Reducer

Focusing on the design, manufacturing processes, heat treatment techniques, and key quality control points for all types of standard and non-standard gears.

SRVLS Series Helical-Worm

The SRVLS Series is a multi-stage compound drive that combines an initial helical gear pre-stage with subsequent worm gearing. Specifically developed for heavy-duty applications requiring ultra-high reduction ratios, exceptionally low output speeds, whisper-quiet operation, and a 90-degree right-angle layout, the SRVLS series utilizes precision helical gearing to optimize input efficiency, paired with precision-ground worm gearing for smooth torque multiplication. It serves as an ideal drive unit for low-speed material handling and continuous-duty process machinery.

Get In Touch WhatsApp

Product Description

Key Features & Engineering Advantages

Ultra-High Reduction Ratios & Smooth Motion: By pairing a helical gear pre-stage with worm gearing, large speed reductions are achieved within a single compact unit, ensuring smooth, vibration-free rotation at low output RPM.
Low Noise & High Damping: The continuous sliding-rolling mesh of the worm gear pairing absorbs dynamic vibration, running significantly quieter than multi-stage spur or planetary gearboxes.
Compact Right-Angle Architecture: The 90-degree right-angle design substantially reduces axial drive length, fitting seamlessly into tight equipment envelopes.
Dependable Self-Locking Characteristics: At higher reduction ratios, the worm mechanism provides static and dynamic reverse-drive resistance, adding passive holding safety for inclined conveyors and hoists.
Superior Sealing & Long Service Life: Case-hardened, precision-ground alloy steel worms mesh with high-wear bronze alloy wheels. Reinforced oil seals prevent leakage and extend maintenance intervals.

Product Configurations & Mounting Styles

Mounting Types:
- Foot-Mounted
- Flange-Mounted (B5 / B14 Output Flange)
- Shaft-Mounted with Reaction Torque Arm (Floating Drive)
Output Configurations:
- Solid output shaft (single or double extension)
- Hollow output shaft with standard keyway
- Hollow output shaft with keyless shrink disc (ideal for frequent reversing duty)
Input Configurations:
- Integrated direct-coupled AC induction / explosion-proof electric motors
- Standard IEC motor adapter flanges
- Servomotor input adapters
- Solid input shaft extension (for belts, sprockets, or external couplings)

Motor Options & Accessories

Thermal Protection: PTC thermistors or PT100 temperature sensors
Forced Cooling: Independent auxiliary cooling fan (recommended for low-frequency VFD operations)
Brakes & Feedback: Electromagnetic fail-safe holding brakes; incremental or absolute rotary encoders
Safety Accessories: Mechanical backstops (non-reversing directional clutches); anti-condensation space heaters (for cold or humid ambient conditions)

Primary Industrial Applications

Slow-Speed Conveying & Bulk Handling: Apron feeders, scraper conveyors, bucket elevator auxiliary drives, and industrial screw conveyors.
Water & Wastewater Treatment: Clarifier sludge scrapers, thickener bridges, rotary bar screens, and low-speed flocculation aerators.
Chemical & Pharmaceutical Mixing: High-viscosity reactor kettles, slow-speed liquid blending tanks, and industrial fermenters.
Specialized Industrial Machinery: Automated rotary display turntables, single/dual-axis solar tracking drives, and low-speed valve actuators.

Technical Specifications Overview

Parameter	Specifications
Gear Stages	Helical pre-stage + multi-stage worm gearing
Gear Ratio Range	Wide range (typically 100:1 up to several thousand to one)
Output Shaft Style	Hollow shaft (keyed / shrink disc), single or double solid shaft
Input Interface	Standard IEC flange, servomotor adapter, solid shaft, direct motor
Housing Material	High-grade cast iron (HT250) or die-cast aluminum alloy
Mounting Position	Universal mounting across M1 to M6 (horizontal, vertical, tilted)

Parameter Information

Parameter	Specifications
Model	SRVLS 25-150
Gear Ratio	5 – 100
Input Power	0.06 kW – 15 kW
Output Torque	3 Nm – 1,800 Nm

Our Core Strengths

Standardized Production Process Flow

Raw Material Forging & Normalizing
Premium alloy steel (20CrMnTi / 40Cr) forgings undergo strict normalizing and ultrasonic flaw detection to eliminate internal stress, optimize grain structure, and ensure superior core impact resistance.

