far

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SignWave

320 posts in 2500 days


#1 posted 10-16-2015 12:39 AM

What kind of tool were you using? The reason I ask is that I saw someone blow a segmented pen blank apart recently while using one of those carbide cutters. It seems to me that since those cutters don’t offer edge support the way a gouge or even a skew chisel would (depending on how you use them, of course), they’re more likely to cause problems with small segmented parts. Speculation on my part, perhaps.

-- Barry, http://BarrysWorkshop.com/

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3285jeff

152 posts in 1182 days


#2 posted 10-16-2015 01:11 AM

I was using the small easy wood tool

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SignWave

320 posts in 2500 days


#3 posted 10-16-2015 01:17 PM

I hope that someone with more turning experience chimes in.

Personally, I’d try using a different tool that offers better bevel support, such as a skew chisel or a bowl gouge. If that isn’t an option yet, then you may have to focus on cutting angle (higher vs. lower), lighter cuts, and spindle speed.

I also wonder if the unsupported edge could combine with wobble in the mandrel to produce a small catch. A supported bevel will help, but perhaps a Mandrel Saver like the one PSI sells would help.

Again, I’m not claiming great insight, just offering suggestions to try. I have nothing against EWT tools, although I do think they’re better suited for some applications than for others.

I’m not sure if this helps, but here’s a video of a segmented pen blank exploding while being turned with EWT it’s subtle, but you can see a bit of wobble in the mandrel.
https://www.youtube.com/watch?v=bNz8Rz-rysw

-- Barry, http://BarrysWorkshop.com/

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Bill7255

354 posts in 1749 days


#4 posted 10-16-2015 01:58 PM

Jeff, I have never turned that pen or used the easy wood tool for pen turning. I quit using ca to glue the blanks and now use epoxy. I have much better luck with that. As far a chisels the shopsmith pen chisels http://www.shopsmith.com/ownersite/catalog/l_penturningtoolset.htm are my favorite. I highly recommend them.

-- Bill R

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