{"title":"Coupling Pins \u0026 Rubbers","description":"\u003ch2\u003ePin \u0026amp; Bush Coupling Quick Reference\u003c\/h2\u003e\n\u003cp\u003ePin and bush couplings transmit torque through cylindrical pins engaging rubber-bushed bores on the opposite hub. The rubber bushes are the FLEXIBLE element — absorbing shock + vibration, accommodating minor misalignment. Selection turns on the COUPLING SIZE (matched to the original coupling part number) and the REPLACEMENT COMPONENT (pin OR rubber bush, both wear independently).\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eWhen to Replace\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoupling Pins (Driving)\u003c\/td\u003e\n\u003ctd\u003eHardened steel — turned + ground\u003c\/td\u003e\n\u003ctd\u003eWhen pin shows wear flats or deformation against rubber bush\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRubber Bushes (NBR \/ EPDM)\u003c\/td\u003e\n\u003ctd\u003eNBR for oil\/hydrocarbon, EPDM for water\/chemical\u003c\/td\u003e\n\u003ctd\u003eWhen bushes show cracking, hardening, or excessive radial play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Sleeves \/ Wear Sleeves\u003c\/td\u003e\n\u003ctd\u003eBronze or hardened steel\u003c\/td\u003e\n\u003ctd\u003eOptional for high-cycle applications — replaceable wear element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoupling Hubs (Driving + Driven)\u003c\/td\u003e\n\u003ctd\u003eCast iron \/ steel\u003c\/td\u003e\n\u003ctd\u003eRare — only on catastrophic damage or worn pin holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSelection Rules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMatch REPLACEMENT pins + bushes to the ORIGINAL coupling part number (KCP, Falk, Lovejoy, etc.)\u003c\/li\u003e\n\u003cli\u003eReplace pins + bushes as a SET — mixing new with worn creates uneven load distribution\u003c\/li\u003e\n\u003cli\u003eInspect coupling alignment when replacing — misalignment causes bush wear and is the root cause if you've replaced bushes more than once in 2 years\u003c\/li\u003e\n\u003cli\u003eFor NEW couplings, see \u003ca href=\"\/en-nz\/collections\/couplings-and-shaft-collars\"\u003eshaft couplings \u0026amp; collars\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor complete pin and bush coupling background and selection guidance, see our \u003ca href=\"\/en-nz\/blogs\/product-guides\/flexible-coupling-guide\"\u003eflexible coupling guide\u003c\/a\u003e. Companion ranges: \u003ca href=\"\/en-nz\/collections\/couplings-and-shaft-collars\"\u003ecouplings \u0026amp; shaft collars\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/rubber-bushes\"\u003erubber bushes\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/clevis-pins\"\u003eclevis pins\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/spring-pins\"\u003espring pins\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eCoupling Pins \u0026amp; Rubbers\u003c\/h2\u003e\n\u003cp\u003ePin and bush flexible couplings transmit torque through a set of cylindrical pins on one hub that engage with rubber-bushed bores on the opposite hub. The rubber bushes are the flexible element — they allow minor angular and parallel misalignment between shafts and absorb shock and vibration in the drive train. Pin and bush couplings are a durable, well-proven design widely used on pumps, compressors, conveyors, and general industrial drives. AIMS Industrial supplies replacement pins and rubber bushes for pin and bush couplings.\u003c\/p\u003e\n\n\u003ch3\u003eHow Pin and Bush Couplings Work\u003c\/h3\u003e\n\u003cp\u003eThe driving hub carries a set of turned steel pins, equally spaced on a bolt circle. Each pin engages a corresponding rubber bush pressed into a bore in the driven hub. Under torque, the rubber bushes deflect slightly, transmitting load from pin to hub while damping shock and absorbing the minor shaft misalignment that occurs in real installations. The rubber's compliance is the coupling's flexibility — stiffer rubber transmits higher torque but provides less damping; softer rubber provides better shock absorption at lower torque capacity.\u003c\/p\u003e\n\n\u003ch3\u003eWear and Replacement\u003c\/h3\u003e\n\u003cp\u003eThe rubber bushes are the wear components in pin and bush couplings. Failure modes include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression set:\u003c\/strong\u003e The rubber permanently deforms and no longer provides adequate compliance, increasing transmitted vibration and shock to the drive train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCracking and splitting:\u003c\/strong\u003e Particularly in oil-contaminated environments or when the rubber has hardened from age or heat exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBush ejection:\u003c\/strong\u003e Under sustained overload or severe misalignment, bushes can be ejected from their bores. This leaves the pins running in the bare bore, causing rapid hub wear and complete coupling failure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePins should also be inspected during maintenance. Worn or damaged pins should be replaced along with the bushes — running new rubber on worn pins shortens the life of the new components.\u003c\/p\u003e\n\n\u003ch3\u003eSizing and Identification\u003c\/h3\u003e\n\u003cp\u003ePin and bush couplings are dimensionally defined by the coupling size designation, which specifies the pin diameter, bolt circle, and bush dimensions. The coupling size is stamped on the hub or specified in the equipment manual. When ordering replacement components, provide the coupling size or hub dimensions.