The drawing is depressing. Can you tell me if the angle of the back cone is 90? Are all straight bevel gears with a back cone angle of 90 degrees?That is, the angle between the line and the large end of the gearThere are small gear end, I see a lot of information on the small end of the side of the gear there is concave in the middle, like the word "concave"But I have this picture on hand. The surface is flat. Is there any problem with the design?
The small end face of a straight bevel gear is parallel to the back cone
But there is also a direct flat down, as long as it does not affect the gear installation, work, no movement interference, no problem.
Straight bevel gears, the back cone (line) and pitch cone (also called taper) are vertical
