Author Topic: Counter sink bit  (Read 1304 times)

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Offline mike9

  • Posts: 77
Counter sink bit
« on: December 07, 2019, 04:19 PM »
Looking for recommendations on counter sink bits. I like the combo drill bit and counter sink . I currently own the three pack dewalt set. I like them but the smallest one is sometimes to large.

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Offline FestitaMakool

  • Posts: 491
Re: Counter sink bit
« Reply #2 on: December 07, 2019, 08:13 PM »
I have an old DeWalt set, with 3 different sizes, with both countersink and drill bit, as the Snappy @thorp mentions. These have been in regular use for more than 15 years, and still is.
I have also earlier tried the equivalent to HSC 82, but have not found any, until I bought a Centrotec bit set, it has two sizes. These are the best stand alone countersink bits. I have tried cheap countersinks, but they make uneven holes.

Also in the Festool Centrotec bit set is the combination of drill bit, countersink and depth stop. These are magnificent, if you can afford them they can also be purchased separately, and is highly recommended. For countersink alone, I would suggest similar to the HSC 82.
“The Stig” Yes, it is true, at least some part of it..
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Offline thudchkr

  • Posts: 165
Re: Counter sink bit
« Reply #3 on: December 07, 2019, 10:03 PM »
Clint

TSC 55, TS 75, HKC 55, DF 500, DF 700, Kapex 120, UG Ext. Wings, MFK 700, OF 1010, OF 1400, OF 2200, CT 22, CT 26, ETS 150/3, ETS EQ 150/5, PRO 5, DTS 400, RO 90, RO 150, RAS 115, CXS, DWC 18-4500, MFT Kapex, MFT 3 (2), MFT 800, MFT 1080

Offline ForumMFG

  • Posts: 937
    • Forum MFG
Re: Counter sink bit
« Reply #4 on: December 07, 2019, 11:39 PM »
The lee valley is the way to go, nothing produced a cleaner cut then a single flute counterbore

Offline demographic

  • Posts: 592
Re: Counter sink bit
« Reply #5 on: December 08, 2019, 04:28 AM »
I use the Hall type which are advertised as deburring cutters.
Expensive but cut a smooth hole and last well.

Plus my local fastener stockist sells them.

Offline Jiggy Joiner

  • Posts: 1094
Re: Counter sink bit
« Reply #6 on: December 08, 2019, 05:49 AM »
I use the Hall type which are advertised as deburring cutters.
Expensive but cut a smooth hole and last well.

Plus my local fastener stockist sells them.

Same here, I got put onto these a good few years ago when buying countersinks. I’ve used them ever since, even on aluminium and plastics. As you say, expensive but, they last well.
The design seem to cut much better than conventional countersinks. My supplier sells them as a ‘deburrer’  [thumbs up]

Offline hdv

  • Posts: 143
Re: Counter sink bit
« Reply #7 on: December 08, 2019, 08:15 AM »
+1 on the Weldon-style countersinks (or zero-fluted as the Americans seem to call them). I have been using the Bohrcraft ones for years in all sorts of materials with very good results.

A benefit that has not been mentioned here (yet) is that they don't "chatter", which is something the 4-fluted countersinks often tend to do if they are not sharp, or if the feed is too quick, or if they are not properly pressed against the material. Chattering will cause the hole to not be perfectly round.

Online Cheese

  • Posts: 7393
Re: Counter sink bit
« Reply #8 on: December 08, 2019, 09:58 AM »
I'm also a fan of the Weldon style, zero flute countersinks. Here's a photo of the Festool version versus the KEO version. The nice thing about KEO is that they're made from cobalt so they hold up well when used on aluminum. The Festool version will only last for about a dozen holes in aluminum.




For drilling a thru hole and a countersink at the same time, I prefer the Amana version over the Festool version. The depth of the countersink is not adjustable on the Festool item. It is on the Amana so you can also sink the screw deeper in wood for plugging. For that reason they're popular with wooden boat builders.




