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GDV Weldon (W) Type Cylindrical (C) Type Whistle Notch (S) Type
LS
Shanks for SUMOGUN
Modular Gundrills with THSZWS DCONMSg6
Threaded Connection GUNDRILLS

Designation THSZWS DCONMS Shank (1) LS
GDV56-MF16X1-I-WN.75" MF16X1 .750 S 2.75
GDV99-MF16X1-I-W.75" MF16X1 .750 W 2.75
GDV10-MF16X1-M-C20 MF16X1 .787 C 1.97
GDV22-MF16X1-M-W20 MF16X1 .787 W 1.97
GDV80-MF16X1-I-WN1.00" MF16X1 1.000 WN 2.75
GDV11-MF20X1-M-C25 MF20X1 .984 C 2.20
GDV23-MF20X1-M-W25 MF20X1 .984 W 2.20
GDV57-MF20X1-M-WN25 MF20X1 .984 S 2.76
GDV100-MF20X1-I-W1.00" MF20X1 1.000 W 2.28
GDV58-MF20X1-I-WN1.00" MF20X1 1.000 S 2.75
GDV101-MF20X1-I-W1.25" MF20X1 1.250 W 2.28
GDV97-MF20X1-I-C1.25" MF20X1 1.250 C 2.28
GDV12-MF20X1-M-C32 MF20X1 1.260 C 2.36
GDV24-MF20X1-M-W32 MF20X1 1.260 W 2.36
GDV13-MF20X1-M-C40 MF20X1 1.575 C 2.76
GDV25-MF20X1-M-W40 MF20X1 1.575 W 2.76
(1) W-Weldon, C-Cylindrical, S-Whistle notch 15°, WN-Whistle notch
For tools, see pages: MNSNT (354)

Machining Conditions for MNSNT
SUMOGUN
Feed vs. Drill Diameter

Tensile Hardness HB Material Group No. D=.394-.469 D=.472-.547 D=.551-.625 D=.630-.783 D=.787-1.020
Strength
ISO Material Condition [ksi] V SFM inch/rev
<0.25% C Annealed 61 125 1 260-360-460
≥0.25% C Annealed 94 190 2 260-345-425 .0059 .0071 0079 .0098 .0098
Non-alloy steel and cast
steel, free cutting steel <0.55% C Quenched and tempered 123 250 3 260-325-390 .0071 .0083 .0091 .0118 .0118
.0083 .0094 .0106 .0138 .0138
220 4
109
Annealed
230-295-360
≥0.55% C
Quenched and tempered 145 300 5 165-230-295
Annealed 87 200 6 260-325-390
Low alloy and cast steel 135 275 7 230-295-360 .0055 .0063 .0071 .0091 .0098
P (less than 5% of alloying elements) Quenched and tempered 145 300 8 165-230-295 .0067 .0079 .0087 .0106 .0118
.0083 .0094 .0102 .0122 .0138
174 350 9 130-180-230
Annealed 99 200 10 165-230-260 .0047 .0059 .0071 .0079 .0087
High alloyed steel, cast steel, .0055 .0067 .0079 .0087 .0094
and tool steel Quenched and tempered 160 325 11 130-195-260
.0063 .0079 .0091 .0098 .0106
Ferritic/martensitic 99 200 12 .0047 .0055 .0063 .0063 .0071
Stainless steel and cast steel 130-180-230 .0051 .0059 .0071 .0075 .0083
Martensitic 119 240 13
.0059 .0063" .0079" .0083 .0094
Ferritic/pearlitic 180 15 295-410-525
Gray cast iron (GG)
Pearlitic/martensitic 260 16 260-360-460
Ferritic 160 17 295-440-590 .0079 .0098 .0118 .0138 .0138
K Nodular cast iron (GGG) .0091 .0110 .0130 .0157 .0165
Pearlitic 250 18 260-360-460 .0106 .0126 .0146 .0177 .0185
Ferritic 130 19 295-410-525
Malleable cast iron
Pearlitic 230 20 260-360-460
Not cureable 60 21
Aluminum-wrought alloys
Cured 100 22 .0098 .0118 .0138 .0157 .0177
N ≤12% Si Not cureable 75 23 295-505-720 .0110 .0130 .0150 .0177 .0197
Aluminum-cast alloys Cured 90 24 .0126 .0146 .0165 .0197 .0224
>12% Si High temperature 130 25 260-390-525
• Mandatory use of emulsion or oil when drilling
• For the 15.748” long tools reduce the cutting speed by 20%.
Recommended cutting data
355