Causes of gear fracture and tooth breakage

August 21, 2024

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The main reasons for gear fracture and broken teeth include the following:‌

‌Manufacturing error‌: There may be problems such as eccentricity, pitch deviation and tooth shape error in the gear manufacturing process. These errors will cause uneven load distribution during the operation of the gear, thereby increasing the risk of fracture.

‌Poor assembly‌: Improper gear assembly will cause the gear shaft to be non-parallel or linear deviation, so that the gear will bear uneven load during operation, resulting in fracture.

‌Poor lubrication‌: For high-speed and heavy-loaded gears, poor lubrication will cause local overheating of the tooth surface, causing color change, gluing and other faults, which may eventually lead to fracture.

‌Overload‌: In the case of overload, if there are no appropriate protection measures for the gear drive device with unstable working load, the gear tooth will be overloaded and broken or long-term overload will cause fatigue cracks.

‌Operational errors‌: Operational errors such as lack of oil, overloading, and long-term overspeeding will also cause gear damage and damage.

‌Insufficient overlap‌: The overlap reflects the ability of the gear to be continuous and stable in transmission. Insufficient overlap will cause transmission interruption and increase the risk of fracture.

‌Machining and assembly errors‌: Machining and assembly errors can cause bending stresses in the gear teeth under load, which can lead to fracture.

‌Overload and shock load‌: Short-term overload or shock load can cause the gear teeth to break suddenly.

‌Minor causes and preventive measures‌:

‌Material and manufacturing problems‌: The use of unsuitable alloys or materials, or substandard manufacturing processes, will increase the risk of fracture. It is recommended to select suitable materials and improve manufacturing processes.

‌Installation problems‌: Improper installation and adjustment can also cause gear fracture. It is recommended to ensure that the gear shaft is well aligned with other components and tighten the fixing bolts correctly.

‌Fatigue and wear‌: Long-term high-frequency reciprocating motion can cause fatigue fracture of the gear shaft. It is recommended to regularly inspect and maintain the gears to ensure proper lubrication and material quality.

‌Pitting and wear‌: Pitting and wear on the tooth surface can cause increased vibration and obvious noise in the transmission system, and eventually lead to fracture. It is recommended to increase the hardness of the tooth surface and select lubricants reasonably.

By understanding these causes and preventive measures, the risk of gear fracture and tooth breakage can be effectively reduced, and the reliability and safety of mechanical equipment can be improved.

Author:

Ms. Janice Liu

E-mail:

manage@bodamachinery.com

Phone/WhatsApp:

+86 18355529650