Alphacool 40mm Fan Grill, black, model 10335 — protective metal fan guard for 40 mm fans

Alphacool 40mm Fan Grill in black is a metal protective guard designed to fit standard 40 mm axial fans. The grill covers the fan opening to reduce the risk of foreign objects or fingers contacting the rotor, while maintaining airflow for cooling tasks in PC cases, small enclosures and custom cooling assemblies. Its compact design and black finish make it suitable for a variety of installations where space is limited and safety or blade protection is required.

Advantages

The metal construction provides durable protection against debris and mechanical contact without significantly obstructing airflow. The slim profile and standard mounting hole compatibility allow quick installation on most 40 mm fans. The black coating offers a neutral appearance that integrates with common system interiors and prevents corrosion in typical indoor environments.

Suitable for

• Protecting 40 mm axial fans in PC cases and small form-factor systems
• Use in compact enclosures, external cooling modules and fan-assisted electronics
• Applications where finger or cable protection is required around spinning fan blades

When it may not be suitable

This fan grill is intended for standard 40 mm axial fans; it will not fit larger or smaller fan sizes and should not be used where a different mounting pattern is present. It is a passive protective accessory and does not affect fan speed, bearing type or electrical characteristics.

Key specifications

• Type: protective metal fan grill for axial fans
• Intended fan size: 40 mm
• Finish: black coated metal
• Compatibility: designed for standard 40 mm mounting holes
• Function: blade protection, debris prevention, user safety

How to use

Align the grill with the fan’s mounting holes and secure it using the same screws used for the fan or compatible fasteners. Ensure the grill is flush against the fan frame to avoid vibration or rubbing on the blades. Verify that the airflow direction and clearance are not obstructed after installation and that the fan operates freely at intended speeds.

What to consider before purchase

• Confirm your fan has standard 40 mm mounting holes and that the grill’s screw hole positions match.
• Check available clearance inside the enclosure to accommodate the grill without interfering with nearby components or cables.
• Consider whether you need additional isolation (rubber grommets or washers) to reduce vibration transmission.

Usage recommendations

For best results, install the grill with appropriate fasteners and, if needed, use small rubber washers to dampen vibration. Periodically inspect the grill for accumulated dust and clean with compressed air or a soft brush to preserve airflow and protection.