The manufacturing accuracy of bevel gears directly affects the working performance, carrying capacity, noise and service life of the machine. Therefore, according to the use requirements of the gears, the following precision requirements are put forward for the gear transmission:
What is the difference between bevel gears and general gears
1. The rationality of the transmission backlash requires a certain amount of backlash between the non-working tooth surfaces of the meshing gear teeth, which is convenient for storing lubricating oil, compensating for elastic deformation and thermal deformation, and gear manufacturing and installation errors. 
2. The uniformity of load distribution requires good tooth surface contact when the gear is working, and a certain contact area and contact position that meets the requirements are ensured to ensure uniform load distribution and prevent stress concentration on the tooth surface and cause premature wear on the tooth surface. Thereby reducing the service life of the bevel gear.
3. The stability of the transmission movement requires that the rotation angle error of the gear in one tooth angle is within the specified range, so that the instantaneous transmission ratio of the gear pair changes little, so as to ensure the stability of the transmission and reduce vibration, impact and noise. 
4. The accuracy of the transmission movement requires that the angle error of the bevel gear in one revolution does not exceed a certain range, so that the transmission ratio of the gear pair changes little to ensure the accuracy of the transmission movement.
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