Reducer

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

SAF Series Gear Reducer

The SAF Series is a compact B5 flange-mounted helical-worm gear reducer designed for reliable and efficient power transmission. Featuring a robust cast housing, precision-machined gears, and a hollow output shaft, it provides easy direct mounting, space-saving installation, and smooth operation. With multiple frame sizes and bore options, the SAF Series is well suited for conveyors, material handling, industrial automation, and general machinery applications.

Item	Value
Model	SAF37–SAF97
Ratio Range	10.27–230.48
Motor Power	0.18–22 kW
Output Torque	Up to 4,000 Nm
Mounting Type	B5 Flange Mounted
Output Shaft	Hollow Shaft

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Product Description

Key Technical Features & Advantages

High Transmission Efficiency: Precision-machined helical-worm gearing provides efficient and reliable power transmission with smooth operation.
Compact & Robust Design: Rigid cast housing with reinforced ribs provides high strength, durability, and good vibration resistance.
B5 Flange-Mounted Design: Compact B5 flange mounting enables easy integration into machinery where installation space is limited.
Hollow Output Shaft: Direct mounting onto the driven shaft reduces the need for additional couplings and saves installation space.
Flexible Hollow Bore Options: Available in large-bore and small-bore configurations, providing flexible compatibility with different driven shaft sizes.

Product Design Configurations

SAF Series: B5 flange-mounted helical-worm gear unit with hollow shaft
SAF37–SAF97: Available frame sizes shown in the standard dimensional range
Large-Bore Configuration: Hollow output shaft with larger internal bore
Small-Bore Configuration: Hollow output shaft with smaller internal bore
Motor-Integrated Configuration: Gear unit supplied with directly coupled electric motor

Input & Output Configurations

Output Type:

Hollow shaft
Large-diameter hollow bore
Small-diameter hollow bore
Input Types:
Direct-coupled integrated electric motor
IEC standard motor configuration
Motor-adapted input configuration
Other customized input arrangements upon request
Output Connection:
Direct mounting onto driven machine shaft
Keyed hollow shaft connection
Optional output flange configurations

Mounting Styles & Options

Primary Mounting Method:

B5 flange-mounted
Installation Features:
Hollow shaft direct mounting
Compact machine-side installation
Integrated mounting feet/support structure where applicable
Multiple mounting orientations according to application requirements
Main Options:
Large-bore hollow shaft
Small-bore hollow shaft
Output flange
Customized shaft dimensions
Customized mounting configuration

Motor Options & Accessories

IEC Standard Electric Motorsfor direct integration with the SAF gear unit
Brake Motorsfor applications requiring controlled stopping and holding
Thermal Protectionsuch as PTC thermistors or thermal switches
Forced Cooling Fansfor applications requiring enhanced heat dissipation
Anti-Condensation Heatersfor high-humidity or low-temperature environments
Encoder Systemsfor applications requiring speed or position feedback
Backstops / Mechanical Holdbacksfor non-reversing drive applications
Customized Motor Specificationsaccording to voltage, frequency, protection class, insulation class, and application requirements

Primary Industrial Applications

Conveyor & Material Handling Systems
Packaging & Production Machinery
Food & Beverage Processing Equipment
Industrial Automation Systems
Agricultural & Livestock Machinery
Environmental & Wastewater Equipment
Mining & Bulk Material Handling
General Mechanical Equipment

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.