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RPM for big Forstner

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Forum topic by RodNGun posted 12-03-2012 03:51 AM 702 views 0 times favorited 8 replies Add to Favorites Watch
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RodNGun

118 posts in 957 days


12-03-2012 03:51 AM

What is the right RPM for a 3.5” Forstner bit?


8 replies so far

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oldnovice

3761 posts in 2021 days


#1 posted 12-03-2012 07:13 AM

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Monte Pittman

14175 posts in 991 days


#2 posted 12-03-2012 07:54 AM

Ssssslllllllllooooooowwwwwwww :-)

Interpreted as “Slow”

-- Mother Nature created it, I just assemble it.

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BobLang

99 posts in 2054 days


#3 posted 12-03-2012 11:02 AM

About half the slowest speed on your drill press.

Unsolicited advice-clamp the wood down before boring.

-- Bob Lang, http://readwatchdo.com/

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lumberjoe

2833 posts in 902 days


#4 posted 12-03-2012 01:58 PM

oldnovice, thanks for that PDF! I’m going to laminate it and hang it from the back of my drill press.

-- www.etsy.com/shop/KandJWoodCrafts

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tyskkvinna

1308 posts in 1639 days


#5 posted 12-03-2012 02:13 PM

As slow as you can go and clamp that sucker down… and then find some music you really, really like because you’re going to be grooving to it for a while.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

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paratrooper34

760 posts in 1605 days


#6 posted 12-03-2012 02:23 PM

Amen…..the slowest setting you have on your drill with a solid clamping system.

-- Mike

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8iowa

1489 posts in 2415 days


#7 posted 12-03-2012 02:46 PM

250 rpm on a press with a lot of torque.

-- "Heaven is North of the Bridge"

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MonteCristo

2097 posts in 842 days


#8 posted 12-04-2012 08:07 PM

As others are saying, slow, but also watch how fast you feed the bit. A bit that size can pull your chuck right off its shaft – I have seen it happen.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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