Answer :
The cutting speed for machining a 25.4 mm diameter bar on a lathe set at 750 RPM is 203 m/min. This is calculated using the formula: cutting speed (m/min) = (pi * diameter * RPM) / 1000.
To calculate the cutting speed, we need to use the formula: cutting speed (m/min) = (pi * diameter * RPM) / 1000. In this case, the diameter of the bar is given as 25.4 mm. To convert it to meters, we divide it by 1000, giving us 0.0254 m. The lathe is set to run at 750 RPM. By substituting these values into the formula, we get (3.14159 * 0.0254 * 750) / 1000 = 203 m/min. Therefore, the cutting speed for machining the 25.4 mm diameter bar on the lathe is 203 m/min.
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