Single Girder Overhead Cranes

• Designed with more reasonable and reliable structure, higher strength steel as a whole

• Small dimension, light  weight, dependable and optimum performance and no pollution

• Easy handling and operation, little noise, few faults and highly improved cost-effectiveness

• Energy-conservation, environment protection, low maintenance and higher working efficiency

• Small and light wheel load, low-sway load is controlled and positioned  easily and exactly

• Low consumption of power reduces the costs, and excellent exchange ability for components

• Safe, powerful,  reliable, durable and affordable, longer utility life-span, and service life

• Favourable travel characteristics and minimum wear of crane runway and travel wheels

• Travel limit switches which reduces harmful loading on end stops and unnecessary load swing

• Wide selection of operational speeds, to highly meet customers’ different  requirements

• Designed in accordance with international standard, DIN, FEM, ISO and conform to JB/T1306-94

• One year warranty is the most  important commitment, which we can provide to our customers

• Sub-assembly characteristic are tested before assembly, providing absolute safe to workers

• Optimised headroom via main girder connection variants make the operation become compact

Capacity                                                    1Ton-20Ton
Span                                                           7.5-31.5m
Standard Lift                                              6 m
Use                                                              Lifting Up/Down, Traversing Left/Right
Drive Mode                                                 Motor
Class Insulation                                         F
Working Class                                           A3-A5  
Work Moisture                                           <85%
Sling Type                                                  Wire Rope or Chain
Operation                                                   Pendant control, remote control or cabin control (driver's room, open or closed type)
Contact Continuity                                   40%ED
Power Supply                                           220v-660v, 50/60 Hz, 3 phase, single or dual voltage
Ambient Temperature                              -20~40℃
Control Voltage                                         24v, 36v, 42v, 48v, 110v
Crane Driving                                            IP55
H.S. Code                                                  84261120
Package                                                    Plywood case (girder and end truck are packed by rain-proof plastic, electric hoist and all other things are packed by firm wooden case or crates and plywood cases)

            Single girder overhead cranes are light small lifting overhead cranes or bridge cranes with two-side connection/both ends in the cement column or metal  bracket shaped like a bridge, which suspended from the workshop, warehouse etc and  travel under I-section or H-section steel beams. The bridge is laid along the track on both sides of the viaduct, so that they can make full use of the space under the bridge to lift the material without the hindrance of the ground equipment. Single girder overhead cranes consist of main bridge girder (single), end truck, electric hoist and electric system to help move heavy loads for 3 directions: Up-Down, Left-Right, Forward-Backward. Single  girder overhead cranes are designed to assist with a wide range of lifting tasks and moving operations which will contribute to your daily  productivity and overall success and proved to be a powerful and reliable solution for assorted industries while serving multiple applications in a diverse set of environments. They are the most popular, pragmatic and cost efficient lifting cranes (light duty track traveling crane).

           The main role of single girder overhead cranes is timely and safely complete the object  displacement by intermittent and cycle work, with electric trolley or other  means of lift devices such as grab or electromagnet. They are important tools and equipments for  material handling to achieve mechanization and automation. They also have the functions of reducingthe burden on workers during modern industrial production process, improving labor productivity and efficiency, saving the cost of the workshop. Besides, they have become indispensable lifting  production to a certain extent and suit the tailor-made requirements of customers.

           Using high-quality components can reduce failure rate and maintenance costs. The system benefits from a travelling motor gear box ensuring that the motor starts quietly and smoothly whilst offering 1 or 2  travelling speeds and variable travelling speeds. Latching devices allow direct transfer of the  hoist trolley between the crane and a suspension monorail, flexible connections  between the crane girder and end carriages enable single-girder cranes to operate on tracts that are not parallel. There are also top running end-carriages that  feature direct drive wheels, rubber buffers and the end carriages are fastened  with a plate bolted onto the girder. Lifting mechanism,  trolley and crane can be controlled independently and work synchronously or individually. Various parameters tested to ensure strong construction, smooth operation and high load bearing capacity. Besides, safe slide wire/cable provides high conductivity and small voltage drop power, current collector slide speed is swift.

