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