Reducer

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

R Series Helical Gear Reducer

The S Series Helical-Worm Gear Reducer / Gearmotor is one of the four globally recognized modular industrial gearbox families (R, K, F, and S). Combining a high-speed helical gear input stage with a heavy-duty worm gear output stage, the S series is specifically engineered for drive applications requiring a 90-degree right-angle layout, large reduction ratios, ultra-quiet running, and high cost-effectiveness.
Parameter Technical Specifications
Model R17 – 167
Gear Ratio 1.3 – 289.74
Input Power 0.12 – 160 kW
Output Torque 70 – 18,000 Nm

Product Description

Key Technical Features & Advantages

  • High Transmission Efficiency: Precision-ground hardened helical gears deliver transmission efficiencies of 96% to 98% per stage, minimizing energy consumption and operational heat build-up.

  • High Power Density & Rigid Construction: The housing is cast from high-grade gray cast iron (HT200/HT250) optimized by finite element analysis, delivering high structural rigidity to withstand heavy shock loads and continuous torque output.

  • Coaxial Inline Drive Layout: The input shaft and output shaft share the same centerline, enabling direct, streamlined power transfer ideal for inline conveyors and compact machinery envelopes.

  • Low Vibration & Quiet Running: Precision case-carburizing, quenching, and CNC tooth profile grinding ensure gear accuracy beyond DIN Class 6, resulting in smooth, silent power transmission.

  • Modular Dimensional Interchangeability: Frame dimensions, shaft center heights, and mounting interfaces adhere strictly to international modular standards, providing 100% seamless drop-in replacement for mainstream European brands (e.g., SEW equivalents).

Product Design Configurations

  • R.. Series: Foot-mounted helical gear reducer

  • RF.. Series: Flange-mounted helical gear reducer

  • R..DF Series: Foot-and-flange mounted helical gear reducer (Limited to R17-R107 frame sizes)

  • RX.. Series: Foot-mounted single-stage helical gear reducer

  • RXF.. Series: Flange-mounted single-stage helical gear reducer

Input & Output Configurations

  • Output Type: Solid shaft

  • Input Types:

    • Direct-coupled integrated electric motor

    • Standard IEC motor adapter

    • Servomotor input adapter

    • Solid input shaft extension

Mounting Styles & Options

  • Mounting Methods: Foot-mounted / Flange-mounted

  • Main Options: Output flanges

Motor Options & Accessories

  • PTC thermistors and thermostat sensors (Thermal overload protection)

  • Forced cooling auxiliary fans (Independent cooling)

  • Mechanical holding/safety brakes

  • Optical/magnetic encoders (Incremental Sin/Cos, single-turn absolute, multi-turn absolute)

  • Anti-condensation space heaters

  • Mechanical backstops (Holdbacks for non-reversing drives)

Primary Industrial Applications

  • Marine & Shipbuilding Machinery

  • Lithium Battery Manufacturing & Energy Lines

  • Oil & Gas Drilling Equipment

  • Environmental Protection & Wastewater Plants

  • Coal Mining & Heavy Bulk Extraction

  • Subsea Optical Cable Laying Machinery

  • Livestock & Agricultural Feeding Automation

Our Core Strengths

Smart Warehousing & Global Delivery
Smart Warehousing & Global Delivery
Modern Manufacturing Facility
Modern Manufacturing Facility
High-Precision Inspection
High-Precision Inspection
Full-Range Gearbox Solutions
Full-Range Gearbox Solutions

Standardized Production Process Flow

  1. 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.

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    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.

  3. 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.

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    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.

  5. 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.

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    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.

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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.

Global logistics and shipping
Packing photo Packing photo Packing photo

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.

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