What is a helical gearbox?

A helical gearbox is a power transmission device that uses helical gears — teeth arranged at a diagonal angle to the gear axis — to mesh with one another. This diagonal arrangement produces gradual tooth engagement, resulting in smooth, quiet, and efficient power transmission compared to spur gears. Helical gearboxes are available in inline (shaft-to-shaft), shaft-mounted, and helical-bevel (90-degree) configurations.

Helical vs worm gearbox — which is better?

Both serve different purposes. Helical gearboxes offer superior efficiency (>96%) and higher power transmission capacity (up to 200 kW), making them ideal for continuous-duty industrial applications like steel mills and mining operations. Worm gearboxes offer self-locking capability, compact size, and high torque multiplication, making them perfect for lifting and positioning applications. Choose helical for power transmission; choose worm for load-holding and compact space-constrained designs.

What industries use helical gearboxes?

Helical gearboxes are the standard choice in heavy industries requiring reliable, continuous power transmission: (1) Steel mills — rolling mill drives, coil handling, furnace drives. (2) Cement plants — kiln drives, ball mill motors, clinker cooler conveyors. (3) Mining — conveyor systems, bulk material handling, crusher drives. (4) Pulp and paper — paper machine drives, pulping equipment. (5) Water treatment — pump drives, aerator systems. (6) Large manufacturing facilities — mixer drives, compressor drives, pump systems. Their high efficiency minimizes energy losses, reducing operating costs in 24/7 production environments.

Helical Gearboxes — H, K, F & S Series

Name: Helical Gearboxes
Brand: Anand Gears

Anand Gears helical gearbox with hardened, ground teeth

Heavy-Duty Power Transmission

High-Efficiency Helical Gearboxes for Industrial Power Transmission

Anand Gears helical gearboxes deliver smooth, efficient power transmission for demanding industrial applications. Available in three main series — Helical Inline (H-Series), Shaft-Mounted (F-Series), and Helical-Bevel (K-Series) — our gearboxes feature hardened and ground helical teeth for superior durability and quiet operation. With efficiency exceeding 96% and power outputs from 0.12 kW to 200 kW, these units are engineered for 24/7 operation in steel mills, cement plants, mining operations, and large manufacturing facilities where energy efficiency directly impacts operational cost.

Efficiency >96% (minimal energy losses in continuous duty)

Hardened and ground helical gears for precision and durability

Smooth, quiet operation due to diagonal tooth engagement

Power from 0.12 kW to 200 kW — full range for any scale

Inline, shaft-mounted, and helical-bevel configurations

Cast iron and stainless steel options for corrosive environments

Product Series

Helical Gearbox Series

Three specialized series to match any industrial power transmission requirement.

H-Series: Helical Inline

Parallel shaft helical gearboxes with input and output shafts on the same horizontal line. Ideal for conveyor drives, blower systems, and pump applications where inline transmission minimizes space and alignment complexity.

Power 0.12–200 kW

Shaft Config Parallel horizontal

Efficiency >96%

F-Series: Shaft-Mounted

Gearbox mounted directly on the driven shaft (e.g., conveyor pulley, pump shaft) without requiring a separate output coupling. Reduces footprint, installation time, and bearing loads on driven equipment. Perfect for retrofit installations.

Power 0.12–75 kW

Mounting Direct shaft coupling

Installation Fast retrofit

K-Series: Helical-Bevel

Combines helical primary stage with bevel secondary stage for 90-degree shaft orientation. Enables power transmission to perpendicular shafts while maintaining high efficiency. Used in mill drives, kiln systems, and multi-point synchronized lifting.

Power 0.25–100 kW

Shaft Angle 90 degrees

Efficiency 94–96%

Crane duty helical gearbox for hoist and travel drives

Heavy Duty

Crane & Hoist Duty Helical Gearboxes

For EOT crane and hoist applications — main hoist, auxiliary hoist, long travel, and cross travel drives — we build helical gearboxes to crane duty: fabricated steel housings, case-hardened and profile-ground alloy steel gearing, roller bearings sized for shock and reversing loads, and solid, geared, or hollow output shaft options in horizontal or vertical orientation.

Stages	Typical Ratio Band	Typical Use
Single stage	up to ~6:1	High-speed travel drives
Two stage	~6:1 – 25:1	Cross travel, light hoists
Three stage	~25:1 – 130:1	Main and auxiliary hoists
Four stage	~130:1 – 650:1	Slow, high-torque hoisting

Centre distance and housing (fabricated steel or cast iron) are built to the duty — shock class, mechanism class, and brake-motor pairing are confirmed at enquiry. Shaft-mounted hoist configurations are available for compact machine rooms.

Industry Solutions

Helical Gearbox Applications

Proven reliability in the world's most demanding industrial environments.

Steel Mills

Rolling mill drives, coil handling systems, and furnace feed mechanisms. Heavy-duty construction tolerates shock loads and sustained high-torque operation. Efficiency >96% reduces energy costs in 24/7 mills.

Cement Plants

Rotary kiln drives, ball mill motors, and clinker cooler conveyors. The gearbox design handles abrasive dust environments and continuous duty cycles. High efficiency reduces electricity consumption in energy-intensive operations.

Mining Operations

Conveyor belt systems, crusher drives, and hoisting equipment. Engineered for extreme shock loads and bulk material handling. Cast iron housings resist corrosion from mine moisture and dust.

Pulp & Paper Mills

Paper machine drives, pulping equipment, and coating systems. Reliability and efficiency are essential for maintaining production schedules. Quiet helical gears minimize vibration-induced damage to delicate machinery.

Water Treatment Plants

Pump drives, aerator systems, and filter mechanisms. Stainless steel variants resist corrosion in wet environments. High efficiency reduces operational costs in facilities running 24/7.

Large Manufacturing

Industrial mixer drives, compressor systems, and large-format pump applications. The modularity and scalability (0.12–200 kW) support entire facility power transmission needs.

Engineering Data

Helical Gearbox Technical Specifications

Detailed performance characteristics across all three series.

Series	Power	Efficiency	Shaft Config	Tooth Type	Best For
H-Series Inline	0.12–200 kW	>96%	Parallel	Hardened & Ground	Conveyors, pumps
F-Series Shaft-Mounted	0.12–75 kW	>95%	Direct Mount	Hardened & Ground	Retrofit, compact
K-Series Helical-Bevel	0.25–100 kW	94–96%	90 Degree	Hardened & Ground	Mill drives, lifts

Pricing & Availability

Anand Gears Helical Gearboxes are competitively priced for the Indian market. Pricing depends on power rating, configuration, and customisation requirements.

Starting From

₹8,000

Compact Units (0.12–3 kW)

Mid-Range

₹35,000

Standard Industrial (5–50 kW)

Heavy-Duty

₹1,50,000+

Large Units (100–200 kW)

Prices are indicative and vary based on specifications. GST extra. Contact us for an exact quotation.

Get Exact Quote

Complete the Drive Chain

Let the helical gearbox do the heavy reduction and the VFD do the trim — the combination usually means a smaller drive and a motor running in its efficient band. We size and supply the whole chain, panel included.

VFD Drives → Control Panels & Starters → All Automation →

Helical Gearboxes