Single Stage Hardened Helical Parallel Shaft Gear Reducers 80mm To 500mm Center Distance ZDY Series

ZDY Series Hardened Helical Gear Reducers parallel-shaft, single-stage, hardened helical gear

1. Product Introduction

The ZDY series is a parallel-shaft, single-stage, hardened helical gear reducer. It is a fundamental series specified in the Chinese machinery industry standard (JB/T8853-2001) and is one of the most widely used hardened gear reducers.

The name "ZDY" has standardized meanings:

• Z: Stands for "Zhu" (Cylindrical) Gear.

• D: Stands for "Dan" (Single) Stage.

• Y: Stands for "Ying" (Hardened) Tooth Surface.

The gears are meticulously manufactured from high-quality alloy steel (e.g., 20CrMnTi) through carburizing, quenching, and grinding processes. This results in high tooth surface hardness (HRC58-62) and high gear precision (Grade 6 per GB/T10095). Its core design objectives are to achieve compact size, high torque output, high reliability, and long service life, making it the "standard component" and "workhorse" in modern industrial drives.

2. Key Advantages & Features

• Extremely High Load Capacity: The hardened and ground gears significantly increase the surface contact fatigue strength and tooth root bending fatigue strength, enabling it to handle heavy loads and shock loads.

• High Transmission Efficiency: Single-stage efficiency can be as high as 98% or more, offering remarkable energy savings and low operating costs.

• Long Service Life: Precision manufacturing and high-quality bearings ensure a long operational life even under harsh conditions.

• Smooth Operation & Low Noise: The helical gear design and grinding process guarantee smooth power transmission with minimal vibration and noise.

• Compact Structure & Small Size: For the same output torque, its size is much smaller than that of soft-faced reducers, saving installation space.

• High Versatility: Standardized and serialized design ensures good interchangeability, easy selection, and maintenance.

3. Main Technical Parameters

• Center Distance (a): Standard sizes range from 80mm to 500mm (e.g., 80, 100, 125, 160, 200, 250, 280, 315, 355, 400, 450, 500). This is the core parameter of the ZDY series.

• Ratio (i): Nominal ratio range is 1.25 ~ 6.3 (single-stage). Common ratios include 1.25, 1.4, 1.6, 1.8, 2.0, 2.24, 2.5, 2.8, 3.15, 3.55, 4.0, 4.5, 5.0, 5.6, 6.3, etc.

• Power (P): Covers a wide range, from approximately 4 kW to 3000 kW (specific power depends on center distance and ratio).

• Output Torque (T): Output torque ranges from a few kNm to about 100 kNm (e.g., models with a 500mm center distance can achieve a maximum output torque of over 100 kNm).

• Mounting Configurations: Primarily Foot-mounted (horizontal), but other forms like flange mounting are also available.

(Note: The above parameters are typical ranges. Exact values must be confirmed with the official selection guide from the manufacturer.)

4. Typical Applications

The ZDY series reducer is an indispensable power transmission device in heavy industries, widely used in:

• Conveying Equipment: Belt conveyors, bucket elevators, scraper conveyors.

• Metallurgical Machinery: Rolling mills, straightening machines, continuous casting machines.

• Mining Machinery: Crushers, ball mills, vibrating screens.

• Chemical Equipment: Large agitators, reactors, extruders.

• Building Material Industry: Cement mills, rotary kilns, tube mills.

• Port Machinery: Stackers and reclaimers, ship loaders, car unloaders.

• Power Industry: Coal pulverizers, coal feeders.