Gear mechanism and method for manufacturing gear mechanism

A method for manufacturing a gear mechanism, the gear mechanism comprising a gear shaped to have:

• a bottom land;
• a first tooth flank connected to the bottom land;
• a second tooth flank connected to the bottom land;
• a first tooth face connected to the first tooth flank;
• and
• a second tooth face connected to the second tooth flank,
• wherein the bottom land is curved,
• a radius of curvature of the first tooth flank is greater than a radius of curvature of the second tooth flank, and
• parts of the first tooth flank and the second tooth flank connected to connection points with the bottom land are curved such that a distance of each of the parts from a shaft center of the gear decreases toward the connection points and that a gradient of each of the parts decreases toward the connection points,
• the method comprising:
• forming the bottom land, the first tooth flank, the second tooth flank, a first temporal tooth face and a second temporal tooth face;
• and
• carrying out a step of forming the first tooth face by processing the first temporal tooth face and a step of forming the second tooth face by processing the second temporal tooth face, wherein
• the first temporal tooth face and the second temporal tooth face are cut such that a distance from the shaft center of the gear to a cutting start point at a side of the first temporal tooth face and a distance from the shaft center of the gear to a cutting start point at a side of the second temporal tooth face are equal.