{"id":4894,"date":"2020-11-06T18:46:51","date_gmt":"2020-11-07T00:46:51","guid":{"rendered":"https:\/\/ddmgaragedoors.com\/blog\/?p=4894"},"modified":"2023-06-23T15:08:26","modified_gmt":"2023-06-23T21:08:26","slug":"liftmaster-model-j-drive-components","status":"publish","type":"post","link":"https:\/\/ddmgaragedoors.com\/blog\/2020\/11\/06\/liftmaster-model-j-drive-components\/","title":{"rendered":"LiftMaster Model J Drive Components"},"content":{"rendered":"\n<p>One of the more common <a href=\"https:\/\/ddmgaragedoors.com\/parts\/liftmaster-commercial-operators.html\">LiftMaster operators<\/a> is the jackshaft operator. The operator transfers energy as torque power from the motor to the counterbalance shaft in order to open a sectional overhead door. When the counterbalance shaft turns, it opens or closes the door. In this video, we will trace the torque as it moves from the LiftMaster operator&#8217;s motor to the door.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"LiftMaster Model J Drive Components\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/zA1-Aeee5d8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\"><strong>In this video, you can see how the mechanical drive components of a LiftMaster Model J operator work.<\/strong><\/figcaption><\/figure>\n\n\n\n<p>The torque power begins with the motor drive shaft. Secured to this is the small pulley that moves the v-belt. This belt then transfers torque to the clutch pulley, which we explain <a href=\"https:\/\/www.youtube.com\/watch?v=MGfKvGRxPgk\">in this video<\/a>. In order to allow for slippage, only pressure plates secure the clutch pulley to the <a href=\"https:\/\/ddmgaragedoors.com\/blog\/2022\/12\/31\/how-commercial-operator-clutches-work\/\">clutch assembly<\/a>.  The shaft goes through the operator frame to the other side, where washers and a ring clip hold it in place. <\/p>\n\n\n\n<p>Inside the operator frame is a series of sprockets and chains to reduce the operator speed and increase the torque. This assembly transfers torque from the lower clutch shaft to the upper driveshaft. On the right side of the operator, a chain connects the driveshaft to the limit shaft. While the driveshaft turns, limit shaft tells the operator how far the door has opened or closed.<\/p>\n\n\n\n<p>The driveshaft goes through the operator frame to the other side, where a sprocket is secured to the shaft. As the sprocket turns, the drive chain turns the torsion shaft sprocket which is secured to the counterbalance shaft. This in turn opens and closes the door when the motor is running.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"265\" height=\"350\" src=\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/11\/liftmaster-commercial-operators.jpg\" alt=\"\" class=\"wp-image-4915\" srcset=\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/11\/liftmaster-commercial-operators.jpg 265w, https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/11\/liftmaster-commercial-operators-227x300.jpg 227w\" sizes=\"auto, (max-width: 265px) 100vw, 265px\" \/><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/ddmgaragedoors.com\/parts\/part\/OCOM-JCPSU-LM.html\">LiftMaster Model J Operator<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n<p>If you need assistance with installing a jackshaft operator, please watch our YouTube video titled, &#8220;<a href=\"https:\/\/youtu.be\/IzfqlcfpwB0\">How to Install LiftMaster Jackshaft Operators<\/a>.&#8221; We also have a blog post with tips on <a href=\"https:\/\/ddmgaragedoors.com\/blog\/2023\/01\/07\/how-to-set-the-clutch-on-a-commercial-jackshaft-operator\/\">how to set the clutch on a jackshaft operator<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the more common LiftMaster operators is the jackshaft operator. The operator transfers energy as torque power from the motor to the counterbalance shaft in order to open a sectional overhead door. When the counterbalance shaft turns, it opens or closes the door. In this video, we will trace the torque as it moves [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[247,5],"tags":[4046,4043,3986,4979],"class_list":["post-4894","post","type-post","status-publish","format-standard","hentry","category-products","category-technical-support","tag-clutches","tag-commercial-operators","tag-liftmaster","tag-shafts"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v25.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LiftMaster Model J Drive Components - DDM Garage Doors Blog<\/title>\n<meta name=\"description\" content=\"This blog discusses how torque moves through the LiftMaster Model J drive components, starting at the motor.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ddmgaragedoors.com\/blog\/2020\/11\/06\/liftmaster-model-j-drive-components\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LiftMaster Model J Drive Components\" \/>\n<meta property=\"og:description\" content=\"This blog discusses how torque moves through the LiftMaster Model J drive components, starting at the motor.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ddmgaragedoors.com\/blog\/2020\/11\/06\/liftmaster-model-j-drive-components\/\" \/>\n<meta property=\"og:site_name\" content=\"DDM Garage Doors Blog\" \/>\n<meta property=\"article:published_time\" content=\"2020-11-07T00:46:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-23T21:08:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/11\/liftmaster-commercial-operators.jpg\" \/>\n<meta name=\"author\" content=\"Dan Musick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dan Musick\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/11\/06\/liftmaster-model-j-drive-components\/\",\"url\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/11\/06\/liftmaster-model-j-drive-components\/\",\"name\":\"LiftMaster Model J Drive Components - 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