Stepside

12-31-2012, 12:20 PM

This is not a question on how I am going to produce a Bevel Gear , but rather a question of tooth form.

I am aware of involute gear cutters and that they are of different shape depending upon the tooth count.

My assumption is the cutters are proportional as the Diametral Pitch changes. That is to say, for example, a # 4 cutter will have the same geometric shape whether it is a 24 DP or a 5 DP cutter.

My second assumption is based on the first one. The tooth shape of a Bevel Gear remains the same but its size diminishes as it proceeds toward the point that defines the apex of the cone.

The last assumption would be that the tooth shape, actually the space between the teeth, would be at 90 degrees to a line from the Pitch Circle to the apex of the cone.

Are these assumptions correct?

Am I missing some information that would help with answering my question?

Thanks in advance

Have a Safe and productive New Year

Pete

I am aware of involute gear cutters and that they are of different shape depending upon the tooth count.

My assumption is the cutters are proportional as the Diametral Pitch changes. That is to say, for example, a # 4 cutter will have the same geometric shape whether it is a 24 DP or a 5 DP cutter.

My second assumption is based on the first one. The tooth shape of a Bevel Gear remains the same but its size diminishes as it proceeds toward the point that defines the apex of the cone.

The last assumption would be that the tooth shape, actually the space between the teeth, would be at 90 degrees to a line from the Pitch Circle to the apex of the cone.

Are these assumptions correct?

Am I missing some information that would help with answering my question?

Thanks in advance

Have a Safe and productive New Year

Pete