Efficient and Reliable S Series Helical Gear Motor for Industrial Applications

◆S Series helical-worm geared motors combine a helical first stage with a worm final stage, delivering right-angle output with self-locking capability. Ratios range from 3.0 to over 200 and motor powers span 0.12 to 15 kilowatts. Dynamic efficiency varies with ratio, reaching up to 88 percent under favorable conditions. How it works: input rotation passes through a precision helical gear set before driving a bronze worm wheel. This two-stage arrangement provides a compact 90-degree transmission path while the worm geometry resists backdriving when static. Foot, flange, shaft, and shrink disc mounting configurations accept standard IEC motors. Hollow shaft and solid shaft outputs suit diverse machine interfaces. S Series units drive mixers, conveyors, packaging machinery, food processing equipment, and gate actuators where fail-safe braking through self-locking matters.

S Series Helical-Worm Gear Motor – Application-Based Selection Guide

◆When selecting a helical-worm gear motor for industrial applications, it is essential to consider not only power and speed but also the unique demands of each sector—compact installation spaces, frequent start-stop cycles, self-locking requirements, and diverse environmental conditions. Below is a practical selection guide based on real-world applications of the HelmeDrive S Series Helical-Worm Gear Motor—built on real-world data, so you can choose with confidence.

◆The S Series is a helical-worm gear motor designed for applications where output shafts are perpendicular to input shafts. It combines a helical gear input stage with a worm gear output stage, providing smooth operation and high efficiency in a compact right-angle configuration. The series features high-strength cast iron housing, factory-filled lubrication, and multiple mounting options. Key features include compact structure, smooth and quiet operation, good self-locking capability (especially at higher ratios), and versatile mounting configurations.

▼Product Overview

Note:For detailed power, torque, and ratio tables—including values for specific sizes and operating conditions—please consult HelmeDrive engineering.

▼Understanding HelmeDrive S Series Model Designation

Example: S79-15.93-M1

▼Application Areas

Based on industry-standard load classifications, the S Series is suitable for a wide range of industrial applications where right-angle drives are required:

1. Conveying Systems Applications

Common Pain Points:

n High radial loads from pulleys and sprockets

n Need for self-locking on inclined conveyors

n Continuous operation in dusty environments

n Space constraints requiring compact right-angle drives

Selection Recommendations:

2. Hoisting & Lifting Applications

Common Pain Points:

n High starting torque under load

n Safety requirements for load holding

n Need for self-locking to prevent reverse rotation

n Compact installation in machinery houses

Selection Recommendations:

3. Packaging & Food Processing Applications

Common Pain Points:

n Frequent start-stop cycles in automated lines

n Need for smooth, accurate positioning

n Compact installation in crowded production lines

n Washdown requirements in food processing

Selection Recommendations:

4. Mixing & Agitation Applications

Common Pain Points:

n Variable torque due to viscosity changes

n Smooth, vibration-free operation required

n Vertical mounting with motor above tank

n Quiet operation for indoor environments

Selection Recommendations:

★Technical Specifications Reference

 For complete power, torque, and ratio tables—including values for specific sizes and operating conditions—please consult HelmeDrive engineering.

1. Frame Sizes and Corresponding Motor Power Ranges (Typical)

Note: Power ranges are indicative; specific values depend on ratio and operating conditions. Consult selection tables for exact ratings.

2. Reduction Ratios (Typical)

Note: Actual ratios vary by motor power; consult selection tables for precise values.

3. Efficiency

4. Service Factor Selection

Total service factorfA = fAh × fAc × fAt × fAn

Note: For detailed load classification values, consult HelmeDrive.

5. Gear Unit Constants for Radial Load Conversion

Note: For radial load calculation, useFxL = FRa × a / (b + X)for bearing life, andFxW = c / (f + X)for shaft strength. FRa is the permissible radial load at the shaft midpoint from selection tables.

6. Permissible Radial Load (FRa) at Shaft Midpoint

Note: Values are typical; refer to selection tables for exact FRa at specific ratios and motor powers.

★What to Know Before You Buy

▸Understand self-locking characteristics– HelmeDrive S Series offers good self-locking at higher reduction ratios (typically ≥ 30:1). However, self-locking depends on operating conditions, vibration, and load characteristics. For critical safety applications (hoists, lifts), always use additional braking devices—do not rely solely on self-locking.

▸Select the correct mounting position– The S Series supports multiple mounting positions (M1–M6). The default is M1 (foot-mounted, motor horizontal). For other orientations, ensure proper lubrication as oil levels may need adjustment. Vertical mounting (M2, M4) requires special attention to ensure upper bearings are lubricated.

▸Account for service factors– Calculate fA = fAh × fAc × fAt × fAn based on your application’s load type, daily operating hours, start/stop frequency, ambient temperature, and output speed. Ensure the selected gearbox has fB ≥ fA.

▸Calculate radial loads accurately– For overhung loads (sprockets, pulleys, gears), calculate the radial load using Fr = 2 × Mr × fr / d. If the load is not applied at the shaft midpoint, use the conversion formulas with gear unit constants to determine the permissible load at the actual load point.

▸Check axial load capacity– Axial loads up to 5% of the permissible radial load are allowed when no radial load is present. For combined radial and axial loads, or for significant axial loads, consult HelmeDrive.

▸Consider the operating environment– For dusty environments, request enhanced sealing. For outdoor installations, ensure proper protection against moisture. For high ambient temperatures, apply the temperature factor fAt and consider forced lubrication if thermal capacity is a concern.

▸Lubrication is factory-filled– S Series gear units are delivered with oil. The exact oil quantity depends on the mounting position; refer to the oil level mark for proper filling. For vertical mounting, consult HelmeDrive to ensure correct lubrication.

▸Let HelmeDrive help with selection– With multiple frame sizes, ratios, and mounting options, proper sizing requires accurate load data. Send your application parameters—load characteristics, required power/speed, duty cycle, mounting position, and environmental conditions—to HelmeDrive for precise gearbox sizing.

By matching your selection to your actual working conditions and operational challenges, you ensure longer equipment life, lower maintenance costs, and higher system reliability. HelmeDrive is committed to providing robust, efficient solutions tailored to your industrial needs.

📬shawn.zhu@helmedrive.com