Reliable and Versatile H Series Gear Speed Reducer for Industrial Use

◆H Series parallel-shaft helical gear reducers serve high power applications with nominal output torques reaching 900 kilonewton meters across frame sizes 23 to 32. Single stage efficiency exceeds 96.5 percent, with two and three stage variants remaining above 93 percent. How it works: input rotation transfers through precision ground helical gear stages on parallel shafts. This arrangement distributes tooth contact forces across wide gear faces, maintaining load capacity under continuous heavy duty cycles. H2, H3, and H4 configurations offer ratios from 6.3 to 400 to suit varied speed reduction requirements. Foot, flange, and shaft mounted variants with solid or hollow output shafts accept direct motor coupling or separate input shaft arrangements. H Series units drive water conservancy gate hoists, large conveyor systems, crane lifting mechanisms, and industrial processing machinery where high torque transmission at low output speeds is required.

▼Key Features

• ★ Stronger load-bearing capacity

• ★ More optimized configuration

• ★ Leading-edge technology

▼Specifications

▼HelmeDrive Gearboxes Exporting-H Series Parallel-Shaft Gear Reducer

▼H Series Parallel-Shaft Gear Reducers Typical Industrial Applications

�FAQ

Q 1: You’re investing in a conveyor or crusher gearbox. How do you know it won’t let you down?

A:

A cement plant in Indonesia once told us:“We need a gearbox that survives peak loads without us worrying every shift.”

Here’s what they—and you—can expect from HelmeDrive's H Series:

The Indonesian plant? Three years later, routine inspection showedzero gear wear. They haven’t touched the gearbox since installation.

Send us your load profile and duty cycle. We’ll size it right—no guesswork.

Q 2: What’s the real service life? And what maintenance actually matters?

A:

25,000 hoursis the design number. In plain terms: nearly three years of continuous running.

What makes it last:

· Case-hardened gears:Surface hardened for wear resistance, tough core for shock absorption.

· Bearings:oversized for heavy radial and axial loads.

· Grinding:precision finish cuts friction.

Maintenance that pays off:

· First oil change: 100–150 hours (flushes break-in debris)

· Then: once a year or every 2,000–3,000 hours

A mining operation in Brazil ran H Series gearboxes on a crusher feed conveyor for four years. Oil analysis last year showed wear particles still well below alarm levels. They’re planning another two years before first overhaul.

For heavy-duty applications, we can set up a simple oil analysis schedule to catch issues early.

Q 3: What’s the most common cause of unexpected downtime in conveyors? (And how to avoid it.)

A:

Improper gearbox selection. Usually one of three things:

· Undersized for peak loads

· Overlooked thermal limits

· Missing backstop on inclined conveyors

H Series eliminates each risk:

A South African port had repeated belt reversals on their ship loader conveyor during power fluctuations. Each reversal meant 2–3 hours of cleanup. After installing H Series with backstops, reverse rotation stopped completely. They now save over150 hours of unplanned downtime annually.

Share your application details—we’ll run thermal and mechanical checks before quoting.

      📬shawn.zhu@helmedrive.com 

H Series Parallel Shaft Helical Gear Speed Reducer – Application-Based Selection Guide

◆When selecting a large helical gear speed reducer for heavy industrial applications, it is essential to consider not only power and speed but also the unique demands of continuous operation, high torque density, and the ability to withstand severe shock loads. Below is a practical selection guide based on real-world applications of the HelmeDrive H Series Parallel Shaft Helical Gear Speed Reducer—built on real-world data, so you can choose with confidence.

◆The HelmeDrive H Series is a heavy-duty parallel shaft helical gear reducer designed for the most demanding industrial environments. It offers a modular system with two-stage (H2), three-stage (H3), and four-stage (H4) configurations, covering frame sizes from 23 to 32. The series delivers a wide speed ratio range and high torque capacity, meeting the requirements of diverse applications such as material handling, mining, cement, and power generation.

Product Overview

Note: Torque values are based on nominal ratings; for exact data consult HelmeDrive engineering.

Application Areas (Derived from Driven Machine Classifications)

The table below summarizes key application sectors and typical machinery types where H Series reducers excel, based on industry-standard load classification.

1. Conveying Systems Applications

Common Pain Points:

n High radial loads from pulleys and rollers

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. 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 Space constraints in crane trolleys

Selection Recommendations:

3. Mining & Cement Industry Applications

Common Pain Points:

n Severe impact loads from crushers

n Abrasive dust causing wear

n High ambient temperatures

n Continuous heavy-duty operation

Selection Recommendations:

★Technical Specifications Reference

*Note: Torque values are indicative; actual ratings depend on ratio and operating conditions. *For size 26, a rated torque of 1,030 kN·m is achievable in certain configurations (see calculation example).

★What to Know Before You Buy

n Select the correct stage count based on ratio– Use H2 for ratios 6.3–22.4, H3 for 22.4–100, and H4 for 100–355. This ensures optimal efficiency and load sharing.

n Account for service factors– Multiply the required power by f1 (driven machine coefficient)from the load classification table,and adjust for ambient temperature. For example,a belt conveyor running 16h/day has f1 = 1.3–1.5.

n Check peak torque conditions– For applications with starting or braking torque exceeding 1.5× rated, ensure the gearbox can handle TA × f3. The formula is P2N ≥ (TA × n1 × f3) / 9550.

n Radial loads on output shaft– Verify that the actual radial force (e.g., from pulley or sprocket) does not exceed the permissible value for the selected size. HelmeDrive can provide exact limits on request.

n Lubrication matters– Standard units are splash-lubricated. For high-power continuous duty or extreme ambient temperatures, consider forced lubrication with cooler.

n Mounting position– H Series is designed forhorizontal mounting(foot-mounted, output shaft horizontal). For other orientations, consult HelmeDrive for oil level adjustments and lubrication recommendations.

n Let HelmeDrive calculate– Use our selection software or send your duty profile (power, speed, load type, daily hours, ambient conditions) to our engineers for precise 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 heavy industrial needs.

📬shawn.zhu@helmedrive.com