{"product_id":"avt-roller","title":"AVT 3 1\/4\" Eccentric Hoistway Roller (Grey)","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eAVT 3 1\/4\" Grey Roller\u003c\/b\u003e is a high-durometer guide component used for car and counterweight stabilization. The eccentric mounting system provides a mechanical cam action for precision alignment of the elevator frame relative to the guide rails.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eCore Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"3\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eOutside Diameter (OD):\u003c\/b\u003e 3 1\/4\" (82.55mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003eTread Width:\u003c\/b\u003e 1 1\/4\" (31.75mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eBore Size:\u003c\/b\u003e 5\/8\" (15.875mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eTire Color\/Material:\u003c\/b\u003e Grey Industrial Polymer (High-Durometer)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,4,0\"\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"0\"\u003eEccentric Offset:\u003c\/b\u003e 1\/4\" (1\/2\" total adjustment range)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,5,0\"\u003e\u003cb data-path-to-node=\"3,5,0\" data-index-in-node=\"0\"\u003eHub:\u003c\/b\u003e Machined Aluminum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,6,0\"\u003e\u003cb data-path-to-node=\"3,6,0\" data-index-in-node=\"0\"\u003eBearing:\u003c\/b\u003e Precision double-sealed ball bearing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"4\"\u003e\n\u003ch3 data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003eElevator Logic\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eFrame Centering:\u003c\/b\u003e Rotation of the eccentric stud physically shifts the roller position to square the car frame and center the door vane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eRunning Clearance:\u003c\/b\u003e Used to set the \"float\" between the roller face and the rail to manage lateral movement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eVibration Damping:\u003c\/b\u003e The polymer tire absorbs rail harmonics to prevent mechanical noise from entering the cab.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"7\"\u003e\n\u003ch3 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eAccessories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eEccentric Stud:\u003c\/b\u003e 5\/8\" offset mounting bolt with hex adjustment head.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eLocking Hardware:\u003c\/b\u003e Heavy-duty nut and high-tension lock washer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,2,0\"\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eSpacers:\u003c\/b\u003e Precision shims for depth alignment within the mounting bracket.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\"\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eReplacement Tire:\u003c\/b\u003e Press-fit grey polymer tread for hub servicing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"10\"\u003e\n\u003ch3 data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eMaintenance \u0026amp; Code\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eAlignment (B44):\u003c\/b\u003e Adjust the eccentric stud to maintain code-mandated clearances. Ensure the car is checked at the tightest and widest points of the hoistway.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eTorque Spec:\u003c\/b\u003e The locking nut must be tightened (typically 45–60 ft-lbs) to prevent the eccentric from rotating under vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eDry Rail Requirement:\u003c\/b\u003e This roller must run on \u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"46\"\u003eclean, dry rails\u003c\/b\u003e. Lubrication causes skidding, which glazes the grey polymer and creates flat spots.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eBearing Inspection:\u003c\/b\u003e Check the 5\/8\" bore for play. A failed bearing or loose stud will cause the roller to wobble, leading to uneven tire wear and \"thumping.\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":48192256704664,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_d17d504b-cb08-4488-98d4-a2422ca47d35.jpg?v=1772728868","url":"https:\/\/parts4rem.ca\/products\/avt-roller","provider":"Parts4REM","version":"1.0","type":"link"}