4×D Type  Toolholder Dimensions No. of Inserts Dimension (mm) Spare Parts Max. Clamp Screw Wrench Plug Applicable Inserts Description Std. Offset φDc L1 L2 L3 φd φd1 Rc (Radial) K53 (mm) S40 -DRZ33132-12 ● 33 236 167 132 +2.9 -DRZ34136-12 ● 34 241 172 136 +2.7 -DRZ35140-12 ● 35 244 175 140 +2.4 -DRZ36144-12 ● 2 36 249 180 144 40 55 Rc1/4 +2.2 SB-5085TR DT-20 GP-2 ZCMT12T306 -DRZ37148-12 ● 37 252 183 148 +1.9 ZCMT12T304SP -DRZ38152-12 ● 38 256 187 152 +1.7 -DRZ39156-12 ● 39 260 191 156 +1.4 -DRZ40160-12 ● 40 262 193 160 +1.2 -DRZ41164-15 ● 41 265 196 164 +4.0 -DRZ42168-15 ● 42 269 200 168 +3.7 -DRZ43172-15 ● 43 273 204 172 55 +3.5 -DRZ44176-15 ● 44 277 208 176 +3.2 -DRZ45180-15 ● 2 45 279 210 180 40 Rc1/4 +3.0 SB-5085TR DT-20 GP-2 ZCMT150408 -DRZ46184-15 ● 46 287 218 184 +2.7 ZCMT150406SP -DRZ47188-15 ● 47 292 223 188 +2.5 -DRZ48192-15 ● 48 296 227 192 60 +2.2 -DRZ49196-15 ● 49 300 231 196 +2.0 -DRZ50200-15 ● 50 301 232 200 +1.7 · When offset drilling, reduce feed rate to 0.06mm/rev or less. Recommended Cutting Conditions K65 · Hole Dia. Tolerance (4D type) Dc Hole Dia. Tolerance (mm) φ13~φ26.5 + 0.25 - 0.10 φ27~φ40 + 0.30 K - 0.15 φ41~φ50 + 0.35 - 0.20 * Above is numeric guideline. It may vary depending on machines / workpieces / clamping status / cutting conditions. Drilling  : Std. Item K61