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What are the reasons for the failure of JIS sprocket on sales?

What are the reasons for the failure of JIS sprocket on sales?

  • Categories:JIS sprocket
  • Author:
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  • Time of issue:2021-03-11
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(Summary description)For high-speed and heavy-duty gears, poor lubrication will cause local overheating of JIS sprocket on sales, resulting in discoloration, gluing and other malfunctions. There are many reasons why the lubrication is not good.

What are the reasons for the failure of JIS sprocket on sales?

(Summary description)For high-speed and heavy-duty gears, poor lubrication will cause local overheating of JIS sprocket on sales, resulting in discoloration, gluing and other malfunctions. There are many reasons why the lubrication is not good.

  • Categories:JIS sprocket
  • Author:
  • Origin:
  • Time of issue:2021-03-11
  • Views:0
Information

There are many reasons for the failure of JIS sprocket on sales, but from the analysis and statistical results of a large number of failures, the main reasons are as follows.
1. Manufacturing errors
Several typical errors, such as eccentricity, pitch deviation, shape error, pitch error, base joint error, tooth profile error, etc. Usually occurs when manufacturing JIS sprocket on sales. Eccentricity refers to the degree to which the base circle or index circle of the gear is not concentric with the rotation axis of the gear, such as a small wheel. Pitch deviation refers to the error between the actual pitch and the nominal pitch of a gear (such as a large gear). The shape error means that in the working part of the gear teeth, the distance between two theoretical involute tooth profiles can accommodate the actual tooth profile. When these errors of the gear are serious, it will rotate quickly and slowly in the gear transmission, causing shock and loud noise during meshing. Pitch error refers to the difference between any two pitches on the same circumference of the gear. Base pitch error refers to the difference between two parallel tangents of two adjacent tooth profiles with the same name on the gear. In fact, it is the tooth pitch and the nominal tooth pitch.
Second, the assembly problem
Due to factors such as assembly process and assembly method, when assembling JIS sprocket on sales, abnormal phenomena such as "one-end contact", gear axis deviation (different shafts, misalignment), gear unbalance, etc. usually occur. When a pair of meshing gear shafts are not parallel, only one end will contact in the tooth width direction. Otherwise, linear deviation of the gear will occur, which will make the load on the gear uneven in the tooth width direction and cannot smoothly transmit dynamic torque. This situation is called "one-end contact", which will cause excessive load on the part of the tooth and may cause the tooth to break.
3. Poor lubrication
For high-speed and heavy-duty gears, poor lubrication will cause local overheating of JIS sprocket on sales, resulting in discoloration, gluing and other malfunctions. There are many reasons why the lubrication is not good. In addition to the blockage of the oil passage and the oil injection hole, there are also the water ingress of the lubricating oil, the deterioration of the lubricating oil, and the high oil temperature. Will lead to poor lubrication of the tooth surface.
In summary, it is an introduction to the cause of JIS sprocket on sales failure. You can learn more about it.

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