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Where to find adjustable drill bits?

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Forum topic by jasoncarpentry posted 03-12-2015 03:28 PM 1435 views 0 times favorited 14 replies Add to Favorites Watch
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jasoncarpentry

136 posts in 2120 days


03-12-2015 03:28 PM

Topic tags/keywords: drill bits adjustable pilot hole clearance hole

When I started woodworking about 40 years ago, I bought a set of fully adjustable drill bits. I think they were called “Scroo-Drills,” and I think they came from Brookstone. These bits are great! With just a set screw, I can adjust the length of the pilot hole, the clearance hole, and even the countersink (i.e., level w/ the wood surface or inset below the surface).

The set consists of #6, #8, #10, and #12. I don’t remember the cost, but whatever it was, it was worth it. Now, after 40 years, these guys are getting dull and losing their temper (just like me, but that’s another story…). I can’t find any replacement bits as versatile as these. Can anybody give me a lead?

-- Jim in Tennessee


14 replies so far

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JoeinGa

7483 posts in 1473 days


#1 posted 03-12-2015 04:03 PM

Will these styles not do what you want? Available at any of the big box lumber suppliers, and pretty much at any hardware stores too.
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-- Perform A Random Act Of Kindness Today ... Pay It Forward

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jasoncarpentry

136 posts in 2120 days


#2 posted 03-12-2015 06:18 PM

Joe-

I’ve got a set of those, and I must confess that I’ve never used them. I’ve heard that the tapered pilot hole is superior to an ordinary pilot hole. But the ones I’m referring to are more elaborate, w/ separate sections for the pilot (non-tapered) and clearance holes. If I had enough tech savvy, I’d take a picture and post it.

But maybe the availability of yours answers my question: maybe they’re an improvement over my old ones, and that’s why the old ones aren’t sold anymore.

-- Jim in Tennessee

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_Whitey

9 posts in 1017 days


#3 posted 03-12-2015 06:51 PM

I countersink bits similar to the ones that are pictured. For 8.99 plus a 20% off coupon at Harbor freight, you can’t go wrong. They seem to last pretty well, as i have never worn one out or broken one.

Click here for a link

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MarcusM

57 posts in 2446 days


#4 posted 03-13-2015 02:54 PM

Jim, I know exactly what you’re talking about, have a set that are easily 40 plus years old too. If I recall they’re referred to as adjustable countersink +counterbore bits. The set I have were made by Stanley; no idea if they’re still available. As you said, they are/were great bits.

Mark.

-- Tilbilly Mark

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Smitty_Cabinetshop

13738 posts in 2084 days


#5 posted 03-13-2015 04:53 PM

I’d love to see a picture of these bits, having a hard time visualizing (not uncommon).

-- Don't anthropomorphize your handplanes. They hate it when you do that. -- OldTools Archive --

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jusfine

2405 posts in 2392 days


#6 posted 03-13-2015 05:02 PM

Jim,

They are also available through Lee Valley, as a kit w all sizes and individually. Have used them for years, really like them as well.

-- Randy "You are judged as much by the questions you ask as the answers you give..."

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dhazelton

2326 posts in 1763 days


#7 posted 03-13-2015 05:23 PM

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rick1955

258 posts in 897 days


#8 posted 03-13-2015 05:57 PM

The tapers bits were for old style wood screws. The newer wood screws are straight and many have drill tips on them. Unless I’m restoring antiques I toss the old style screws in the trash.
These are what’s used in commercial shops…
http://www.snappytools.com
http://www.deerwood.com/catalog/index.php?cPath=10http://www.deerwood.com/catalog/index.php?cPath=1_6
I keep a set of Makita quad driver bits in the to go drill case…
http://www.makitatools.com/en-us/Modules/Accessories/AccessoryDetails.aspx?ID=34161

-- Working smarter with less tools is a true crafts person...

View Jim Finn's profile

Jim Finn

2416 posts in 2388 days


#9 posted 03-14-2015 11:51 AM

I see at the snappy tool site some two piece drill and flat bottomed counter bores that I like but none with a 3/8” counter bore. I used to have some spade type bits with a flat bottomed counter bore in this smaller size but I do not know where to buy them now, if they are still made. Anyone know where I could get them?

-- "You may have your PHD but I have my GED and my DD 214"

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KDO

145 posts in 2235 days


#10 posted 03-14-2015 12:22 PM

Woodcraft and Rockler have them. And like has been mentioned, unless you are using the old style WOOD screws, make sure you don’t get the Tapered style. They make sets with straight center bits, for the new style screws. They aren’t expensive.

-- Christian, Husband, Grandpa, Salesman, amateur Woodworker.

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Jim Finn

2416 posts in 2388 days


#11 posted 03-14-2015 10:43 PM

KDO I looked on both sites and did not find them. What are they called there?

-- "You may have your PHD but I have my GED and my DD 214"

View rick1955's profile

rick1955

258 posts in 897 days


#12 posted 03-15-2015 01:31 AM

http://www.snappytools.com/products/gold-screw-countersinks/

Countersinks.

http://m.woodcraft.com/aHR0cDovL3d3dy53b29kY3JhZnQuY29tL1Byb2R1Y3QvODMwODQ2L1NuYXBweS01LVBpZWNlLUNvdW50ZXJzaW5raW5nLURyaWxsLVNldC5hc3B4

In over 40 years I don’t think I’ve seen a hardware store or catalog that didn’t stock something similar.

-- Working smarter with less tools is a true crafts person...

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rick1955

258 posts in 897 days


#13 posted 03-15-2015 03:41 AM

Jim Finn. Counterbores are available at Morris wood tool and Fuller.
http://wlfuller.com/html/type__r_.html

-- Working smarter with less tools is a true crafts person...

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Jim Finn

2416 posts in 2388 days


#14 posted 03-15-2015 11:27 PM

Thanks Rick The counterbore is what I am interested in.

-- "You may have your PHD but I have my GED and my DD 214"

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