Reducer

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

KH Series Gear Reducer

The KH Series Gear Reducer is a helical-bevel gear reducer with a hollow shaft and shrink disc connection, designed for direct connection to the machine-side driven shaft. Available in KH37–KH187, the series supports right-angle drive layouts and is suitable for belt conveyors, chain conveyors, pallet conveyors, material transfer systems, hoists, lifting stations, scissor lift tables, and stacker crane drives.

Item	Value
Model	KH37–KH187
Ratio Range	5.36–197.37
Motor Power	0.12–200 kW
Output Torque	200–50,000 Nm
Mounting Type	Model-specific mounting arrangement
Output Shaft	Hollow Shaft with Shrink Disc

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Product Description

Key Technical Features & Advantages

Helical-Bevel Gear Arrangement: The KH Series uses a helical-bevel gear arrangement with a right-angle drive layout, providing a 90° transmission direction between the motor and driven equipment.
Hollow Shaft Output: The hollow shaft is designed for connection with the machine-side driven shaft, with shaft dimensions varying by KH model.
Shrink Disc Shaft Connection: A shrink discsecures the hollow shaft to the machine-side shaft. The shaft diameter and connection dimensions must match the selected model.
Consistent KH Configuration: The KH range covers KH37–KH187. The basic external arrangement remains consistent across the series, while shaft, mounting, motor, and overall dimensions vary by model size.
Model-Specific Installation Dimensions: Dimensional drawings provide the mounting and connection details needed for equipment integration, including hollow shaft dimensions, mounting dimensions, motor dimensions, and overall dimensions.

Product Design Configurations

KH Series: Helical-bevel gear reducer with hollow shaft and shrink disc
KH37–KH187: Available model range
Right-angle drive layout: Motor and driven shaft arranged at 90°

Input & Output Configurations

Output Type: Hollow shaft
Shaft Connection: Shrink disc connection
Input: Motor-driven input
Output Interface: Machine-side driven shaft connection

Mounting Styles & Options

Mounting Arrangement: Model-specific mounting configuration
Main Connection: Hollow shaft with shrink disc
Dimensional Options: Model-specific shaft, mounting, motor, and overall dimensions

Motor Options & Accessories

Motor size matched to the selected KH model
Motor mounting dimensions according to the configuration
Overall motor length according to the selected motor
Model-specific motor and reducer dimensional drawings

Primary Industrial Applications

Belt Conveyors
Chain Conveyors
Pallet Conveyors
Material Transfer Systems
Pallet Handling Equipment
Hoists
Lifting Stations
Scissor Lift Tables
Stacker Crane Travel Drives
Stacker Crane Lifting Drives

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.