{"id":2848,"date":"2026-04-02T08:15:11","date_gmt":"2026-04-02T08:15:11","guid":{"rendered":"https:\/\/wheelsprocket.xyz\/product\/idler-tensioner-sprocket\/"},"modified":"2026-04-03T07:59:19","modified_gmt":"2026-04-03T07:59:19","slug":"idler-tensioner-sprocket","status":"publish","type":"product","link":"https:\/\/wheelsprocket.xyz\/th\/product\/idler-tensioner-sprocket\/","title":{"rendered":"Idler & Tensioner Sprocket"},"content":{"rendered":"
\n\"Idler<\/p>\n

Technical Specifications \u2014 Idler & Tensioner Sprockets<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Chain Compatibility<\/td>\nISO 06B \u2013 20B, ANSI #35 \u2013 #80<\/td>\nPer model<\/td>\n<\/tr>\n
Mounting<\/td>\nBearing bore (pre-loaded bearing)<\/td>\n<\/td>\n<\/tr>\n
Bearing Type<\/td>\nDeep-groove ball bearing<\/td>\nSKF\/NSK equivalent<\/td>\n<\/tr>\n
Hub Style<\/td>\nPlain bore with bearing seat<\/td>\n<\/td>\n<\/tr>\n
\u0e27\u0e31\u0e2a\u0e14\u0e38<\/td>\nC45 Carbon Steel<\/td>\nSS304 option<\/td>\n<\/tr>\n
Tooth Hardness<\/td>\nHRC 45\u201355<\/td>\nModerate (idler loading)<\/td>\n<\/tr>\n
Sealing<\/td>\nSealed bearing (2Z or 2RS)<\/td>\n<\/td>\n<\/tr>\n
Max Speed<\/td>\n800 \u2013 1500 rpm<\/td>\nChain-dependent<\/td>\n<\/tr>\n
Standard<\/td>\nISO 606 \/ ANSI B29.1<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Key Features<\/h2>\n
\n
\n
<\/div>\n
\n
Precision Bearing Integration<\/div>\n
Pre-mounted sealed deep-groove ball bearings (2Z or 2RS type) provide smooth, maintenance-reduced free rotation with rated dynamic load capacity to match chain pull forces.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Chain Sag Elimination<\/div>\n
Correctly positioned idler sprockets eliminate chain sag on long centre distances, preventing chain derailment, fatigue failures, and the noise associated with loose-chain operation.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Wrap-Angle Optimisation<\/div>\n
Adding an idler increases chain wrap angle on small driving sprockets \u2014 critical in drives where the ratio exceeds 3:1 or where physical constraints limit centre distance.<\/div>\n<\/div>\n<\/div>\n
\n
\ufe0f<\/div>\n
\n
Corrosion-Resistant Option<\/div>\n
SS304 stainless idler sprockets available for food-processing and marine environments where exposure to water, salt, or cleaning agents is continuous.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Compatibility & Selection<\/h2>\n

Idler sprockets are available for ISO chain sizes 06B through 20B and ANSI sizes #35 through #80. Specify chain size, required shaft or bearing diameter, and mounting configuration (fixed shaft, adjustable bracket, or spring-loaded) when ordering. Contact our engineers<\/a> for a drive layout assessment and idler specification recommendation.<\/p>\n

Applications<\/h2>\n
\n
\n\"Agricultural<\/p>\n
\n
Agricultural Drives<\/div>\n
Multi-sprocket harvester and combine drives requiring chain guidance over long runs<\/div>\n<\/div>\n<\/div>\n
\n\"Conveyor<\/p>\n
\n
Conveyor Returns<\/div>\n
Chain return-strand guidance and tensioning in long conveyor systems<\/div>\n<\/div>\n<\/div>\n
\n\"Construction<\/p>\n
\n
Construction Equipment<\/div>\n
Wrap-angle increasing idlers on crawler-track and hoisting drives<\/div>\n<\/div>\n<\/div>\n
\n\"Mining<\/p>\n
\n
\u26cf\ufe0f Mining Conveyors<\/div>\n
Tensioning sprockets on underground conveyor chain drives<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Customer Reviews<\/h2>\n
\n
\nPhil A.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n Australia<\/span><\/div>\n
“Fitted bearing-mounted idler sprockets to our grain-elevator drive \u2014 eliminated the chain sag that was causing jump-start failures at harvest time. Excellent product.”<\/div>\n
Idler Sprocket ISO 10B-1 · March 2025<\/div>\n<\/div>\n
\n
\nNathalie V.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n France<\/span><\/div>\n
“The bearing quality is excellent \u2014 ran at 600 rpm for 2000 hours with no heating or noise. Will specify these on all future drive designs.”<\/div>\n
Idler Sprocket ISO 08B-1 Z=17 · February 2025<\/div>\n<\/div>\n
\n
\nMike T.<\/span>
\n\u2605\u2605\u2605\u2605\u2606<\/span>
\n Canada<\/span><\/div>\n
“Good product. Minor surface finish variation across units but dimensionally consistent and functionally flawless.”<\/div>\n
Idler Sprocket ANSI #50 Z=21 · January 2025<\/div>\n<\/div>\n
\n
\nSanjay P.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n India<\/span><\/div>\n
“Stainless idler sprockets for our food conveyor have survived 18 months of daily caustic wash without bearing failure \u2014 impressed.”<\/div>\n
SS304 Idler ISO 06B-1 · April 2025<\/div>\n<\/div>\n

