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II) A 1 square threaded screw is 35" long between...
A square-threaded power screw with single thread is used to raise a load of 25,000 lb....
A square-threaded power screw with single thread is used to raise a load of 25,000 lb. The screw has a mean diameter of 1-in. and four threads per inch. The collar mean diameter is 1.5 in. The coefficient of friction is estimated as 0.1 for both the thread and the collar. Assume the length of thread engagement is 1.5 times the outside diameter of the screw. 1. Calculate the safety factor for the power screw to fail in torsion. Assume...
A single-square threaded 35-mm power screw is 35 mm in diameter with a pitch of 5 mm. A vertical load on the screw reac...
A single-square threaded 35-mm power screw is 35 mm in diameter with a pitch of 5 mm. A vertical load on the screw reaches a maximum of 5 kN. The coefficients of friction are 0.06 for the collar and 0.09 for the threads. The frictional diameter of the collar is 45 mm. Find the overall efficiency and the torque to "raise" and "lower" the load Repeat this problem if ACME screw is used in this design.
A single-square threaded 35-mm...
Question 1 (10 pts) A square-threaded, single thread power screw with a mean diameter of 1...
Question 1 (10 pts) A square-threaded, single thread power screw with a mean diameter of 1 in and four threads per inch is used to raise a load of 25,000 lb. The collar mean diameter is 1.5 in. The coefficient of friction is 0.1 for both the thread and the collar. Determine the following: Load 25,000 lb Q1.1. Determine the major diameter of the screw (2pts) Q1.2. Determine the screw torque required to raise the load (2pts) Q1.3. Determine the...
1. A single-threaded ACME power screw has a major diameter d=1.25 in with a pitch of...
1. A single-threaded ACME power screw has a major diameter d=1.25 in with a pitch of 0.2 in. The threaded coefficient of friction u is 0.2, and the coefficient of collar friction He is 0.15. The mean collar diameter de is 2 in. The external load on the screw is 1200 lb. Find: a) The torque required to raise the load. b) The maximum nominal shear stress of the screw body.
triple-threaded power screw is to taise/lower à 100kN load. This s square threads. Thread kinematic friction...
triple-threaded power screw is to taise/lower à 100kN load. This s square threads. Thread kinematic friction is 0.05. The loading collar has a Problem#2020pts). A 5andiameter diameter of 25cm and is a) Continuous torque required to raise the load? b) Efficiency of the system during raising the load screw has a pitch of 0.5cm and has threads using bal bearing design with a static/kinematic friction of 0.01. Determine e Considering ductile behavior with a Yield strength of 100MPa, what is...
1. An electrically driven screw-press is shown. The "load-bar" is raised or lowered via two threaded...
1. An electrically driven screw-press is shown. The "load-bar" is raised or lowered via two threaded screws supported via collar-bearings. Each screw is a 20mm diameter and 4mm in pitch with single square threaded. The collars each have an effective diameter of 30mm. The thread coefficients of friction is 0.075 and 0.095 for the screw and collar respectively. Each screw supports a load of 6kN. a) Find the torque required (per screw) to raise or lowerthe bar b) Determine if...
2. A square threaded power screw is used for a machine tool. The screw has 75 mm external diameter and 12 mm pitch. The operating nut takes the axial load of 550 N on a flat surface of 70 mm and 1...
2. A square threaded power screw is used for a machine tool. The screw has 75 mm external diameter and 12 mm pitch. The operating nut takes the axial load of 550 N on a flat surface of 70 mm and 105 mm internal and external diameters respectively If the coefficient of friction is 0.16 for all contact surfaces on the nut, determine the power required to rotate the operating nut when the cutting speed is 7.5 m/min. Also find...
Inside diameter is 1 5/8 inches IN A LARGE GATE VALVE USED IN A HIGH PRESSURE...
Inside diameter is 1 5/8 inches
IN A LARGE GATE VALVE USED IN A HIGH PRESSURE WATER LINE. THE GATE WEIGHS 1500 lb. AND FRICTION FORCE DUE TO WATER PRESSURE, RESISTING OPENING IS 500 lb THE VALVE STEM IS NON-ROTATING AND IS RAISED BY A ROTATING WHEEL WITH INTERNAL THREADS ACTING AS A ROTATING NUT ON THE VALVE STEM. THE WHEEL PRESSES AGAINST A SUPPORTING COLLAR OF 5/8 in. INSIDE DIAMETER AND 3-in OUTSIDE DIAMETER THE VALVE STEM IS FITTED...
Please solve fully and write clearly Il): A 25 inches long hot rolled AISI 1025 steel...
