Need a Right Angle Gearbox for Solar Trackers? S Series Helical Worm

If you landed here looking for a solar tracker gearbox, let us save you time: HelmeDrive's S series is not designed or certified for solar tracking applications. Solar trackers need purpose‑built slewing drives — with integrated worm gears, decades‑rated UV and weather sealing, and testing our standard industrial gearboxes have not passed. We will not sell you a product that was not built for your application.

But here is the interesting part. The same engineering characteristics that work well in solar tracking — right‑angle output, hollow shaft for direct mounting, self‑locking capability, compact footprint — are exactly what you need for screw conveyors, bucket elevators, industrial agitators, and gate actuators. Same gearbox architecture, different industry. If that sounds like your application, you are in the right place.

Need a Right Angle Gearbox? S Series Helical Worm – Compact, Self-Locking, Hollow Shaft Option

If your application needs a right-angle output with self-locking capability and better efficiency than a pure worm drive, the S series helical worm gearbox is worth a close look. The design combines a helical input stage with a worm gear final stage. That gives you higher overall efficiency than a traditional worm unit, plus the self-locking characteristic that many hoisting and conveying applications rely on.

When you need a hollow shaft version for shaft mounting (no baseplate, no coupling), the S series delivers. Let's walk through what makes it different, and how to choose between hollow and solid output.

Core Advantages of S Series Helical Worm Gearbox

🔹 Right angle output – Motor sits parallel to the driven shaft. Saves space in tight layouts.

🔹 Higher efficiency than pure worm gear – The helical first stage reduces the worm stage ratio. Overall efficiency can reach up to 89% under optimal conditions — varies with ratio, check selection tables for exact values. That means less heat, lower energy cost.

🔹 Self-locking capability – When the static efficiency ηs falls below 0.5, the gearbox provides static self-locking. This depends on ratio and operating conditions — consult our selection tables or technical team for verification. In plain terms: when the worm gear's friction is high enough to prevent back-driving under static load, the gearbox holds the load without a brake. We can verify this for your specific ratio and operating conditions.

🔹 Two output options: solid shaft or hollow shaft

• Solid shaft – for traditional foot or flange mounting.

• Hollow shaft – for shaft mounted installation directly onto the driven axle. Saves space, eliminates coupling and baseplate.

🔹 Permissible radial load listed in selection tables – No guesswork. You can check the exact overhung load capacity for your application.

Technical Highlights

In short, the S series delivers the right-angle compactness of a worm drive with improved efficiency from the helical input stage – making it a solid choice for screw conveyors, bucket elevators, and agitators where space and holding torque matter.

Hollow Shaft vs. Solid Shaft: Which One Do You Need?

This is the most common question we get. Here is how we help customers decide.

When to choose the solid shaft version (standard S series with foot or flange mount):

• You have a flat mounting base and enough space.

• You want to use a coupling between gearbox and driven machine.

• You need easy alignment and standard maintenance access.

When to choose the hollow shaft version (shaft mounted, often with torque arm):

• You want to mount the gearbox directly onto the driven shaft – no coupling, no baseplate.

• Space is tight, and you cannot fit a foot-mounted unit.

• Typical applications: screw conveyors, bucket elevators, agitators.

• You also get a torque arm to prevent the housing from rotating.

Application Spotlight: Screw Conveyors, Bucket Elevators & Agitators

S series helical worm gearboxes are well suited for applications that demand:

• Right angle output

• Self-locking or high holding torque

• Better efficiency than old‑school worm gears

• Compact, space-saving design

In material handling (screw conveyors, bucket elevators) and industrial mixing (agitators), the hollow shaft version is particularly popular because it simplifies direct shaft mounting.

Case Study: Shaft Mounted Gearbox for a Screw Conveyor

Location: A palm oil mill in Southeast Asia

Application: Screw conveyor for palm oil mill

Challenge: Very limited space above the conveyor; customer could not install a foot-mounted gearbox. Previous unit (another brand) failed due to overhung load.

Solution: HelmeDrive S series hollow shaft version, size S89, with torque arm.

Result: Direct mount onto the screw shaft. No coupling, no baseplate. The torque arm took all reaction torque. Unit has run for 22 months without seal leakage or bearing failure.

Note: This is a typical technical example based on common industry experience, not a description of a specific customer transaction.

Technical Support

We do not claim to have local warehouses in every country. What we do offer:

• Remote video support for installation and troubleshooting (within working hours of your time zone)

• Selection guidance with exact radial load calculations

• Drawings for hollow bore and torque arm configurations

If you need a replacement for an existing helical worm gearbox from a leading European brand, send us the model number or mounting dimensions. Our S series uses industry-standard mounting dimensions — we will check compatibility and provide a direct alternative where possible.

Why Customers Choose HelmeDrive S Series?

🔹 Transparent specifications – radial load values are listed, not hidden.
🔹 True hollow shaft option – not just an adapter. Engineered for shaft mounting.
🔹 Faster delivery than European brands for many common sizes – typically 4‑6 weeks for standard configurations.
🔹 No fake promises – we tell you what we can and cannot do.

Get a Quote or Selection Proposal

Send us your application details:

• Required output torque or power

• Output speed

• Hollow bore diameter (if shaft mounted)

• Ambient temperature and duty cycle

📩 Sales inquiry: shawn.zhu@helmedrive.com

�FAQ

Q1: Is the S series helical worm gearbox self-locking?
A: Yes, when the static efficiency ηs falls below 0.5. This depends on ratio and operating conditions — lubricant, temperature, and load all affect the friction coefficient. For hoisting and gate applications, we can recommend a ratio that provides static self-locking (ηs < 0.5). Check the selection tables or contact our technical team for verification.

Q2: Can I replace a helical worm gearbox from a European brand with your S series?
A: Possibly. Our S series uses industry-standard mounting dimensions. Send us the model number or the mounting dimensions (shaft height, flange pattern, hollow bore size) from your existing unit. We will check dimensional compatibility and confirm whether a direct replacement is available.

Q3: What is the advantage of a hollow shaft gearbox over a solid shaft with coupling?
A: Hollow shaft (shaft mounted) eliminates the coupling and baseplate. It is more compact, often cheaper, and reduces alignment issues. However, it requires a torque arm to hold the housing. Use solid shaft when you have space and prefer standard foot mounting.

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✦ HelmeDrive.com - Professional manufacturer of industrial gearbox in China ✦

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🌐 Contact us for a comparison quote:

📩  shawn.zhu@helmedrive.com     

📞 WhatsApp:  [+86-13196785788]