{"product_id":"new-one-vtv-90jb-50g12-gear-box-90jb50g12","title":"[One] VTV 90JB 50G12 Gear Box - 90JB50G12","description":"\u003c!-- SEO Introduction --\u003e\n\u003cdiv class=\"koeed-container\" style=\"line-height: 1.6; color: #333; font-family: sans-serif; width: 100%;\"\u003e\n    \u003ch2 style=\"color: #0056b3; border-left: 5px solid #16c8c8; padding-left: 15px; margin-top: 0;\"\u003eVTV 90JB50G12 Gear Box (1:50 Ratio, 90mm Frame)\u003c\/h2\u003e\n    \u003cp\u003e\n        The \u003cstrong\u003eVTV 90JB50G12 Gear Box\u003c\/strong\u003e is a precision-engineered, heavy-duty speed reducer designed for industrial micro-motor applications. Featuring a standard \u003cstrong\u003e90mm x 90mm frame footprint\u003c\/strong\u003e and a \u003cstrong\u003e1:50 reduction ratio\u003c\/strong\u003e, it is purpose-built to convert high-speed motor rotation into manageable, high-torque output, making it an essential component for automated conveying and motion control systems.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        Manufactured with hardened alloy steel gears and high-quality ball bearings, the 90JB series ensures low-noise operation and exceptional durability under continuous loads. Equipped with a standard \u003cstrong\u003e12mm keyed output shaft\u003c\/strong\u003e, this gearbox seamlessly pairs with standard 60W, 90W, and 120W AC or DC micro-motors, providing reliable power transmission for packaging machinery, food processing conveyors, and assembly line automation.\n    \u003c\/p\u003e\n\n    \u003c!-- Technical Specifications --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eDetailed Technical Specifications\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n        \u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #eeeeee;\"\u003e\n            \u003cthead\u003e\n                \u003ctr style=\"background-color: #16c8c8; color: white;\"\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eParameter\u003c\/th\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eSpecification Data\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eBrand \u0026amp; Series\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eVTV \/ 90JB Series (Micro-motor Gearhead)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e90JB50G12\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eReduction Ratio\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e1:50\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eMounting Frame Size\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e90 mm x 90 mm Flange\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eOutput Shaft Configuration\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e12 mm Diameter, with Standard Keyway (Type G)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eGear Type\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eSpur \/ Helical gearing for smooth power transfer\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eBearing \u0026amp; Lubrication\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eDeep groove ball bearings, pre-lubricated with high-temperature grease (maintenance-free)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eMotor Compatibility\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eFits standard metric 90mm AC\/DC micro-motors (e.g., 60W, 90W, 120W) with matching pinion shafts\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Application \u0026 Reliability --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eIndustrial Application \u0026amp; Power Transmission\u003c\/h3\u003e\n    \u003cp\u003e\n        The 1:50 gear ratio hits the \"sweet spot\" for many industrial automation tasks, balancing slow, controlled movement with a substantial multiplication of motor torque.\n    \u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eConveyor Systems:\u003c\/strong\u003e Reduces a standard 1400 RPM motor down to a highly manageable 28 RPM, providing smooth, steady tracking for product assembly lines and packaging belts.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMaterial Mixers \u0026amp; Agitators:\u003c\/strong\u003e Delivers the high rotational force (torque) necessary to stir viscous liquids or granular materials without stalling the base motor.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eRotary Actuators:\u003c\/strong\u003e Perfect for indexing tables and automated doors where precise, high-torque positioning is required over rapid speed.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003c!-- Koeed B2B Tool: Gearbox RPM \u0026 Torque Calculator --\u003e\n    \u003cdiv id=\"koeed-gearbox-tool\" style=\"background: #f9f9f9; border: 2px solid #16c8c8; border-radius: 8px; padding: 20px; margin: 30px 0;\"\u003e\n        \u003ch3 style=\"margin-top: 0; color: #16c8c8;\"\u003eEngineering Tool: Final Output RPM \u0026amp; Torque Calculator\u003c\/h3\u003e\n        \u003cp style=\"font-size: 0.9em; color: #666;\"\u003eA gearbox is a passive multiplier. Its final performance depends entirely on the motor you attach to it. Use this calculator to determine the exact output speed (RPM) and output torque (N·m) of the 90JB50G12 based on your specific motor's specifications.