Flender gear reducers are designed to meet various industrial standards, offering flexible and reliable solutions. However, selecting the right model requires careful consideration of multiple factors. Below are key guidelines to help you choose the most suitable Flender reducer for your application.

1. Determine Mechanical Power & Torque Requirements

• Input/Output Power (kW/HP): Match the reducer’s rated power to your motor’s output.

• Torque (Nm): Ensure the reducer can handle the required torque without overloading.

• Service Factor (SF): Account for variable loads (e.g., shock loads or frequent starts/stops).

Formula for Selection:

Required Reducer Power≥Motor Power×Service FactorRequired Reducer Powe ≥ Motor Powe × Service Factor

2. Consider Speed & Ratio Requirements

• Input Speed (RPM): Align with the motor’s operating speed.

• Output Speed (RPM): Define based on process needs.

• Gear Ratio: Calculate using:

  Gear Ratio=Input SpeedOutput SpeedGear Ratio=Output SpeedInput Speed

3. Environmental & Operational Conditions

• Ambient Temperature: High temperatures may require special cooling (fan, water jacket).

• Dust/Moisture Exposure: Choose IP65/IP66 protection for harsh environments.

• Mounting Position: Horizontal, vertical, or flange-mounted options.

4. Thermal Balance Verification

Flender reducers must undergo thermal equilibrium checks to prevent overheating:

• Natural Cooling: Suitable for standard applications.

• Forced Cooling (Fans/Water Cooling): Needed for high-duty cycles or hot environments.

Checklist:
✔ Calculate heat dissipation capacity.
✔ Ensure ambient temperature stays within limits.
✔ Monitor oil temperature (ideally <90°C).

5. Mechanical Compatibility

• Shaft Configuration: Parallel shaft, helical-bevel, or planetary design.

• Backlash Requirements: Precision applications (e.g., robotics) need low backlash.

• Mounting Style: Foot-mounted, flange-mounted, or shaft-mounted.

6. Maintenance & Lifespan Factors

• Lubrication Type: Oil bath, grease, or circulating systems.

• Service Intervals: Align with operational hours (e.g., oil changes every 5,000 hours).

• Ease of Inspection: Choose designs with accessible seals and breathers.

7. Industry-Specific Requirements

• Mining/Cement: Heavy-duty models with high shock resistance.

• Food & Pharma: Stainless steel or hygienic design.

• Marine: Corrosion-resistant coatings.

Final Recommendation

For optimal selection:

1. Consult Flender’s Technical Manuals for detailed specs.

2. Use Flender’s Selection Software (e.g., Flender Select) for automated matching.

3. Contact Flender Engineers for custom solutions (e.g., explosion-proof or ATEX compliance).

Pro Tip: Always oversize slightly for future scalability. A reducer operating at 80–90% capacity lasts longer than one running at 100%.