HSS Taper Length Straight Shank Twist Drills

Spu:

ASME B.94.11M

Introduction

Amsuo HSS Taper Length Straight Shank Twist Drills — 1/16"–1/2", ASME B.94.11M

Extended-length straight shank drills for deep-hole access — M2 quality, ASME B.94.11M. The taper length range from 1/16" to 1/2" reaches deep workpieces beyond jobber length, with M2 steel suited to stainless steel and other hard materials — coolant recommended for production runs. Factory-direct from a 20-year precision-tools manufacturer with ISO 9001 / 14001 / 45001 triple-system certification.

Amsuo HSS taper length straight shank twist drills

Key Benefits

M2 high-speed steel for heat resistance and edge life
ASME B.94.11M taper-length geometry for deep holes
Sizes from 1/16" to 1/2" with flute lengths listed below
Suited to stainless steel and hard materials with coolant

Size Range & Details

Amsuo HSS Taper Length Straight Shank Twist Drills — 1/16"–1/2", ASME B.94.11M

M2 quality
Manufactured as per ASME B.94.11M
Suited to drill stainless steel and other hard materials
Coolant recommended

Φd (inch)	Φd (mm)	L1 (mm)	L2 (mm)
1/16"	1.58	76	44
5/64"	1.98	95	51
3/32"	2.38	108	57
7/64"	2.78	117	64
1/8"	3.17	137	76
9/64"	3.57	137	76
5/32"	3.96	137	76
11/64"	4.37	146	86
3/16"	4.76	146	86
13/64"	5.16	152	92
7/32"	5.56	152	92
15/64"	5.95	156	95
1/4"	6.35	156	95
17/64"	6.75	159	98
9/32"	7.14	159	98
19/64"	7.54	162	102
5/16"	7.94	162	102
21/64"	8.33	171	105
11/32"	8.73	165	105
23/64"	9.13	171	108
3/8"	9.52	171	108
25/64"	9.92	178	111
13/32"	10.32	178	111
27/64"	10.72	184	117
7/16"	11.11	184	117
29/64"	11.51	190	121
15/32"	11.9	190	121
31/64"	12.3	197	121
1/2"	12.7	197	121

Quality & Certification

Manufactured to ASME B.94.11M in an ISO 9001 / 14001 / 45001 triple-certified facility — every drill is inspected before packing.

FAQ

When should I use a taper length drill?

When hole depth exceeds jobber flute length — for deep bores, thick assemblies and awkward access points.

Why is coolant recommended?

Long flutes create more friction; coolant controls edge temperature and clears chips from deep holes.

Can these drills be private-labeled?

Yes — custom branding, packaging and bulk size-assortment programs are available.

Get a Quotation

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