The optimum technique to transmit a force through a thrust bearing that engages an actuator and a switch is through the use of magnetic fields. A repulsive force between permanent magnet and an electromagnet will be used to displace a load of 150lbs along a shaft. The magnet will be made from iron and surrounded by 4000 turns of copper coil. As increasing current passes through the coil a magnetic field is sent through the magnet. The magnetic field flows outward from the north pole of the magnet and inwards at its south pole. The actuating element in the system is a permanent magnet so the outward magnetic field from the magnetic power source and the inward field of the actuator at its south pole causes a repulsive force that displaces the actuator and bearing vertically along the shaft. Bearing #AXK3953.5 from the ESI Bearing Distribution with a bore size of 1.53in, an outer diameter of 2.106 and a width of 0.098in will be used in the prototype. The most important feature of the bearing is its width and material composition of stainless steel type 403. Its thickness will not interfere with the magnetic field from the power source or actuator allowing for displacement in the system. The system will be placed in a housing that was designed to resist 150lbs of rotating load. The housing will be composed of stainless steel type 403 since this material is strong and can withstand rotational loadings. To achieve the rotation in the system a DC electric motor will be inserted on the top of the housing. While the design is in production in the spring further research will be done on the system due to new performance specifications presented to the team by the sponsor. The sponsor has requested for the system to withstand a greater load. The option of using a super-conductive material instead of copper to transmit current around the magnet is now under consideration. A super-conductive material allows for more current to pass, as the current increases so does the magnets repulsive force. The larger the force the greater the load the magnet can displace.
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