01
02
Precision CNC Machining & Gear Hobbing
Multi-axis CNC lathes complete high-precision turning of reference datums and end faces. High-speed CNC gear hobbing and shaping machines precisely form the initial tooth profile with strict geometric allowances.
Controlled Carburizing & Heat Treatment
Processed in multi-purpose atmosphere-controlled furnace lines. Surface carburizing and quenching achieve a wear-resistant surface hardness of HRC 58–62, while preserving tough, shock-absorbing cores.

03
04
High-Precision CNC Gear Grinding
Advanced CNC profile gear grinding machines eliminate heat-treatment micro-distortions. Tooth flanks are precisely modified with crowning to achieve DIN Class 5–6 accuracy, ensuring whisper-quiet running.
Housing Machining & Clean Modular Assembly
Gearbox housings are machined on CNC horizontal machining centers for micron-level bore concentricity. Assembled in a clean workshop with top-tier bearings (SKF/NSK/C&U) and dual-lip oil seals to guarantee zero oil leakage.

05
06
100% Comprehensive Testing & Export Packaging
Every unit undergoes 100% full inspection: gear measurement center (CMM), dynamic running test (vibration, noise, temperature rise) and sealing test before multi-layer anti-rust film and solid plywood case packaging.

Core Advantage

Ultra-Silent Transmission

High-precision gear grinding delivers tooth surface roughness as low as Ra 0.4, with tight meshing, low vibration and noise for smoother equipment operation.

Extended Service Life

Premium materials matched with precise heat treatment ensure wear-resistant tooth surfaces and impact-resistant core, cutting maintenance and replacement costs.

All-Condition Adaptation

Custom solutions for high-speed heavy load, corrosion resistance and food-grade scenarios, eliminating trial-and-error costs in product selection.

Cost-Effective & Reliable Delivery

Scaled production supports tiered pricing for bulk orders with consistent quality; full-process control guarantees stable lead time and complete after-sales support.

Get In Touch

Logistics and After-Sales Service

Global Logistics & Export Packaging

VCI Anti-Rust & Solid Plywood Packaging

Internal VCI vacuum anti-rust packaging combined with seaworthy, non-fumigation plywood crates to guarantee zero corrosion during long ocean transit.

Flexible Multi-Modal Shipping

Supporting Sea Freight, Air Cargo, and Railway Express (FOB, CIF, DDP/DDU) with real-time tracking for punctual delivery.

Complete Export Documentation

Full clearance support including Certificate of Origin (CO/Form E), CE certificates, and factory dynamic test reports.

After-Sales Service & Technical Warranty

12-Month Full Quality Warranty

100% free replacement or repair for any manufacturing-related defects under standard operating conditions within 12 months.

24/7 Rapid Engineering Support

Professional technical team provides 2-hour response for model selection, installation guidance, and troubleshooting.

Lifetime Spare Parts Availability

Sufficient inventory of standardized modular parts (gears, shafts, seals, bearings) ensuring rapid worldwide dispatch.

Frequently Asked Questions (FAQ)

Can your gearboxes directly replace international brands like SEW, Flender, or Bonfiglioli?

Yes. Our modular gearboxes (R, F, K, S series and planetary units) are designed to standard international mounting dimensions. They can achieve 1:1 direct interchangeability in mounting hole positions, shaft diameters, input flanges, and gear ratios without modifying your existing machinery.

What technical parameters do I need to provide to select the right gearbox?

To help our engineering team calculate the ideal model, please provide: input motor power (kW/HP), input/output speed (RPM) or gear ratio, required output torque (Nm), mounting position (horizontal/vertical), and the specific application or working environment.

What is the typical lead time for standard and customized gearboxes?

For standard modular models (R/F/K/S series and cycloidal gearboxes), lead time is typically 7–15 days. For customized units with special ratios, shafts, or special flanges, lead time is usually 20–30 days. Emergency spare parts are dispatched within 48 hours.

How do you guarantee zero oil leakage and transmission durability?

All gearboxes utilize precision-machined CNC housings for micro-level bore concentricity, premium dual-lip skeleton oil seals, and top-tier bearings (SKF/NSK/C&U). Every unit undergoes a 100% dynamic running test (vibration, noise, temperature rise) and sealing test before export packing.

What is your MOQ, warranty policy, and do you supply test reports?

Our MOQ is 1 unit (sample order supported). All products come with a 12-month comprehensive warranty. Each shipment can be provided with full documentation, including dynamic test records, material certificates, CMM gear inspection reports, and CE/ISO compliance certificates.