Reducer

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

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R..SZ..AD.. Series Gear Reducer

The R..SZ..AD.. series is an input-shaft version of the R series gear reducer, equipped with an external input shaft instead of direct motor mounting. It offers flexible connection with external motors, couplings, belts, or chains, and is suitable for conveyors, material handling equipment, packaging machinery, feeding systems, mixers, processing equipment, lifting systems, and automated production lines.

Item	Value
Model	R..SZ37-177AD1-8
Ratio Range	1.3–289.74
Input Power	0.12–160 kW
Output Torque	70–18,000 Nm
Mounting Type	Foot Mounted
Input Type	Input Shaft
Output Shaft	Solid Shaft

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Product Description

Key Technical Features & Advantages

Helical Gear Transmission: The R..SZ..AD.. series is based on the R series gear reducer design, providing efficient and stable power transmission for industrial drive applications.
Input Shaft Configuration: The AD type replaces the direct motor connection with an input shaft, allowing the reducer to be driven by an external transmission system.
Solid Shaft Transmission: The shaft configuration provides a reliable mechanical connection for industrial machinery and transmission components.
Inline Drive Layout: The input and output shafts are arranged in an inline configuration, making the reducer suitable for conventional horizontal transmission layouts.
Compact Gear Housing: The integrated cast housing provides a rigid structure while maintaining a relatively compact installation footprint.
Stable & Smooth Operation: Precision gear transmission and rigid housing construction support smooth power transfer with controlled vibration and operating noise.
Flexible Drive Integration: The input-shaft design allows connection with different external drive arrangements instead of requiring direct motor mounting.
Multiple Frame Sizes: The R..SZ series covers multiple frame sizes from SZ37 through R.SZ177, supporting a wide range of industrial drive requirements.
Multiple Mounting Dimensions: The AD1–AD8 configurationsprovide different dimensional arrangements for adapting the reducer to various installation requirements.

Product Design Configurations

R..SZ..AD.. Series: R series gear reducer with external input-shaft configuration
R..SZ37 – R..SZ177: Multiple frame sizes for different transmission requirements
AD1 – AD8: Different input-shaft dimensional configurations according to the selected frame size
Gear Arrangement: R series inline gear transmission
Housing Design: Heavy-duty cast gear housing with integrated mounting structure
Drive Layout: Inline input and output shaft arrangement
Input Configuration: External input shaft instead of direct motor connection

Input & Output Configurations

Input Type:
External solid input shaft
Input shaft connected to an external drive source
Suitable for coupling, belt, chain, or other transmission arrangements where applicable
Output Type:
Solid output shaft configuration
Mechanical connection to driven machinery
Motor Connection:
No direct motor flange connection required for the AD input-shaft configuration
External motor and transmission system can be arranged separately
Shaft Arrangement:
Inline shaft configuration
Input and output shafts positioned along the same transmission axis

Mounting Styles & Options

Mounting Method: Foot-mounted housing configuration according to the R series mounting arrangement
Input Shaft: External input shaft with AD dimensional configuration
Output Shaft: Solid output shaft
Frame Sizes: R.SZ37, R.SZ47/57, R.SZ77, R.SZ87, R.SZ97, R.SZ107, R.SZ137/147 and R.SZ167/177
Input Shaft Options: AD1–AD8 according to the selected reducer size
Installation Dimensions: Shaft diameter, flange dimensions, mounting dimensions and other parameters vary according to frame size and AD configuration

Motor Options & Accessories

Because the R..SZ..AD.. type uses an input shaft rather than a directly mounted motor, the motor can be installed separately and connected through an appropriate transmission arrangement.

Available system accessories may include:

Flexible couplings
Shaft couplings
Belt and pulley drive components
Chain and sprocket transmission components
Motor mounting structures
Protective shaft covers
Mechanical brakes
Forced cooling systems
Thermal protection devices
Backstops
Other customized transmission accessories

Primary Industrial Applications

Conveyor Systems
Material Handling Equipment
Packaging Machinery
Feeding Machinery
Mixing and Agitation Equipment
Material Processing Machinery
Industrial Transmission Systems
Production Line Equipment
Warehouse and Logistics Systems
General Industrial Machinery
Machinery Requiring Separate Motor and Gearbox Installation
Equipment Using Coupling, Belt or Chain Drive Systems

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.