1316303071,1316303064 ZF gearbox gear 32T 16S 181/221

Structural features:

1. Helical gear profile:

   Adopting a heavy-duty helical gear design, the tooth surfaces progressively mesh, resulting in high overlap; it has low transmission impact and low noise, and can withstand greater continuous torque compared to spur gears, making it suitable for heavy-duty trucks under full load and long-distance operating conditions.

2. Floating internal hole spline-free structure：

   The gear has a smooth inner bore and no internal splines. It is loosely fitted onto the countershaft via a needle roller bearing and is a constantly meshing driven gear. It achieves independent rotation by relying on the bearing and is the primary power splitting component of the gearbox.

3. Thickened tooth blank, wide tooth surface：

   With ample tooth width and a large effective bearing area, it can withstand the instantaneous impact load brought by heavy-duty bumps; the wheel blank is forged as a whole, which is strong and not easy to deform.

Material and Process Characteristics:

1. Raw Material: Heavy-duty alloy carburized steel

2. Processing Technology: Precision hobbing + gear grinding, high tooth surface precision; carburizing and quenching + low-temperature tempering

3. Performance Advantages: High hardness and wear resistance on the tooth surface, core maintains toughness, not prone to tooth breakage or chipping; resistant to pitting and fatigue, suitable for long-term high-load operation.

Working Conditions and Usage Characteristics：

1. Permanent Constant Mesh

   Always paired with the constant mesh gear on the first shaft, continuously subjected to force regardless of the gear position in the transmission, making it a high-load and easily worn part of the transmission.

2. High-Risk Failure Points

   Prone to pitting on the tooth surface, tooth root cracks, and bearing seat wear under long-term overload and poor lubrication.

3. Interchangeability Notice

   Closely related part: 1316303064, similar in appearance but different in number of teeth, cannot be directly interchanged. Always verify the part number when purchasing and repairing.