Spindle Speed is
RPM = (speed)/(circumference)
=(Speed)/(Pi x Diameter)
=44*1000/(3.142 x 20)
=700 RPM
7) Calculate the spindle RPM for drilling speed of 44 m/min and diameter of drill 20 mm
Answer is:
700
Explanation:
Related ISRO Technician-B Fitter Question Paper - 2016 (Set - 2) with Answer Key
Answer is:
No coolant
Explanation:
Cast iron does not require any coolant because, graphite in the cast iron acts as a lubricant.
Answer is:
Drill diameter
Explanation:
As per the Indian standard (IS) system, a drill bit is designated as 9.5-H-IS5101-HS, in this the number 9.5 stands for drill diameter.