Question

In a rolling process, thickness of a strip is reduced from 4 mm to 3 mm using 300 mm diameter rolls rotating at 100 rpm. The velocity of the strip (in m/sec) at the neutral point is

• A. 1.57
• B. 3.14
• C. 47.10
• D. 94.20

Answer 1

The correct option is A 1.57

Velocity of strip at the neutral point

$=\omega R=\frac{2\pi N}{60}\times R$

$=\frac{2\times \pi \times 100}{60}\times 0.15=1.57m/s$