Medium Hardened Helical Gear Reducers Parallel Shaft Single Stage 100mm to 500mm ZDZ Series

ZDZ Series Medium-Hardened Helical Gear Reducers parallel-shaft, single-stage, medium-hardened helical gear

1. Product Introduction

The ZDZ series is a parallel-shaft, single-stage, medium-hardened helical gear reducer. It is typically manufactured according to Chinese machinery industry standards (e.g., JB/T 8853-2001) and serves as a widely used standard-grade workhorse in industrial drives.

The name "ZDZ" has specific meanings:

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

• D: Stands for "Dan" (Single) Stage.

• Z: Stands for "Zhong" (Medium) hardened tooth surface (distinguishing it from "Y" for fully "Ying" or Hardened surface).

The gears are made from quality alloy steel through quenching and tempering, high-frequency induction hardening, or nitriding processes. This results in a good tooth surface hardness (typically in the range of HB300-360 or HRC45-55) and decent precision. It offers a compact design and excellent cost-effectiveness, making it suitable for applications where requirements for load capacity and precision are less extreme than those needing fully hard-faced, ground gear units.

2. Key Advantages & Features

• High Cost-Effectiveness: The manufacturing process is simpler and less costly compared to the grinding process required for hard-faced gears, making it an economical and practical choice.

• Good Load Capacity: The medium-hardened tooth surface provides better load capacity than soft-faced reducers and can handle moderate shock loads.

• High Transmission Efficiency: Single-stage efficiency can reach 96% ~ 97%, offering good energy savings.

• Compact Structure & High Versatility: Standardized and serialized design simplifies selection and interchangeability. Multiple mounting options ensure strong adaptability.

• Smooth & Reliable Operation: The helical gear design ensures smooth operation and relatively low noise levels.

3. Main Technical Parameters

• Center Distance (a): Standard sizes usually range from 100mm to 500mm (e.g., 100, 125, 150, 175, 200, 225, 250, 280, 315, 355, 400, 450, 500).

• Ratio (i): The nominal ratio range for a single stage is approximately 1.25 ~ 5.6.

• Power (P): Covers a range from a few kilowatts to several hundred kilowatts (depending on the center distance and ratio).

• Output Torque (T): Output torque ranges from several hundred Nm to tens of thousands of Nm.

• Mounting Configurations: Primarily Foot-mounted (which is also implied by the last 'Z' in 'ZDZ'), 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 ZDZ series is suitable for medium-duty applications across various industrial sectors, commonly found in:

• Conveying Equipment: Light to medium-duty belt conveyors, roller conveyors.

• Building Material Machinery: Small mixers, feeders, packaging machinery.

• General Machinery: Drives for various production lines, e.g., textile machinery, printing machinery.

• Mining Machinery: Auxiliary drives for small feeders, crushers.

• Metallurgical Industry: Auxiliary drive equipment, e.g., cooling beds, straightening machines.

• Chemical Equipment: Medium-duty agitators, mixers.