High-Performance R Series Helical Gear Motor for Efficient Applications

◆R Series helical geared motors deliver efficiency exceeding 95 percent in single stage configurations, with ratios from 1.4 to over 270 and power coverage from 0.12 to 200 kilowatts. How it works: input rotation transfers through precision ground helical gears arranged coaxially. This inline layout minimizes transmission losses and keeps the package compact for space constrained installations. Foot, flange, and shaft mounted variants accept standard IEC motors directly. GRM extended bearing models handle the high overhung loads common in agitated vessels. Solid shaft and hollow shaft output options cover diverse machine interface requirements. R Series units drive conveyor systems, material handling equipment, pumps, fans, mixers, and packaging lines where continuous operation matters.

▼Key Features

• ★ Modular design

• ★ Wide range of gear ratios

• ★ Rich installation options

• ★ High precision and low noise

• ★ Compact size and easy maintenance

• ★ High transmission efficiency

• ★ Long lifespan

• ★ Able to withstand radial loads

▼Specifications

▼HelmeDrive Gearboxes Exporting-R Series Helical Gear Motor

▼R Series Helical Geared Motors Typical Industrial Applications

�FAQ

Q 1: For a new mixing tank installation, should I choose the R (foot‑mounted) or RF (flange‑mounted) version of HelmeDrive's R series helical gear motor? What impacts the total installation cost?

A:

Both R (foot) and RF (flange) share the same internal helical gearing, so efficiency and torque capacity are identical. The choice affectsinstallation labor,floor space, andfuture flexibility.

· R (foot mounting):The reducer sits on a baseplate or concrete foundation. You need to align the shaft, shim the feet, and drill anchor bolts. This takes more time but allows easy repositioning later. Best when the driven machine has no standard flange.

· RF (B5 flange mounting):The reducer bolts directly onto a machined flange on the tank top or machine frame. No baseplate, no alignment tools. Installation is much faster. Ideal for agitators, mixers, and any equipment that already has a B5 flange.

Example – chemical agitator tank in Thailand:

A chemical plant in Rayong, Thailand, needed to replace four agitator drives. Each tank already had a B5 flange on the top cover. They chose RF flange‑mounted HelmeDrive R series gear motors. Compared to foot‑mounted units that would have required custom baseplates and alignment, the RF version saved significant installation time and labor across the four lines. The project manager said: “The RF version bolted right on. No baseplates, no alignment tools, no extra drilling.”

Send us a photo or drawing of your machine mounting surface. We will help you determine whether R (foot) or RF (flange) gives you the faster and lower‑cost installation.

Q 2: For a continuous mixer application, what key features of HelmeDrive's R series helical gear motor help lower operating costs over the long term?

A:

Continuous mixers run thousands of hours each year. Efficiency and correct sizing directly affect your electricity bill and maintenance schedule. HelmeDrive's R series is designed to address these two cost drivers.

1. High efficiency reduces energy waste

HelmeDrive's R series achieves single‑stage efficiency>95%. Less energy is lost as heat, so more of your electricity goes into turning the mixer. Over a year of continuous operation, this efficiency advantage can lower your power consumption significantly.

2. Radial load support helps protect bearings and avoid oversizing

Mixers often have long shafts and heavy impellers, which create radial loads at the output shaft end. HelmeDrive's R series provides allowable radial load values(������)������ℎ����ℎ����t midpoint, and conversion constants (a, b, c, f) to calculate the true allowable load at your actual load point. Please consult HelmeDrive for the specific values and assistance with the calculation.

What this means for your bottom line:

Example – continuous chemical mixer, Brazil:

A chemical plant in São Paulo, Brazil, installed HelmeDrive R series helical gear motors on a new continuous mixer. They consulted HelmeDrive to verify the radial load capacity for the long impeller overhang. After three years of 24/7 operation, no bearing failures, no overheating. The plant engineer said: “We got the right size with HelmeDrive’s help. It has run without any issues since day one.”

Planning a continuous mixer or agitator? Send us your mixer speed, shaft overhang, and ambient temperature. We will help you select the right R series size.

Q 3: For a large industrial fan (e.g., cooling tower or ventilation fan), how does HelmeDrive's R series helical gear motor help avoid premature bearing failure caused by radial load?

A:

In large fan drives, the most common cause of early gearbox failure isexcessive radial loadon the output shaft. Fan impellers are heavy, and belt drives add tension. If the actual radial load exceeds what the gearbox can handle, bearings fail – sometimes within months.

