Gear Reducer

Type: QY315 (hard tooth surface standard series)

Rated output torque: 12,000–200,000 N·m

Rated input power: 15–800kW

Working temperature: -20℃ ~ +45℃

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Overview

Features

PARAMETER

Application

Overview

The crane gear reducer is a key transmission device for lifting equipment. It is mainly used to convert the high-speed rotation of the motor into a low-speed high-torque output to meet the power requirements of lifting, running and luffing mechanisms. It is characterized by compact structure, high load-bearing capacity, and smooth transmission. It is suitable for frequent start-stop and heavy-load conditions. Common gear reducers include parallel shaft gear reducers, coaxial reducers, and planetary gear reducers, etc., which can be selected according to the working environment and load requirements of the crane.

Features

As the core transmission component of lifting machinery, the performance characteristics of crane gear reducer are mainly reflected in the following aspects:

Hard tooth surface design

Material: 20CrMnTi/17CrNiMo6 alloy steel Process: carburizing and quenching (tooth surface hardness 58-62 HRC) + precision grinding (ISO level 6 accuracy) Advantages: Strong impact resistance, lifespan of 20,000+ hours (under rated working conditions).

Modular structure

Supports multi-stage transmission (2-3-stage helical gear/herringbone gear + optional planetary stage) Flexible installation forms: base type, flange type (I/II type), hollow shaft set type.

Efficient lubrication system

Standard splash lubrication, optional forced circulation lubrication (high power/high speed model) Sealing solution: double-lip skeleton oil seal + labyrinth seal, IP55 protection level.

Customized services

Accurately match parameters according to crane tonnage, speed and working level.

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PARAMETER

Parameter item	Value/range
Series model	QY315 (hard tooth surface standard series)
Applicable institutions	Lifting mechanism/cart operating mechanism
Rated output torque (T₂N)	12,000–200,000 N·m
Rated input power (P₁)	15–800 kW
Transmission ratio (i)	10–450
Service Factor (SF)	1.25（M6）–1.6（M8）
Center distance (a)	160–800mm
Input/output shaft form	Solid shaft + flat key/hollow shaft + shrink disk
net weight	300–5,000 kg
Lubricating oil consumption	8–150 L
working temperature	-20℃ ~ +45℃
Protection level	IP55 (standard)

Note: The above is the general range of QY series, and the actual parameters need to be customized according to specific needs (such as:

Lifting mechanism: Need to match the lifting capacity (tons), lifting speed (m/min), and pulley group magnification.
Running mechanism: wheel pressure, running resistance, acceleration need to be calculated.

Application

The Gear Reducers are usually used in conjunction with overhead cranes, gantry cranes, jib cranes and electric hoists, and are widely used in the following scenarios: