3N1™ Drill Point Countersinks

Maximize Productivity with Combination Tools

3N1 countersinks combine drilling, countersinking, and chamfering into a single operation, reducing cycle time and tool changes.

The 3N1 design features a precision drill point that creates the pilot hole while the countersink body follows to create the chamfer - all in one pass. This eliminates the need for separate drilling and countersinking operations.

Drill

Creates pilot hole

Countersink

Forms chamfer

Chamfer

Deburrs edges

3N1 Drill Point Countersinks - Three Operations in One

Benefits

Reduced cycle time
Fewer tool changes
Consistent results
Lower tooling cost
Quick-change options

3N1 HSS Drill Point Countersinks

Combination drill-countersink in premium M2 HSS. Available in all 6 standard included angles.

Body Dia.	Shank Dia.	OAL	Shank Length	Tool Name	60° EDP	82° EDP	90° EDP	100° EDP	110° EDP	120° EDP
1/8"	1/8"	1-5/8"	1-5/8"	3N1-1/8	01473	01488	01503	01518	01533	01548
3/16"	3/16"	1-1/2"	1-1/2"	3N1-3/16	01474	01489	01504	01519	01534	01549
1/4"	3/16"	1-1/2"	3/4"	3N1-1/4	01470	01485	01500	01515	01530	01545
1/4"	1/4"	2"	1-3/4"	3N1-1/4-1/4	01464	01465	01466	01467	01468	01469
5/16"	1/4"	1-3/4"	7/8"	3N1-5/16	01475	01490	01505	01520	01535	01550
3/8"	1/4"	1-3/4"	7/8"	3N1-3/8	01471	01486	01501	01516	01531	01546
1/2"	3/8"	2-1/8"	1-1/8"	3N1-1/2	01472	01487	01502	01517	01532	01547
5/8"	3/8"	2-3/8"	1-1/8"	3N1-5/8	01476	01491	01506	01521	01536	01551
3/4"	1/2"	2-11/16"	1-5/16"	3N1-3/4	01477	01492	01507	01522	01537	01552
7/8"	1/2"	2-13/16"	1-5/16"	3N1-7/8	01478	01493	01508	01523	01538	01553
1"	1/2"	2-13/16"	1-5/16"	3N1-1	01479	01494	01509	01524	01539	01554

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3N1 Carbide Drill Point Countersinks

Solid carbide construction for maximum tool life. Available in all 6 standard included angles.

Body Dia.	Shank Dia.	OAL	Shank Length	Tool Name	60° EDP	82° EDP	90° EDP	100° EDP	110° EDP	120° EDP
1/8"	1/8"	1-1/2"	1-1/2"	3N1-1/8-W	01903	01923	01943	01963	01983	02003
3/16"	3/16"	1-1/2"	1-1/2"	3N1-3/16-W	01904	01924	01944	01964	01984	02004
1/4"	3/16"	1-1/2"	1-3/16"	3N1-1/4-W	01905	01925	01945	01965	01985	02005
1/4"	1/4"	2"	2"	3N1-1/4-W-1/4	01906	01926	01946	01966	01986	02006
5/16"	1/4"	2-1/4"	1-3/4"	3N1-5/16-W	01907	01927	01947	01967	01987	02007
3/8"	1/4"	2-1/4"	1-3/4"	3N1-3/8-W	01908	01928	01948	01968	01988	02008
1/2"	3/8"	2-1/2"	2"	3N1-1/2-W	01909	01929	01949	01969	01989	02009
5/8"	3/8"	2-5/8"	2"	3N1-5/8-W	01910	01930	01950	01970	01990	02010
3/4"	1/2"	2-3/4"	2"	3N1-3/4-W	01911	01931	01951	01971	01991	02011
7/8"	1/2"	2-7/8"	2"	3N1-7/8-W	01912	01932	01952	01972	01992	02012
1"	1/2"	3"	2"	3N1-1-W	01913	01933	01953	01973	01993	02013

3N1 Double-Ended Countersinks

Two drill point countersinks in one tool. When one end wears, flip for a fresh cutting edge.

