Gear And Shaft Assembly

Luoyang Yujie Industry&Trade Co., Ltd is one of the most experienced manufacturers and suppliers of gear and shaft assembly in China. Please feel free to buy cheap gear and shaft assembly for sale here from our factory. All customized products are with high quality and competitive price.

 

 

 

Gear and shaft assembly is core component in mechanical transmission systems. The shaft, as the main body for supporting and transmitting torque, is usually a cylindrical metal rod, fixed to the mechanical housing through a bearing; the gear is a disc-shaped part with gear teeth, which is installed on the shaft by means of keys, interference fits, etc. The gear teeth mesh with the gear teeth of another gear to achieve the transmission and conversion of speed and torque.

 

 

 

 

The core components of large shaft and gear assemblies include: main shaft/drive shaft, high-precision gears (spur gear/helical gear/bevel gear), bearings (self-aligning roller bearings/cross roller bearings), bushings/spacers, lock nuts/expansion sleeves, sealing rings/oil seals, and connecting parts such as keys/splines. Some are equipped with lubrication units, end covers, and locating pins to ensure transmission, positioning, sealing, and load bearing.

 

 

 

 

Contact now

 

Preparation before assembly

 

Parts cleaning and inspection:

 

Use kerosene or special cleaning agent to remove oil, burrs and machining debris from the surface of gears and shafts to ensure smooth mating surfaces.Visually inspect the gear tooth surface and shaft neck for scratches, cracks or deformation, focusing on the mating parts of the hub hole and shaft head.

 

Dimension and tolerance inspection:

 

Use micrometer and inner diameter gauge to measure the actual size of the gear hole diameter and shaft diameter, and confirm that the mating tolerance (such as interference, clearance) meets the design requirements.

Inspect the straightness of the shaft and the verticality of the gear end face to the hole. The error must be controlled within 0.01~0.05mm.

 

2. Steps of Assembly

 

Precision positioning and fixing:

 

Use tools such as positioning pins and guide sleeves to ensure the coaxiality of the gear and shaft, and use a dial indicator to monitor the assembly deviation in real time.When connecting with a key, it is necessary to ensure that the two sides of the key and the keyway fit tightly, and a gap of 0.1~0.2mm is left between the top surface and the hub groove.

 

Bearing and seal installation:

A special press sleeve should be used for bearing installation to avoid direct knocking on the rolling element; the bearing bushing should be scraped to form a uniform oil film gap.Install oil seals, O-rings and other seals to ensure that the sealing lip fits tightly with the shaft surface to prevent lubricating oil leakage.

 

3. Post-assembly inspection

Coaxiality and verticality re-inspection: Use a laser alignment instrument or dial indicator to detect the coaxiality of the gear and the shaft, with an error of no more than 0.03mm; the end face verticality error shall not exceed 0.02mm.

Tooth side clearance and meshing accuracy inspection

 

 

 

 

Wind power equipment: In the gearbox of a wind turbine, large gears are assembled with the main shaft to convert the low-speed rotation of the impeller into high-speed rotation to drive the generator to generate electricity.

 

Ship power system: The diesel engine drives the propeller through the gear shaft assembly to transmit high torque, which needs to be impact-resistant and seawater-resistant.

 

Mining machinery: In the transmission systems of crushers and ball mills, large gear shaft assemblies need to withstand heavy loads and impacts, and the material strength requirements are extremely high.

 

 

 

 

Hot Tags: gear and shaft assembly, manufacturers, supplier, factory, customized, cheap, price, in stock, for sale, Custom Large Gear Shaft, Machinery Processing, Shaft processing, Shaft used for Vessel, Shaft with groove, Wind power shaft