Reliable B Series Helical Gear Speed Reducer for Enhanced Performance

◆With its dependable design and precision engineering, this gear reducer ensures consistent and reliable operation. It delivers optimal power transmission, resulting in improved performance and efficiency. Built for durability, it withstands demanding conditions, minimizing downtime and maximizing productivity. The B Series Helical Gear Speed Reducer is a reliable solution that enhances overall performance in industrial processes, making it an ideal choice for industries seeking enhanced productivity and performance.

▼Key Features

• ★ Stronger load-bearing capacity

• ★ More optimized configuration

• ★ Leading-edge technology

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▼Specifications

▼HelmeDrive Gearboxes Exporting-B Series Helical Gear Speed Reducer

▼Industry application

�Frequently Asked Questions

Q 1: Why would I choose a right-angle gearbox over a parallel shaft for my crane or conveyor?

A:

Space is often the deciding factor. When the motor needs to sit beside the driven shaft rather than in line with it, a right-angle gearbox saves floor space and simplifies layout.

Where B Series makes the difference:

A port operator in Saudi Arabia replaced a parallel shaft setup on their gantry crane travel drives with B Series right-angle units. They cut the drive footprint by 40% and eliminated a custom steel platform that had been needed for motor support.

If you’re tight on space, sketch your layout and send it to us. We’ll recommend the right configuration — foot, flange, or hollow shaft.

Q 2: How does the B Series handle the heavy shock loads from crane travel and slewing?

A:

Crane travel means constant starts, stops, and reversals. Slewing gears take sudden impacts when the load swings. The B Series is built for these conditions.

What keeps it reliable:

· Case-hardened gears– surface hardened for wear, tough core for shock absorption

· heavy-duty bearings– designed for radial and axial loads that reverse direction

· Optional backstop– prevents reverse rotation on travel drives (a common failure point)

A mining operation in Indonesia uses B Series gearboxes on their stacker-reclaimer travel drives. The original gearboxes failed every 18–24 months from shock loads. After switching to B Series, the units have run over 4 years without replacement. Maintenance logs show no gear or bearing wear during scheduled inspections.

Tell us your duty cycle and shock load frequency. We’ll select the right size and bearing configuration.

Q 3: When do I need a backstop? How do I specify it? (And should I choose H Series or B Series?)

A:

Backstops are one-way clutches that prevent reverse rotation. They are essential on inclined conveyors, bucket elevators, and crane travel drives where the load could back-drive the motor when stopped.

Common applications that need a backstop:

How to choose between H Series (parallel) and B Series (right-angle):

Both series can be fitted with backstops. The choice isn’t about which is better — it’s about which fits your machine layout.

How to specify a backstop:

· Rotation direction– backstops are unidirectional; tell us whether the output shaft turns clockwise or counterclockwise (view facing output shaft)

· Torque– we match the backstop rating to your application’s peak torque

Case example:A cement plant in South Africa needed backstops on their inclined raw material conveyors. They had space for a parallel shaft layout, so they chose H Series with backstops. In a different section of the same plant — the ship loader travel drives — space was tight, so they chose B Series with backstops instead. Both applications solved the reverse rotation problem. The right choice depended entirely on layout constraints.

For a new project, tell us your conveyor incline angle and layout sketch. We’ll recommend whether a backstop is needed and which series fits your space.

📬shawn.zhu@helmedrive.com 

B Series Right-Angle Bevel-Helical Gear Speed Reducer – Application-Based Selection Guide

◆When a right-angle drive is needed to save space or align with equipment layout, the HelmeDrive B Series offers a robust solution. It combines a bevel gear input stage with helical output stages, providing high efficiency and torque density in a compact, 90° configuration.

◆The HelmeDrive B Series includes three-stage (designated as B3) and four-stage (designated as B4) versions, covering frame sizes 23 to 32. Speed ratios range from approximately 19.5:1 to 355:1, with output torque capabilities matching the H Series (up to 1,030 kN·m and beyond). This series is ideal for applications where the motor must be mounted perpendicular to the driven shaft, such as in tight machinery rooms or on mobile equipment.

Note: The "B3" and "B4" in the model designation refer to the number of reduction stages (three-stage and four-stage respectively). They are not to be confused with IEC mounting position codes.

Product Overview

Application Areas (Derived from Driven Machine Classifications)

The B Series shares the same application spectrum as the H Series, but its right-angle design brings additional advantages where space is constrained or where the drive train requires a 90° turn.

1. Space-Constrained Conveyor Drives

Common Pain Points:

n Limited space alongside conveyor frame

n Need for motor to be placed away from material flow

n High radial loads from pulley

Selection Recommendations:

2. Crane Travel and Slewing Mechanisms

Common Pain Points:

n Tight space on crane girders

n Need for smooth acceleration/deceleration

n Frequent reversing operation

Selection Recommendations:

3. Vertical Agitators and Mixers

Common Pain Points:

n Motor mounted above tank for hygiene

n Need for right-angle drive to access shaft

n Corrosive environment

Selection Recommendations:

★Technical Specifications Reference

*Note: Torque values are typical; consult HelmeDrive for exact ratings at specific ratios and operating conditions. *For size 26, rated torque up to 1,030 kN·m is achievable in some configurations (see calculation example).

★What to Know Before You Buy

n Right-angle or parallel?– Choose B Series when the motor must be offset 90° from the driven shaft. This is common in space-limited installations, vertical shafts, or when the motor needs to be placed away from the driven equipment for maintenance access.

n Understanding B3/B4 designation– In the model code,B3andB4refer to the number of reduction stages (three-stage and four-stage respectively). This is different from IEC mounting position codes. When ordering, please specify both thestage count (B3 or B4)and the requiredmounting configuration(foot-mounted, flange-mounted, etc.).

n Assembly position matters– The B Series offers multiple assembly positions (Design A, B, C) that determine the location of the feet relative to the output shaft. Specify your required arrangement when ordering.

n Verify the speed ratio– Use the actual ratio tables to confirm the exact output speed. The nominal ratios (e.g., 20, 25, 28…) are approximations; actual ratios vary slightly and affect torque.

n Check hollow shaft options– For direct shaft mounting, consider the hollow shaft version with shrink disk. This eliminates couplings and saves space.

n Lubrication – separate circuits– Bevel and helical stages may have separate lubrication; ensure both are filled to the correct level based on mounting position.

n Service factor same as H Series– Use the same f1, f2, f3 coefficients and temperature adjustments as outlined for H Series. The mechanical rating is comparable.

n Let HelmeDrive assist– With complex right-angle drives, small errors in load direction or mounting can affect bearing life. Provide a detailed installation sketch and load data for optimal selection. 

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 heavy industrial needs.

📬shawn.zhu@helmedrive.com