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Totem Custom High-Performance & Durable 30crmov9 Alloy Steel Marine Propulsion Shaft1
ShaftVessel ShaftMain Shaft
SHANGHAI TOTEM MACHINERY CO., LTD.
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Product DescriptionProduct DescriptionTotem Custom High-Performance & Durable 30CrMoV9 Alloy Steel Marine Propulsion ShaftsOur 30CrMoV9 propulsion shafts are critical power transmission components meticulously manufactured from premium 30CrMoV9 chromium-molybdenum-vanadium alloy steel. This material is renowned for its exceptional combination of high tensile strength, superior toughness, excellent hardenability, and outstanding fatigue resistance. Each shaft undergoes rigorous forging, heat treatment, and precision machining processes to ensure impeccable dimensional accuracy, superior surface finish, and flawless structural integrity. Designed to withstand high torque loads, bending moments, and the harsh corrosive marine environment, our shafts guarantee reliable and efficient power delivery from the main engine to the propeller, ensuring the smooth operation of vessels.update:2025-08-29Finished Product ImageWorking PrincipleThe propulsion shaft functions as the central rotating mechanical component within a vessel's drivetrain. Its primary purpose is to transmit rotational mechanical power and torque from the ship's main engine or reduction gearbox to the propeller located outside the hull. As the engine turns the shaft, the rotational energy is converted into thrust by the propeller, which pushes against the water to propel the ship forward or backward. The shaft must reliably sustain the torsional shear stresses from torque transmission, axial stresses from thrust, and bending moments from the propeller's weight and operational forces, all while operating in a corrosive seawater environment.SpecificationKey Features? Exceptional Performance: High corrosion resistance and high strength, perfectly suited for harsh marine operating conditions, ensuring a long service life.? Precision Manufacturing: Diameter tolerance of the journal is strictly controlled to ensure optimal fit with bearings, resulting in smooth operation and minimal vibration.? Global Delivery: Professional export packaging (wooden cases/steel frames) is provided to ensure safe and intact delivery of goods worldwide.? Customization Service: OEM processing is supported, allowing for the customization of marine propulsion shafts in various specifications based on customer drawings or requirements.Applications?Marine Propulsion Systems: Main power transmission shafts for commercial ships (container ships, tankers, bulk carriers), naval vessels (frigates, destroyers, submarines), offshore support vessels, and large yachts.?High-Performance Machinery: Used in critical applications requiring high strength and fatigue resistance, such as in heavy-duty industrial turbines, large pump shafts, and power generation equipment.Machinery Processing1.Material Preparation & ForgingSelection of high-quality 30CrMoV9 alloy steel billets. 2.Heat TreatmentA precise sequence of normalizing, quenching, and tempering is applied to achieve the desired microstructure (typically tempered martensite).3.Rough MachiningTurning operations are performed to remove excess material and establish the basic geometric form and preliminary dimensions.4.Finish Machining & GrindingPrecision CNC turning and grinding are employed to achieve the final exact dimensions, tight tolerances, and superior surface finish required for the journal bearings and sealing areas.5.Non-Destructive Testing - NDTMandatory ultrasonic testing (UT) to detect internal flaws and magnetic particle inspection or liquid penetrant testing to identify surface defects. Material Preparation & ForgingFinish Machining & GrindingSurface Treatment & ProtectionSelection of high-quality 30CrMoV9 alloy steel billets. The material is often forged to refine the grain structure, improve mechanical properties, and create a near-net-shape preform.Precision CNC turning and grinding are employed to achieve the final exact dimensions, tight tolerances, and superior surface finish required for the journal bearings and sealing areas. Critical areas are protected against corrosion. This often includes applying specialized coatings on bearing journals and sealing areas, while other sections may be painted.Technical SpecificationsWe can manufacture different type of gears according to drawing. ParameterSpecificationMaterial 30CrMoV9 Alloy SteelUltimate Tensile Strength ≥ 900 - 1100 MPa Yield Strength≥ 700 MPa Elongation at Break≥ 12 % Impact