Michelin MCX 300 858 - Belt-driven Electric Air Compressor - 7.5 Hp Motor - 270 L

The Michelin MCX air compressor is regarded as the best choice among demanding hobbyists and professionals looking for a reliable, durable belt-driven equipment.

Powered by a 7.5 Hp motor, this air compressor features a compressed air suction capacity of 830 L/min. It is capable of reaching a maximum pressure of 10 bar.

The air compressor comes with an electromechanical pressure switch, pressure reducer with pressure gauge and universal quick release valve.

It features a large-sized compressed air storage tank of 270 L.

The air compressor weighs 150 Kg and can be easily transported thanks to its wheels and the upper handle.

Air intake flow: 830 L/min

Pumping unit type: belt-driven

Pressure: 10 bar

Electric motor power: 7.5 Hp

Tank: 270 L

Overall dimensions:
- Width: 1550 mm
- Height: 1200mm
- Depth (or thickness): 600 mm

Weight: 150 kg

Power supply: 400V

Power: 7.5 Hp
The induction motor is characterised by a very long service life and low maintenance requirements.

In fact, this motor is brushless, the brushes being the main component subject to wear in electric motors. The absence of this component grants high durability to the motor.

It is a top product in terms of reliability, low noise, durability, energy efficiency and maintenance.

Air intake flow: 830 L/min
Cylinder head type: twin-cylinder with cast iron cylinders
Suction type: single stage
Lubrication: oil
No. of revolutions: 1280 rpm

The degree of professionalism and more generally the life of the air compressor is largely determined by the number of revolutions per minute of the cylinder head.

The lower the rpm, the longer the life of the air compressor. The reduction ratio of the number of revolutions is obtained by the pulleys of different diameter that are fitted to the motor and to the cylinder head respectively.

Focus on the side cooling manifold

Focus on the oil level indicator

• Increased durability over time: the bolted mechanical joint helps prevent micro-cracks and structural failures that can affect welded joints when exposed to vibration or high pressures.
• Simplified maintenance: the connection can be disassembled swiftly, facilitating inspection, cleaning and replacement of parts.
• Improved operational stability: the bolted connection ensures a stronger and more durable coupling, particularly beneficial for compressors subjected to heavy-duty use.

The MCX 300 858 air compressor features easy and user-friendly controls, which are divided into:

Three-phase power switch

Output air pressure gauge

Tank air pressure gauge

Air compressor double female outlet fitting

Pressure adjusting knob

These Michelin air compressors feature a belt drive.

The use of the belt, combined with an induction motor, contributes to the durability of this air compressor, drastically reducing the number of revolutions of the cylinder head, increasing its life and reducing wear.

The grid protection serves to prevent the drive belt and the transmission from being damaged by external objects that might hit it during operation. It also allows the status of the drive belt to be continuously checked.

Three-phase cable

Ergonomic handle

Large wheels in sturdy plastic
Pivoting front wheel

Condensate drain valve

Recommendations for use

To ensure maximum durability and efficiency of the machine, the following instructions must be strictly observed. Failure to do so constitutes improper use, with a serious risk of damage to the product (such damage is not covered by the warranty).

• Tank maintenance and condensate drainage: Moisture contained in the intake air accumulates as condensate at the bottom of the tank, due to the thermal processes generated during compression. Drain the condensate after each use by operating the lower drain valve, turning it carefully to avoid sudden discharges of compressed air and liquid. Failure to carry out this maintenance task may lead to internal corrosion of the tank. Furthermore, condensate accumulation reduces the effective air volume, causing abnormal motor restart cycles and the transfer of impurities to connected tools, with the resulting risk of premature damage to the entire system.
• Suitability of extension leads: Do not use unsuitable extension leads. Given the  high motor power, it is essential to ensure a constant power supply. Undersized cabling causes voltage drops that prevent the motor from reaching the correct speed, leading to abnormal overheating and permanent damage to electrical components. Use only cables with a minimum cross-section of 2.5 mm². This cross-section is necessary to handle the high current absorption, especially during start-up.

Unwind the extension lead completely before use. Never use the machine if the power cable is partially coiled or bunched up. Heat build-up due to induction can melt the cable and cause serious electrical damage to the motor or a fire hazard.

• Operating position:  The air compressor must only be installed in environments free from humidity, preferably in dry locations that are fully protected from weather exposure and potential water splashes. Adequate ventilation must be ensured by maintaining a clearance of at least 50 cm between the machine and any wall or obstacle, in order to allow for proper air circulation and effective heat dissipation. The installation area must also guarantee a high level of air cleanliness and be free from dust, fumes, chemical vapours, or flammable gases. Failure to comply with these requirements exposes the product to the following risks:

1. Critical overheating: insufficient ventilation or installation in confined spaces impairs the cooling of the motor and pump assembly, resulting in reduced service life.
2. Safety risks: the presence of volatile or flammable substances may compromise the structural integrity of the machine or the safety of the operator.

• Obstruction of cooling and ventilation systems:  During machine operation, the air compressor must not be covered with sheets, boxes or makeshift casings, as such barriers prevent the air flow required for cooling the internal components. Blocking the ventilation slots causes a rapid rise in operating temperature, with the consequent risk of irreversible damage to the motor and the seals of the pumping unit. If protective covers are used during periods of inactivity, these must be completely removed before any start-up attempt to ensure the full efficiency of the heat dissipation system, thus preventing critical overheating.
• Power supply and connections suitability: The air compressor must be connected exclusively to an electrical socket rated for the motor’s nominal power. Avoid using unsuitable sockets or connections located too far from the main electrical system. Failure to comply with these requirements exposes the machine to insufficient voltage conditions, seriously compromising the start-up phase, causing start-up difficulties, abnormal stresses and the sudden tripping of protective devices (circuit breakers or residual-current devices).
• Shutdown procedure and static pressure management: It is recommended not to leave the tank pressurised during periods of inactivity. After switching off (OFF position), the residual pressure must be released and the drain valve opened, leaving the tank empty in order to promote the evaporation of internal moisture. Maintaining constant pressure, in fact, promotes condensation build-up and accelerates the deterioration of pneumatic components, such as diaphragms and valves, drastically reducing the overall reliability of the system and its operational life.
• Checking the oil level: Before each use, check the oil level in the pumping unit. The level must fall within the range indicated by the oil level indicator or the dipstick, if fitted. Do not operate the air compressor if the oil level is too low, too high or if the oil is contaminated. An insufficient oil level can cause overheating, accelerated wear, seizure of the pumping unit and damage not covered by the warranty. An excessive oil level can cause leaks, oil leakage and oil carry-over into the compressed air circuit.

Operating position: Use the air compressor exclusively in a vertical position, on a flat and stable surface. Use on sloping surfaces may compromise the correct lubrication of the pumping unit.