💡 Recomendación para taller: Imprime en papel Carta o A4 y plastifícalo o pégalo en la tapa interior de tu caja de herramientas o en el tablero de trabajo.
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Tabla Maestra de Brocas y Fracciones
Equivalencia exacta de fracciones estándar de pulgada (1/64" a 1") a milímetros y decimales. 1 pulgada = 25.4 mm (BIPM / ISO 286).
| FRACCIÓN | DECIMAL (IN) | MM EXACTOS |
|---|---|---|
| 1/64" | 0.0156 | 0.397 mm |
| 1/32" | 0.0313 | 0.794 mm |
| 3/64" | 0.0469 | 1.191 mm |
| 1/16" | 0.0625 | 1.587 mm |
| 5/64" | 0.0781 | 1.984 mm |
| 3/32" | 0.0938 | 2.381 mm |
| 7/64" | 0.1094 | 2.778 mm |
| 1/8" | 0.1250 | 3.175 mm |
| 9/64" | 0.1406 | 3.572 mm |
| 5/32" | 0.1563 | 3.969 mm |
| 11/64" | 0.1719 | 4.366 mm |
| 3/16" | 0.1875 | 4.762 mm |
| 13/64" | 0.2031 | 5.159 mm |
| 7/32" | 0.2188 | 5.556 mm |
| 15/64" | 0.2344 | 5.953 mm |
| 1/4" | 0.2500 | 6.350 mm |
| 17/64" | 0.2656 | 6.747 mm |
| 9/32" | 0.2813 | 7.144 mm |
| 19/64" | 0.2969 | 7.541 mm |
| 5/16" | 0.3125 | 7.938 mm |
| 21/64" | 0.3281 | 8.334 mm |
| 11/32" | 0.3438 | 8.731 mm |
| 23/64" | 0.3594 | 9.128 mm |
| 3/8" | 0.3750 | 9.525 mm |
| 25/64" | 0.3906 | 9.922 mm |
| 13/32" | 0.4063 | 10.319 mm |
| 27/64" | 0.4219 | 10.716 mm |
| 7/16" | 0.4375 | 11.112 mm |
| 29/64" | 0.4531 | 11.509 mm |
| 15/32" | 0.4688 | 11.906 mm |
| 31/64" | 0.4844 | 12.303 mm |
| 1/2" | 0.5000 | 12.700 mm |
| FRACCIÓN | DECIMAL (IN) | MM EXACTOS |
|---|---|---|
| 33/64" | 0.5156 | 13.097 mm |
| 17/32" | 0.5313 | 13.494 mm |
| 35/64" | 0.5469 | 13.891 mm |
| 9/16" | 0.5625 | 14.287 mm |
| 37/64" | 0.5781 | 14.684 mm |
| 19/32" | 0.5938 | 15.081 mm |
| 39/64" | 0.6094 | 15.478 mm |
| 5/8" | 0.6250 | 15.875 mm |
| 41/64" | 0.6406 | 16.272 mm |
| 21/32" | 0.6563 | 16.669 mm |
| 43/64" | 0.6719 | 17.066 mm |
| 11/16" | 0.6875 | 17.462 mm |
| 45/64" | 0.7031 | 17.859 mm |
| 23/32" | 0.7188 | 18.256 mm |
| 47/64" | 0.7344 | 18.653 mm |
| 3/4" | 0.7500 | 19.050 mm |
| 49/64" | 0.7656 | 19.447 mm |
| 25/32" | 0.7813 | 19.844 mm |
| 51/64" | 0.7969 | 20.241 mm |
| 13/16" | 0.8125 | 20.637 mm |
| 53/64" | 0.8281 | 21.034 mm |
| 27/32" | 0.8438 | 21.431 mm |
| 55/64" | 0.8594 | 21.828 mm |
| 7/8" | 0.8750 | 22.225 mm |
| 57/64" | 0.8906 | 22.622 mm |
| 29/32" | 0.9063 | 23.019 mm |
| 59/64" | 0.9219 | 23.416 mm |
| 15/16" | 0.9375 | 23.813 mm |
| 61/64" | 0.9531 | 24.209 mm |
| 31/32" | 0.9688 | 24.606 mm |
| 63/64" | 0.9844 | 25.003 mm |
| 1" | 1.0000 | 25.400 mm |
| ROSCA MÉTRICA | PASO ESTÁNDAR | BROCA PREVIA (MM) | FRACCIÓN CERCANA |
|---|---|---|---|
| M3 | 0.50 mm | 2.50 mm | 3/32" (2.38 mm) |
| M4 | 0.70 mm | 3.30 mm | 1/8" (3.18 mm) |
| M5 | 0.80 mm | 4.20 mm | 11/64" (4.37 mm) |
| M6 | 1.00 mm | 5.00 mm | 13/64" (5.16 mm) |
| M8 | 1.25 mm | 6.80 mm | 17/64" (6.75 mm) |
| M10 | 1.50 mm | 8.50 mm | 21/64" (8.33 mm) |
| M12 | 1.75 mm | 10.20 mm | 13/32" (10.32 mm) |
FÓRMULA RÁPIDA DE ROSCADO:
Ø Broca = Diámetro Nominal - Paso
Ejemplo para M6 (paso 1.0 mm): 6 - 1.0 = 5.0 mm de broca.