Femi Professional Grinder Model 404: Reliability and Efficiency in a Used Machine

If you are looking for a used professional grinder that combines quality, power and practicality, the Femi model 404 is the ideal choice. This model, equipped with a double Ø150 mm grinding wheel and a 370W single-phase motor, is designed to guarantee high performance in professional and artisan environments. The Femi 404 is renowned for its reliability and silent operation thanks to the induction motor, making it a real investment for those who want to work with precision and safety.

What the Femi 404 looks like visually

Femi 404 grinder has a compact and robust design, ideal for placing on a workbench or mounted on a steel base (ART. 303, optional). It features a durable shell, built to last and resist wear and tear. The double abrasive wheels of Ø150 mm are well protected by metal covers, ensuring safety during use. The control panel, with the START-STOP switch equipped with anti-reset function, is easily accessible, increasing practicality of use.

Components and Mechanical Characteristics

• Single Phase Induction Motor:
  • Power: 370W.
  • Silent and vibration-free.
• Double abrasive wheel:
  • Diameter: Ø150 mm.
  • Ideal for roughing and finishing operations.
• Speed: 2800 rpm (RPM).
• START-STOP switch with anti-reset function:
  • It guarantees greater safety in the event of a sudden power cut.
• Predisposition for base ART. 303:
  • Stable and safe mounting, with the possibility of customizing the working height.

Measurements of the Femi 404 Grinder

• Grinding wheel diameter: 150 mm.
• Grinding wheel width: 20 mm (compatible with different types of grinding wheels).
• Overall height: 240mm.
• Net weight: About 7kg, for easy moving and installation.

Usage Procedure

1. Preparation: Place the Femi 404 grinder on a stable surface or on a base ART. 303. Check that the grinding wheels are in good condition and well secured.
2. Ignition: Use the START-STOP switch, which prevents accidental re-ignition.
3. Processing:
   • The left wheel is typically used for roughing, while the right one for finishing.
   • Apply the workpiece against the grinding wheel with moderate pressure to avoid overheating.
4. Switching off: Deactivate the motor using the STOP button and wait for the grinding wheels to completely stop.

Matching accessories

• Steel base ART. 303: For greater stability during use.
• Special grinding wheels: Including discs for working on hard metals or delicate materials such as aluminium.
• Protective masks: To ensure operator safety during use.

Formulas for Optimizing Use

To obtain maximum performance from the Femi 404 , it is useful to calculate the peripheral speed of the grinding wheel:
Vp=π⋅D⋅nV_p = \pi \cdot D \cdot n
$V$ p ​= $\pi$ $\cdot$ $D$ $\cdot$ $n$ Where:

• VpV_p $V$ p ​:
• DD $D$ : Diameter of the grinding wheel (m).
• nn $n$ : Rotation speed (rpm).

With grinding wheels of Ø150 mm and a speed of 2800 RPM (approximately 46.7 rpm), the peripheral speed will be approximately 22 m/s , ideal for precision machining.

Workable Materials

The Femi 404 grinder is designed to work on a wide range of materials:

• Steel.
• Aluminum.
• Brass.
• Composite materials (with specific wheels).

Maintenance of the Femi 404

To guarantee maximum efficiency and durability of the machinery:

• Check the grinding wheels regularly and replace them if worn or damaged.
• Clean the machine body and grinding wheel covers to avoid accumulations of dust and debris.
• Lubricate moving parts (if applicable) following the manufacturer's instructions.
• Check the START-STOP switch to make sure it is working properly.

Safety Regulations

Although the Femi 404 complies with basic safety regulations, it is essential:

• Use protective glasses and resistant gloves.
• Make sure the electrical system is earthed.
• Prepare a work area free from obstacles .

If the machinery does not have a CE mark, it can be retrofitted with a compliant electrical panel and additional protective devices.

How to Evaluate a Good Used Car

A quality used Femi 404 stands out for:

• Condition of the grinding wheels and motor: They must be in good condition and functioning.
• Absence of excessive vibrations: Sign of correct balance.
• Documented maintenance: Prefer machines with verifiable history.

Sectors of Use

• Mechanical workshops.
• Craft workshops.
• Light carpentry sector.
• Advanced DIY workmanship.

Why Buy a Used Femi 404

Buying a used Femi model 404 grinder is a smart choice to obtain a high quality machine at a low cost. Thanks to the robust design and induction motor, this model maintains excellent performance over time, making it a reliable option for any professional or demanding hobbyist.

Don't miss this opportunity: the Femi 404 is your ally for precise and safe processing! Contact us for more information.