Sierra blank trimming

[Fibonacci]

I have been making a couple sierras, but having a terrible time getting the ends square. My sander is a bit wobbly, so building a squaring jig for it is problematic. I have been using a standard trimmer from WnW, and it works great for the tubes it came with inserts for, but I don't have an insert for sierras.

Does anyone sell a trimmer shaft or an adapter for them?

My other thought was to make one with a drill bit the correct diameter, but that has a higher risk of failure.

 

[Fibonacci]

My search fu is weak today.

CSUSA has a pilot shaft and PSI has an adapter sleeve.

 

[louie]

Jason,

I will send you a couple of delrin blanks that I've already pre-drilled to fit on the standard "A" pen mandrel. You just need to turn one down to fit inside the sierra tube. Save the other for another size. If I would have known you needed them, I would have sent them with your package.

Lou

 

[tool-man]

sleeve

Try Arizona Silhouette, http://fj.pm.sl.pt

Or make your own. It is just a piece of delrin, with a hole down the center that matches your pilot shaft, and turned to fit inside the Sierra tube.

 

[DozerMite]

Get with Johnnycnc. He has just what you need. I make all of my own now that I have a metal lathe to do it.

 

[KenV]

Take a look at this article by Don Ward

http://www.redriverpens.com/pdf files/makingbushings.pdf


Just make the bushing all the same diameter -- that of the inside of the sierra tube.

Or did you know that a cigar tube fits well inside a sierra tube -- if you have a cigar sized insert in a cigar tube you are set for a sierra

(that is one of the tricks for the long one piece cigar pens).


Or -- I make them from scraps with a standard slimeline tube glued in -- then turn to fit inside the sierra (need at least three points of contact inside the tube) with a skew.

They all fit the standard "D" mandrel based guide if the slimline tube is used.

 

[Andrew_K99]

You could make your own. Use a spare 7mm tube and put a piece of acrylic on it and turn it down to what ever diameter you need. I've done this a few times now.

AK

 

[JohnU]

I use a cigar pen tube inside the Derris tube and use a trier that fits the cigar tube. I don't remember what size it is.

 

[JimB]

I use the cigar tube as well. Works great.

 

[its_virgil]

Make your own from a piece of scrap wood. Glue in a 7mm tube (or not) and turn it to the size needed to slip inside the sierra tube.
Do a good turn daily!
Don

 

[Wood Butcher]

I posted a method I use to square up the blank and tube on Feb. 1 titled, Improvised Barrel Trimmer...Free. When I us this I use my old Crapsman belt/disc sander to get it prettty close then use the IBT (catchy ain't it) and everything lines up well. If I could figure out how to insert the link to that post here I would.
WB

 

[76winger]

I posted a method I use to square up the blank and tube on Feb. 1 titled, Improvised Barrel Trimmer...Free. When I us this I use my old Crapsman belt/disc sander to get it prettty close then use the IBT (catchy ain't it) and everything lines up well. If I could figure out how to insert the link to that post here I would.
WB

Here's the link:
http://www.penturners.org/forum/showthread.php?t=75057&highlight=Improvised+Barrel+Trimmer

 

[Fibonacci]

I posted a method I use to square up the blank and tube on Feb. 1 titled, Improvised Barrel Trimmer...Free. When I us this I use my old Crapsman belt/disc sander to get it prettty close then use the IBT (catchy ain't it) and everything lines up well. If I could figure out how to insert the link to that post here I would.
WB

I had read that, but my trimmer is not flat on the back. It has a couple of stair steps.

I have been thinking about mounting a thin plate there to be able to stick sandpaper to.

Thanks for all the ideas. I will have to remember them the next time I need another size. Unfortunately for my budget, I ordered one when I found them, before waiting for replies.