2×D Type  Toolholder Dimensions No. of Inserts Dimension (mm) Spare Parts Max. Clamp Screw Wrench Plug Description Std. Offset Applicable Inserts φDc L1 L2 L3 φd φd1 Rc (Radial) K53 (mm) S40 -DRZ3366-12 ● 33 173 104 66 +2.9 -DRZ3468-12 ● 34 176 107 68 +2.7 -DRZ3570-12 ● 35 177 108 70 +2.4 -DRZ3672-12 ● 2 36 180 111 72 40 55 Rc1/4 +2.2 SB-5085TR DT-20 GP-2 ZCMT12T306 -DRZ3774-12 ● 37 181 112 74 +1.9 ZCMT12T304SP -DRZ3876-12 ● 38 183 114 76 +1.7 -DRZ3978-12 ● 39 185 116 78 +1.4 -DRZ4080-12 ● 40 185 116 80 +1.2 -DRZ4182-15 ● 41 186 117 82 +4.0 -DRZ4284-15 ● 42 188 119 84 +3.7 -DRZ4386-15 ● 43 190 121 86 55 +3.5 -DRZ4488-15 ● 44 192 123 88 +3.2 -DRZ4590-15 ● 45 192 123 90 +3.0 -DRZ4692-15 ● 46 198 129 92 +2.7 ZCMT150408 -DRZ4794-15 ● 2 47 201 132 94 40 Rc1/4 +2.5 SB-5085TR DT-20 GP-2 ZCMT150406SP -DRZ4896-15 ● 48 203 134 96 +2.2 -DRZ4998-15 ● 49 204 135 98 60 +2.0 -DRZ50100-15 ● 50 204 135 100 +1.7 -DRZ51102-15 ● 51 205 136 102 +1.2 -DRZ52104-15 ● 52 205 136 104 +1.0 -DRZ53106-15 ● 53 208 139 106 +0.7 -DRZ54108-20 ● 54 214 145 108 +5.0 -DRZ55110-20 ● 55 215 146 110 +4.7 -DRZ56112-20 ● 2 56 217 148 112 40 65 Rc1/4 +4.4 SB-60120TR DT-25 GP-2 ZCMT200608 -DRZ57114-20 ● 57 219 150 114 +4.1 K -DRZ58116-20 ● 58 221 152 116 +3.8 -DRZ59118-20 ● 59 223 154 118 +3.5 · When offset drilling, reduce feed rate to 0.08mm/rev or less. Recommended Cutting Conditions K65 · Hole Dia. Tolerance (2D type) Dc Hole Dia. Tolerance (mm) Drilling φ13~φ26.5 + 0.20 - 0.10 φ27~φ40 + 0.25 - 0.15 φ41~φ59 + 0.30 - 0.20 * Above is numeric guideline. It may vary depending on machines / workpieces / clamping status / cutting conditions.  : Std. Item K57