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Each style pen kit has a specific bushing set you need to buy. The bushings will be made to go over the 7mm mandrel and be sized to fit the tube that comes with the kit.
Bob
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Yeah what the other two have said. Look at the directions for each pen it will tell you what bushings you will need/ Hope that helps. Good luck if you have other questions feel free to ask.
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Location: IA
It seems you got faster reply's here then the search.
I really hope to see some of your pens.
When I started turning that is all I did and I still love to make them if I am not teaching others to turn them.
What I like about making them is that there is untold ways to make them and I really do not thing the limit has been reached yet.
Good luck
Arlin
As of this time I am not teaching vets to turn. Also please do not send any items to me without prior notification. Thank You Everyone.
It is always the right time, to do the right thing.
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Location: Orlando, Florida
There are different types of pen mandrels. Type A, which is 7 mm and Types B and C. Most pen kits use the Type A mandrel. As stated, each pen kit uses a specific bushing set which slides on the pen mandrel. The bushings are sized to fit inside the pen barrel, with a larger diameter on the same bushing which sets the outer diameter of the pen segment you're turning. Most sellers of pen kits have websites where you can download instructions that show you how to mount the bushings and tell you which segment of the pen each bushing is used for. For a lot of kits, there may be 4 different sized bushings, depending on the diameter of the hardware that's press fit into the pen barrel.
Still Learning,
Allan Hill