{"id":5005,"date":"2021-11-08T12:53:08","date_gmt":"2021-11-08T18:53:08","guid":{"rendered":"https:\/\/ddmgaragedoors.com\/blog\/?p=5005"},"modified":"2023-07-06T16:13:16","modified_gmt":"2023-07-06T22:13:16","slug":"allister-allstar-raynor-black-sprockets","status":"publish","type":"post","link":"https:\/\/ddmgaragedoors.com\/blog\/2021\/11\/08\/allister-allstar-raynor-black-sprockets\/","title":{"rendered":"Allister, Allstar & Raynor Sprockets"},"content":{"rendered":"\n

The old Allister and Allstar<\/a> openers use two black sprockets. The one above the motorhead moves to activate the limit switches as the limit dogs reach their shut-off points.<\/p>\n\n\n\n

\"An<\/a>
Allstar Model 6500 Garage Door Opener<\/strong><\/figcaption><\/figure>\n\n\n\n

The one above the garage door acts as an idler. Raynor<\/a> also used similar black sprockets just for idlers above the door.<\/p>\n\n\n\n

\"horizontal<\/a>
Allister Black Idler Sprocket Pictured Above the Garage Door<\/strong><\/figcaption><\/figure>\n\n\n\n

Over the years the chains stretch and loosen. As a result, the pitch of the chain breaks the teeth on the sprocket. In order to prevent this problem, Allstar stopped producing the black sprockets and replaced them with black pulleys. <\/p>\n\n\n\n

\"Another<\/a>
Allstar Black Idler Pulley at the End of the Opener Rail Above the Garage Door<\/strong><\/figcaption><\/figure>\n\n\n\n

In 2021 Allstar quit selling parts for their openers, so now we carry a white idler pulley<\/a> that has a similar shape as the black pulley. The outside diameter is 2 1\/2 inches, and the bolt hole for securing the pulley to the end bracket is 1\/2 inch. These pulleys don\u2019t break when the chain loosens.<\/p>\n\n\n\n

\"The<\/a>
Replacement Idler Pulley for Allister and Raynor Sprockets<\/strong><\/figcaption><\/figure>\n\n\n\n

If the sprocket above the door breaks, you can replace the black sprocket with the pulley. However, if the sprocket above the motorhead breaks, you will need to get a new opener<\/a>. Those sprockets are no longer available.<\/p>\n","protected":false},"excerpt":{"rendered":"

The old Allister and Allstar openers use two black sprockets. The one above the motorhead moves to activate the limit switches as the limit dogs reach their shut-off points. The one above the garage door acts as an idler. Raynor also used similar black sprockets just for idlers above the door. Over the years the […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[246,247],"tags":[405,5022,5021],"class_list":["post-5005","post","type-post","status-publish","format-standard","hentry","category-history","category-products","tag-garage-door-parts","tag-manufacturers","tag-residential-opener"],"yoast_head":"\nAllister, Allstar & Raynor Sprockets - DDM Garage Doors Blog<\/title>\n<meta name=\"description\" content=\"Garage door makers used to use black sprockets in their openers. 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