12-inch Aircraft Extension Drill

Material

HSS, HSS Co

Vertex Angle

135°/118°

Surface Treatment

White、Amber、TiN、TIALN、Bronze、N

Standard

ASME、DIN

Production Technics

Roll forged、fully ground miled

Applications

Suitable for a variety of materials, including metal, plastic and wood.

1.135° /118°Design Limits Walking For Clean，fast Holes.
2.Long Reach For Obstructed Areas
3.Premium Alloy Construction To Extend Life

12-inch Aircraft Extension Drill（ASME）
Diameter(D)	Inch（decimal）	Flute Length(F)	Overall Length(L)
3/64	.0469	3/4	12
1/16	.0625	7/8	12
5/64	.0781	1	12
3/32	.0938	1-1/4	12
7/64	.1094	1-1/2	12
1/8	.1250	1-5/8	12
9/64	.1406	1-3/4	12
5/32	.1562	2	12

12-inch Aircraft Extension Drill（ASME-Number）
Diameter(D)	Inch（decimal）	Flute Length(F)	Overall Length(L)
#1	.2280	2-5/8	12
#3	.2130	2-1/2	12
#4	.2090	2-1/2	12
#5	.2055	2-1/2	12
#7	.2010	2-7/16	12
#9	.1960	2-7/16	12
#10	.1935	2-7/16	12
#11	.1910	2-5/16	12

12-inch Aircraft Extension Drill（ASME-Letter）
Diameter(D)	Inch（decimal）	Flute Length(F)	Overall Length(L)
A	.2340	2-5/8	12
B	.2380	2-3/4	12
C	.2420	2-3/4	12
D	.2460	2-3/4	12
E	.2500	2-3/4	12
F	.2570	2-7/8	12
G	.2610	2-7/8	12
H	.2660	2-7/8	12

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