REAMERS USER GUIDE Reamer Manufacturing Tolerances Nominal Diameter of Reamer Manufacturing Tolerances DIN 1420 Reamer D1 in mm Admissible maximum and minimum reamer dimensions of nominal diameter d1 in µm for drilling tolerance range Over Up to A9 A11 B8 B9 B10 B11 C8 C9 C10 C11 1 3 +291 +321 +151 +161 +174 +191 + 71 + 81 + 94 +111 +282 +300 +146 +152 +160 +170 + 66 + 72 + 80 + 90 3 6 +295 +333 +155 +165 +180 +203 + 85 + 95 +110 +133 +284 +306 +148 +154 +163 +176 + 78 + 84 + 93 +106 6 10 +310 +356 +168 +180 +199 +226 + 98 +110 +129 +156 +297 +324 +160 +167 +178 +194 + 90 + 97 +108 +124 10 18 +326 +383 +172 +186 +209 +243 +117 +131 +154 +188 +310 +344 +162 +170 +184 +204 +107 +115 +129 +149 18 30 +344 +410 +188 +204 +231 +270 +138 +154 +181 +220 +325 +364 +176 +185 +201 +224 +126 +135 +151 +174 30 40 +362 +446 +203 +222 +255 +206 +153 +172 +205 +256 +340 +390 +189 +200 +220 +250 +139 +150 +170 +200 40 50 +372 +456 +213 +232 +265 +316 +163 +182 +215 +266 +350 +400 +199 +210 +230 +260 +149 +160 +180 +210 50 65 +402 +501 +229 +252 +292 +351 +179 +202 +242 +301 +376 +434 +212 +226 +250 +284 +162 +176 +200 +234 65 80 +422 +521 +239 +262 +302 +361 +189 +212 +252 +311 +396 +454 +222 +236 +260 +294 +172 +186 +210 +244 80 100 +453 +567 +265 +293 +339 +407 +215 +243 +289 +357 +422 +490 +246 +262 +290 +330 +196 +212 +240 +280 100 120 +483 +597 +285 +313 +359 +427 +225 +253 +299 +367 +452 +520 +266 +282 +310 +350 +206 +222 +250 +290 120 140 +545 +672 +313 +345 +396 +472 +253 +285 +336 +412 +510 +584 +290 +310 +340 +384 +230 +250 +280 +324 140 160 +605 +732 +333 +365 +416 +492 +263 +295 +346 +422 +570 +644 +310 +330 +360 +404 +240 +260 +290 +334 160 180 +665 +792 +363 +395 +446 +522 +283 +315 +366 +442 +630 +704 +340 +360 +390 +434 +260 +280 +310 +354 Over Up to D8 D9 D10 D11 E7 E8 E9 F6 F7 F8 F9 G6 G7 1 3 + 31 + 41 + 54 + 71 + 22 + 25 + 35 + 11 + 14 + 17 + 27 + 7 + 10 + 26 + 32 + 40 + 50 + 18 + 20 + 26 + 8 + 10 + 12 + 18 + 4 + 6 3 6 + 45 + 55 + 70 + 93 + 30 + 35 + 45 + 16 + 20 + 25 + 35 + 10 + 14 + 38 + 44 + 53 + 66 + 25 + 28 + 34 + 13 + 15 + 18 + 24 + 7 + 9 6 10 + 58 + 70 + 89 +116 + 37 + 43 + 55 + 20 + 25 + 31 + 43 + 12 + 17 + 50 + 57 + 68 + 84 + 31 + 35 + 42 + 16 + 19 + 23 + 30 + 8 + 11 10 18 + 72 + 86 +109 +143 + 47 + 54 + 68 + 25 + 31 + 38 + 52 + 15 + 21 + 62 + 70 + 84 +104 + 40 + 44 + 52 + 21 + 24 + 28 + 36 + 11 + 14 18 30 + 93 +109 +136 +175 + 57 + 68 + 84 + 31 + 37 + 48 + 64 + 18 + 24 + 81 + 90 +106 +129 + 49 + 56 + 65 + 26 + 29 + 36 + 45 + 13 + 16 30 50 +113 +132 +165 +216 + 71 + 83 + 102 + 38 + 46 + 58 + 77 + 22 + 30 + 99 +110 +130 +160 + 62 + 69 + 80 + 32 + 37 + 44 + 55 + 16 + 21 50 80 +139 +162 +202 +261 + 5 + 99 +122 + 46 + 55 + 69 + 92 + 26 + 35 +122 +136 +160 +194 + 74 + 82 + 96 + 39 + 44 + 52 + 66 + 19 + 24 80 120 +165 +193 +239 +307 +101 +117 +145 + 54 + 65 + 81 +109 + 30 + 41 +146 +162 +190 +230 + 88 + 98 +114 + 46 + 52 + 62 + 78 + 22 + 28 120 180 +198 +230 +281 +357 +119 +138 +170 + 64 + 77 + 96 + 128 + 35 + 48 +175 +195 +225 +269 +105 +115 +135 + 55 + 63 + 73 + 93 + 26 + 34 330 ISCAR