{"product_id":"gal-car-door-roller","title":"GAL 3-1\/4\" Gray Nylon Car Door Roller","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eGAL 3-1\/4\" Gray Nylon Roller\u003c\/b\u003e is a high-durability door hanger roller designed specifically for \u003cb data-path-to-node=\"1\" data-index-in-node=\"99\"\u003eGAL\u003c\/b\u003e door equipment. Unlike polyurethane versions, the \u003cb data-path-to-node=\"1\" data-index-in-node=\"153\"\u003eGray Nylon\u003c\/b\u003e construction is significantly harder, providing lower rolling resistance and higher resistance to \"flat-spotting\" when doors remain in the open or closed position for extended periods.\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\"\u003eManufacturer:\u003c\/b\u003e GAL Manufacturing\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\"\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=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eTread Width:\u003c\/b\u003e 11\/16\" (17.46mm)\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\"\u003eBore \/ Internal Diameter (ID):\u003c\/b\u003e 0.6693\" (17mm) — Precision 6203 series bearing.\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\"\u003eTire Material:\u003c\/b\u003e Reinforced Gray Nylon (High-Durometer)\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 Material:\u003c\/b\u003e Integrated Nylon (Single-piece construction)\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\"\u003eShaft Type:\u003c\/b\u003e Concentric (Fixed) mounting stud.\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\"\u003eDoor Suspension:\u003c\/b\u003e These rollers support the dead weight of the car door panels on the header track.\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\"\u003eDeformation Resistance:\u003c\/b\u003e The Gray Nylon material is chosen for heavy doors or high-traffic units because it does not compress under load, ensuring the door starts moving instantly without the \"thump\" of a flattened tire.\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\"\u003eLow Friction:\u003c\/b\u003e The hardness of the nylon reduces the \"drag\" on the door operator motor, allowing for consistent opening and closing speeds across millions of cycles.\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\"\u003eConcentric Mounting Stud:\u003c\/b\u003e The fixed 17mm threaded shaft (included) used to bolt the roller to the hanger bracket.\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\"\u003eEccentric Version (GAL 3-1\/4\" Eccentric):\u003c\/b\u003e The companion roller used for adjusting the door height and squaring the panel to the strike or return.\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\"\u003eUpthrust Roller:\u003c\/b\u003e A smaller (typically 2\" or 2-1\/4\") roller mounted beneath the track to prevent the door panel from being lifted off the header.\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\"\u003eGAL Header Track:\u003c\/b\u003e The specific inverted-V or C-channel track designed for 3-1\/4\" rollers.\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\"\u003eCSA B44 Door Kinetic Energy:\u003c\/b\u003e Per \u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"33\"\u003eCanadian Code (B44)\u003c\/b\u003e, door closing force and kinetic energy must be strictly limited. If these nylon rollers become \"flat-spotted\" or the 17mm bearings seize, the increased friction can cause the door operator to exceed code-mandated torque limits.\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\"\u003eBearing Inspection:\u003c\/b\u003e Check for side-play in the 0.6693\" bore. Because the nylon is harder than polyurethane, a failing bearing will transmit more noise directly into the car station.\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\"\u003eTrack Cleanliness:\u003c\/b\u003e High-durometer nylon is sensitive to debris. If there is grit in the track, the nylon will not \"absorb\" it like rubber; instead, it will \"hop\" over it, potentially damaging the bearing races.\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\"\u003eLubrication Prohibition:\u003c\/b\u003e Do \u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"28\"\u003enot\u003c\/b\u003e lubricate the nylon tire or the track. Nylon is self-lubricating on steel; adding grease will only attract dust, creating an abrasive paste that will wear down the 11\/16\" tread width.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":47731815284888,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_527bc3cf-298c-452c-afe7-4a5058a41005.jpg?v=1772731714","url":"https:\/\/parts4rem.ca\/products\/gal-car-door-roller","provider":"Parts4REM","version":"1.0","type":"link"}