Heavy Industrial Equipment Gear Reducer High Torque And Low Speed cylindrical gearbox

ZZJ series reducer heavy industrial equipment requiring high torque and low speed

1. Introduction

The ZZJ series reducer is a high-strength, high-reliability cylindrical gear reducer specifically designed for heavy industries such as metallurgy and mining. It is typically paired with a Z-series DC motor to form a "Z-series DC motor + ZZJ reducer" drive unit. This series embodies a robust and durable design philosophy, capable of withstanding extreme operating conditions including frequent starts, emergency stops, severe vibration, and impact loads. It is an ideal choice for low-speed, heavy-duty applications.

2. Key Parameters

• Models: ZZJ-350, ZZJ-400, ZZJ-500, ZZJ-650, ZZJ-750, ZZJ-850, ZZJ-1000, etc. (The number indicates the center distance in millimeters).

• Transmission Stages: Single, double, or triple stage reduction.

• Ratio Range (i): Typically covers approximately 1.25 : 1 to 20 : 1 (depending on the number of stages).

• Center Distance (a): Ranges from 350mm to 1000mm or larger, corresponding to different load capacities.

• Input Power: Wide range, from tens of kilowatts to hundreds of kilowatts to meet various power requirements.

• Output Torque: High torque output. Specific values vary by model and ratio, capable of reaching tens of thousands to hundreds of thousands of Newton-meters.

• Gear Design:

  • Tooth Profile: Involute cylindrical gears.

  • Surface Hardness: Gears are hardened and ground, ensuring high hardness, high precision, and excellent wear resistance.

• Lubrication: Usually splash lubrication or forced circulation lubrication (depending on model and size).

• Mounting Position: Horizontal mounting.

3. Product Advantages

• Exceptional Load Capacity: Features a robust housing and high-strength gears, specifically designed to handle heavy loads and shock loads.

• High Reliability: Manufactured with high-quality materials and proven processes. Key components are precision-machined and heat-treated, resulting in long service life and low failure rates.

• High Transmission Efficiency: Precision gear grinding ensures smooth meshing and high transmission efficiency, typically above 96%.

• Wide Applicability: Especially suitable for harsh environments, such as high temperature, dusty, and humid conditions.

• Strong Overload Capacity: Can withstand short-term overloads, adapting to dynamic load changes in equipment like metallurgical rolling mills.

4. Typical Applications

The ZZJ series reducer is primarily used in heavy industrial equipment requiring high torque and low speed. It is a classic configuration in traditional metallurgy.

• Metallurgical Machinery: Drives for various rolling mills (e.g., blooming mills, section mills, strip mills), straightening machines, pushers.

• Mining Machinery: Mine hoists, belt conveyors, scraper conveyors, ball mills.

• Other Heavy Industries: Material handling equipment like port cranes, ship unloaders, and large winches.