How HelmeDrive's R series protects your fan investment:

HelmeDrive provides conversion formulas to calculate the allowable radial load at any point X (distance from the shaft shoulder):

· Based on bearing life:F_XL = F_Ra × a / (b + X)

· Based on shaft strength:F_XW = c / (f + X)

The smaller of F_XL and F_XW is the true allowable load at your actual load point.

What you provide to HelmeDrive – and what we do for you:

Simply send us your fan drive parameters. HelmeDrive will perform the radial load calculation and thermal check, then recommend the correct R series model – no guesswork, no premature failures.

Example – cooling tower fan, Vietnam:

A cement plant in Ha Nam Province, Vietnam, experienced two bearing failures in 18 months on a fan drive from another supplier. The fan impeller was mounted directly on the output shaft end. They contacted HelmeDrive with their load data. After applying the radial load conversion, we confirmed the previous gearbox was undersized. They replaced it with a correctly sized HelmeDrive R series helical gear motor. The unit has run for three years without any bearing issues. The maintenance manager said: “HelmeDrive did the calculation for us. Now we know the load is within limits.”

Designing a fan drive with a direct‑mounted impeller or belt drive? Send us the impeller weight, distance from gearbox, belt tension (if any), and operating speed. We will calculate the actual radial load and recommend the right R series size for a long, trouble‑free life.

📬shawn.zhu@helmedrive.com

R Series Helical Gear Motor – Application-Based Selection Guide

◆When selecting a helical gear motor for industrial applications, it is essential to consider not only power and speed but also the actual working conditions, environmental factors, and operational pain points. Below is a practical selection guide based on real-world applications of the HelmeDrive R Series Helical Gearbox—built on real-world data, so you can choose with confidence.

◆The R Series is a highly modular helical gear motor designed for applications where input and output shafts are parallel. It features a compact structure with high-strength cast iron housing, case-hardened and precision-ground gears (surface hardness HRC 58–62), and high efficiency (single-stage ≥ 95%). The series supports multiple mounting positions (M1–M6), various input configurations (motor-mounted or input shaft), and a wide range of reduction ratios, making it suitable for diverse industrial applications such as conveying, mixing, material handling, and packaging.

▼Product Overview

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

▼Understanding HelmeDrive R Series Model Designation

Example: R59-4P-15.93-M1

▼Application Areas

Based on industry-standard load classifications, the R Series is suitable for a wide range of industrial applications:

1. Conveying Systems Applications

Common Pain Points:

n High radial loads from pulleys and sprockets

n Continuous 24/7 operation in dusty environments

n Need for reliable sealing against material spillage

n Frequent start-stop in automated logistics

Selection Recommendations:

2. Packaging & Food Processing Applications

Common Pain Points:

n Hygienic requirements with frequent washdowns

n Need for smooth, accurate positioning

n Compact installation in crowded production lines

n Quiet operation for indoor environments

Selection Recommendations:

3. Cranes & Hoisting Applications

Common Pain Points:

n High starting torque under load

n Safety requirements for load holding

n Shock loads during acceleration/braking

n Need for reliable backstop to prevent reverse rotation

Selection Recommendations:

★Technical Specifications Reference

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

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

2. Reduction Ratios (Typical)

Reduction ratios vary by frame size and motor power. Common ratios include 3.48, 4.26, 5.77, 7.20, 9.00, 12.1, 14.8, 18.2, 20.1, 24.6, 30.7, 33.3, 38.4, 41.5, 51.9, 64.8, and higher. Please contact HelmeDrive engineering for exact ratios.

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, use FxL = FRa × a / (b + X) for bearing life, and FxW = c / (f + X) for shaft strength. FRa is the permissible radial load at the shaft midpoint.

★What to Know Before You Buy

▸Select the correct mounting position– R Series supports multiple mounting positions (M1–M6). The default is M1 (foot-mounted, motor horizontal, unit base at bottom). For other orientations, ensure proper lubrication as oil levels may need adjustment.

▸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 (where fr = 1 for chain sprockets, 1.25 for gears, 1.5 for V-belts, 2.5 for flat belts). 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.

▸Consider axial loads– 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.

▸Lubrication is factory-filled– R 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. Use the recommended lubricant based on ambient temperature.

▸Input shaft loads require consultation– For applications where the input shaft is subjected to axial or radial loads (e.g., belt-driven input), consult HelmeDrive for permissible values.

▸Motor terminal box position– If not specified, the terminal box is supplied at the 0° position (as shown in mounting arrangement diagrams). For other positions, specify when ordering.

▸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