           Our single girder overhead cranes also come standard with travel  limit switches,  they feature maximum rigidity and minimum deadweight. This maximizes crane  runway loading and enables a more cost-effective building design and overall  system solution. And environment which requires  special used crane instead. Ramhoist crane packages are pre-engineered,  complete crane component packages utilizing cutting edge  technology. Plug-in cabling and bolted structural connections simplify assembly. What’s more, there are normal headroom (general type, also called LD type) and low headroom (European type) for both Top Running Single  Girder Cranes and Under Running Single Girder Cranes.

           Due to their various main girder connection variant, the single girder overhead cranes are applicable to transfer, assembly, check and repair as well as load and unload various materials in the various indoor and outdoor environment such as factory, plant, warehouse, stockyard, mine, machinery manufacturing, concrete industry, assembly repair, production workshop, garage, metallurgical steelmaking field, petroleum, petrochemicals, ship building, electric power, paper making, railway  transportation construction field, civil aviation, port/harbor and logistics  turnover etc, especially for the applications that require precise positioning of the material handing, large parts and precision assembly, even in buildings  with low ceilings. However, this type of single girder overhead cranes are banned to be used in some dangerous environment, such as, combustible/  flammable, explosive, or corrosive gas

1. Bridge Girder | Main Girder
           Horizontal beam of the crane bridge for hoist traversing is linked and supported by the end trucks.The frame of crane beam is either no-weld U-shape for general type (normal headroom) with one stop molding rolled beams and channels, or square box frame for europen type (low headroom) with rolled section (enclosed computer-optimised box-section), torsion resistant welded diaphragm plate for reinforced connection and have non-destructive test. Both are simplified open kind design and with tight, robust, solid, rational and high strength/rigidity structure by Q235 or Q345  steel plate (similar with foreign steel plate Fe3 or Fe52)  and with advanced technology, outstanding design, auto production, best grade and premium material which pass shot blasting ensures high efficiency and low  noise operations. Low deadweight reduces investment layout, it has smaller body  to get more lifting space and optimal/best use of the room under the bridge.
         European type is different structure and main girder is box type. The advantages are reducing itself height, to some extent increasing the crane lifting height, while general type means the main girder is normal U-shape.

European  type

General type

2.Bolting and Welding
           Main girder and end girder adopts bolted connection to ensure strength, they are manufactured under the guidance of our experts who strictly follow the norms of industry at every stage and use modern machines and crane buffer block  is included.
           In view of important welding seam and stress is more  than tension weld of 70% allowance stress, conducting fault detection check and  take out 5% weld length by ultrasonic test. Inspection report provided to user.

3.Painting
         All steel  is treated by sand blasting before doing paintings, there are 3 layers of paintings and the bottom layer is epoxy zinc painting to prevent from rusting. It has beautiful outlook and lustre for a long service life after Primer and finishing painting. Color is according to your demands and average thickness is about 100 microns and should be average on surface.

4.Electric Hoists
           They are the lifting mechanisms/components of the cranes with  single or double lifting speed of normal headroom or low headroom  (close headroom/short headroom) designed to maximize available height (vertical  clearance) and assure maximum hook travel as well as they also minimize the beam-to-hook distance, which all travels along the bridge. 
           The hoists are mounted on the main  girder for crane lifting, there are two basic types of hoists. One is wire rope  hoist which is very durable and will provide long term, reliable usage, and the  other type is chain hoist which used for lower capacity, lighter duty  applications and for projects in which cost is a primary deciding factor.
           For wire rope hoist, there are CD1 model, MD1 model, HC model, Europe type electric hoist, variable frequency  drives on both hoist and trolley is available, in china, with CD1 and MD1 electric hoist also called LD type single girder overhead crane which is the most popular crane in developing countries since it is much cheaper than with Europe mode hoist.
         The trolley and crane adopt three-trinity driving mechanism, frequency stepless speed regulating, hard-tooth surface, disc brake. Main traveling mechanism adopts soft start cage motor. Shrouded DSL system for trolley power feeding, smooth and quiet operation. Its traveling speed can be designed dual-speed and frequency control or other types of speed.

