Mining Gearboxes for the Global Recovery – GTP Planetary & H Series

For mining engineers and procurement teams, the challenge is consistent: equipment must handle high torque, run continuously, and survive harsh conditions – dust, heat, high altitude, and weak grid connections in remote locations.

Every mine depends on the same three types of equipment: conveyors that move ore over kilometres, crushers that break rock, and ball mills that grind it to powder. Behind each of these machines sits a gearbox – and in heavy‑duty mining, the choice of gearbox determines whether a plant runs 24/7 or stops for unscheduled maintenance.

This guide covers two proven HelmeDrive product families for mining applications: the GTP planetary gearbox and the H series parallel shaft gearbox. We will walk through which series fits which application – and why the combination matters in today's mining market.

This guide is for informational purposes only. Always consult a qualified engineer for final selection.

GTP Series – Planetary Gearbox for High‑Torque Mining Applications

What It Is

The GTP series is a heavy‑duty planetary gear reducer engineered for the most demanding industrial environments. It features a modular design with 27 frame sizes (09 to 36), covering a rated output torque range from 22 kN·m to 2,600 kN·m and speed ratios from 25:1 to 4,000:1. Single-stage efficiency exceeds 90%. For multi-stage configurations, contact our engineering team for a thermal and efficiency review specific to your application.

Where It Excels

1. Ball Mills and SAG Mills

Ball mills and SAG mills are the heaviest consumers of torque in any mineral processing plant. The mill shell – filled with ore and steel balls – must rotate continuously under extreme load. GTP planetary gearboxes deliver the high torque density required for these applications, with multi-stage configurations available for the deepest reductions.

2. Overland Conveyors

Long-distance conveyors – often 3‑5 km or more – require high torque at low output speed. GTP planetary gearboxes deliver this in a compact footprint, with multiple reduction stages in a single housing. This is ideal for conveyor head pulley drives where space is often limited, and where a single gearbox failure can stop an entire mine.

3. High-Starting-Torque Applications

Mines in remote locations often struggle with weak grid connections. Starting a loaded conveyor or mill under full load can cause voltage drops that trip transformers. GTP planetary gearboxes, when paired with VFDs, handle the torque demands while limiting inrush current.

4. Extreme Environments

The GTP series is rated for ambient temperatures from -10°C to +40°C (customizable for extreme conditions) and altitudes up to 1,000m. Multiple input types are available – coaxial, bevel gear, helical gear, bevel-helical – and multiple output types including hollow shaft with shrink disc, hollow shaft with involute spline, solid shaft with key, and solid shaft with involute spline.

Key Specifications

H Series – Parallel Shaft Gearbox for Heavy Conveyors and Crushers

What It Is

The H series is a heavy-duty parallel shaft helical gear reducer designed for high-torque, continuous-duty applications. It is engineered specifically for environments where heavy loads, continuous operation, and punishing conditions would destroy inferior equipment. Output torque up to 900,000 Nm, covering a wide range of conveyor and crusher drive power requirements.

Where It Excels

1. Overland and In-Pit Conveyors

Conveyors are the arteries of any mine. They move ore from the pit to the crusher, from the crusher to the mill, and from the mill to the stockpile. H series parallel shaft gearboxes are specifically engineered for conveyor drive applications in mining. They offer efficiency ≥95% across the full power range, which translates directly into lower energy costs over 24/7 operation.

2. Crusher Drives

Jaw crushers, cone crushers, and impact crushers all share one brutal reality: starting under load generates torque spikes that punish gearboxes. The H series parallel shaft design uses large-diameter bearings and a robust cast iron housing to withstand these impacts. It also offers higher overhung load capacity – critical when a crusher is belt-driven.

For crushers in remote mines with weak grid connections, pairing H series with a VFD limits inrush current to ≤150% of rated while eliminating mechanical shock.

3. Stackers, Reclaimers, and Shiploaders

Stockpile equipment operates outdoors in dust, rain, and extreme temperatures. H series gearboxes use radial shaft seals as standard, with labyrinth seals available for high‑dust environments. For coastal or corrosive sites, consult our engineering team for coating and material options.

4. Right-Angle Configurations (B Series)

For applications requiring a 90° output, H series offers B3/B4 right-angle bevel-helical configurations as standard. No external bevel box required – the right-angle output is integrated into the housing. This saves installation space in tight crusher stations or mill buildings.

Key Specifications

Selection Guide – GTP vs H Series

A single mine typically requires multiple gearboxes across different equipment types. Here is how the GTP and H series come together as a complete drive solution:

● Ball mill: GTP planetary — highest torque density (up to 2,600 kNm)

● Overland conveyor: GTP or H series — depending on torque vs radial load requirements

● Belt‑driven crusher: H series parallel shaft — handles overhung load, VFD‑ready

● Stacker / reclaimer: H series — outdoor duty, sealing options for dust

● Right‑angle crusher drive: H series B3/B4 — integrated right‑angle output, saves space

Most mines order 4‑6 gearboxes across these applications. Standardizing on GTP and H series simplifies spare parts inventory, reduces training requirements, and speeds up maintenance across the entire site.

How to Choose – Quick Decision Table

First, determine your application: ball mill or crusher? Conveyor or stacker?

◆ For ball mills, SAG mills, and high-torque overland conveyors, the GTP planetary series provides high torque density in a compact footprint.