\u003c\/p\u003e\n        \n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eMotor Rated Power (Watts):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-power-input\" value=\"90\" min=\"1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*e.g., 60W, 90W, 120W.\u003c\/small\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eMotor Base Speed (RPM):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-rpm-input\" value=\"1400\" min=\"1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*Typical 4-pole AC motor at 50Hz runs around 1300-1400 RPM.\u003c\/small\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n\n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eGear Reduction Ratio:\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-ratio-input\" value=\"50\" disabled style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; background-color: #e9ecef;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*Fixed for model 90JB50G12.\u003c\/small\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eEstimated Gear Efficiency (%):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-eff-input\" value=\"81\" min=\"10\" max=\"100\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*A 1:50 spur\/helical gear typically operates at 75%-85% efficiency.\u003c\/small\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n        \n        \u003cbutton onclick=\"koeedCalculateGearbox()\" style=\"background: #16c8c8; color: white; border: none; padding: 12px 24px; border-radius: 4px; cursor: pointer; font-weight: bold; transition: background 0.3s;\"\u003eCalculate Output Performance\u003c\/button\u003e\n        \n        \u003cdiv id=\"koeed-gear-results\" style=\"margin-top: 20px; padding: 15px; background: white; border-radius: 4px; border-left: 5px solid #0056b3; display: none; box-shadow: 0 2px 4px rgba(0,0,0,0.05);\"\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eBase Motor Torque:\u003c\/strong\u003e \u003cspan id=\"koeed-mt-out\" style=\"color: #333; font-weight: bold;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eFinal Output Speed:\u003c\/strong\u003e \u003cspan id=\"koeed-orpm-out\" style=\"color: #0056b3; font-weight: bold; font-size: 1.2em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 5px;\"\u003e\n\u003cstrong\u003eFinal Output Torque:\u003c\/strong\u003e \u003cspan id=\"koeed-ot-out\" style=\"color: #d32f2f; font-weight: bold; font-size: 1.2em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cp id=\"koeed-warning-msg\" style=\"font-size: 0.85em; color: #d32f2f; margin-top: 10px; font-weight: bold; display: none;\"\u003e⚠️ Warning: Output torque exceeds 20 N·m. Verify that the 12mm shaft and internal gears are rated for this much physical stress, or internal shearing may occur.\u003c\/p\u003e\n            \u003cp style=\"font-size: 0.85em; color: #555; margin-top: 10px; border-top: 1px solid #eee; padding-top: 10px;\"\u003e*Physics Formula: Output RPM = Motor RPM ÷ Ratio. Motor Torque (N·m) = (9.5488 × Power in Watts) ÷ Motor RPM. Final Torque = Motor Torque × Ratio × Efficiency.\u003c\/p\u003e\n        \u003c\/div\u003e\n\n        \u003cnoscript\u003e\n            \u003cp\u003e\u003cstrong\u003eSEO Calculation Formula:\u003c\/strong\u003e To calculate gearbox performance: Output RPM = Motor RPM \/ Gear Ratio. Base Motor Torque (N·m) = (9.5488 * Power in Watts) \/ Motor RPM. Final Output Torque (N·m) = Motor Torque * Gear Ratio * Gear Efficiency. For example, a 90W motor running at 1400 RPM paired with this 1:50 gearbox at 81% efficiency will produce an output speed of 28 RPM and a massive final output torque of approximately 24.8 N·m.\u003c\/p\u003e\n        \u003c\/noscript\u003e\n    \u003c\/div\u003e\n\n    \u003cscript\u003e\n        function koeedCalculateGearbox() {\n            const powerW = parseFloat(document.getElementById('koeed-power-input').value);\n            const motorRPM = parseFloat(document.getElementById('koeed-rpm-input').value);\n            const ratio = parseFloat(document.getElementById('koeed-ratio-input').value);\n            const effPercent = parseFloat(document.getElementById('koeed-eff-input').value);\n            \n            const resultsBox = document.getElementById('koeed-gear-results');\n            const warningMsg = document.getElementById('koeed-warning-msg');\n\n            if (isNaN(powerW) || isNaN(motorRPM) || isNaN(effPercent) || powerW \u003c= 0 || motorRPM \u003c= 0 || effPercent \u003c= 0) {\n                alert(\"Please enter valid positive numbers for Power, RPM, and Efficiency.