5.Motor
         The cross and long traveling motor with thermal protection and currency protection, has soft start function, and motor protection class is IP54. It is F class insulation and equipped with overload protection equipment. (optional)

6.Overload Protection/Load-limiting Device/ Overload Limiter
           If the material is over the capacity, the crane will give a sharp warning for protection itself.

7.Emergency Brake
           If the operation staff encounter some emergency situation, we could start the emergency brake/stop system to protection the related treasure.

8.Electric protection
           The electric protection consist of short circuit protection, circuit self-check protector, lose phase protection, phase control relay, circuit flow phase lack protection, low-voltage  protection, power failure protection, over current protection, thermal protection of electric motors, sound and light signaling/alarm devices/ siren light. All these protections have the same function of making sure our products’ safety and security.

9.End Trucks | End Carriages | End  Beams
           Located on either side of the span in cement column or metal bracket, the end trucks with gear motors house the wheels on which the entire crane travels. There are two sets of end trucks and gearboxes for one set of single girder overhead crane, specially designed gearbox adopts oblique gears and self lubrication.
           European type: End beam is a tubular type, adopt good quality parts. Especially European wheel group is a key component of such parts.
           General type: General crane end beam by splicing.

European type                      

General  type

10.Limit Switch
         Our single girder overhead cranes equipped with many different limit switches, like mechanical limit switch, two-position switches for hook lifting and lowering mechanisms, cross bar limit switches which  include height limit, rail end stop limit for traveling and long traveling limit switch.

11.Wheels
           These wheels travel on the runway  beam allowing access to the entire length of the bay.
           Wheels of highly wear-resistant  spheroidal-graphite cast iron include wheel bearing, wheel, bearing box, and  bearing. The material is ZG430-640 high strength cast steel, 60#, 65Mn, 42CrMo,  45# or according to your demands.

12.Bearing
         Bearing is deep groove ball bearing and bearing friction coefficient is small, high speed limit. It is an important  part in wheel. Bridge crane wheel assembly are technically advanced and  successfully used in different industries.

13.Shaft
         High-quality shaft is an essential  component of end trucks’ wheels.

14.Inverter
           Inverter from famous brand such as ABB can make lifting and traveling in any speed you want specifically for your work.

15.Electric control box
         Standard is CHINT, Shihlin, Schneider,  Yaskawa. ABB electric elements and the protective grade of electric  control box shall not less than IP54-- insulation class is normally IP55,  movable control box that moves along the crane and is independent from the  hoist. Control stick could be connected with trolley, freely move on main girder separately and can also control the travelling speed according to the different depth of buttons.

16.Nonpolar speed  adjustment control
          Nonpolar speed adjustment control (Electric contactless module speed regulation controlling  for travelling) which result in stable travelling and small sway of crane. Radio control and predicative maintenance device options available. Optional radio control with power and signal transmission via energy chain system, it with display and proportional pushbuttons.

17.Festoon
         One electric festoon system running  the length of the bridge beam. Power supply to the crab by means of highly  flexible flat cable with protective earth conductor. Cable is hung on the coil  holder for hoist power supply, normal we equipped flat type cable, also have explosion-proof type.

18.Pendant Control
         Pendant control and cable with quick-connect plug, and control pendant suspended for separate travel on the crane girder with display for installation monitoring.

19.Hook
         High quality hook can completely make the load assignments become more safe and reliable.

20.Control Panel
         Control panel with variable frequency drives for both bridge and trolley, is sealed and IP 55 protected which has 3 optional: cabin with joystick panel, wireless control panel or pendent control panel.