◆ For standard conveyors, crusher drives, stackers, and reclaimer applications, the H series parallel shaft provides proven reliability, high radial load capacity, and ≥95% efficiency.

Next, check your site conditions: ambient temperature, altitude, dust, and grid stability.

◆ At altitudes above 1,000m, thermal power verification is essential – cooling efficiency decreases.

◆ For weak grids, specify VFD compatibility and verify starting torque.

Finally, consider installation space and mounting preferences.

◆ Hollow shaft options (GTP and H series) allow direct mounting onto the driven shaft – no coupling, no baseplate, faster installation.

◆ Right-angle configurations (H series B3/B4) save space in compact crusher stations.

Case Studies

Case 1: Copper Conveyor Upgrade – Atacama, Chile

Customer: A copper mine in Chile's Atacama region operating a 4.2 km overland conveyor at 3,200m elevation.

Challenge: Required torque exceeded 1,200 kNm. High ambient temperature (42°C) and dusty conditions. Existing European-brand gearbox had long lead times for spares and high maintenance costs.

Solution: HelmeDrive supplied a GTP planetary gearbox with cooling fan, internal cooling coil, and PAO synthetic oil. The modular design and multiple-stage configuration matched the conveyor's torque and speed requirements precisely.

✅ Result: 26 months without gearbox-related downtime. Conveyor availability >98%. Energy cost lower than previous solution.

Case 2: Iron Ore Crusher Retrofit – Minas Gerais, Brazil

Customer: An iron ore mine in Brazil operating a 150kW cone crusher with weak grid connection.

Challenge: Direct-on-line starting caused voltage drops that tripped transformers. The site operated at 900m elevation with ambient temperatures reaching 35°C and high humidity during the rainy season. Couplings failed every 6‑8 months from shock loads.

Solution: HelmeDrive supplied an H series parallel shaft gearbox with hollow shaft and shrink disk (H2DH or H2DM configuration) paired with a heavy-duty VFD and IE4 motor. The VFD ramped the crusher from 0 to full speed, limiting inrush current to 140% of rated. The hollow shaft eliminated the coupling entirely.

✅ Result: No coupling failures in 18 months. Voltage drop eliminated. VFD allows speed adjustment to match feed variation.

How to Work with HelmeDrive for Your Mining Project

Here is how we help:

→ Remote video support – Installation guidance, alignment, and troubleshooting within your working hours.

→ Torque verification – Send us your application specs (conveyor length, mill size, crusher type). We will verify peak torque and thermal power.

→ Mounting drawings – Hollow shaft, foot, flange, and right-angle configurations.

→ Lead time – Standard configurations: 4‑6 weeks. Expedited options available.

Why Mines Choose HelmeDrive GTP and H Series

🔹 GTP planetary up to 2,600 kNm – Covers ball mills, SAG mills, and high-torque conveyors
🔹 H series parallel shaft – Proven in conveyors, crushers, stackers, reclaimers. ≥95% efficiency
🔹 Right-angle and hollow shaft options – Save installation space in compact plant layouts
🔹 VFD‑ready – Compatible with inverter-duty motors for weak grid conditions
🔹 Proven in high‑altitude and extreme environments – Thermal verification included
🔹 Proven in copper, lithium, and cobalt regions – Supporting mines across Chile, Peru, Brazil, Zambia, and DRC

As copper, lithium, and cobalt development accelerates, gearbox supply has become a project timeline factor — not just a specification detail.Mines that lock in reliable drive packages early keep their projects on track and avoid the costly delays that disrupt production schedules.

Get a Mining Gearbox Proposal

Send us:

√Application type (conveyor, crusher, ball mill, stacker)

√Motor power or torque required

√Site elevation and ambient temperature

√Preferred mounting (foot, flange, hollow shaft, right-angle)

√Existing equipment brand and failure history (if retrofitting)

📩 Sales inquiry: shawn.zhu@helmedrive.com

�FAQ

Q1: What is the difference between GTP and H series for mining?
A: GTP is a planetary gearbox – highest torque density, ideal for ball mills and high-torque conveyors. H series is a parallel shaft gearbox – high radial load capacity, ideal for belt-driven crushers and standard conveyors.

Q2: Can GTP handle ball mill starting torque?
A: Yes. GTP planetary gearboxes are designed for high-starting-torque applications. When paired with a VFD, they handle the torque demands while limiting inrush current.

Q3: Which series is better for a long overland conveyor in the Atacama?
A: Both GTP and H series are proven in overland conveyors. GTP planetary design provides high torque density in a compact footprint, while H series parallel shaft design provides high radial load capacity and ≥95% efficiency. Selection depends on torque and mounting requirements.

Q4: What are the lead times to Chile, Peru, or Zambia?
A: Sea freight to major ports in Latin America (Callao, Valparaíso) or Africa (Dar es Salaam, Durban): 30‑45 days. Production: 4‑6 weeks for standard configurations. Total approximately 8‑10 weeks.

Q5: Do I need special cooling for high‑altitude mines?
A: Above 1,000m, cooling efficiency decreases. Thermal power verification is essential. For sites above 2,500m, cooling fans or cooling coils are typically required. Provide site elevation when requesting a proposal.

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🌐 Contact us for a comparison quote:

📩  shawn.zhu@helmedrive.com     

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