drilling acrylic pen blanks

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Forum topic by merle posted 06-29-2010 04:26 PM 2714 views 0 times favorited 2 replies Add to Favorites Watch
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99 posts in 3299 days

06-29-2010 04:26 PM

Topic tags/keywords: pen blanks

i am new to pen truning need to know how to drill acrylic blanks, i used a new bit on slowest speed and still burn an melt..HELP

-- merle

2 replies so far

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612 posts in 4318 days

#1 posted 06-29-2010 06:16 PM

You need to grind the rake angle on the drill bit to a zero degree rake angle. The bit needs to scrap the material away, not slice it.

Go to varisairforce and scroll down and you can see a bit that has been ground. It also has a 60 degree point angle. That helps as well but takes some skill to grind by hand.

Go to sdplastics and you can see a drawing of how to grind the rake angle.

I taught Plastics Technology for 34 years so I did this a lot. Got paid good money to teach companies how to do this as well..

-- Bill - Mesquite, TX --- "Everything with a power cord eventually winds up in the trash.” John Sarge , timber framer and blacksmith instructor at Tillers International school

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99 posts in 3299 days

#2 posted 06-29-2010 11:13 PM

thanks for the info. it worked great.

-- merle

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