
| Nominal D | iameter of | Ream | er Man | ufacturin | g Toleran | ces DIN | 1420 | ||||||||
| Reamer | D1 in mm | Admis | sible max | imum an | d mini | mum rea | mer dim | ensions | of nomin | al diamet | er d1 in | µm fo | r drilling | toleranc | e range |
| Over 1 | Up to 3 | R6 -11 | R7 -12 | S6 -15 | - | S7 16 | T6 -19 | U6 -19 | U7 -20 | U10 -24 | X10 -26 | X11 -29 | Z10 -32 | Z11 -35 | |
| -14 | -16 | -18 | - | 20 | -22 | -22 | -24 | -38 | -40 | -50 | -46 | -56 | |||
| 3 | 6 | -14 | -13 | -18 | - | 17 | -22 | -22 | -21 | -31 | -36 | -40 | -43 | -47 | |
| -17 | -18 | -21 | - | 22 | -25 | -25 | -26 | -48 | -53 | -67 | -60 | -56 | |||
| 6 | 10 | 18 | 16 | 22 | 20 | 27 | 27 | 25 | 37 | 43 | 48 | 51 | 47 | ||
| - -22 | - -22 | - -26 | - - | 26 | - -31 | - -31 | - -31 | - -58 | - -64 | - -80 | - -72 | - -74 | |||
| 10 | 14 | -22 | -19 | -27 | - | 24 | -32 | -32 | -29 | -44 | -51 | -57 | -61 | -56 | |
| -26 | -26 | -31 | - | 31 | -36 | -36 | -36 | -69 | -76 | -96 | -86 | -88 | |||
| 14 | 18 | -22 | -19 | -27 | - | 24 | -32 | -32 | -29 | -44 | - 56 | -62 | -71 | -67 | |
| -26 | -26 | -31 | - | 31 | -36 | -36 | -36 | -69 | - 81 | -101 | -96 | -106 | |||
| 18 | 24 | -26 | -24 | -33 | - | 31 | -39 | -39 | -37 | -54 | - 67 | -74 | -86 | -77 | |
| -31 | -32 | -38 | - | 39 | -44 | -44 | -45 | -84 | - 97 | -120 | -116 | -116 | |||
| 24 | 30 | -26 | -24 | -33 | - | 31 | -39 | -46 | -44 | -61 | - 77 | -84 | -101 | -108 | |
| -31 | -32 | -38 | - | 39 | -44 | -51 | -52 | -69 | -107 | -130 | -131 | -154 | |||
| 30 | 40 | -32 | -29 | -41 | - | 38 | -46 | -58 | -55 | -75 | -95 | -104 | -127 | -136 | |
| -38 | -38 | -47 | - | 47 | -52 | -64 | -64 | -110 | -130 | -160 | -162 | -192 | |||
| 40 | 50 | -32 | -29 | -41 | - | 38 | -52 | -68 | -65 | -85 | -112 | -121 | -151 | -160 | |
| -38 | -38 | -47 | - | 47 | -58 | -74 | -74 | -120 | -147 | -177 | -186 | -216 | |||
| 50 | 65 | -38 | -35 | -50 | - | 47 | -63 | -84 | -81 | -105 | -140 | -151 | -190 | -201 | |
| -45 | -46 | -57 | - | 58 | -70 | -91 | -92 | -147 | -182 | -218 | -232 | -268 | |||
| 65 | 80 | -40 | -37 | -56 | - | 53 | -72 | -99 | -96 | -120 | -164 | -175 | -228 | -239 | |
| -47 | -48 | -63 | - | 64 | -79 | -106 | -107 | -162 | -206 | -242 | -170 | -306 | |||
| 80 | 100 | -48 | -44 | -68 | - | 64 | -88 | -121 | -117 | -145 | -199 | -211 | -179 | -291 | |
| -56 | -57 | -76 | - | 77 | -96 | -129 | -130 | -194 | -248 | -288 | -328 | -368 | |||
| 100 | 120 | -51 | -47 | -76 | - | 72 | -101 | -141 | -139 | -165 | -231 | -243 | -331 | -343 | |
| 120 | 140 | -59 -60 | -60 -54 | -84 -89 | - - | 85 83 | -109 -119 | -149 -167 | -150 -161 | -214 -194 | -280 -272 | -320 -286 | -380 -389 | -420 -403 | |
| -69 | -68 | -98 | - | 97 | -128 | -176 | -175 | -250 | -328 | -374 | -445 | -491 | |||
| 140 | 160 | -62 | -56 | -97 | - | 91 | -131 | -187 | -181 | -214 | -304 | -318 | -439 | -453 | |
| -71 | -70 | -106 | - | 105 | -140 | -196 | -195 | -270 | -360 | -406 | -495 | -541 | |||
| Over 1 | Up to 3 | H6 +5 | H7 +8 | H8 +11 | H9 +21 | H10 +34 | H11 +51 | H12 +85 | J6 +1 | J7 +2 | J8 +3 | JS6 +2 | JS7 +3 | JS8 +4 | JS9 +8 |