\");\n                return;\n            }\n\n            const efficiency = effPercent \/ 100;\n\n            \/\/ Motor Base Torque Calculation: T = 9.5488 * (P \/ n)\n            const baseTorqueNm = 9.5488 * (powerW \/ motorRPM);\n\n            \/\/ Output RPM Calculation\n            const outputRPM = motorRPM \/ ratio;\n\n            \/\/ Output Torque Calculation: Tout = Tin * Ratio * Efficiency\n            const outputTorqueNm = baseTorqueNm * ratio * efficiency;\n\n            document.getElementById('koeed-mt-out').innerHTML = baseTorqueNm.toFixed(3) + \" N·m\";\n            document.getElementById('koeed-orpm-out').innerHTML = outputRPM.toFixed(1) + \" RPM (Revolutions Per Minute)\";\n            document.getElementById('koeed-ot-out').innerHTML = outputTorqueNm.toFixed(2) + \" N·m (Newton-meters)\";\n            \n            \/\/ Typical 90mm gearbox max permissible torque is usually around 20 Nm. Show warning if exceeded.\n            if (outputTorqueNm \u003e 20) {\n                warningMsg.style.display = 'block';\n            } else {\n                warningMsg.style.display = 'none';\n            }\n\n            resultsBox.style.display = 'block';\n        }\n    \u003c\/script\u003e\n\n    \u003c!-- Troubleshooting FAQ --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eMaintenance \u0026amp; Troubleshooting FAQ\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003e1. Can I attach this VTV 90JB gearbox to any brand of motor?\u003c\/strong\u003e\u003cbr\u003e\n    The gearbox is designed to fit standard metric 90mm frame micro-motors. However, the critical compatibility factor is the \u003cstrong\u003emotor's pinion shaft\u003c\/strong\u003e. The helical\/spur gear cut on the motor shaft must perfectly match the internal receiving gear of the VTV 90JB. If the teeth profile or module differs, it will cause severe grinding and immediate failure. It is highly recommended to pair VTV gearboxes with VTV motors.\u003c\/p\u003e\n    \n    \u003cp\u003e\u003cstrong\u003e2. The gearbox is emitting a loud grinding noise during operation.\u003c\/strong\u003e\u003cbr\u003e\n    Excessive noise usually stems from one of three issues: First, check if the load exceeds the gearbox's permissible torque, causing gear tooth deflection. Second, radial overload on the 12mm output shaft (e.g., from an over-tightened drive chain or belt) can damage the internal ball bearings. Third, internal grease may have degraded or leaked out over years of heavy use.\u003c\/p\u003e\n\n    \u003cp\u003e\u003cstrong\u003e3. How do I fix grease leaking from the output shaft?\u003c\/strong\u003e\u003cbr\u003e\n    Leakage at the 12mm output shaft indicates that the internal oil seal has failed, typically due to excessive operating temperatures, radial shaft stress, or simply age. You will need to unmount the gearbox, remove the retaining ring (circlip), and press in a new appropriately sized lip seal. Ensure you repack the gears with high-grade industrial gear grease before reassembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- Structured Data --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are VTV 90JB gearboxes compatible with all 90mm motors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"While the 90mm flange footprint is standard, the motor's pinion shaft gear profile must exactly match the internal gearing of the VTV gearbox. Mismatched gears will cause immediate failure. Pairing VTV gearboxes with VTV motors is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why is my 90JB50G12 gearbox making a loud grinding noise?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grinding noise typically indicates gear tooth deflection from exceeding the maximum permissible torque, damaged internal ball bearings due to excessive radial load (e.g., tight drive chains), or a lack of internal lubricating grease.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How to fix a leaking output shaft on a micro gearbox?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grease leaking from the output shaft means the oil seal has degraded or torn. You must disassemble the front cover, remove the old seal, press in a new oil seal, and repack the unit with appropriate gear grease.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"WebApplication\",\n  \"name\": \"Gearbox Output RPM \u0026 Torque Calculator\",\n  \"description\": \"An engineering calculator to determine the final output speed (RPM) and output torque (N·m) of industrial gearboxes based on base motor power, speed, reduction ratio, and efficiency.\",\n  \"applicationCategory\": \"EngineeringTool\",\n  \"operatingSystem\": \"Any\"\n}\n\u003c\/script\u003e","brand":"KOEED","offers":[{"title":"Default Title","offer_id":44399944204473,"sku":"405056582768","price":240.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_3cd0d91d-a262-4790-967a-59752f29b664.jpg?v=1723032656","url":"https:\/\/koeed.com\/pl\/products\/new-one-vtv-90jb-50g12-gear-box-90jb50g12","provider":"KOEED","version":"1.0","type":"link"}