Please solve fully and write clearly
Il): A 25 inches long hot rolled AISI 1025 steel rod is to be subjected to an alternating bending load that will vary from a -5000 lb to +7200 lb as shown in Fig. 1. The properties of this material are given as: the ultimate tensile stress σ,-75,000 psi, the yield stress σ,-48,000 psi. Assume a theoretical stress concentration factor of K-1.65 and the notch sensitivity for this material is q-0.88. The safety factor...
I am trying to find out how to solve this redacted problem. What is the process...
I am trying to find out how to solve this redacted problem. What
is the process for finding the answers to this question? Even if
realistic numbers are used in the steps in the solution?
1. A steel wire is connected at joints A and B and looped over a lightweight pulley as shown below. It is connected in a way in which it has no slack or tension at a temperature of 23° C. The steel wire has a...
A single-square threaded 35-mm power screw is 35 mm in diameter with a pitch of 5 mm. A vertical load on the screw reaches a maximum of 5 kN. The coefficients of friction are 0.06 for the collar and 0.09 for the threads. The frictional diameter of the collar is 45 mm. Find the overall efficiency and the torque to "raise" and "lower" the load Repeat this problem if ACME screw is used in this design.
A single-square threaded 35-mm...
Question 1 (10 pts) A square-threaded, single thread power screw with a mean diameter of 1 in and four threads per inch is used to raise a load of 25,000 lb. The collar mean diameter is 1.5 in. The coefficient of friction is 0.1 for both the thread and the collar. Determine the following: Load 25,000 lb Q1.1. Determine the major diameter of the screw (2pts) Q1.2. Determine the screw torque required to raise the load (2pts) Q1.3. Determine the...
1. A single-threaded ACME power screw has a major diameter d=1.25 in with a pitch of 0.2 in. The threaded coefficient of friction u is 0.2, and the coefficient of collar friction He is 0.15. The mean collar diameter de is 2 in. The external load on the screw is 1200 lb. Find: a) The torque required to raise the load. b) The maximum nominal shear stress of the screw body.
triple-threaded power screw is to taise/lower à 100kN load. This s square threads. Thread kinematic friction is 0.05. The loading collar has a Problem#2020pts). A 5andiameter diameter of 25cm and is a) Continuous torque required to raise the load? b) Efficiency of the system during raising the load screw has a pitch of 0.5cm and has threads using bal bearing design with a static/kinematic friction of 0.01. Determine e Considering ductile behavior with a Yield strength of 100MPa, what is...
1. An electrically driven screw-press is shown. The "load-bar" is raised or lowered via two threaded screws supported via collar-bearings. Each screw is a 20mm diameter and 4mm in pitch with single square threaded. The collars each have an effective diameter of 30mm. The thread coefficients of friction is 0.075 and 0.095 for the screw and collar respectively. Each screw supports a load of 6kN. a) Find the torque required (per screw) to raise or lowerthe bar b) Determine if...
2. A square threaded power screw is used for a machine tool. The screw has 75 mm external diameter and 12 mm pitch. The operating nut takes the axial load of 550 N on a flat surface of 70 mm and 105 mm internal and external diameters respectively If the coefficient of friction is 0.16 for all contact surfaces on the nut, determine the power required to rotate the operating nut when the cutting speed is 7.5 m/min. Also find...
Inside diameter is 1 5/8 inches
IN A LARGE GATE VALVE USED IN A HIGH PRESSURE WATER LINE. THE GATE WEIGHS 1500 lb. AND FRICTION FORCE DUE TO WATER PRESSURE, RESISTING OPENING IS 500 lb THE VALVE STEM IS NON-ROTATING AND IS RAISED BY A ROTATING WHEEL WITH INTERNAL THREADS ACTING AS A ROTATING NUT ON THE VALVE STEM. THE WHEEL PRESSES AGAINST A SUPPORTING COLLAR OF 5/8 in. INSIDE DIAMETER AND 3-in OUTSIDE DIAMETER THE VALVE STEM IS FITTED...
Please solve fully and write clearly
Il): A 25 inches long hot rolled AISI 1025 steel rod is to be subjected to an alternating bending load that will vary from a -5000 lb to +7200 lb as shown in Fig. 1. The properties of this material are given as: the ultimate tensile stress σ,-75,000 psi, the yield stress σ,-48,000 psi. Assume a theoretical stress concentration factor of K-1.65 and the notch sensitivity for this material is q-0.88. The safety factor...
I am trying to find out how to solve this redacted problem. What
is the process for finding the answers to this question? Even if
realistic numbers are used in the steps in the solution?
1. A steel wire is connected at joints A and B and looped over a lightweight pulley as shown below. It is connected in a way in which it has no slack or tension at a temperature of 23° C. The steel wire has a...
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