Electric Crab Hoist Application

The QDX Electric Crab Hoist is a heavy-duty lifting unit designed for double girder overhead cranes. It is designed according to the latest national standard GB/T3811 "Design specifications for cranes", and with reference to European FEM standard, has the features of lightweight, modular design, and advanced manufacturing process. It combines a compact trolley frame, wire rope hoisting mechanism, and integrated traveling system into one unit. You will often see this hoist used in steel plants, fabrication workshops, power stations, and large warehouses. It is built for medium to high duty cycles where stable lifting, precise positioning, and long service life are required. Whether you are lifting steel coils, machine parts, or heavy structures, this hoist provides controlled and safe operation.

dual-rail-electric-wire-rope-hoist

What Is A QDX Electric Crab Hoist?

A QDX Electric Crab Hoist is a trolley-type wire rope hoisting unit mounted on rails of a double girder crane.

Unlike standard electric hoists, the QDX model is designed as a separate hoisting trolley (crab unit). It includes:

  • Hoisting mechanism (motor + reducer + drum)
  • Trolley traveling mechanism
  • Steel structure frame
  • Electrical control system

This design allows the hoist to travel smoothly along crane girders, while lifting heavy loads with high stability.

It is commonly used in:

  • Double girder overhead cranes
  • Heavy-duty gantry cranes
  • Steel plants and fabrication workshops
  • Warehouses handling large equipment

Motor Options

Option A: Co-axial design of drum and lifting motor makes the structure compact and reasonable.
Option B: Compact C-design structure significantly increases the lifting height which effectively reduces the height of the plant.

QDX Electric Crab Hoist

Technical Parameters

Capacity (Kg) Working grade FEM Working grade IOS Lifting height (m) Lifting speed (m/min) Travelling speed
(m/min)
3.2T 2m M5 6/9/12/15/18 0-5.0 0-20
3.2T 2m M5 6/9/12/15/18 0-8.0 0-20
5T 2m M5 6/9/12/15/18 0-5.0 0-20
5T 2m M5 6/9/12/15/18 0-8.0 0-20
8T 2m M5 6/9/12/15/18 0-4.0 0-20
8T 2m M5 6/9/12/15/18 0-4.5 0-20
10T 2m M5 6/9/12/15/18 0-4.0 0-20
10T 2m M5 6/9/12/15/18 0-4.5 0-20
12.5T 2m M5 6/9/12/15/18 0-4.0 0-20
12.5T 2m M5 6/9/12/15/18 0-5.0 0-20
16T 2m M5 6/9/12/15/18 0-4.4 0-20
16T 2m M5 6/9/12/15/18 0-5.0 0-20
20T 2m M5 6/9/12/15/18 0-3.5 0-20
20T 2m M5 6/9/12/15/18 0-5.0 0-20
25T 2m M5 6/9/12/15/18 0-2.8 0-20
25T 2m M5 6/9/12/15/18 0-3.8 0-20
32T 2m M5 6/9/12/15/18 0-2.8 0-20
32T 2m M5 6/9/12/15/18 0-3.8 0-20
50T 2m M5 6/9/12/15/18 0-3.0 0-20
50T 2m M5 6/9/12/15/18 0-4.0 0-20
50T 2m M5 6/9/12/15/18 0-5.0 0-20
63T 1Am M4 6/9/12/15/18 0-3.0 0-20
63T 1Am M4 6/9/12/15/18 0-4.0 0-20
80T 1Am M4 6/9/12/15/18 0-2.5 0-20

Structure Of QDX Electric Crab Hoist

The QDX electric trolley features a compact and efficient design, specifically designed for use with bridge cranes. Each component plays a clear role in lifting, traveling, and controlling loads safely.

1. Hoisting Mechanism

The lifting mechanism is the core component of the QDX and is responsible for lifting and lowering operations. It uses a high-efficiency motor to provide strong and stable power, and is transmitted through a reinforced reducer to ensure smooth torque output and long service life. Wire rope reels controllably wind and release the wire rope, allowing the load to move smoothly and vertically.

2. Trolley Traveling Mechanism

The trolley traveling mechanism allows the hoist to move horizontally along the crane beam, giving you flexibility in material handling. It is driven by a motor and gearbox system that ensures stable and controlled movement. The trolley runs on durable steel wheels, which provide good grip and long service life even under frequent use. The design focuses on smooth travel with low vibration, which helps protect both the load and the crane structure. This system makes it easier for you to position materials accurately, improving work efficiency and reducing the risk of handling errors.

3. Frame Structure

The frame structure forms the backbone of the QDX Electric Crab Hoist and supports all key components. It is usually made from welded steel plates or a box-type structure, which provides high strength and stability. This design offers strong load-bearing capacity, allowing the hoist to handle heavy loads without compromising safety. The structure is also resistant to deformation, even under continuous or demanding working conditions.

4. Electrical Control System

The QDX Electric Crab Hoist is operated by the electrical control system, which also provides you with a variety of control options. Relays, contactors, and a control panel are among the components that guarantee reliable and secure electrical operation. If you want more energy economy and smoother speed control, you can add a variable frequency drive. For easy operation, you can utilize a pendant control; for greater versatility, you can use a wireless remote. You can accurately regulate lifting and transportation with this device, increasing workplace productivity and safety.

How to make an inquiry on the electric crab hoist?

Crab hoist parameters

Please include the following information in the inquiry message form or in your inquiry email, we will send our quotation according your requirements.

  • Lifting capacity: ____ ton
  • Lifting height (H):____ m
  • Rail gauge (K): ____ m
  • Power supply: ____V ____Hz ____Phase

Why Choose Yuantai Crane?

Give you multiple returns

Yuantai's crane products have currently served more than 150 countries around the world, and have created wealth for customers that is several times the price of the crane machine, and it is still going on.

Professional, worry-free and time-saving

Professional and customized crane solutions can better match customers' working conditions. High-quality crane products make customers more assured and worry-free when use.

Product life cycle service

Our services run through all aspects of product design, production, installation and spare parts support. Taking customers as the center and taking high-quality products as the core carrier, realize the service concept of customers buying with confidence and using them with confidence.

How to get quotation?

Overhead & Gantry Crane

  • Lifting capacity:
  • Lifting height:
  • Span:
  • Voltage(e.g. 220V 60Hz 3Phase):
  • Working conditions:

Jib Crane Inquiry

  • Lifting capacity:
  • Lifting height:
  • Arm length:
  • Voltage(e.g. 220V 60Hz 3Phase):
  • Working conditions:

Hoist Inquiry

  • Lifting capacity:
  • Lifting height:
  • Voltage(e.g. 220V 60Hz 3Phase):
  • Working conditions:

Send us your RFQ including the parameters above, we will reply our quotation accordingly.