The SC21-125-RC-24H15300 is a 21-inch electric worm-gear slewing drive for low-speed rotary motion. It delivers 15 kN·m output torque, 105.8 kN·m holding torque, 203 kN·m tilting moment and ≤0.15° precision for large solar tracking, aerial platforms, truck-mounted cranes and OEM rotary systems.
Accionamiento de giro
SC21 21-Inch Slewing Drive | 24VDC Worm Gear Rotary Actuator for Heavy Loads
SC21 21-inch slewing drive with 24VDC IP65 motor. 15 kN·m output torque, 105.8 kN·m holding torque, 203 kN·m tilting moment, 125:1 ratio, ≤0.15° precision for large solar trackers and heavy machinery.
Manufactured and supplied by Elerover — Accionamiento de giro manufacturer and OEM partner for industrial, medical, furniture and solar motion systems.
Parámetros clave
- Drive Type
- 21-inch electric worm-gear slewing drive
- Gear Ratio
- 125:1
- Efficiency
- 40%
- Motor Code
- 24H/15/300 (24H15300)
- Product Model
- SC21-125-RC-24H15300
- Output Torque
- 15 kN·m / 11.1×10³ lbf·ft
- Motor Voltage
- 24 VDC
- Tilting Moment
- 203 kN·m / 149.7×10³ lbf·ft
Descripción general del producto
Características clave
- 21-inch worm-gear slewing drive with 24VDC IP65 reducer motor
- Output torque 15 kN·m / holding torque 105.8 kN·m
- Tilting moment 203 kN·m
- Gear ratio 125:1 with precision ≤ 0.15°
- Rated output speed 0.012 rpm
- Hall A/B feedback for closed-loop positioning
Especificaciones técnicas
| Product Model | SC21-125-RC-24H15300 |
|---|---|
| Drive Type | 21-inch electric worm-gear slewing drive |
| Rated Output Speed | 0.012 rpm |
| Output Torque | 15 kN·m / 11.1×10³ lbf·ft |
| Tilting Moment | 203 kN·m / 149.7×10³ lbf·ft |
| Holding Torque | 105.8 kN·m / 78.0×10³ lbf·ft |
| Static Axial Rating | 1598 kN / 359.2×10³ lbf |
| Static Radial Rating | 640 kN / 143.9×10³ lbf |
| Dynamic Axial Rating | 335 kN / 75.3×10³ lbf |
| Dynamic Radial Rating | 385 kN / 86.6×10³ lbf |
| Gear Ratio | 125:1 |
| Efficiency | 40% |
| Precision | ≤ 0.15° |
| Motor Voltage | 24 VDC |
| Motor Code | 24H/15/300 (24H15300) |
| Motor Protection | IP65 |
| Motor Rated Current | ≤ 6.5 A |
| Approx. Weight | 120 kg |
Aplicaciones
- Large solar trackers
- PV / CSP tracking systems
- Aerial platforms and man lifts
- Truck-mounted cranes
- Antenna positioning
- Industrial rotary actuation
Detalles adicionales
21-Inch Slewing Drive for Extra-Heavy Tracking Loads
SC21-125-RC-24H15300 21-Inch Slewing Drive
A heavy-duty 21-inch electric slewing drive for low-speed, high-torque rotary motion.
The SC21-125-RC-24H15300 integrates a slewing bearing, worm-gear transmission and 24VDC IP65 reducer motor with hall feedback,
making it suitable for large solar trackers, aerial platforms, truck-mounted cranes and OEM rotary systems.
Rated Output Speed
0.012 rpm
0.012 rpm
Output Torque
15 kN·m
15 kN·m
Holding Torque
105.8 kN·m
105.8 kN·m
Tilting Moment
203 kN·m
203 kN·m
Gear Ratio
125:1
125:1
Output Torque
15 kN·m
15 kN·m
Holding Torque
105.8 kN·m
105.8 kN·m
Precision
≤ 0.15°
≤ 0.15°
Motor / Weight
24V IP65 · 120 kg
24V IP65 · 120 kg
Product Drawing
SC21 Dimensions & Performance Drawing
Official dimensional drawing for model SC21-125-RC-24H15300 Rev.A — mounting interfaces, motor data, load chart and wiring.
Product Overview
21-Inch Worm Gear Slewing Drive for Extra-Heavy Rotation
The SC21 is sized for projects that outgrow the SC17 class—extra-large solar arrays, aerial platforms and industrial rotary systems that need higher tilting and holding capacity.
This 21-inch slewing drive combines a worm-gear rotary mechanism with a 24VDC IP65 reducer motor (24H/15/300) and magnetic pulse feedback.
With 15 kN·m output torque, 105.8 kN·m holding torque, 203 kN·m tilting moment and ≤0.15° precision,
SC21 supports large single-axis solar trackers and heavy OEM rotary platforms.
Defined M20 mounting patterns, Ø615 envelope geometry and hall A/B wiring support repeatable mechanical and electrical integration for global B2B projects.
Product Highlights
- 21-inch worm-gear slewing drive with integrated 24VDC motor.
- Output torque 15 kN·m and holding torque 105.8 kN·m.
- Tilting moment 203 kN·m for extra-large structures.
- Gear ratio 125:1 with precision ≤ 0.15°.
- 24VDC IP65 reducer motor with hall A/B feedback.
- Approx. weight 120 kg for heavy solar and machinery use.
