If you are looking for a reliable slew drive manufacturer in India, this article is your complete guide. Kavitsu Robotronix Pvt. Ltd., based in Satara, Maharashtra, manufactures and exports SE type and WE type slew drives for solar trackers, cranes, wind turbines, satellite positioning systems, and industrial automation. With over 30 years of manufacturing experience and export to 30+ countries, Kavitsu is one of India's most trusted slew drive suppliers.
What Is a Slew Drive?
A slew drive is a complete, self-contained rotational drive assembly that combines a slewing ring bearing with a precision worm gear mechanism and motor mounting interface in a single sealed housing. Unlike a standalone slew ring bearing that only enables passive rotation, a slew drive actively powers, controls, and locks the rotation.
The defining feature of a slew drive is its worm gear self-locking: when the motor stops, the load cannot back-drive the worm gear, so the driven structure (a solar panel array, crane boom, or antenna) stays exactly in position without any braking power. This is essential for energy efficiency and safety in solar trackers, cranes, and positioning systems.
SE Type vs WE Type Slew Drive
SE Type Slew Drive – Standard Enclosed (Horizontal Worm Shaft)
The most widely used configuration. The worm shaft is oriented horizontally, and the motor mounts on either side of the housing. The output flange rotates about a vertical axis.
- Best for: Single-axis solar trackers (East–West daily tracking), horizontal crane slewing, azimuth positioning of antennas and radar
- Torque range: Approx. 500 Nm to 200,000 Nm (custom higher on request)
- Motor interface: Electric motor (AC or DC), hydraulic motor
- Available sizes: SE3, SE5, SE7, SE9, SE12, SE14, SE17, SE21, SE25 and above
WE Type Slew Drive – Worm Enclosed (Vertical Worm Shaft)
The worm shaft is oriented vertically, and the motor mounts above or below the housing. The output flange rotation is horizontal, tilting the driven structure up or down.
- Best for: Dual-axis solar trackers (elevation axis), tilting of antennas and dishes, any application requiring vertical-axis worm drive
- Torque range: Approx. 500 Nm to 100,000 Nm
- Motor interface: Electric motor (AC or DC), hydraulic motor
- Available sizes: WE5, WE7, WE9, WE12, WE14 and above
Slew Drive Technical Specifications
| Parameter | SE Type | WE Type |
|---|---|---|
| Worm Shaft Orientation | Horizontal | Vertical |
| Output Rotation Axis | Vertical (azimuth) | Horizontal (elevation) |
| Self-Locking | Yes – worm gear | Yes – worm gear |
| IP Protection Rating | IP65 standard | IP65 standard |
| Motor Options | AC, DC, hydraulic | AC, DC, hydraulic |
| Backlash | < 0.1° standard | < 0.1° standard |
| Gear Ratio | 50:1 – 150:1 typical | 50:1 – 150:1 typical |
| Lubrication | Oil or grease sealed | Oil or grease sealed |
| Temperature Range | −30°C to +80°C | −30°C to +80°C |
| Solar Application | Single-axis tracker | Dual-axis elevation axis |
Applications of Kavitsu Slew Drives
- Solar trackers: SE type for single-axis trackers; SE + WE combination for dual-axis trackers — both residential and utility-scale solar farms
- Cranes and hoists: Powered slewing for crane superstructures, material handling cranes, vehicle-mounted cranes
- Wind turbines: Yaw and pitch drives (slew drives replace separate bearing + motor + pinion systems)
- Satellite dish & antenna positioning: Precise azimuth and elevation positioning for satellite communication, radar, and radio astronomy
- Marine deck equipment: Deck cranes, offshore equipment, vessel-mounted positioning systems
- Robotics and automation: Robot joint rotation, servo-driven turntables, automated guided vehicles
- Military and defence: Weapon platform rotation, radar and sensor positioning, armoured vehicle turrets
Why Source Slew Drives from India?
- Cost advantage: Indian-manufactured slew drives offer 25–40% cost savings versus equivalent European products at the same quality specification
- 30+ years manufacturing: Kavitsu has the engineering depth to handle custom torque requirements, non-standard motor interfaces, and special environmental specifications
- Direct manufacturer: No distributors — you deal directly with the engineering team for faster decisions and lower prices
- Export documentation: Full commercial invoice, packing list, certificate of origin, material test certificates — standard for all export orders
- FOB Mumbai (JNPT): Well-connected port with direct sailings to Europe (18–22 days to Hamburg), USA (18–25 days to LA/Houston), UAE (5–8 days to Jebel Ali), and Australia (14–20 days)
Source Slew Drives Directly from the Manufacturer
Tell us your application (solar tracker, crane, wind turbine, antenna), required output torque (kNm), motor type (AC/DC/hydraulic), and IP requirement. Kavitsu Robotronix will confirm engineering suitability and provide a competitive quote within 24 hours — for India and 30+ export countries.
Request Slew Drive Quote