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Maximum Marks: 25 PARTC Descriptive answer Questions (Total 25 Marks) 16. A telescopic screw jack window opener has a sq
Posted: Mon May 02, 2022 2:56 pm
by answerhappygod
- Maximum Marks 25 Partc Descriptive Answer Questions Total 25 Marks 16 A Telescopic Screw Jack Window Opener Has A Sq 1 (26.57 KiB) Viewed 26 times
Maximum Marks: 25 PARTC Descriptive answer Questions (Total 25 Marks) 16. A telescopic screw jack window opener has a square threaded brass rod of 40 mm external diameter and 7 mm pitch. The operating nut takes the axial load of 250 N on a flat surface bearing of 50 mm internal diameter and 80 mm external diameter. If the coefficient of friction is 0.2 for all contact surfaces on the nut, determine the power required to rotate the operating nut to raise against the axial load, when the cutting speed is 4.5 m/min. (7 Marks)