Overview

This document details the specifications, design data, and selection guidelines for Tandler's ServoFoxx® planetary gearboxes and right-angle drive solutions. It targets industrial applications requiring precision, dynamic servo motor compatibility, and flexible output configurations.

1. Service Factors and Shock Load Classification

A shock load factor c is introduced to account for load severity and daily operating hours when selecting gearboxes. Shock loads are categorized into three classes:

• Class I (Almost shock-free): e.g., electric generators, fans.
• Class II (Moderate shocks): e.g., heavy elevators, crane slewing gears.
• Class III (Heavy shocks): e.g., punching machines, rolling mills.

Tables provide c values based on prime mover type, shock class, and operating hours (0.5 to 24 hours).

2. Determination of Design Data

• Power (P): in kW (1 kW = 1.36 hp).
• Torque (M): in Nm (1 Nm = 0.102 kpm).
• Speed (n): in rpm (1 rpm = 0.1047 rad/s).
• Gear Ratio (i): input speed/output speed.
• Mass Moment of Inertia (J): in kg·m².
• Permissible Radial Load (F): max radial force on output shaft in Newtons.

Output torque is calculated by M = (9550 × P) / n.

3. Gear Ratio Determination

Gear ratio i is the ratio of input to output shaft speeds, regardless of speed increase or reduction. Manufacturer-specified ratios must be strictly followed when ordering.

4. Gearbox Selection Criteria

Selection must consider motor nominal torque, shock factor c, and operating conditions to ensure maximum recurring torque does not exceed nominal torque. Permissible input torque is calculated as:

M1 (permissible) = M2 nominal × c × i

5. ServoFoxx® Planetary Gearboxes

Designed for dynamic servo motors, these low-backlash planetary gearboxes come in two or three stages, achieving gear ratios up to 100:1 or 1000:1 with minimal size increase. Available with input shafts or drive pins.

Technical tables specify nominal and max output torques, inertia, radial loads, and typical gear ratios for models such as PL2 FS 00, PL2 FS 01, etc.

6. Right-Angle Drives (ServoFoxx PSK FS2®)

These combine planetary and spiral bevel gears to provide high-ratio, precision right-angle drives with gear ratios from 8:1 to 60:1. Output options include hollow shafts and multiple outputs. Detailed torque, inertia, radial load, and dimensional data are provided.

7. Combined Spiral Bevel and Planetary Gearboxes (ServoFoxx SKP2 FS®)

This range integrates spiral bevel and planetary gearboxes for precision right-angle drives with ratios from 2:1 to 60:1, allowing full torque utilization on the output side. Available with input shafts or drive pins, with detailed technical data included.

8. Dimensional and Assembly Information

Comprehensive dimensional data covers shaft diameters, flange sizes, mounting holes, and permissible radial loads. Assembly position is flexible and unrestricted. Backlash values are specified with standard (6’ or 8’) and minimum (3’ or 4’) options.

Critical Information and Recommendations

• Always factor in shock load c and operating hours for durability.
• Verify gear ratios with the manufacturer before ordering.
• Ensure maximum recurring torque is below gearbox nominal torque.
• ServoFoxx gearboxes provide minimal backlash suitable for dynamic servo applications.
• Right-angle and combined gearboxes offer flexible design options.
• Assembly position is unrestricted, simplifying installation.
• Refer to spiral bevel gear brochures for additional options.

Additional Product Specifications and Assembly Guidelines

The document also covers ServoFoxx gearbox models FS 00, FS2 01, FS A1, FS B1, FS C1 with gear ratios from 2:1 to 6:1 and torque ratings from 20 Nm up to 365 Nm nominal. Moment of inertia and permissible radial loads are specified for dynamic performance.

Assembly instructions include bellow-type coupling compression (1 mm after assembly), screw torque specifications (4.5 Nm for M4 to 130 Nm for M12), and shaft orientation requirements to optimize lubrication and installation.

Lubrication and Service Conditions

All gearboxes come with lifetime lubrication suitable for normal conditions up to 90°C. Lubrication is customized based on application and shaft orientation.

Performance and Application Notes

• Supports various motor types and multiple output configurations (up to five outputs).
• Backlash options: standard 6 arc minutes and reduced 3 arc minutes for precision.
• Service factors and environmental conditions (dust, humidity, continuous operation) are considered in selection.

Ordering and Customer Information

• Customers must provide detailed application data including dimensions, shaft orientations, operating conditions, and quantities.
• Contact details for Tandler Zahnrad- und Getriebefabrik GmbH & Co. KG are provided for support.

Summary Table of Critical Parameters

Conclusion

The ServoFoxx gearbox series provides versatile, precision right-angle gear solutions optimized for servo motor integration. Detailed technical data, assembly instructions, and lubrication guidelines ensure reliable performance across diverse industrial applications. Accurate specification of operating conditions and shaft orientations is critical for optimal gearbox configuration and longevity.