Sprocket, .25 Keyway, 1.25 I.D., 18 Tooth AGCO Part Number 700184401 AGCO Parts for Massey Ferguson 1839 1840 Square Baler

Product Advantage

The Sprocket .25 Keyway, 1.25 I.D., 18 Tooth (AGCO Part Number 700184401) is a high-precision drive core component exclusively engineered for the power transmission system of AGCO Massey Ferguson 1839/1840 Square Balers— the flagship small and medium-scale models for global hay, forage and straw baling operations. As a critical power transmission part in the baler’s entire working cycle, this sprocket undertakes the core task of stable torque transmission and precise speed matching: in the baling process, it perfectly meshes with the drive chain of the baler, accurately transmitting the power of the main engine to key working mechanisms such as the knotter system, pick-up unit and compression mechanism, converting the rotary motion of the power end into the coordinated mechanical action of each functional unit of the baler. Its precise tooth profile and dimensional design ensure synchronous and non-slip power transmission between all core mechanisms, directly avoiding power transmission lag, tooth skipping or chain jamming—common malfunctions that cause uncoordinated operation of the baler, reduced baling efficiency, damaged drive components, and costly field downtime, while severely affecting the continuous and stable operation of the baling process.

High Durability

Crafted to withstand the harsh and continuous dynamic load working conditions of the Massey Ferguson 1839/1840 Square Baler’s power transmission system (long-term high-torque rotation, frequent chain meshing friction, impact vibration during field operation, exposure to dust, moisture and crop residues), the Sprocket 700184401 is manufactured with high-performance alloy structural steel and undergoes a full set of professional heat treatment and surface strengthening processing for targeted durability and wear resistance enhancement: the whole sprocket is subject to quenching and tempering treatment to optimize the internal metallographic structure, significantly improving its tensile strength, bending resistance and fatigue resistance to withstand long-term high-torque transmission without deformation or fracture; the tooth surface is processed with high-frequency induction hardening, making the tooth surface hardness reach HRC58-62, effectively resisting wear and pitting caused by long-term meshing with the drive chain; the surface is coated with anti-corrosion and anti-rust electrophoretic paint, forming a dense protective film to prevent rust and corrosion caused by field moisture, crop juice and dust accumulation. Even after a full farming season of intensive baling operations, the sprocket still retains its original precise tooth profile, stable meshing performance and reliable torque transmission capacity—eliminating frequent replacement and minimizing unplanned downtime of the Massey Ferguson 1839/1840.

High Compatibility

Meticulously engineered to fully comply with AGCO’s original equipment (OE) specifications and tolerance standards for the Massey Ferguson 1839/1840 Square Baler’s power transmission system, the Sprocket 700184401 achieves seamless integrated installation with the original drive shaft, drive chain and adjacent transmission components, and reaches perfect OE-grade matching fit with the entire power transmission system. No modifications to the drive shaft, chain guard, mounting bracket or transmission housing of the baler are required. All key design dimensions and structural details of the sprocket are precision-matched to the original parts: the 1.25 inner diameter (I.D.) is perfectly adapted to the original drive shaft’s outer diameter, ensuring tight and non-slip assembly; the .25 keyway is accurately aligned with the drive shaft’s key slot, realizing reliable torque transmission without idle rotation; the 18 tooth design has consistent tooth profile, tooth pitch and tooth thickness with the original sprocket, ensuring perfect meshing with the original drive chain; the mounting spacing and end face runout tolerance fully comply with AGCO’s OE standards, avoiding abnormal vibration and noise during operation. This "drop-in" OE-level compatibility enables quick and tool-friendly replacement (even in field settings), preserves the original power transmission accuracy and stability of the baler, and avoids malfunctions such as chain off-track, tooth wear and drive system jamming caused by ill-fitting aftermarket sprockets.

Stable Performance

The Sprocket 700184401 delivers consistent and reliable power transmission performance even under the most demanding baling working scenarios of the Massey Ferguson 1839/1840—including processing high-moisture dense crops (e.g., wet alfalfa, heavy straw), operating at the baler’s maximum working speed, or continuous long-hour field baling work. Its optimized structural and processing design features three core advantages for stable performance: Precise meshing performance: The high-precision CNC machined tooth profile ensures zero clearance and non-slip meshing with the drive chain, realizing smooth and continuous torque transmission without tooth skipping or chain jamming even under high-torque load; Stable dynamic balance: The sprocket undergoes professional dynamic balance calibration during production, ensuring minimal end face runout and radial runout during high-speed rotation, eliminating abnormal vibration and noise of the transmission system, and protecting adjacent components from vibration damage; Strong load-bearing capacity: The quenched and tempered alloy steel material and integrated forging structure enable the sprocket to withstand the instantaneous peak torque generated during the baler’s compression and knotting process, without deformation, tooth chipping or fracture. By eliminating power transmission instability, meshing failure and load-bearing damage, this sprocket sustains the stable and efficient operation of the baler’s entire power transmission system and all functional mechanisms, avoiding baling efficiency reduction, component damage and production losses during peak harvesting seasons.