HSS Double-Ended

Body Dia.	OAL	Drill Point	Tool Name	60° EDP	82° EDP	90° EDP	100° EDP	110° EDP	120° EDP
1/8"	1-1/2"	.047"	3N1-1/8-DE	01585	01595	01605	01615	01625	01635
3/16"	1-7/8"	.078"	3N1-3/16-DE	01586	01596	01606	01616	01626	01636
1/4"	2"	.109"	3N1-1/4-DE	01587	01597	01607	01617	01627	01637
5/16"	2-1/8"	.125"	3N1-5/16-DE	01588	01598	01608	01618	01628	01638
3/8"	2-1/2"	.141"	3N1-3/8-DE	01589	01599	01609	01619	01629	01639
1/2"	3"	.219"	3N1-1/2-DE	01590	01600	01610	01620	01630	01640
5/8"	3-1/4"	.250"	3N1-5/8-DE	01591	01601	01611	01621	01631	01641
3/4"	3-1/2"	.313"	3N1-3/4-DE	01592	01602	01612	01622	01632	01642

Carbide Double-Ended

Body Dia.	OAL	Drill Point	Tool Name	60° EDP	82° EDP	90° EDP	100° EDP	110° EDP	120° EDP
1/8"	1-1/2"	.047"	3N1-1/8-W-DE	01650	01670	01680	01690	01700	01710
3/16"	2"	.078"	3N1-3/16-W-DE	01651	01671	01681	01691	01701	01711
1/4"	2"	.109"	3N1-1/4-W-DE	01652	01672	01682	01692	01702	01712
5/16"	2-1/8"	.125"	3N1-5/16-W-DE	01653	01673	01683	01693	01703	01713
3/8"	2-1/2"	.141"	3N1-3/8-W-DE	01654	01674	01684	01694	01704	01714
1/2"	3"	.219"	3N1-1/2-W-DE	01655	01675	01685	01695	01705	01715
5/8"	3-1/4"	.250"	3N1-5/8-W-DE	01656	01676	01686	01696	01706	01716
3/4"	3-1/2"	.313"	3N1-3/4-W-DE	01657	01677	01687	01697	01707	01717

3N1-QC Quick-Change System

Interchangeable threaded drill point countersink heads for use with FM-series shanks. Quick tool changes without removing the holder from the spindle: the head threads onto the shank and has a positive lock up on a 60° seat angle. Shanks come in 4", 6" and 8" overall lengths. Available in 5 included angles: 60°, 82°, 90°, 100°, 120°.

3N1-QC Heads

Body Dia.	OAL	Drill Point	Thread	Tool Name	60° EDP	82° EDP	90° EDP	100° EDP	120° EDP
3/8"	1-5/32"	.141"	1/4"-28	3N1-QC-3/8	01800	01810	01820	01830	01840
7/16"	1-5/32"	.188"	1/4"-28	3N1-QC-7/16	01801	01811	01821	01831	01841
1/2"	1-5/32"	.219"	1/4"-28	3N1-QC-1/2	01802	01812	01822	01832	01842
5/8"	1-5/32"	.250"	1/4"-28	3N1-QC-5/8	01803	01813	01823	01833	01843
3/4"	1-13/16"	.313"	3/8"-24	3N1-QC-3/4	01804	01814	01824	01834	01844

FM-Series Shanks (for QC Heads)

Thread Size	Shank Dia.	Shank Dec.	Overall Length	Shoulder Dia.	Shank Name	EDP Number
1/4"-28	1/4"	.250	4"	7/16"	FM-2 Shank	34235
1/4"-28	1/2"	.500	6"	1/2"	FM-2x6 Shank	34239
1/4"-28	1/2"	.500	8"	1/2"	FM-2x8 Shank	34240
3/8"-24	1/4"	.250	4"	9/16"	FM-3 Shank	34236
3/8"-24	5/8"	.625	6"	5/8"	FM-3x6 Shank	34241
3/8"-24	5/8"	.625	8"	5/8"	FM-3x8 Shank	34242

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Regrind Service

Resharpen your 3N1 tools to like-new condition.

Regrind Service Details