{"product_id":"castair-replacement-industrial-v-type-cogged-belt-section-b-length-64-3-bx64","title":"Castair Replacement Industrial V-Type Cogged Belt Section B Length 64\" 3-BX64","description":"\u003cp\u003eThe Castair 3-BX64 is a BX-section cogged V-belt with a 64-inch outside circumference, engineered as a direct replacement for Cast Air compressor drives that specify this belt. If your compressor left the factory with a cogged belt, it needs to come back with a cogged belt — the BX designation is not interchangeable with a standard smooth-back B64. The difference matters in service life, heat buildup, and efficiency, and swapping in the wrong profile is a shortcut that costs you more in the long run.\u003c\/p\u003e\n\n\u003ch3\u003eCogged Belt Advantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced bending stress:\u003c\/strong\u003e The transverse notches molded into the underside of a BX belt allow the belt to bend more freely around sheave grooves. A classical B-section belt has a solid rubber underside that resists flex — on tighter pulleys or under sustained high-cycle loads, that resistance generates heat and accelerates fatigue. The cogged underside eliminates the stiff section, so each revolution puts less mechanical stress on the belt carcass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooler operation:\u003c\/strong\u003e The notch pattern creates airflow channels as the belt moves through the drive. This is not a minor detail — on a compressor running two-stage or continuous-duty cycles, belt temperature is a real service-life factor. Cogged belts run measurably cooler than classical belts under equivalent loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter flex and fatigue resistance:\u003c\/strong\u003e Lower bending resistance means less heat generation, which directly translates to longer belt life, particularly in applications with frequent start-stop cycles or variable loads — both common in compressor service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher power transmission efficiency:\u003c\/strong\u003e Cogged belts deliver approximately 2% more power transmission efficiency compared to classical wrapped V-belts of the same section. On a large compressor motor, that adds up over operating hours and lowers your effective energy cost per duty cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame sheave compatibility as B-section:\u003c\/strong\u003e BX cogged belts share the same trapezoidal cross-section geometry as standard B-section belts — 21\/32\" top width, 13\/32\" depth. They drop directly into any B-groove sheave without modification. No new pulleys, no re-machining.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBelt Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt designation:\u003c\/strong\u003e 3-BX64 (Castair \/ Cast Air OEM part number)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection profile:\u003c\/strong\u003e BX — cogged\/notched B-section\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop width:\u003c\/strong\u003e 21\/32 inch (0.656\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 13\/32 inch (0.406\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside circumference:\u003c\/strong\u003e 64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner construction:\u003c\/strong\u003e Transverse notched (cogged) underside — molded notches reduce bending resistance and promote airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCord type:\u003c\/strong\u003e Polyester tension member (standard BX construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCover:\u003c\/strong\u003e Wrapped or raw-edge fabric depending on production run — confirm with us if raw-edge matters for your application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Standard industrial range — consult us for high-ambient-temperature installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility and Fit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eB-groove sheave compatible:\u003c\/strong\u003e The BX section drops into any standard B-section sheave groove. No special pulley required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair \/ Cast Air compressors:\u003c\/strong\u003e This belt is specified for Cast Air compressor models that call for a BX64 cogged drive belt. Check your compressor's parts list or the belt currently on the machine before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not substitute a classical B64:\u003c\/strong\u003e If your machine was built with a cogged BX64, it was engineered for that belt profile. A smooth-back B64 will fit the sheave but will run hotter and wear faster under the same load conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm your model:\u003c\/strong\u003e If you are unsure whether this is the right belt for your specific Cast Air serial number, call 866-217-0063 before ordering. We stock Cast Air parts and can cross-reference your model.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to Choose Cogged Over Standard\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-cycle duty:\u003c\/strong\u003e Compressors that cycle on and off frequently — automotive shops, tire shops, body shops — generate more accumulated flex fatigue per hour than lightly loaded drives. Cogged belts handle high-cycle applications better than classical belts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable pitch drives:\u003c\/strong\u003e Drives with variable-speed pulleys or adjustable pitch sheaves benefit from the lower bending resistance of cogged belts, which conform more easily to changing effective diameters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat buildup concerns:\u003c\/strong\u003e If your compressor room runs hot, or if you have had premature belt failures due to heat cracking, switch to cogged. The notch cooling effect is real and measurable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger service interval goals:\u003c\/strong\u003e Shops that want to stretch belt replacement intervals — say, from every six months to annually — should start with a cogged belt and verify proper tension and alignment. The efficiency gain and reduced thermal load translate directly to longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM specification:\u003c\/strong\u003e If Cast Air put a cogged belt on the machine originally, that is your answer. Match the OEM spec.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelieve tension before removal:\u003c\/strong\u003e Loosen the motor mounting bolts or adjustment slide to create slack. Never pry a belt over a sheave — this cracks the cord and starts internal delamination you cannot see from the outside.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect sheaves before installing a new belt:\u003c\/strong\u003e Check for worn or sharp groove edges, rust ridges, or off-center wear patterns. A damaged sheave will destroy a new belt in a fraction of the expected service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet tension correctly:\u003c\/strong\u003e V-belts — cogged or classical — need proper tension to transmit power without slipping. Too loose causes slip and heat. Too tight overloads bearings. Follow the Cast Air service manual deflection specification for this belt length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlignment matters:\u003c\/strong\u003e Sheave misalignment causes edge loading and uneven wear. Check with a straightedge across the sheave faces before finalizing tension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRun-in period:\u003c\/strong\u003e New belts seat into sheave grooves during the first few hours of operation. Recheck tension after the first 30 minutes of run time and again after 24 hours.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible cracking:\u003c\/strong\u003e Cracks across the belt face or through the sidewalls — even small ones — indicate the rubber compound has hardened and is breaking down. Replace immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFraying or cord exposure:\u003c\/strong\u003e If you can see cord fibers through the belt cover, the tensile member is exposed and failure is imminent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlazed sidewalls:\u003c\/strong\u003e A shiny, hardened sidewall surface means the belt has been slipping. Find the cause (tension, sheave condition, overload) and address it before installing the replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquealing under load:\u003c\/strong\u003e Belt squeal on startup or under load is typically a tension problem, but it can also indicate sidewall wear or sheave groove damage. Diagnose before replacing the belt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration or tracking issues:\u003c\/strong\u003e Unusual vibration from the drive often points to a belt that has stretched unevenly, has a damaged section, or has developed a flat spot from sitting under tension without running.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScheduled replacement:\u003c\/strong\u003e Even if a belt looks acceptable, replace on a scheduled interval — at minimum annually in shop environments. The cost of a belt is a fraction of the cost of a compressor failure during a busy day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eAir Compressor Factory Direct has specialized in compressor parts, belts, and accessories since 2016. We stock replacement belts — classical and cogged — for Cast Air, Castair, and a broad range of industrial compressor manufacturers. When you call us, you are talking to someone who knows compressor drives, not a general parts counter. We stock what your compressor actually needs, and we can cross-reference your model and serial number to confirm fitment before you order.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLive technical support:\u003c\/strong\u003e 866-217-0063 — talk to a compressor specialist, not a call center\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all belts we sell\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest fitment guidance:\u003c\/strong\u003e If this is not the right belt for your machine, we will tell you before you buy, not after\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342506778837,"sku":"3-BX64","price":51.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/beltb_d019677b-d08c-4a38-ad31-9e66b494a924.jpg?v=1772652515","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-replacement-industrial-v-type-cogged-belt-section-b-length-64-3-bx64","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}