Alloy Steel Forged Gears Cylindrical Gear Reducer ZSZ Series Medium Hardened

ZSZ Series Medium-Hardened Gear Reducer alloy steel forged gears

1. Introduction

The ZSZ series reducer is a medium-hardened cylindrical gear reducer, representing a more advanced and efficient design compared to traditional soft-gear reducers like the ZZJ series. It utilizes alloy steel forged gears that are carburized and quenched or nitrided, achieving a tooth surface hardness of HRC 45-55 (medium-hard category), and then precision ground. This series features a compact structure, light weight, high load capacity, smooth transmission, and low noise. It is widely used in various heavy industries and is one of the mainstream products in modern industrial drives.

2. Key Parameters

• Models: Typically denoted by center distance and number of stages, e.g., ZSZ-160, ZSZ-180, ZSZ-200, ZSZ-224, ZSZ-250, ZSZ-280 (the number usually represents the final stage center distance or a size code).

• Transmission Stages: Primarily double and triple stage reduction.

• Ratio Range (i): Wide range. Double-stage typically from 8:1 to 50:1; triple-stage can reach 100:1 or higher.

• Center Distance: Covers multiple sizes to meet different torque output requirements.

• Input Power: Ranges from several kilowatts to hundreds of kilowatts.

• Output Torque: Provides medium to high output torque. It offers a high torque-to-weight ratio due to its compact design.

• Gear Design:

  • Tooth Profile: Involute cylindrical gears.

  • Surface Hardness: Medium-hardened (HRC 45-55), combining a tough core with a hard, wear-resistant and pitting-resistant surface.

  • Precision: High gear precision (usually up to Grade 6 per GB/T10095 or better), precision ground for low noise and vibration.

• Mounting Position: Highly flexible, including horizontal (W) and vertical (L) mounting.

• Lubrication: Usually splash lubrication.

3. Product Advantages (Compared to traditional soft-gear reducers like ZZJ)

• Compact Size & Light Weight: Offers the same load capacity as traditional soft-gear reducers in a much smaller and lighter package, saving installation space.

• High Load Capacity: The high surface hardness significantly increases the gear's contact strength and bending strength, enabling it to handle greater loads.

• High Transmission Efficiency: Precision grinding reduces friction losses. Single-stage efficiency can exceed 98%, resulting in high overall efficiency and energy savings.

• Smooth Operation & Low Noise: High-precision manufacturing and gear profile modification ensure smooth meshing and significantly reduced operational noise.

• Long Service Life: Excellent wear resistance and anti-fatigue strength greatly extend the reducer's service life.

• High Versatility: Standardized design offers good interchangeability and wide applicability across numerous industries.

4. Typical Applications

The ZSZ series medium-hardened gear reducer is suitable for almost all industrial sectors that demand reliability, efficiency, and compactness.

• Material Handling Equipment: Belt conveyors, bucket elevators, winches, travel and hoist mechanisms of various cranes.

• Metallurgical & Mining Equipment: Auxiliary drives for rolling mills (e.g., screwdown devices), straighteners, wire drawing machines, mine hoists, feeders.

• Light Industry Equipment: Paper machinery, printing machinery, plastic extruders, mixers.

• Chemical Industry Equipment: Agitators, kiln drives.

• Construction Equipment: Concrete batching plants, tower cranes.