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The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

A. $$\frac{{0.75}}{{0.75 + \sqrt {\text{v}} }}$$

B. $$\frac{3}{{3 + {\text{v}}}}$$

C. $$\frac{{4.5}}{{4.5 + {\text{v}}}}$$

D. $$\frac{6}{{6 + {\text{v}}}}$$

Answer: Option A


This Question Belongs to Mechanical Engineering >> Machine Design

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Comments ( 3 )

  1. Vinay Singh
    Vinay Singh :
    3 years ago

    4.5/4.5+ v for careful cutting of gear and it's velocity up to 12.5 m/s.
    6/6+v for accurate and velocity 20 m/s 0.75/0.75+v for precision and velocity up to 20 m/s (0.75/1+v )+ 0.25 for non metal gears.

  2. KAUSHAL KUMAR
    KAUSHAL KUMAR :
    4 years ago

    Velocity factor.

    3/(3+v): v

  3. Madhavan Palmani
    Madhavan Palmani :
    4 years ago

    For mettalic D is the Correct answer.
    No metallica option a is correct

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