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acrylic pen blank

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Forum topic by 3285jeff posted 10-02-2015 02:07 PM 569 views 0 times favorited 5 replies Add to Favorites Watch
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3285jeff

152 posts in 1185 days


10-02-2015 02:07 PM

I drilled out a pen blank and needless to say the drill bit wobbled a little and the 3/8 hole turned out 27/64th,,,,I was actually thinking of pouring the hole with something and drilling it back out,,but I’m sure the resin and what it takes to mix it is very expensive,,,lol,,,anyone got any answers to this question,,,,thank you


5 replies so far

View JADobson's profile

JADobson

682 posts in 1579 days


#1 posted 10-02-2015 02:23 PM

Epoxy might work.

-- James

View jeff's profile

jeff

989 posts in 2932 days


#2 posted 10-05-2015 08:12 AM

How did you go about drilling the blank?.Was the blank square?.Did you use a brad point drill bit?Maybe glue in a wooden dowl and then re-drill.

-- Jeff,Tucson,Az.

View Wildwood's profile

Wildwood

1887 posts in 1602 days


#3 posted 10-05-2015 12:33 PM

Only 0.046875 off; would plug one end of pen tube use liberal coating of epoxy on tube. Insert in the blank and wait 24 hours to fully cure before trying to turn. If glue joint fails using your pen mill or initial turning, just use more epoxy and wait another day.

I use a drill press and machinist vice for drilling my blanks because allows me to clear chips easier & often and do not get out of round hole, or bits running off center. Takes me less than 30 seconds to set up blanks and see if bits running true. I never drill deeper than ¼” before clearing chips.

My drilling procedure might be slower than others using a drill press, but much faster than drilling on a lathe.

Good luck with it!

-- Bill

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TheDane

4997 posts in 3130 days


#4 posted 10-05-2015 01:39 PM

Clearing waste(chips) and keeping the rpm’s down is really critical, especially in acrylic. The epoxy fix Bill detailed above should take care of the problem for you.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View moke's profile

moke

862 posts in 2244 days


#5 posted 10-06-2015 06:34 PM

I usually drill my acrylic out that much over on purpose. With Acrylic blanks it is often is transparent enough to see the tube. ( regardles of color…even dark sometimes) I like to paint my tubes with white spray paint, then paint the inside of the blank white…(use a Q-tip)... I then color the epoxy with a drop of testors model paint…..this will accomplish three things…..if it is all white, it will brighten up your blank, you will not see the tube or glue and in your case you will take up that extra room created in drilling.

One final thing…when you slip the tube in, if it is sloppy the epoxy will fix it, but may settle to the bottom and the blank will be some what out of round…..set the blank on end on top of some wax paper….which will get glued to the blank, be is easily removed. If you use too much epoxy you may get some “overage” inside the tube…..carefully file it with a rat tail file after it dries.
Mike

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