<\/span>\u0e04\u0e33\u0e16\u0e32\u0e21\u0e17\u0e35\u0e48\u0e1e\u0e1a\u0e1a\u0e48\u0e2d\u0e22<\/h2>\n
\n\n►  How do I size an idler sprocket for my drive?<\/summary>\n
The idler sprocket must match the chain pitch exactly. Tooth count is typically 17\u201325T for idlers. The bearing bore should suit your shaft or mounting spindle diameter. Contact our engineers for a full sizing recommendation.<\/div>\n<\/details>\n
\n\n►  Should the idler sprocket be on the tight or slack side?<\/summary>\n
Idlers are almost always fitted on the slack (return) strand where chain tension is lowest \u2014 this reduces bearing loads and extends life. Tight-side idlers are only used when geometry demands it and should be specified with heavier-duty bearings.<\/div>\n<\/details>\n
\n\n►  How often should I replace the idler bearing?<\/summary>\n
Sealed bearing life under normal load is typically 8,000\u201315,000 hours. Replace when you detect noise, heating, or roughness in the bearing. Many customers replace idler sprockets as an assembly with the scheduled drive chain replacement.<\/div>\n<\/details>\n
\n\n►  Can I adjust the idler position after installation?<\/summary>\n
Yes, if you use our adjustable-bracket idler mount option. Fixed-shaft idlers are set at installation \u2014 specify your required chain-line and centre distance to ensure correct positioning.<\/div>\n<\/details>\n
\n\n►  Are stainless steel idler sprockets available for all sizes?<\/summary>\n
SS304 idler sprockets are available for ISO 06B through 16B. For other sizes or stainless bearing options, contact our sales team for lead time and pricing.<\/div>\n<\/details>\n
    \n
  1. Determine the chain sag or wrap-angle deficiency that the idler will correct \u2014 calculate required idler position.<\/li>\n
  2. Mount the idler sprocket on a fixed or adjustable shaft bracket; ensure the bearing bore is a clean fit on the shaft.<\/li>\n
  3. Align the idler tooth plane with the chain-line within 0.5 mm to prevent lateral chain loading on the bearing.<\/li>\n
  4. Set slack-strand tension: the idler should eliminate sag but not over-tension the chain.<\/li>\n
  5. Check bearing temperature after initial run: normal is less than 40\u00b0C above ambient. Investigate if higher.<\/li>\n<\/ol>\n
    ✓ ISO 9001:2015<\/span>✓ ANSI B29.1<\/span>✓ ISO\/DIN 8187<\/span>✓ JIS B 1801<\/span>✓ BS\/DIN Standards<\/span>✓ GB Standards<\/span><\/div>\n
    \n
    \n\"Ever-power<\/p>\n
    \n

    Why Choose Ever-power Australia?<\/h3>\n

    We are a vertically integrated manufacturer with over 25 years of chain drive experience. Our facility spans 35,000 m² and produces over 4 million sprockets per year. We supply OEM partners, distributors, and direct industrial buyers across Australia, with products meeting GB, ISO, ANSI, JIS, DIN and BS standards.<\/p>\n

    \nISO 9001 Certified<\/span>
    \n4M+ pcs\/year<\/span>
    \nOEM Capable<\/span>
    \nAU Stock Available<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n

    Ready to Order? Get a Free Quote Today<\/h3>\n

    Our engineering team is available 24\/7 to assist with specifications, custom designs, and volume pricing for Australian businesses.<\/p>\n

    📩 Request a Quote<\/a>
    \n 
    \n    🔍 Browse All Products<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    The Idler & Tensioner Sprocket<\/strong> is a bearing-mounted free-running sprocket<\/strong> engineered for chain tensioning, guidance, and wrap-angle optimisation in complex multi-sprocket drive systems. Available for ANSI and ISO chain series in C45 steel or stainless steel, it eliminates chain sag, prevents derailment, and extends chain and main-drive sprocket life across conveyors, agricultural machinery, and industrial drive systems.<\/p>","protected":false},"featured_media":2728,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[6693,6948,6987,6949],"product_tag":[6854,6855,6856,6852,6853],"class_list":{"0":"post-2848","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-sprockets","7":"product_cat-ansi-sprockets","8":"product_cat-idler-sprockets","9":"product_cat-iso-sprockets","10":"product_tag-bearing-mounted-sprocket","11":"product_tag-chain-guide-sprocket","12":"product_tag-chain-tension-sprocket","13":"product_tag-idler-sprocket","14":"product_tag-tensioner-sprocket","16":"first","17":"instock","18":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/product\/2848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/comments?post=2848"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/media\/2728"}],"wp:attachment":[{"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/media?parent=2848"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/product_cat?post=2848"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/th\/wp-json\/wp\/v2\/product_tag?post=2848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}