 Toolholder Dimensions 4D No. of Inserts Dimension (mm) Spare Parts Max. Clamp Screw Wrench Description Std. Offset Applicable Inserts φDc L1 L2 L3 φd φd1 (Radial) K38 (mm) S40 -DRX390M-4-14 ● 39 257 188 156 +2.8 -DRX400M-4-14 ● 40 261 192 160 54 +2.5 -DRX410M-4-14 ● 41 265 196 164 +2.3 -DRX420M-4-14 ● 42 269 200 168 +2.0 -DRX430M-4-14 ● 2 43 273 204 172 40 +1.8 SB-5090TR DT-20 ZXMT140408 U U -DRX440M-4-14 ● 44 277 208 176 +1.5 -DRX450M-4-14 ● 45 281 212 180 59 +1.3 -DRX460M-4-14 ● 46 285 216 184 +1.0 -DRX470M-4-14 ● 47 289 220 188 +0.8 S50 -DRX480M-4-17 ● 48 290 221 192 +3.8 -DRX490M-4-17 ● 49 294 225 196 +3.5 -DRX500M-4-17 ● 50 298 229 200 59 +3.3 -DRX510M-4-17 ● 51 302 233 204 +3.0 -DRX520M-4-17 ● 52 306 237 208 +2.8 -DRX530M-4-17 ● 53 310 241 212 +2.5 -DRX540M-4-17 ● 2 54 314 245 216 50 +2.3 SB-60120TR DT-25 ZXMT170608 U U -DRX550M-4-17 ● 55 318 249 220 +2.0 -DRX560M-4-17 ● 56 322 253 224 +1.8 -DRX570M-4-17 ● 57 326 257 228 64 +1.5 -DRX580M-4-17 ● 58 330 261 232 +1.3 -DRX590M-4-17 ● 59 334 265 236 +1.0 -DRX600M-4-17 ● 60 338 269 240 +0.8 ·When offset drilling, reduce feed rate to 0.06mm/rev or less. Recommended Cutting Conditions K48 ·Ref. to page K49 for Adjustable Sleeve (SHE type). Trouble shooting K47 K · Hole Dia. Tolerance (4D type) Dc Hole Dia. Tolerance (mm) φ12~φ26 + 0.25 - 0.10 Drilling φ27~φ38 + 0.30 - 0.15 φ39~φ60 + 0.35 - 0.20 * Above is numeric guideline. It may vary depending on machines / workpieces / clamping status / cutting conditions.  : Std. Item K45