Overhead crane, gantry crane are essential equipment in fields of different industries such as construction, manufacturing. The crane is a combination of components to optimize the lifting and transporting the goods. However, the crane components will be worn over time like any mechanical system by the impact of the environment. The article below instructs you to identify when to replace and how to determine the condition of the crane components, ensuring your crane operates safely and efficiency.
The main girders
The cranes are overhauled oftentimes, the main girders are deflected or cracking after the repair processing need to be replaced.
The deformation and crack that deflect the main girder are mainly due to fatigue and damage. Material structure is affected by cycle shear and bending stress and the other damages, that reduce the main girder’s lifetime,
In general, the useful time of crane about 20 – 30 years. However, the usage time are is determined by the operation conditions.
10 Tons single girder is fabricated by An Thinh
Crane hook
The hook must be replaced when below signs appear
– Cracking
– Hook is worn and warped over 10% than the initial shape
– Hook’s torsional deformation over 100 or more.
– The hook shaft wear is over 5% more than the initial dimension
Crane Hook
The hook’s crucial area had to be inspected daily.
– Section B-B: affected by shear stress and wear, which reduces the cross-section area.
– C C: smallest, which are tensile by gravitation
– A A: Affected by the other forces.
Crane hook pulley
The pulley must be replaced when the below signs appear
– The pulley groove’s thickness is worn over 20% of than initial thickness.
– Radial wear at the bottom of the groove is over 50% than the rope diameter.
– The flanges are damaged seriously.
– Crack or other deflection, which make rope damage.
Rope drum
The drum has to be replaced when the below signs appear.
– The drum’s wear reaches 20% of initial wear.
– Inspect the appearance of cracking on the drum surface and shaft. The drum has to be replaced when a crack is detected.
The sign the crane wheels need replacing
– The cracking appears.
– The tread diameter is worn more than 15% of the initial.
– The flange thickness is below 50% of the initial
The Brake
– The pad thickness is below 50% of the initial
– The cracking appears on the arm and coil by the yield stress.
– High temperature or the bearing is damaged
– The coil is plastic deform.
Steel cable
Steel cable consists of a Core and wire, which are twisted together
– The broken wire is over 10% of the total wire.
– The cable is worn, and the diameter is reduced by over 40%.
– The cable is broken or the core is pushed out, which makes the structure is damaged.
– Internal cable broker.
– The cable is deformed seriously such as: plastics deform, fatigue in bend,
To ensure crane operation safety and efficiency, the operator has to inspect the components regularly.
An Thinh is a reputation crane manufacturer with advanced manufacturing equipment and a professional technical team. We distribute the crane hook, crane wheels, pulley, wipe rope drum, steel cable, grab, trolley, hoist and the other components. Contact us when you have any inquiries or demands about the crane or crane components.
An Thinh Crane and Steel Structure Co.LTD
