Screw Machine - ThunderBit

Triumph ThunderBits are high performance drill bits. Made from industrial grade high speed steel finished in black and bronze oxide to extend the life of your tool. The unique spiral flute design improves chip ejection and allows coolant flow to point. 135 degree split point reduces walking and scarring on your project surface. Specially heavy duty construction means a longer life and a tougher tool.

Triumph Twist Drill - ThunderBit Screw Machine Length Drill

ThunderBit® High Performance drills are made from industrial grade steel. Unique spiral flute design improves chip ejection and coolant flow to the point.
Point:	135° Split Point
Material:	Premium Grade High Speed Steel
Coating/Finish:	Black and Bronze Oxide
Other:	Heavy-Duty Construction

Size	Decimal Equivalent	Flute Length	Overall Length	Pkg Qty	Part #
1/16	0.0625	5/8	1-5/8	12	060404
5/64	0.0781	11/16	1-11/16	12	060405
3/32	0.0938	3/4	1-3/4	12	060406
7/64	0.1094	13/16	1-13/16	12	060407
1/8	0.125	7/8	1-7/8	12	060408
9/64	0.1406	15/16	1-15/16	12	060409
5/32	0.1562	1	2-1/16	12	060410
11/64	0.1719	1-1/16	2-1/8	12	060411
3/16	0.1875	1-1/8	2-3/16	12	060412
13/64	0.2031	1-3/16	2-1/4	12	060413
7/32	0.2188	1-1/4	2-3/8	12	060414
15/64	0.2344	1-5/16	2-7/16	12	060415
1/4	0.25	1-3/8	2-1/2	12	060416
17/64	0.2656	1-7/16	2-5/8	12	060417
9/32	0.2812	1-1/2	2-11/16	12	060418
19/64	0.2969	1-9/16	2-3/4	12	060419
5/16	0.3125	1-5/8	2-13/16	6	060420
21/64	0.3281	1-11/16	2-15/16	6	060421
11/32	0.3438	1-11/16	3	6	060422
23/64	0.3594	1-3/4	3-1/16	6	060423
3/8	0.375	1-13/16	3-1/8	6	060424
25/64	0.3906	1-7/8	3-1/4	6	060425
13/32	0.4062	1-15/16	3-5/16	6	060426
27/64	0.4219	2	3-3/8	6	060427
7/16	0.4375	2-1/16	3-7/16	6	060428
29/64	0.4531	2-1/8	3-9/16	6	060429
15/32	0.4688	2-1/8	3-5/8	6	060430
31/64	0.4844	2-3/16	3-11/16	6	060431
1/2	0.5	2-1/4	3-3/4	6	060432