AMC 2026 catalogue

Machining

Drill Bits

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MACHINING

Cobalt Taper Length Drills

▪135° split point, gold finish ▪Designed for stainless steel and other tough alloy steels ▪Also available in wire sizes #1 to #60 and letter sizes A to Z

CSBDR29034

Size (in.)

Flute Length

(in.)

Length

(in.)

Item

No. 1⁄16 1 3⁄4 3 CSBDR29004 5⁄64 2 3 3⁄4 CSBDR29005 3⁄32 2 1⁄4 4 1⁄4 CSBDR29006 7⁄64 2 1⁄2 4 5⁄8 CSBDR29007 1⁄8 2 3⁄4 5 1⁄8 CSBDR29008 9⁄64 3 5 3⁄8 CSBDR29009 5⁄32 3 5 3⁄8 CSBDR29010 11⁄64 3 3⁄8 5 3⁄4 CSBDR29011 3⁄16 3 3⁄8 5 3⁄4 CSBDR29012 13⁄64 3 5⁄8 6 CSBDR29013 7⁄32 3 5⁄8 6 CSBDR29014 15⁄64 3 3⁄4 6 1⁄8 CSBDR29015 1⁄4 3 3⁄4 6 1⁄8 CSBDR29016 17⁄64 3 7⁄8 6 1⁄4 CSBDR29017 9⁄32 3 7⁄8 6 1⁄4 CSBDR29018 19⁄64 4 6 3⁄8 CSBDR29019

Size (in.)

Flute Length

(in.)

Length

(in.)

Item

No. 5⁄16 4 6 3⁄8 CSBDR29020 21⁄64 4 1⁄8 6 1⁄2 CSBDR29021 11⁄32 4 1⁄8 6 1⁄2 CSBDR29022 23⁄64 4 1⁄4 6 3⁄4 CSBDR29023 3⁄8 4 1⁄4 6 3⁄4 CSBDR29024 25⁄64 4 3⁄8 7 CSBDR29025 13⁄32 4 3⁄8 7 CSBDR29026 27⁄64 4 5⁄8 7 1⁄4 CSBDR29027 7⁄16 4 5⁄8 7 1⁄4 CSBDR29028 29⁄64 4 3⁄4 7 1⁄2 CSBDR29029 15⁄32 4 3⁄4 7 1⁄2 CSBDR29030 31⁄64 4 3⁄4 7 1⁄2 CSBDR29031 1⁄2 4 3⁄4 7 3⁄4 CSBDR29032 33⁄64 4 3⁄4 8 CSBDR29033 17⁄32 4 3⁄4 8 CSBDR29034 35⁄64 4 7⁄8 8 1⁄4 CSBDR29035

Size (in.)

Flute Length

(in.)

Length

(in.)

Item

No. 9⁄16 4 7⁄8 8 1⁄4 CSBDR29036 37⁄64 4 7⁄8 8 3⁄4 CSBDR29037 19⁄32 4 7⁄8 8 3⁄4 CSBDR29038 39⁄64 4 7⁄8 8 3⁄4 CSBDR29039 5⁄8 4 7⁄8 8 3⁄4 CSBDR29040 41⁄64 5 1⁄8 9 CSBDR29041 21⁄32 5 1⁄8 9 CSBDR29042 43⁄64 5 3⁄8 9 1⁄4 CSBDR29043 11⁄16 5 3⁄8 9 1⁄4 CSBDR29044 45⁄64 5 5⁄8 9 1⁄2 CSBDR29045 23⁄32 5 5⁄8 9 1⁄2 CSBDR29046 47⁄64 5 7⁄8 9 3⁄4 CSBDR29047 3⁄4 5 7⁄8 9 3⁄4 CSBDR29048 49⁄64 6 9 7⁄8 CSBDR29049 25⁄32 6 9 7⁄8 CSBDR29050 51⁄64 6 1⁄8 10 CSBDR29051

Size (in.)

Flute Length

(in.)

Length

(in.)