Key Features
Built for Large Solar Tracking and Heavy Machinery Rotation
Designed for solar, aerial work and industrial systems that need reliable single-axis rotary motion with high load capacity.
01
21-Inch Load Class
Higher torque and tilting ratings than SC14/SC17 for extra-large arrays, man lifts and heavy rotary platforms.
02
High Tilting Capacity
203 kN·m tilting moment supports large structures under wind and unbalanced loads.
03
Low-Speed Precision
Rated output speed 0.012 rpm with ≤0.15° precision for smooth tracking movement.
04
24VDC IP65 Drive
Outdoor-ready 24H/15/300 reducer motor with hall feedback for solar sites and industrial controllers.
05
Strong Static Ratings
Static axial rating 1598 kN and static radial rating 640 kN for demanding structures.
06
OEM Mounting Geometry
36×M20 / 35×M20 / Ø22 patterns and Ø615 envelope support repeatable machine design.
Technical Data
Slewing Drive Performance Parameters
Performance values from drawing SC21-125-RC-24H15300 Rev.A for product selection and early engineering review.
| Parameter | Metric Value | Imperial Value |
|---|---|---|
| Rated Output Speed | 0.012 rpm | – |
| Output Torque | 15 kN·m | 11.1×10³ lbf·ft |
| Tilting Moment (Max.) | 203 kN·m | 149.7×10³ lbf·ft |
| Holding Torque | 105.8 kN·m | 78.0×10³ lbf·ft |
| Static Axial Rating | 1598 kN | 359.2×10³ lbf |
| Static Radial Rating | 640 kN | 143.9×10³ lbf |
| Dynamic Axial Rating | 335 kN | 75.3×10³ lbf |
| Dynamic Radial Rating | 385 kN | 86.6×10³ lbf |
| Gear Ratio | 125:1 | – |
| Efficiency | 40% | – |
| Precision | ≤ 0.15° | – |
| Approx. Weight | 120 kg | – |
Note: Values are for product selection reference from drawing SC21-125-RC-24H15300 Rev.A. Confirm final configuration for your load case.
Motor & Feedback
24VDC Motor Performance & Wiring
SC21 uses a 24H/15/300 IP65 reducer motor with magnetic pulse generator for closed-loop positioning.
| Item | Value |
|---|---|
| Motor Code | 24H/15/300 (24H15300) |
| Rated Voltage | 24 VDC |
| Rated Current | ≤ 6.5 A |
| Motor Output Torque | 300 N·m |
| Motor Output Speed | 1.5 rpm |
| IP Class | IP65 |
| Operating Temperature | -40°C ~ +85°C |
| Wire / Pin | Color | Function |
|---|---|---|
| 1 | Black | Motor − |
| 2 | Red | Motor + 24V |
| 3 | Gray | Hall GND |
| 4 | Brown | Hall + (5–12V) |
| 5 | Blue | Hall A |
| 6 | Orange | Hall B |
| E | Yellow/Green | GND |
Hall feedback: 2 square-wave channels with 90° phase quadrature, operating voltage DC 5–24 V.
Mounting Snapshot
Key Installation Dimensions
Selected envelope dimensions from the SC21 drawing for early mechanical layout.
| Item | Value |
|---|---|
| Product Model | SC21-125-RC-24H15300 |
| Drive Type | 21-inch electric worm-gear slewing drive |
| Motor Interface | 24VDC IP65 with hall encoder |
| Outer Envelope | Approx. Ø615 mm |
| Key Bolt Circles | Ø584 / Ø525 / Ø535 / Ø465 / Ø432 mm |
| Mounting Pattern | 36×M20 Deep 40 / 35×M20 Thru / Ø22 holes |
| Grease Nipple | 1/8''-27 NPT |
| Cable Length | Approx. 1 m (standard) |
Applications
Typical Application Areas
Ideal where extra-large single-axis slewing needs high torque, high tilting capacity and 24V closed-loop drive.
Selection Support
How to Confirm the Right Slewing Drive
1
Confirm Loads
Share axial / radial loads, tilting moment and holding requirements for your tracker or platform.
2
Confirm Motion Needs
Provide required speed, travel angle, duty cycle, tracking accuracy and environmental conditions.
3
Confirm Electrical Interface
Confirm 24V supply, current capacity, hall wiring, cable length and controller type.
FAQ
What does “21-inch” mean on SC21?
It refers to the slewing-drive size class. SC21 offers higher torque and tilting capacity than SC17 for extra-large single-axis solar trackers and heavy industrial rotary platforms.
Can SC21 be used on large solar trackers?
Yes. Output torque 15 kN·m, tilting moment 203 kN·m and ≤0.15° precision suit many large single-axis PV / CSP tracker designs — confirm panel area and wind load first.
Does SC21 include motor feedback?
Yes. The 24VDC IP65 motor includes a magnetic pulse generator with Hall A/B quadrature signals for position feedback.
How does SC21 compare with SC17?
SC21 steps up tilting moment (203 vs 135.6 kN·m), holding torque and static ratings for heavier structures. Share your load case and we will confirm the best size class.
Can mounting and cables be customized?
Yes. Flange interfaces, motor packages, cable length and feedback options can be reviewed against your mechanical layout for OEM / ODM projects.
Need a Custom Slewing Drive?
Send load, tracker size, voltage and mounting drawings. Elerover engineering will help size SC21 or a related slewing configuration.
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