21.Cabin
           There are full field of view cabin suspend under the main girder. There are joint control desk or single control box packed within the cabin, assemble the sidelong ladder between the cabin and moving table.

Others
1.Warning
           People without driving license or after drinking shall not be allowed to operate and the operation must be  focused, not talking, smoking or doing anything unrelated, the crane is not allowed to use overload.

2.Maintenance Precautions
           First, need to regulate the operation, certificate posts; Second, regular maintenance, add lubricants, to ensure that the machine can be normal, safe operation; Third, to comply with  the “ten hanging” criteria, prohibit overload and to lift people. Through the normal operation of the crane, reasonable maintenance, can reduce the crane  failure, to ensure the normal operation of the machine and extend the service  life.

3.Two Different types

  ①Top Running Single Girder Cranes | Top Rider Single Girder | Single Girder Top Running Overhead Cranes | Top Running Bridge | Single Girder Top Running  Bridge Crane (SGTR)

The top riding single girder cranes  are similar to the top rider double girder crane. Top running overhead cranes are much heavier than under hung equipment. For top-running systems, the end trucks are supported on rails, which are attached to the top of the crane runway.  Besides, as the best and efficient lifting solution in large coverage facility,  top running overhead crane or bridge crane can be designed in both single girder, double or  box girder, there are enough options to suit your demands.

   ②Under Running Single Girder Cranes | Underhung Bridge Cranes | Single Girder Motorized Underhung Cranes | Underhung motorized bridge cranes |  Underhung hoist overhead crane | Single Girder Underhung Bridge Crane (SGUH)

Under Running Single Girder Cranes offer excellent side approach and are the excellent choice applying to works and storehouses where it is ≥100 mm height between the rail surface and the rafter of roof truss.

4.European type overhead crane VS General type overhead crane
           European type equipped with low headroom hoist/trolley and more advanced on structure design. Compared with general type overhead crane, the limiting distance is minimum from hook to wall, and headroom is the lowest and minimum, which makes cranes work more close to the front. The net height is lowest, can maximum the lift height and highest possible hook position can be achieved, which increases effective working space of workplace. European single girder overhead crane is compact lifting machinery designed and manufacturing in the strict according  with FEM, DIN and ICE standard. Compared with general overhead crane (bridge crane), the weight is reduced by about 15-30% of common crane, max wheel pressure is reduced by about 10-30%. Lifting height is reduced by about 20%-25%, and hook limit is smaller so the working space is bigger.
           Optimum utilisation of the available height  and space thanks to compact travelling hoist design and large hook path, thus reduce construction and operating costs. The crane is very expedient equipment  for material handling in little production divisions and where there headroom is very low.

5.Low-energy & free-maintenance
           With German motor, the total power can be  20% lower than normal crane, save energy. Composite transmission mechanism has less mid device, the efficiency can be higher. Frequency control speed, the can  be low-high speed 1:10, which will improve the working efficiency with more than 20%. Free maintenance and easy maintenance design will reduce the maintenance cost for you. Components which are imported from abroad, the break down rate is very low and will reduce your cost when using the crane.

6.Intelligentized
           Safety monitor, which is called the crane black box, it will record every operating.
           Electrical anti-swaying system, which can help the crane working with precise position control.

Quotation for single girder overhead crane 10T-S6m, H8m

Quotation for single girder overhead crane 10T-S9.5m, H5.5m and 10T-S12m, H5.5m

Quotation for top running single girder overhead crane 10T-S12m, H6m with Electric wire rope hoist

Quotation for top running single girder overhead crane 10T-S12m, H6m with Electric chain hoist

Quotation for under running single girder overhead crane 10T-S12m, H6m with Electric wire rope hoist

Quotation for under running single girder overhead crane 10T-S12m, H6m with Electric chain hoist

Looking for a single girder overhead crane approx 7.5m wide with 20ton capacity from U.S. (with customer reference list)

Specifications