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FORSTNER DRILL BITS

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Forum topic by dlcarver posted 603 days ago 727 views 0 times favorited 20 replies Add to Favorites Watch
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dlcarver

260 posts in 627 days


603 days ago

Topic tags/keywords: sharpening

Does anyone know if forstner drill bits can be sharpened ? I have never heard of it. It looks like it would be pretty complicated. I sharpen my own drill bits usually….. but this one has me stumpped ???

Also, is there any way to keep them from burning through the wood, in deep holes…. anything over 1/2” or 3/4” deep ?

Dave

-- Dave Leitem,Butler,Pa.,http://dlcarver.etsy.com

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Dick, & Barb Cain

7043 posts in 1197 days


603 days ago

I have touched up, just the cutting edges with a small stone, or file.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

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GaryK

9536 posts in 885 days


603 days ago

It’s possible just more work.

Also there are differences in brands of bits. Some are better than others.

-- Gary, East TX -- The longest journey begins with a single step.

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ND2ELK

6215 posts in 671 days


603 days ago

Hi Dave

We had a place out of St Louis that sharpen the prisons. Perhaps there is a sharpenig place near you. We usually got one sharpening out of a bit. After that it was cheaper to replace them. But those guys were pretty rough on bits

God Bless
tom

-- Mc Bridge Cabinets, Iowa

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Blake

2760 posts in 771 days


603 days ago

The way you keep (any) drill bit from burning is by letting the wood chips escape, which take the heat out of the hole with them.

When drilling deep holes with a forsner bit the chips tend to pile up above the bit (in the hole). Just bring the bit up out of the hole every few seconds to eject the chips (I am assuming you are using a drill press), and then continue cutting.

I don’t know about sharpening them.

-- Check out my new website! http://www.blakeweberwoodworking.com

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Scott Bryan

20735 posts in 719 days


603 days ago

I agree with Gary’s statement about the quality of the bits. I have bought individual bits and they cut fine. But on impulse I bought a set of Tradsman bits at Lowe’s and they don’t cut very well, especially the larger ones.

-- With God's help all things are possible- even woodworking. Woodworking is not just a hobby, it is an (expletive deleted) expensive hobby.

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brunob

1476 posts in 1066 days


603 days ago

I have sharpened one or two of mine with a small file. Seems to work OK.

-- Bruce from Central New York

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Dadoo

1723 posts in 887 days


603 days ago

Blake’s got it there. I have the same burning problem and have found that going slow and ejecting the shavings often, works best. Most of your carvings (some of the best I’ve seen in a long while) are in soft woods like pine right? Soft woods have a lot of pitch and moisture that would slow things down. Look at your blades edge after drilling. If the wood fibers are bent aroung the edge then it’s obviously not cutting. If the edge is clean, then it’s loading up.

As for sharpening, the bits had to be sharpened once before, right? I took a look at my bits and it looks like a jeweler’s file could easily touch them up.

-- Bob Vila would be so proud of you!

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rikkor

11335 posts in 772 days


603 days ago

Never tried it.

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8iowa

592 posts in 658 days


603 days ago

I have not tried it yet, but I understand that they can be sharpened with an auger bit file

-- "Heaven is North of the Bridge"

View dlcarver's profile

dlcarver

260 posts in 627 days


603 days ago

I usually am drilling cherry wood, with the forstner bit, with speed of my drill press about half the speed it can go. I do clear the chips steadily while drilling. The cut is smooth….....it just burns.

THANKS GUYS, I APPRECIATE IT !!!
DAVE

-- Dave Leitem,Butler,Pa.,http://dlcarver.etsy.com

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brianinpa

1365 posts in 620 days


603 days ago

I use a small Jewlers file set to work the edges on mine and it keeps the cutting. Staying ahead of the dullness is the key. Don’t let the bit become too dull before trying to sharpen.

-- Brian, Lebanon PA, If you aren’t having fun doing it, find something else to do.

View dlcarver's profile

dlcarver

260 posts in 627 days


603 days ago

THANKS !

-- Dave Leitem,Butler,Pa.,http://dlcarver.etsy.com

View greenheadsharpening's profile

greenheadsharpening

4 posts in 603 days


603 days ago

They can be sharpened. What usually needs to be sharpened is the circular rim around the bottom. Once that dulls it will not cut into the wood anymore.

-- www.greenheadsharpening.com

View Daren Nelson's profile

Daren Nelson

536 posts in 803 days


603 days ago

I sharpen them all the time. If you have a good eye and a steady hand it is a piece of cake. A little time consuming, but cheaper than new.

-- Urban logger, http://nelsonwoodworks.biz/

View jeffthewoodwacker's profile

jeffthewoodwacker

487 posts in 701 days


603 days ago

It takes some time to sharpen but it is worth while. A small file or a diamond stone work great. One trick is to use a black magic marker on the edge that you want to touch up. good luck!

-- Those that say it can't be done should not interrupt those who are doing it.

View dlcarver's profile

dlcarver

260 posts in 627 days


603 days ago

Thanks Daren! What do you use to sharpen them ? I was thinking of going at it with my foredom flexable shaft and a stone of some sort.

Dave

-- Dave Leitem,Butler,Pa.,http://dlcarver.etsy.com

View Lee A. Jesberger's profile

Lee A. Jesberger

3710 posts in 877 days


603 days ago

Hi David;

They aren’t normally too bad to sharpen. I use a fine stone on the outside edge, and the inside edge, if possible.

Since there are so many different styles , each type will dictate which way to go. Typically they just need to be honed lightly. I have also used emery cloth to hone them on the inside edge.

Hope this helps.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

View Daren Nelson's profile

Daren Nelson

536 posts in 803 days


603 days ago

”Thanks Daren! What do you use to sharpen them ?”
Diamond hand files. I am a professional tool sharpener, so I have “practice” on my side, but a guy can do it with a good understanding of how the bit works (it’s all about angles) and some skill/patients. A novice with a power tool might as well throw them away, saves ruining the bit/wasting abrasives/getting hurt…just my $.02

-- Urban logger, http://nelsonwoodworks.biz/

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TroutGuy

100 posts in 609 days


601 days ago

I agree with Daren. Tool and cutter grinding is an art, so a tip-of-the-hat to your profession.

Those of you who don’t know what a Monoset is (or how to run one), should stick to diamond files and touch ‘em up by hand.

-- There is nothing in the world more dangerous, than a woodworker who knows how to read a micrometer...

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SteveKorz

2030 posts in 611 days


601 days ago

Hey Dave, check out these links…

The site here, and the chart here. The chart link is pretty good…

I’ve “touch up” sharpened mine in the past, and it takes a while. I use a little diamond stone that I use with my router bits. Hope that helps.

-- As iron sharpens iron, so one man sharpens another. (Proverbs 27:17) †

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