Here's a #10, #8 & #6 Amana countersink that will be converted to the Centrotec function probably later on today. These things are also 1/2 the price of the Festool version.


Offline veric13

  • Posts: 22
Re: Counter sink bit
« Reply #9 on: December 08, 2019, 10:08 AM »
Cheese,

How do you convert it to centrotec?

Online Cheese

  • Posts: 7393
Re: Counter sink bit
« Reply #10 on: December 08, 2019, 10:35 AM »
Cheese,
How do you convert it to centrotec?

I do it on a lathe with carbide tooling. That wiil give you very nice results. However others have done it on a drill press with a file.

https://www.festoolownersgroup.com/festool-jigs-tool-enhancements/centrotec-ing-standard-bits/msg518762/#msg518762

Offline Rob Z

  • Posts: 993
Re: Counter sink bit
« Reply #11 on: December 08, 2019, 03:18 PM »
Cheese, thanks for the reference to KEO Tooling.  I didn't know about that brand and that's just what I need.

Offline TinyShop

  • Posts: 445
Re: Counter sink bit
« Reply #12 on: December 08, 2019, 04:02 PM »
I'll plug the excellent combination (which I own and love) of Snappy's US-made Centrotec-compatible HSS "Gold Screw" countersinks and their optional U.S.-made ball bearing depth stop:




For anyone concerned (and wanting to support the BDS movement), the Amana offerings are produced in Israel (as are, it should be noted, Snappy's carbide-version'ed (but not HSS0-version'ed) Gold Screw countersinks).   
ETS 150/5 EQ (DE) [po], TS 75 EQ (DE) [po], OF 1400 EQ-F (DE) [n], CXS (DE) [n], CMS-GE [DE] [po], CMS TS 75 (DE) [n], LA-CS 50/CMS (DE) [po], VB-CMS (DE) [n], MFT/3 (CZ) [n], DF 700 EQ w/Seneca Small Mortise Kit (DE) [po], FEIN Multimaster 350 QSL (DE) [n], Bosch 1274DVS w/dust collection, sanding frame,  stand & fence (CH) [n], BOSCH 1590EVS w/dust collection (CH) [n], CS Unitec CS 1445 HEPA extractor <re-branded Starmix ISP 1435 H> (DE) [n], CT SYS (DE) [po], Milwaukee 0302-20 (US) [n], Two (2) Porter Cable 862 (TW) [n], Porter Cable 447 (US) [n], Zyliss Vise (CH) [nos], Hitachi C 8FB (JP) [h], Walko 4 MKII (NL) [nos], Festool MFS 400 w/add-on 700 profiles & router slide (DE) [n]

[po] pre-owned   [n] new   [nos] new old stock   [h] heirloom   (XX) country of origin

Offline greg mann

  • Posts: 1888
Re: Counter sink bit
« Reply #13 on: December 08, 2019, 07:55 PM »
@cheeze,

The Festool combination counter sinks are very much adjustable. There are two set screws, the one on the shank will move the countersink in and out while the one just above the flutes and accessible through the hole in the collar sets the drill length.
Greg Mann
Oakland, Michigan

Offline thudchkr

  • Posts: 165
Re: Counter sink bit
« Reply #14 on: December 08, 2019, 09:24 PM »

Here's a #10, #8 & #6 Amana countersink that will be converted to the Centrotec function probably later on today. These things are also 1/2 the price of the Festool version.


Amana now provides those same countersinks with a Centrotec compatible shaft.  Look for the part # that starts with 5533...  I see that the part number on yours starts with a 5524.
« Last Edit: December 08, 2019, 09:28 PM by thudchkr »
Clint

TSC 55, TS 75, HKC 55, DF 500, DF 700, Kapex 120, UG Ext. Wings, MFK 700, OF 1010, OF 1400, OF 2200, CT 22, CT 26, ETS 150/3, ETS EQ 150/5, PRO 5, DTS 400, RO 90, RO 150, RAS 115, CXS, DWC 18-4500, MFT Kapex, MFT 3 (2), MFT 800, MFT 1080