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..R.. Series Gear Reducer

The R..R.. Series combines two different gear reducer types to achieve higher transmission ratios for industrial drive applications. It is suitable for conveying, material handling, automated production equipment, and other machinery requiring compact installation and reliable speed reduction.

Item	Value
Model	R..R.. Series
Ratio Range	1.3–289.74
Motor Power	0.12–160 kW
Output Torque	70–18,000 Nm
Mounting Type	Foot Mounted
Output Shaft	Solid Shaft

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Product Description

Key Technical Features & Advantages

Combined Gear Unit Design: The R..R.. series combines two different helical gear unit configurations into one transmission system, making very high reduction ratios possible.
Wide Reduction Ratio Range: With transmission ratios from 1.3 to 289.74, the series provides flexible speed reduction solutions for different industrial drive requirements.
High Output Torque: The R..R.. series can deliver output torque up to 18,000 Nm, making it suitable for applications requiring substantial driving force.
High Transmission Efficiency: Precision-machined helical gears provide efficient power transmission and smooth torque transfer.
Compact Combined Construction: The integrated two-stage combination provides high reduction capability while maintaining a practical and compact mechanical layout.
Smooth & Stable Operation: Helical gear engagement provides smooth power transmission, reduced mechanical impact, and controlled vibration during operation.
Flexible Motor Matching: Multiple motor frame sizes can be matched to the reducer according to the required input power and transmission configuration.
Robust Industrial Construction: The rigid gearbox housing, integrated mounting base, and precision gear components are designed for reliable continuous industrial operation.

Product Design Configurations

R..R.. Series: Combined helical gear reducer using two different gear unit types
R..R.. Type: Combined configuration designed to provide very high transmission ratios
Gear Arrangement: Combined helical gear transmission
Drive Layout: Motor-driven combined gearbox configuration
Housing Design: Rigid industrial gearbox housing with integrated mounting feet
Motor Frame Range: Multiple motor frame sizes available, including configurations from 63 to 225
Overall Length: Depending on the model and motor configuration, the L dimension shown in the selection table ranges approximately from 131 to 355 mm

Input & Output Configurations

Output Type: Solid output shaft
Input Configuration:
Direct motor-mounted configuration
Motor adapter connection
Different motor frame sizes according to power requirements
Customized motor/input configurations according to equipment requirements
Output Arrangement: Solid shaft output for reliable mechanical connection with driven equipment
Gear Combination: Different R-series gear units can be combined to achieve the required overall reduction ratio.

Mounting Styles & Options

Mounting Method: Foot-mounted installation
Output Shaft: Solid output shaft
Motor Connection: Motor-mounted configuration with matching motor frame sizes
Installation Orientation: Configuration can be selected according to the installation requirements of the driven machine
Mounting Options: Different housing and motor configurations are available according to application requirements

Motor Options & Accessories

Thermal protection sensors
Forced cooling fans
Mechanical brakes
Encoders
Anti-condensation heaters
Mechanical backstops
Motor adapters and mounting accessories
Customized motor configurations

Primary Industrial Applications

The wide ratio range and high torque capacity of the R..R.. series make it suitable for applications requiring low output speed, high torque, and flexible transmission ratios, including:

Conveyor Systems
Material Handling Equipment
Packaging Machinery
Automated Production Lines
Textile Machinery
Food Processing Machinery
Printing Machinery
Pumps and Fans
Lifting and Conveying Equipment
Process Machinery
General Industrial Machinery

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.

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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.
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.
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.

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.