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RPM for big Forstner

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Forum topic by RodNGun posted 635 days ago 688 views 0 times favorited 8 replies Add to Favorites Watch
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RodNGun

118 posts in 937 days


635 days ago

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


8 replies so far

View oldnovice's profile

oldnovice

3715 posts in 2001 days


#1 posted 635 days ago

View Monte Pittman's profile

Monte Pittman

13827 posts in 972 days


#2 posted 635 days ago

Ssssslllllllllooooooowwwwwwww :-)

Interpreted as “Slow”

-- Mother Nature created it, I just assemble it. - It's not ability that we often lack, but the patience to use our ability

View BobLang's profile

BobLang

98 posts in 2034 days


#3 posted 634 days ago

About half the slowest speed on your drill press.

Unsolicited advice-clamp the wood down before boring.

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

View lumberjoe's profile

lumberjoe

2833 posts in 882 days


#4 posted 634 days ago

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

View tyskkvinna's profile

tyskkvinna

1308 posts in 1620 days


#5 posted 634 days ago

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 1586 days


#6 posted 634 days ago

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

-- Mike

View 8iowa's profile

8iowa

1489 posts in 2395 days


#7 posted 634 days ago

250 rpm on a press with a lot of torque.

-- "Heaven is North of the Bridge"

View MonteCristo's profile

MonteCristo

2095 posts in 822 days


#8 posted 633 days ago

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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