Reducer

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

KHF Series Gear Reducer

The KHF Series Gear Reducer is a K Series gear unit with a B5 flange-mounted design, hollow shaft, and shrink disk connection. Its right-angle layout supports compact equipment integration and direct connection to the driven shaft. Available in KHF37–KHF157 sizes, it is suitable for conveyors, material handling, packaging, and production line equipment.

Item	Value
Model	KHF37–KHF157
Ratio Range	5.36–197.37
Input Power	0.12–200 kW
Output Torque	200–50,000 Nm
Mounting Type	B5 Flange-Mounted
Output Shaft	Hollow Shaft with Shrink Disk

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Product Description

Key Technical Features & Advantages

K Series Gear Reducer Structure: The KHF series is based on the K Series gear unit and is configured for flange-mounted installation with a hollow shaft.
B5 Flange-Mounted Design: The KHF type uses a B5 flange-mounted structure for integration with the machine-side mounting arrangement.
Hollow Shaft Output: The hollow shaft provides a direct mechanical interface with the driven machine shaft.
Shrink Disk Connection: The shrink disk connects the hollow shaft to the machine-side shaft and forms part of the output connection arrangement.
Right-Angle Drive Layout: The K Series configuration provides a right-angle transmission arrangement for equipment layouts where the drive and driven shaft positions require this configuration.
Multiple Housing Sizes: The KHF37–KHF157 range covers multiple reducer sizes, with external and installation dimensions varying by model.
Model-Specific Dimensional Drawings: The KHF37–KHF157 technical drawing provides the dimensions required for reviewing shaft, flange, housing, motor, and installation arrangements.

Product Design Configurations

KHF Series: B5 flange-mounted K Series gear reducer with hollow shaft and shrink disk
KHF37–KHF157: Multiple frame sizes for different equipment and installation requirements
Gear Arrangement: K Series gear transmission
Drive Layout: Right-angle transmission
External Structure: Similar basic arrangement across the KHF37–KHF157 range, with dimensions varying by model size

Input & Output Configurations

Output Type: Hollow shaft
Output Connection: Hollow shaft with shrink disk
Input Type: Motor-driven input arrangement
Driven Shaft Connection: Machine-side shaft connected through the hollow shaft and shrink disk

Mounting Styles & Options

Mounting Method: B5 flange-mounted
Output Shaft: Hollow shaft
Shaft Connection: Shrink disk
Installation Dimensions: Model-specific flange, shaft, housing, motor, and overall dimensions
Model Range: KHF37, KHF47, KHF57, KHF67, KHF77, KHF87, KHF97, KHF107, KHF127, and KHF157

Motor Options & Accessories

Motor size and related installation dimensions according to the selected KHF model
Motor mounting and connection dimensions
Hollow shaft and shrink disk connection components
Flange mounting components
Model-specific installation components according to equipment requirements

Primary Industrial Applications

Conveyor Systems
Material Handling Equipment
Material Transfer Equipment
Packaging Machinery
Production Line Machinery
Feeding Machinery
Rotary and Transfer Equipment
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.