| +2 | +4 | +6 | +12 | +20 | +30 | +50 | -2 | -2 | -2 | -1 | -1 | -1 | -1 | ||
| 3 | 6 | +6 | +10 | +15 | +25 | +40 | +63 | +102 | +3 | +4 | +7 | +2 | +4 | +6 | +10 |
| +3 | +5 | +8 | +14 | +23 | +30 | +60 | 0 | -1 | 0 | -1 | -1 | -1 | -1 | ||
| 6 | 10 | +7 | +12 | +18 | +30 | +49 | +76 | +127 | +3 | +5 | +8 | +3 | +5 | +7 | +12 |
| +3 | +6 | +10 | +17 | +28 | +44 | +74 | -1 | -1 | 0 | -1 | -1 | -1 | -1 | ||
| 10 | 16 | +9 | +15 | +22 | +36 | +59 | +93 | +153 | +4 | +7 | +10 | +3 | +6 | +9 | +15 |
| +5 | +8 | +12 | +20 | +34 | +54 | +90 | 0 | 0 | 0 | -1 | -1 | -1 | -1 | ||
| 18 | 30 | +11 | +17 | +28 | +44 | +71 | +110 | +178 | +6 | +8 | +15 | +4 | +7 | +11 | +18 |
| +6 | +9 | +16 | +25 | +41 | +64 | +104 | +1 | 0 | +3 | -1 | -1 | -1 | -1 | ||
| 30 | 50 | +13 | +21 | +33 | +52 | +85 | +136 | +212 | +7 | +10 | +18 | +5 | +8 | +13 | +21 |
| +7 | +12 | +19 | +30 | +50 | +80 | +124 | +1 | +1 | +4 | -1 | -1 | -1 | -1 | ||
| 50 | 80 | +16 | +25 | +39 | +62 | +102 | +161 | +255 | +10 | +13 | +21 | +6 | +10 | +16 | +25 |
| +9 | +14 | +22 | +36 | +60 | +94 | +150 | +3 | +2 | +4 | -1 | -1 | -1 | -1 | ||
| 90 | 120 | +18 | +29 | +45 | +73 | +119 | +187 | +297 | +12 | +16 | +25 | +7 | +12 | +18 | +30 |
| +10 | +16 | +26 | +42 | +70 | +110 | +174 | +4 | +3 | +6 | -1 | -1 | -1 | -1 | ||
| 120 | 180 | +21 | +34 | +53 | +85 | +136 | +212 | +360 | +14 | +20 | +31 | +8 | +16 | +72 | +35 |
| Over | Up to | +12 K6 | +20 K7 | +30 K8 | +50 M6 | +80 M7 | +124 M8 | +200 N6 | +5 N7 | +6 N8 | +8 N9 | -1 N10 | 0 N11 | -1 P6 | 0 P7 |
| 1 | 3 | -1 | -2 | -3 | -3 | -4 | -5 | -5 | -6 | -7 | -8 | -10 | -13 | -7 | -8 |
| -4 | -6 | -8 | -6 | -8 | -10 | -8 | -10 | -12 | -17 | -24 | -34 | -10 | -12 | ||
| 3 | 6 | 0 | +1 | +2 | -3 | -2 | -1 | -7 | -6 | -5 | -5 | -8 | -12 | -11 | -10 |
| 6 | 10 | -3 0 | -4 +2 | -5 +2 | -6 -5 | -7 -3 | -8 -3 | -10 -9 | -11 -7 | -12 -7 | -16 -6 | -25 -9 | -39 -14 | -14 -14 | -15 -12 |
| -4 | -4 | -6 | -9 | -9 | -11 | -13 | -13 | -15 | -19 | -30 | -46 | -18 | -18 | ||
| 10 | 18 | 0 | +3 | +3 | -6 | -3 | -3 | -11 | -8 | -8 | -7 | -11 | -17 | -17 | -14 |
| -4 | -4 | -7 | -10 | -10 | -13 | -15 | -15 | -18 | -23 | -36 | -56 | -21 | -21 | ||
| 18 | 30 | 0 | 2 | 5 | 6 | 4 | 1 | 13 | 11 | 8 | 8 | 13 | 20 | 20 | 18 |
| -5 | + -6 | + -7 | - -11 | - -12 | - -13 | - -18 | - -19 | - -20 | - -27 | - -43 | - -66 | - -25 | - -26 | ||
| 30 | 50 | 0 | +3 | +6 | -7 | -4 | -1 | -15 | -12 | -9 | -10 | -15 | -24 | -24 | -21 |
| -6 | -6 | -8 | -13 | -13 | -15 | -21 | -21 | -23 | -32 | -50 | -80 | -30 | -30 | ||
| 50 | 80 | +1 | +4 | +7 | -8 | -5 | -2 | -17 | -14 | -11 | -12 | -18 | -29 | -29 | -26 |
| -6 | -7 | -10 | -15 | -16 | -19 | -24 | -25 | -28 | -38 | -60 | -96 | -36 | -37 | ||
| 80 | 120 | 0 | +4 | +7 | -10 | -6 | -3 | -20 | -16 | -13 | -14 | -21 | -33 | -34 | -30 |
| -8 | -9 | -12 | -18 | -19 | -22 | -28 | -29 | -32 | -45 | -70 | -110 | -42 | -43 | ||
| 120 | 180 | 0 -9 | +6 -8 | +10 -13 | -12 -21 | -6 -20 | -2 -25 | -24 -33 | -18 -32 | -14 -37 | -15 -50 | -24 -80 | -38 -126 | -40 -49 | -34 +48 |