{"product_id":"rotary-limit-switch-20-5-1-series-55-gear-ratio-with-2-contact-blocks-hubbell-55-4e-2sp-wr-20","title":"Rotary Limit Switch- 20.5:1 Series 55 Gear Ratio With 2 Contact Blocks Hubbell 55-4E-2SP-WR-20","description":"\u003cp\u003e\u003cstrong\u003eAlso Known As :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThey are commonly used for controlling machinery as part of a control system, acting as safety interlocks, or to count objects passing a point.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eAbout :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Hubbell 55-4E-2SP-WR-20, if a valid model, seems to be a particular type of limit switch with specified features, which is a type of switch operated by the motion of a machine part or the presence of an object.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eCommon Applications: :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 55: Might refer to the series or model number.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 4E: This could indicate a specific feature or variant within the series.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 2SP: Might denote that there are 2 set points, or it could refer to some other feature like the type of contacts or mounting options.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eStandards:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• WR: This often stands for \"Water Resistant,\" indicating that the switch is designed to resist water ingress, making it suitable for certain outdoor or wet environments.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 20: This could be another specific identifier, or perhaps it could refer to a rating or other specification. It's not clear without additional context.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 20.5:1 Gear Ratio: Indicates the mechanical advantage offered by the gearing mechanism inside the limit switch, i.e., for every 20.5 rotations of the input shaft, the output shaft completes one rotation.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 2 Contact Blocks: Indicates that the limit switch includes two separate contact blocks for electrical connections, which might be used for different functions or redundancies.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eConstruction :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Consists of springs, levers, and other components that transfer the motion of the actuator to the contacts.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Made of materials that offer durability and reliability over many operating cycles\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Options to mount the limit switch in place, which could include flanges, brackets, or holes for screws\/bolts.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• These are the points where the switch connects to the electrical circuit. They can be screw terminals, quick connect terminals, or cable glands.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eSpecification :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Width - 5-1\/3 in \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Depth - 5-1\/3 in\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Height - 3-1\/3 in \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Gear Ratio - 20.5:1 \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Color - Gray \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Support Type - Base Mount \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Capacity - 15 Amps. \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Material - Die-cast Aluminum \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Number of Shelves - Each \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Package Quantity - 1 \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Manufacturers Part Number - 55-4E-2SP-WR-20 5\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Normally Closed - 2 \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Normally Open - 2 \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Brand - Hubbell \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• NEMA Class - 4\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eFeatures :\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Industrial Machinery: To detect the presence or position of objects or parts.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Safety Interlocks: To ensure that dangerous machinery is powered down when access doors are opened.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Position Detection: In elevators, doors, gates, etc., to detect the open or closed position.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Installation: The switches should be installed according to the manufacturer's specifications and guidelines, considering the environmental and operational conditions.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Maintenance: Regular maintenance checks to ensure that the switch is operating effectively and safely. It may include cleaning, inspection, and testing.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Voltage and Current: Indicates the maximum voltage and current that the switch is rated for. Exceeding these ratings can cause failure or unsafe conditions.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e","brand":"Global Industrial","offers":[{"title":"Default Title","offer_id":44017282875546,"sku":"55-4E-2SP-WR-20","price":684.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0213\/7895\/7412\/files\/1_87fe8901-46f0-479a-b3ba-3c70c9727f26.png?v=1762982570","url":"https:\/\/nassaunationalcable.com\/products\/rotary-limit-switch-20-5-1-series-55-gear-ratio-with-2-contact-blocks-hubbell-55-4e-2sp-wr-20","provider":"NassauNationalCable","version":"1.0","type":"link"}