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Mechanical Engineering - Machine Design - Discussion

Discussion Forum : Machine Design - Section 8 (Q.No. 27)
Machine Design
27.
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as
T sec3 φ
T sec2 φ
T/sec3 φ
T cosec φ
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Mech said:   6 years ago
The formative or equivalent number of teeth for a helical gear may be defined as the number of teeth that can be generated on the surface of a cylinder having a radius equal to the radius of curvature at a point at the tip of the minor axis of an ellipse obtained by taking a section of the gear in the normal plane. Mathematically, a formative or equivalent number of teeth on a helical gear,

T sec3 φ.
Shanjeevkumar said:   9 years ago
Can anyone explain me?
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