This critical gear component, pressed onto the outer edge of the engine flywheel, engages with the starter motor pinion gear, transmitting the rotational torque from the starter motor to the engine crankshaft. It is a core transmission component in the engine starting process. Ensuring precise interference fit with the flywheel, perfect meshing with the starter gear, and reliability and durability under high impact loads are crucial to prevent malfunctions such as gear stripping or disengagement during starting.
The inner diameter dimensions and the outer diameter of the flywheel are precisely calculated to ensure a secure fit and prevent loosening under frequent starting impacts.
Made of high-quality alloy steel (such as 20CrMnTi), forged and precision gear-cut, and subjected to high-frequency induction hardening of the teeth, ensuring high surface hardness (HRC≥55) and high wear resistance, while maintaining good toughness in the core.
17: Oil Seal
A precision rubber seal used to seal the gap between a rotating or reciprocating shaft and its housing. Its core function is to prevent lubricating oil (engine oil, gear oil, etc.) from leaking from the inside of the mechanism, while also preventing external dust, mud, and other contaminants from entering, ensuring the cleanliness and normal operation of critical assemblies such as transmission boxes, engines, and hydraulic systems.