\u003c\/p\u003e\n\n\u003ch3\u003eMisalignment and Bush Life\u003c\/h3\u003e\n\u003cp\u003eExcessive shaft misalignment accelerates rubber bush wear significantly. If pin and bush rubbers are wearing out faster than expected, the shaft alignment of the drive should be checked before replacement — correcting alignment extends the life of the new components and reduces transmitted vibration to the driven equipment. Angular and parallel misalignment both contribute to bush fatigue; on flexible coupled drives, alignment should be verified with a dial indicator after installation and periodically as part of the maintenance schedule. For help identifying the correct pins and rubbers for your coupling, \u003ca href=\"\/en-nz\/pages\/contact-us\"\u003econtact our team\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"cone-ring-pin-nut","title":"Cone Ring Pin \u0026 Nut","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Pin \u0026amp; Nut\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Pin \u0026amp; Nut\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eIndustrial duty product\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eCone Ring Pin \u0026amp; Nut: industrial product for Australian plant duty. Refer to product specifications for full details.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Finer Power Transmissions","offers":[{"title":"KX30-42 Coupling","offer_id":49316735877397,"sku":"A0112421","price":8.26,"currency_code":"AUD","in_stock":true},{"title":"KX48-70 Coupling","offer_id":49316735910165,"sku":"A0112422","price":13.76,"currency_code":"AUD","in_stock":true},{"title":"KX75-105 Coupling","offer_id":49316735942933,"sku":"A0112423","price":29.9,"currency_code":"AUD","in_stock":true},{"title":"KX120-150 Coupling","offer_id":49316735975701,"sku":"A0112424","price":50.06,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/cone-ring-pin-nut-1408660.jpg?v=1781503074"},{"product_id":"cone-ring-pin-nut-rubber-assembly","title":"Cone Ring Pin, Nut, Rubber Assembly","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Pin, Nut, Rubber Assembly\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Pin, Nut, Rubber Assembly\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eIndustrial duty product\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eCone Ring Pin, Nut, Rubber Assembly: industrial product for Australian plant duty. Refer to product specifications for full details.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Finer Power Transmissions","offers":[{"title":"KX30-42 Coupling","offer_id":49316738269461,"sku":"A0112425","price":10.64,"currency_code":"AUD","in_stock":true},{"title":"KX48-70 Coupling","offer_id":49316738302229,"sku":"A0112426","price":20.82,"currency_code":"AUD","in_stock":true},{"title":"KX75-105 Coupling","offer_id":49316738334997,"sku":"A0112427","price":49.27,"currency_code":"AUD","in_stock":true},{"title":"KX120-150 Coupling","offer_id":49316738367765,"sku":"A0112428","price":81.22,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/cone-ring-pin-nut-rubber-assembly-7594458.jpg?v=1781503073"},{"product_id":"cone-ring-rubber","title":"Cone Ring Rubber","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Rubber\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Rubber\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eIndustrial duty product\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eCone Ring Rubber: industrial product for Australian plant duty. Refer to product specifications for full details.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Finer Power Transmissions","offers":[{"title":"KX20 Coupling","offer_id":49316740661525,"sku":"A0112429","price":1.07,"currency_code":"AUD","in_stock":true},{"title":"KX30-42 Coupling","offer_id":49316740694293,"sku":"A0112430","price":1.38,"currency_code":"AUD","in_stock":true},{"title":"KX48-70 Coupling","offer_id":49316740727061,"sku":"A0112431","price":2.3,"currency_code":"AUD","in_stock":true},{"title":"KX75-105 Coupling","offer_id":49316740759829,"sku":"A0112432","price":4.68,"currency_code":"AUD","in_stock":true},{"title":"KX120-150 Coupling","offer_id":49316740792597,"sku":"A0112433","price":8.39,"currency_code":"AUD","in_stock":true},{"title":"KX170 Coupling","offer_id":49316740825365,"sku":"A0112434","price":23.36,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/cone-ring-rubber-3592549.jpg?v=1781503073"},{"product_id":"cone-ring-coupling-polyurethane","title":"Cone Ring Coupling - Polyurethane","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring coupling, bush half\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eCone Ring Coupling - Polyurethane\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003ePilot bore hub\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eCone Ring coupling bush-half. Cone Ring couplings use a pin-and-bush design with rubber cone rings to provide flexible drive transmission. Pilot bore for finish-bored shaft fit. Pairs with the matching pin half to make a complete coupling.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Finer Power Transmissions","offers":[{"title":"KX30-42 Coupling","offer_id":49318250643733,"sku":"A0151021","price":8.57,"currency_code":"AUD","in_stock":true},{"title":"KX48-70 Coupling","offer_id":49318250676501,"sku":"A0151022","price":17.27,"currency_code":"AUD","in_stock":true},{"title":"KX75-105 Coupling","offer_id":49318250709269,"sku":"A0151023","price":21.28,"currency_code":"AUD","in_stock":true},{"title":"KX120-150 Coupling","offer_id":49318250742037,"sku":"A0151024","price":28.01,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/cone-ring-coupling-polyurethane-6716136.jpg?v=1779093073"}],"url":"https:\/\/aimsindustrial.com.au\/en-nz\/collections\/coupling-pins.oembed","provider":"AIMS Industrial Supplies","version":"1.0","type":"link"}