1. Introducción
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your Chicago Pneumatic CP785 3/8-inch Air Power Drill. Please read this manual thoroughly before using the tool to ensure proper handling and to prevent injury or damage.

Figure 1: Chicago Pneumatic CP785 Air Power Drill with Keyed Chuck.
2. Información de seguridad
Observe siempre las precauciones generales de seguridad al utilizar herramientas eléctricas. El incumplimiento de estas instrucciones puede provocar lesiones graves.
- Protección ocular: Utilice siempre gafas o antiparras de seguridad aprobadas por ANSI.
- Protección auditiva: Use ear protection, especially during prolonged operation.
- Protección de mano: Use guantes adecuados para proteger las manos.
- Suministro de aire: Ensure the air supply is clean, dry, and regulated to the specified pressure (90 psi).
- Inspección de manguera: Regularly inspect air hoses for damage or leaks.
- Pieza de trabajo segura: Always secure the material being drilled to prevent movement.
- Ventilación adecuada: Operar en un área bien ventilada.
- Desconectar el aire: Desconecte el suministro de aire antes de cambiar accesorios, realizar mantenimiento o cuando la herramienta no esté en uso.
- Evite la ropa holgada: No use ropa suelta ni joyas que puedan quedar atrapadas en las piezas móviles.
3. Características del producto
The Chicago Pneumatic CP785 Air Power Drill is designed for durability and smooth operation, making it suitable for various maintenance tasks.
- Powerful, energy-efficient air motor resists stalls.
- Triple idler planetary gearing ensures smooth operation and extended tool life.
- Handle exhaust reduces noise and directs air away from the work area.
- Ideal 3/8-inch multi-purpose drill.
- Pistol grip design for comfortable handling.
- Carcasa de aluminio duradera.

Figure 2: Key features of the CP785 including its pistol grip, powerful motor, and handle exhaust.
4. Configuración inicial
4.1 Conexión del suministro de aire
- Ensure your air compressor is capable of providing the required air pressure (90 psi) and CFM (16.5 CFM at full load).
- Connect a 3/8-inch minimum diameter air hose to the 1/4-inch NPT air inlet on the drill.
- Install an in-line air filter/lubricator as close to the tool as possible to ensure clean, lubricated air.
- Set the air pressure regulator to 90 psi (6.2 bar) when the tool is running.
4.2 Chuck Operation (Keyed Chuck)
The CP785 features a keyed chuck for securing drill bits.
- Insertar broca: Open the chuck jaws by turning the chuck collar counter-clockwise. Insert the drill bit into the chuck, ensuring it is centered and seated firmly.
- Apretar el mandril: Use the chuck key to tighten the chuck jaws securely around the drill bit. Tighten in all three keyholes for maximum grip and to prevent slippage.
- Remove Bit: Loosen the chuck jaws using the chuck key and remove the drill bit.

Figura 3: Primer plano view of the CP785's keyed chuck mechanism.
5. Instrucciones de funcionamiento
5.1 Starting the Drill
The CP785 features a trigger throttle for variable speed control.
- Ensure the drill bit is securely installed and the air supply is connected and regulated.
- Position the drill bit on the workpiece.
- Gently press the trigger to start the drill. The speed is variable depending on trigger pressure.
- Apply steady, even pressure to the drill. Avoid excessive force, which can cause stalling or damage to the bit or workpiece.
- Suelte el gatillo para detener el taladro.
5.2 Técnica de perforación
- Always start drilling at a slow speed to prevent the bit from wandering.
- Increase speed as the bit penetrates the material.
- Maintain a firm grip on the drill with both hands if necessary.
- Clear chips regularly, especially when drilling deep holes.
- For metal drilling, use appropriate cutting fluid to extend bit life and improve cut quality.
6. Mantenimiento
Regular maintenance ensures optimal performance and extends the life of your air drill.
6.1 Lubricación
The CP785 requires daily lubrication to maintain its internal components.
- Before each use, or at the beginning of each workday, add 5-10 drops of high-quality air tool oil into the air inlet.
- Run the tool for a few seconds to distribute the oil.
- If an in-line lubricator is used, ensure it is filled with air tool oil and adjusted to dispense 1-2 drops per minute.
6.2 Limpieza
- Keep the exterior of the tool clean and free of debris.
- Limpie periódicamente las mordazas del mandril para garantizar un agarre adecuado de las brocas.
- Do not use harsh solvents that could damage the aluminum housing or internal seals.
6.3 Almacenamiento
When not in use, store the drill in a clean, dry environment, disconnected from the air supply.
7. Solución de problemas
Consulte la siguiente tabla para conocer los problemas más comunes y sus posibles soluciones.
| Problema | Posible causa | Solución |
|---|---|---|
| Tool does not operate or operates slowly | Baja presión de aire Insufficient air supply (CFM) Falta de lubricación Entrada de aire obstruida Manguera de aire dañada | Check regulator setting (90 psi) Ensure compressor meets CFM requirements Add air tool oil Limpiar el filtro de entrada de aire Inspect and replace hose if damaged |
| Vibración o ruido excesivo | Cojinetes desgastados Componentes sueltos broca desequilibrada | Póngase en contacto con el centro de servicio autorizado Compruebe si hay tornillos sueltos y apriételos. Ensure drill bit is straight and properly installed |
| La broca se resbala en el mandril | El mandril no está lo suficientemente apretado Worn chuck jaws Oily drill bit shank | Tighten chuck in all three keyholes Replace chuck Clean drill bit shank before insertion |
| Fugas de aire | Accesorios flojos Juntas tóricas/sellos dañados | Apriete todas las conexiones Replace O-rings/seals |
8. Especificaciones técnicas
Detailed specifications for the Chicago Pneumatic CP785 Air Power Drill.
| Especificación | Valor |
|---|---|
| Modelo | CP785 |
| Tamaño de Chuck | 3/8 de pulgada (10 mm) |
| Tipo de mandril | Enchavetado |
| Fuente de poder | Accionado por aire |
| Velocidad máxima de rotación | 2400 RPM |
| Caballo de fuerza | 0.5 CV |
| Par de parada | 3.1 ft. lbf (4.2 NM) |
| Tamaño de la entrada de aire | 1/4 pulgada NPT |
| Average CFM @ 15 Sec Run Time | 4.10 |
| CFM a plena carga | 16.5 |
| Presión requerida | 90 psi (6.2 bares) |
| Tamaño mínimo de la manguera | 3/8 de pulgada |
| Material del mango | Aluminio |
| Material de la carcasa | Aluminio |
| Peso del artículo | 2.25 libras (1.02 kg) |
| Dimensiones del producto | 7.01 pulgadas (largo) |
| Nivel de sonido | 101 dB |
| Código Postal | 015451026226 |
9. Garantía y soporte
9.1 Información de garantía
The Chicago Pneumatic CP785 Air Power Drill comes with a 2-year limited warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For full warranty terms and conditions, refer to the documentation included with your product or visit the official Chicago Pneumatic websitio.
9.2 Atención al cliente
For technical assistance, parts, or service, please contact Chicago Pneumatic customer support. You can find contact information on the official Chicago Pneumatic website or through your authorized dealer. When contacting support, please have your model number (CP785) and serial number (if applicable) ready.
10. Producto adicional Views

Figura 4: Lado view of the CP785 air drill, highlighting its compact design.

Figura 5: Angulado view of the CP785, showing the air inlet and trigger.