High Precision

Produced using advanced CNC precision machining, integral forging and professional heat treatment technologies (specifically calibrated for AGCO’s strict OE dimensional and tolerance standards), the Sprocket 700184401 undergoes rigorous multi-stage quality inspection with high-precision testing equipment, and all key performance and dimensional indicators are strictly verified before delivery to ensure full compliance with AGCO’s OE requirements: Dimensional precision verification: Key dimensions including inner diameter (1.25), keyway size (.25), tooth pitch, tooth thickness and outer diameter are inspected to ±0.02mm accuracy, ensuring perfect matching with original components; Meshing performance testing: The sprocket is tested for meshing with the original AGCO drive chain to verify the smoothness of meshing, no clearance and non-slip performance under different torque loads, consistent with the baler’s power transmission timing; Hardness and strength detection: The surface hardness of the tooth and the overall tensile strength of the sprocket are tested by professional hardness testers and universal testing machines, ensuring compliance with AGCO’s OE material performance standards; Dynamic balance detection: High-speed dynamic balance testing is performed to ensure the sprocket meets the OE dynamic balance grade, avoiding abnormal vibration during operation. This all-round high precision of the sprocket ensures two critical outcomes for the baler’s operation: Ultra-stable power transmission: Guarantees consistent and non-slip torque transmission to all key working mechanisms, the core prerequisite for the coordinated and efficient operation of the baler; Perfect synchronization with working timing: Achieves seamless cooperation with the knotter, compression and pick-up mechanisms of the baler, avoiding uncoordinated operation, reduced baling quality and component damage caused by power transmission asynchrony.

Excellent Cost-Effectiveness

The Sprocket 700184401 delivers long-term superior economic value with its OE-grade durability, precision and stable performance, comprehensively addressing the key cost drivers for Massey Ferguson 1839/1840 operators in the whole life cycle: Reduced replacement costs: The high-performance alloy steel material and professional surface strengthening processing make the service life of the sprocket 4-5 times longer than generic aftermarket sprockets; the perfect OE matching avoids abnormal wear of the sprocket, drive chain and drive shaft caused by poor fit, eliminating frequent purchase and replacement of damaged transmission components; Avoided secondary damage: By preventing power transmission malfunctions such as tooth skipping, chain jamming and sprocket fracture, the sprocket effectively protects high-value core components of the baler (e.g., knotter gearbox, main drive shaft, compression crankshaft) from costly wear, deformation and repair; Minimized downtime losses: During peak baling seasons, even a short downtime caused by sprocket failure can lead to significant lost crop harvesting—its stable and reliable performance fundamentally avoids such production and economic losses. Compared to low-quality aftermarket sprockets (which often have poor dimensional precision, easy wear and short service life), this OE-grade Sprocket 700184401 lowers the total operational and maintenance costs of the Massey Ferguson 1839/1840 over multiple farming cycles with its excellent overall performance and long service life.

Large Inventory & Fast Delivery

We maintain a dedicated large-scale inventory for the Sprocket 700184401, specifically stocked to meet the urgent replacement needs of the Massey Ferguson 1839/1840 Square Baler’s power transmission system during peak baling seasons (spring hay, summer and fall straw baling). Our logistics network is fully optimized for global agricultural customers, offering efficient, flexible and on-time distribution services with multiple shipping channels; at the same time, we provide a full range of supporting services to ensure customers’ worry-free purchase and use: Fast delivery: Covering farms, agricultural service centers, repair workshops and agricultural machinery dealers worldwide, with a 2-3 day delivery turnaround for most regions; Emergency priority shipping: Providing expedited air and express shipping options for urgent field failures (e.g., sprocket tooth chipping, deformation or fracture during harvest), ensuring the replacement sprocket is delivered to the site in the shortest time; Complimentary professional technical support: Our AGCO-certified technical team provides one-stop pre-sales and after-sales technical services, including pre-purchase compatibility checks (confirming fit with specific 1839/1840 serial numbers), on-site installation and assembly guidance (e.g., keyway alignment, chain meshing adjustment), and post-installation maintenance tips (e.g., regular lubrication of the drive chain, wear inspection of the sprocket tooth surface, mounting firmness check). This one-stop end-to-end product and service support ensures customers can quickly obtain the genuine OE-grade sprocket, complete replacement and maintenance in the shortest time, minimize the operational interruption of the baler, and keep the Massey Ferguson 1839/1840 running at full capacity throughout the entire baling season.