Helical-Worm Geared Reducer
SC Helical-Worm Geared Reducer
Helical Input Stage + Worm Output Stage · Compact, Self-Locking Reducer
The SC helical-worm geared reducer combines a hardened helical gear first stage with a worm gear output stage, achieving a higher reduction ratio in a more compact housing than a pure worm reducer, while keeping the self-locking output that worm drives are known for. Available in frame sizes 77, 87 and 97 (plus combination frames), the SC series is supplied with B5 or B14 flange input, solid or hollow output shaft, and an optional shrink disk for direct mounting onto driven equipment.
Gear ConfigurationHelical + Worm (2-Stage)
Output BehaviorSelf-Locking
Input MountB5 / B14 Motor Flange
Output ShaftSolid or Hollow + Shrink Disk
Terminal Box PositionR, B, L, T (0–270°)
Product Features
Key design and engineering features of the SC helical-worm geared reducer
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Hybrid helical + worm gear train delivers higher ratios in a smaller housing than a pure worm reducer
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Self-locking worm output stage holds position under load without a separate brake
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B5 / B14 flange input mounts directly to standard motor frames
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Hollow shaft with shrink-disk option available for direct, coupling-free installation
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SC..RC combination adds a helical pre-stage for higher input speed capacity
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Hardened, precision-ground gearing for stable, quiet running
Technical Specifications
Full parameter data and configuration options
⚙ SC Hollow Shaft Configuration
⚙reducer-4-config.jpg
📐 Parts Diagram
📐reducer-4-dim.jpg
| Parameter | Specification |
|---|
| Series | SC (Standard) / SCF (Flange-Mounted) / SCAZ, SCHZ (Hollow Shaft) / SC..RC (Combination) |
| Reducer Type | Helical-Worm Geared Reducer (2-Stage) |
| Frame Size Range | 77, 87, 97 (plus SC..RC combination frames) |
| Output Behavior | Self-locking under normal load |
| Housing Material | High-Strength Cast Iron |
| Gear Material | Hardened alloy steel helical stage + bronze alloy worm wheel |
| Output Shaft Options | Solid Shaft, Hollow Shaft, Hollow Shaft + Shrink Disk |
| Input Flange | B5 or B14 motor flange |
| Terminal Box Position | R (0°), B (90°), L (180°), T (270°) |
* Full dimensional drawings (mounting hole layout, shaft diameter, center height per frame size) are available on request — this series has a large number of frame/configuration combinations, so we prepare the exact drawing for your specific frame size and mounting type to guarantee accuracy.
Applications
Typical industries and equipment where the SC helical-worm geared reducer excels
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Packaging Machinery
Filling, capping and wrapping machines needing compact, self-locking speed reduction in a small footprint.
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Textile Machinery
Winding, weaving and dyeing equipment requiring stable low-speed, high-torque output.
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Food & Beverage Equipment
Mixers, conveyors and bottling line drives in food-grade production environments.
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Gate & Valve Actuation
Industrial gates, dampers and valve actuators that benefit from self-locking output holding.
Advantages
Why engineers and buyers choose CoreMotor Tech for the SC helical-worm geared reducer
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Flexible order quantities and competitive wholesale pricing — OEM/ODM bulk pricing available
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Export documentation and shipping coordination provided
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Compact hybrid design saves space versus a pure worm reducer at equivalent ratio
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English-speaking sales and technical support via WhatsApp
Frequently Asked Questions
Common questions about the SC helical-worm geared reducer
How is SC different from your NMRW worm reducer?+
NMRW is a single-stage pure worm reducer. SC adds a helical gear pre-stage before the worm stage, which lets it reach a higher overall ratio in a similar-sized housing, while still keeping the self-locking behavior of the worm output. SC is generally used for larger frame sizes (77–97) than NMRW.
Is the SC reducer self-locking like a pure worm reducer?+
Yes, under normal operating loads the worm output stage still provides self-locking, holding position without a separate brake. For very high back-driving loads, tell us your application and we'll confirm suitability.
What mounting options are available?+
SC accepts a B5 or B14 motor input flange, and the output can be a solid shaft or a hollow shaft with shrink-disk clamping for direct, coupling-free mounting onto your equipment shaft.
Is OEM/custom specification available?+
Yes. We support custom shaft configuration, terminal box orientation and branding with flexible MOQ. Contact us via WhatsApp for OEM pricing and exact dimensional drawings for your frame size.