Item

No. 13⁄16 6 1⁄8 10 CSBDR29052 53⁄64 6 1⁄8 10 CSBDR29053 27⁄32 6 1⁄8 10 CSBDR29054 55⁄64 6 1⁄8 10 CSBDR29055 7⁄8 6 1⁄8 10 CSBDR29056 57⁄64 6 1⁄8 10 CSBDR29057 29⁄32 6 1⁄8 10 CSBDR29058 59⁄64 6 1⁄8 10 3⁄4 CSBDR29059 15⁄16 6 1⁄8 10 3⁄4 CSBDR29060 61⁄64 6 3⁄8 11 CSBDR29061 31⁄32 6 3⁄8 11 CSBDR29062 63⁄64 6 3⁄8 11 CSBDR29063 1 6 3⁄8 11 CSBDR29100

CLARKSON-OSBORN

Production Grade Taper Length HSS Drill Bits, 118°

▪Conventional point ▪Black oxide finish Provide longer flute and overall length for deeper drilling and hard-to-reach applications.

GNF120-49708

Size

Decimal Equivalent Flute Length Overall Length List Number

Item

No. 1⁄8 in 0.125 2 3⁄4 in 5 1⁄8 in 120 GNF120-49708 9⁄64 in 0.1406 3 in 5 3⁄8 in 120 GNF120-49709 5⁄32 in 0.1563 3 in 5 3⁄8 in 120 GNF120-49710 11⁄64 in 0.1719 3 3⁄8 in 5 3⁄4 in 120 GNF120-49711 3⁄16 in 0.1875 3 3⁄8 in 5 3⁄4 in 120 GNF120-49712 13⁄64 in 0.2031 3 5⁄8 in 6 in 120 GNF120-49713 7⁄32 in 0.2188 3 5⁄8 in 6 in 120 GNF120-49714 15⁄64 in 0.2344 3 3⁄4 in 6 1⁄8 in 120 GNF120-49715 1⁄4 in 0.25 3 3⁄4 in 6 1⁄8 in 120 GNF120-49716 17⁄64 in 0.2656 3 7⁄8 in 6 1⁄4 in 120 GNF120-49717 9⁄32 in 0.2813 3 7⁄8 in 6 1⁄4 in 120 GNF120-49718 19⁄64 in 0.2969 4 in 6 3⁄8 in 120 GNF120-49719 5⁄16 in 0.3125 4 in 6 3⁄8 in 120 GNF120-49720 21⁄64 in 0.3281 4 1⁄8 in 6 1⁄2 in 120 GNF120-49721 11⁄32 in 0.3438 4 1⁄8 in 6 1⁄2 in 120 GNF120-49722 23⁄64 in 0.3594 4 1⁄4 in 6 3⁄4 in 120 GNF120-49723 3⁄8 in 0.375 4 1⁄4 in 6 3⁄4 in 120 GNF120-49724 25⁄64 in 0.3906 4 3⁄8 in 7 in 120 GNF120-49725 13⁄32 in 0.4063 4 3⁄8 in 7 in 120 GNF120-49726 27⁄64 in 0.4219 4 5⁄8 in 7 1⁄4 in 120 GNF120-49727 7⁄16 in 0.4375 4 5⁄8 in 7 1⁄4 in 120 GNF120-49728 29⁄64 in 0.4531 4 3⁄4 in 7 1⁄2 in 120 GNF120-49729 15⁄32 in 0.4688 4 3⁄4 in 7 1⁄2 in 120 GNF120-49730 31⁄64 in 0.4844 4 3⁄4 in 7 3⁄4 in 120 GNF120-49731 1⁄2 in 0.5 4 3⁄4 in 7 3⁄4 in 120 GNF120-49732 17⁄32 in 0.5313 4 3⁄4 in 8 in 120 GNF120-49734 9⁄16 in 0.5625 4 7⁄8 in 8 1⁄4 in 120 GNF120-49736 19⁄32 in 0.5938 4 7⁄8 in 8 3⁄4 in 120 GNF120-49738 5⁄8 in 0.625 4 7⁄8 in 8 3⁄4 in 120 GNF120-49740 21⁄32 in 0.6563 5 1⁄8 in 9 in 120 GNF120-49742 23⁄32 in 0.7188 5 5⁄8 in 9 1⁄2 in 120 GNF120-49746

CHICAGO-LATROBE

Production Grade Extra-Length HSS Aircraft Drill Bits, 135°

GNF3957-12-13233

Drill Bit Size

Decimal Equivalent Flute Length

Overall Length List Number

Item

No.