Toughness ≥ 40 J Surface Hardness 270 - 320 HB OEM Service OfferedAccording to Customer DrawingsSegments Gear OfferedAccording to Customer RequestsPackaging & ShippingPackaging Specifications?Standard Export Packaging: Each propulsion shaft is meticulously prepared for international shipping. The standard packaging consists of:?Robust Wooden Crates: Custom-built to fit the shaft dimensions exactly, providing maximum structural support and impact resistance.?VCI Anti-Rust Film: The shaft is first wrapped in Volatile Corrosion Inhibitor (VCI) film. This material releases protective vapors that prevent rust and corrosion during transit and storage.?Steel Strapping: The sealed wooden crate is securely reinforced with heavy-duty steel straps to prevent any movement or damage during handling.?Additional Protection for Shipping:?Foam Spacers & Edge Guards: All sharp edges and critical surfaces (like bearing journals) are protected with high-density foam spacers and edge guards to prevent abrasion, scratches, or impact damage.?Weatherproofing: The packaging is designed to be weather-resistant, protecting the contents from moisture and environmental elements.?Marking & Labeling: Each package is clearly marked with handling instructions and product identification details for easy inventory management.HOT SALE PRODUCTSCompany ProfileSHANGHAI TOTEM MACHINERY CO., LTD.Shanghai Totem Machinery Co., Ltd. (Totem Machinery), founded in 2010, is a leading high-tech enterprise integrating R&D, production, sales, and import-export trade, headquartered in Shanghai.With 15 years of deep expertise in the machinery industry,Totem Machinery specializes in mechanical equipment, components, and bearings, excelling in providing professional solutions for the design, modification, production, and development of complex structural assemblies (e.g., bearing housing systems: ship supports, rolling mill supports; transmission systems: mining dragline applications, wind power generation, etc.). As an industry leader, our products serve a wide range of sectors, including metallurgy, chemical, shipbuilding, mining, cement, thermal power plants, agricultural machinery, and machine tool accessories.The company boasts an experienced team of mechanical designers, production engineers, assembly technicians, and sales professionals, equipped with advanced manufacturing technology, precision processing equipment, and state-of-the-art inspection instruments. We have established a comprehensive product quality assurance system and after-sales service network. Upholding the principle of "Quality as the Foundation, Service as the Core, Integrity as the Soul,"Totem Machinery remains committed to innovation and strives to become a global benchmark in the machinery manufacturing industry.In order to avoid the finish products rusted and damaged during the transportation ,we will design the right packing according to the shape,size and usage of the products.Strictly quality inspection system can produce high quality products. For each order,we can provide report for material chemical components testing,UT testing, hardness, mechanical property testing(impact testing,yield strength testing,tensile strength testing),size inspection,etc.Why Choose Us?Other ProductsOEM/ODM capabilitiesCompetitive pricing & bulk discountsProfessional Customization ServicesComplate processing solution Perfect quality control systemBearing ChockGear ShaftGear WheelFlange ShaftGirth GearFAQQ.What's TOTEM product processing progress?A.Drawing CHECK, Make Forging Mold, Forging Mold Quality Inspection Check, Machine Processing, Check Size\Hardness\Surface Finish and other technical parameters on drawing. Q.How about TOTEM's export package?A.Spray anti-rust oil on Herringbone Gear Shaft, Wrap waterproof cloth around Gear Shaft for reducer, Prepare package by shaft shape&weight to choose steel frame, steel support or wooden box etc. Q.Could I customize gear\gear shaft on TOTEM?A.We supply customized Gear Shaft,Eccentric Shaft,Herringbone Gear,Internal Gear,Bevel Gear with big module, more than 1tons big weight, more than 3m length, forging or casting 42CrMo/35CrMo or your specified required material. Q.Why can I choose TOTEM?A.TOTEM has 24hrs Salesman on-line, guarantee quick and positive feedback.TOTEM Machinery invests and becomes shareholders of several machine processing factories, forging factories, casting factories, relies on these strong reliable and high-quality supplier's network, to let customers worry-free purchase.Experienced and Professional Forwarder Guarantee Log. transportation.
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