ZP 01.340 Reverse Gear Sprocket

ZP 01.340 Reverse Gear Sprocket for Grain Thrower

The ZP 01.340 sprocket is an essential chain drive component of the ZP 01.220 reverse gear mechanism, utilized within the running gear of ZM-60, ZM-60A, ZM-60U, and ZM-90U grain throwers. It is mounted directly onto the ZP 01.625 reverse drive half-axle and is responsible for receiving torque from the self-propelled gearbox via the drive chain and transferring it onward to the machine's driving wheel.

A key feature of this sprocket, aside from ensuring smooth machine operation across the threshing floor, is its crucial safety function within the transmission. Unlike standard drive sprockets, this component was originally designed for installation onto a smooth, keyway-free shaft surface, secured entirely by a specialized ZP 01.646 shear pin. This engineering choice creates an effective protective barrier: in the event of wheel jamming or critical overload during movement, the pin shears first, preventing catastrophic chain snapping and expensive damage to the self-propelled gearbox.

However, under real field conditions, this classic solution frequently caused inconveniences—frequent pin shearing from normal peak loads or wear on the mounting bore caused constant operational halts. Striving to enhance drive reliability, both farmers and various manufacturers often modified this assembly. The smooth fit was replaced with a proper keyed connection—milling a keyway into the shaft and inside the sprocket hub for a prismatic key, or substituting hardened heavy-duty pins. While this significantly strengthened the assembly and eliminated frequent stoppages, the trade-off was severe: eliminating or excessively reinforcing this engineered safety link removed the transmission's emergency protection. During an actual wheel jam, the destructive impact was absorbed by other components—leading to snapped drive chains, deformed sprocket teeth, or even catastrophic failure of the gears inside the self-propelled gearbox. The specialists at Zavod Moroza fully understand these operational risks and offer balanced engineering solutions that maintain the precise balance between torque transmission and robust protection for the entire kinematic system.

Technical Specifications of the ZP 01.340 Sprocket

• Catalog number: ZP 01.340
• Application: ZM-60, ZM-60A, ZM-60U, ZM-90U
• Installation assembly: Rear drive ZP 01.220 (driving shaft ZP 01.625 with jaw clutch)
• Number of teeth (Z): 25 teeth
• Chain pitch (t): 19.05 mm (for PRL-19.05 drive chain)
• Bore diameter: 30 mm
• Shaft fixation method: Through safety shear pin ZP 01.646 (keyed connection in modified versions)
• Axial fixation: 2 thrust retaining rings (6511 019 GOST 2833-77) in shaft grooves (original design)
• Part weight: 2 kg

The precisely milled 25-tooth rim tailored for a 19.05 mm chain pitch is designed to handle high traction loads as the heavy grain thrower moves across the floor. The tooth profile ensures a soft, smooth engagement with the PRL-19.05 chain, preventing chain climbing, jerking, and accelerated bushing wear. The smooth 30 mm inner bore with a through-drilling represents the standard factory configuration. The sprocket sits freely on the smooth surface of the ZP 01.340 shaft and is secured exclusively by the specialized ZP 01.646 shear pin designed to fail under critical wheel-drive overloads. Dual-sided axial retention via retaining rings ensures positional stability: grooves are machined onto the ZP 01.625 shaft on both sides of the sprocket, into which spring rings snap—blocking longitudinal displacement caused by vibrations and keeping the sprocket aligned in the same plane as the self-propelled gearbox drive sprocket.

Acknowledging the agricultural sector's desire to avoid frequent stoppages caused by sheared pins, Zavod Moroza engineers have developed technically sound custom configurations for this assembly. If you require a ZP 01.340 sprocket designed for a keyed connection, we manufacture it with high-precision keyway milling and strictly maintained shaft fit tolerances. We calculate key parameters and sprocket material specifications to significantly enhance operational reliability while preserving a controlled safety threshold—eliminating parasitic play and constant stops while protecting the costly self-propelled gearbox from destructive gear shattering during jams.

Associated Parts for the ZP 01.340 Grain Thrower Reverse Sprocket

During replacement or servicing of the ZP 01.340 drive sprocket, the entire torque transmission assembly associated with it must be inspected. Related components include:

• Reverse shaft ZP 01.625
• Safety shear pin ZP 01.646
• Thrust retaining rings (6511 019 GOST 2833-77)
• Drive chain PRL-19.05
• Support bearing assemblies (11206 bearings in H 026.058 housings)

Modifying how the ZP 01.340 sprocket is secured requires comprehensive adjustments to adjacent drive elements. Transitioning from a classic smooth fit with a shear pin to a keyed connection requires coordinated use of a slotted shaft, machining a matching slot into the sprocket, and precise key selection. Furthermore, depending on operating conditions and axle wear levels, the axial retention scheme often shifts—ranging from standard spring rings in shaft grooves to auxiliary spacer bushings or clamping elements. A deep understanding of these kinematic relationships prevents chain drive skewing, parasitic runout, and accelerated wear across the entire running gear.

Buying ZP 01.340 Sprockets from Zavod Moroza

Regardless of the specific configuration your grain thrower's running gear requires, Zavod Moroza provides a complete manufacturing and supply cycle for the parts you need. Our production facilities allow us to produce both strictly standardized serial elements according to original blueprints and adapted variants tailored to your farm's unique requirements. Contact our sales department for professional consultation—we will help you accurately select individual spare parts or supply a fully pre-assembled turnkey unit to guarantee the reliable and uninterrupted operation of your machinery!