1⁄16 in 0.0625 7⁄8 in 6 in 3957 GNF3957-6-13101 0.0625 7⁄8 in 12 in 3957 GNF3957-12-13176 #50 0.07 1 in 6 in 3957 GNF3957-6-13172

3⁄32 in 0.0938 1 1⁄4 in 6 in 3957 GNF3957-6-13103 0.0938 1 1⁄4 in 12 in 3957 GNF3957-12-13178 #41 0.096 1 3⁄8 in 6 in 3957 GNF3957-6-13163

#40 0.098 1 3⁄8 in 12 in 3957 GNF3957-12-13244 0.098 1 3⁄8 in 6 in 3957 GNF3957-6-13162

1⁄8 in 0.125 1 5⁄8 in 6 in 3957 GNF3957-6-13105 0.125 1 5⁄8 in 12 in 3957 GNF3957-12-13180

#30 0.1285 1 5⁄8 in 12 in 3957 GNF3957-12-13241 0.1285 1 5⁄8 in 6 in 3957 GNF3957-6-13152

#29 0.136 1 3⁄4 in 12 in 3957 GNF3957-12-13240 0.136 1 3⁄4 in 6 in 3957 GNF3957-6-13151

#27 0.144 1 7⁄8 in 12 in 3957 GNF3957-12-13238 0.144 1 7⁄8 in 6 in 3957 GNF3957-6-13149

5⁄32 in 0.1563 2 in 6 in 3957 GNF3957-6-13107 0.1563 2 in 12 in 3957 GNF3957-12-13182

#21 0.159 2 1⁄8 in 12 in 3957 GNF3957-12-13234 0.159 2 1⁄8 in 6 in 3957 GNF3957-6-13143

#20 0.161 2 1⁄8 in 12 in 3957 GNF3957-12-13233 0.161 2 1⁄8 in 6 in 3957 GNF3957-6-13142

3⁄16 in 0.1875 2 5⁄16 in 6 in 3957 GNF3957-6-13109 0.1875 2 5⁄16 in 12 in 3957 GNF3957-12-13184

#10 0.1935 2 7⁄16 in 6 in 3957 GNF3957-6-13132 0.1935 2 7⁄16 in 12 in 3957 GNF3957-12-13226

7⁄32 in 0.2188 2 1⁄2 in 6 in 3957 GNF3957-6-13111 0.2188 2 1⁄2 in 12 in 3957 GNF3957-12-13186

1⁄4 in 0.25 2 3⁄4 in 6 in 3957 GNF3957-6-13113 0.25 2 3⁄4 in 12 in 3957 GNF3957-12-13188

9⁄32 in 0.2813 2 15⁄16 in 12 in 3957 GNF3957-12-13190 0.2813 2 15⁄16 in 6 in 3957 GNF3957-6-13114

5⁄16 in 0.3125 3 3⁄16 in 12 in 3957 GNF3957-12-13192 0.3125 3 3⁄16 in 6 in 3957 GNF3957-6-13115

11⁄32 in 0.3438 3 7⁄16 in 12 in 3957 GNF3957-12-13194 0.3438 3 7⁄16 in 6 in 3957 GNF3957-6-13116

3⁄8 in 0.375 3 5⁄8 in 12 in 3957 GNF3957-12-13196 0.375 3 5⁄8 in 6 in 3957 GNF3957-6-13117

13⁄32 in 0.4063 3 7⁄8 in 12 in 3957 GNF3957-12-13198 0.4063 3 7⁄8 in 6 in 3957 GNF3957-6-13118

7⁄16 in 0.4375 4 1⁄16 in 12 in 3957 GNF3957-12-13200 0.4375 4 1⁄16 in 6 in 3957 GNF3957-6-13119 15⁄32 in 0.4688 4 5⁄16 in 12 in 3957 GNF3957-12-13202

1⁄2 in 0.5 4 1⁄2 in 12 in 3957 GNF3957-12-13204 0.5 4 1⁄2 in 6 in 3957 GNF3957-6-13121

CLEVELAND

▪Split point ▪Straight shank ▪Bright finish Use to drill holes in deep or inaccessible places that cannot be reached with regular length drills. Jobbers length flute makes drills more rigid. Designed for the aerospace industry and meet National Aerospace Standards (NAS) 907, Type B.