Sprocket Shaft ZP 01.330 (ZM-60/60A)

Sprocket Shaft ZP 01.330 for Steering System of ZM-60/60A

The ZP 01.330 sprocket shaft is the primary drive element of the steering mechanism for classic ZM-60, ZM-60A series grain loaders, and their early modifications. In the overall kinematic scheme of the machine, this part acts as the primary driving assembly, which directly transforms the operator's manual effort into the mechanical movement of the unit's guidance system.

Structurally, the sprocket shaft is mounted on the vertical steering support of the grain loader's main frame, where the upper part of the shaft serves as a mounting base for the rigid attachment of the steering wheel (handwheel), and the small gear sprocket integrated into the part works in tandem with a roller drive chain with a pitch of 19.05 mm (PR-19.05-31.8). Receiving torque from the handwheel, the sprocket shaft pulls the chain, which transmits this force to the large driven sprocket of the front travel system, forcing the support wheels to turn.

The main engineering task of this part is to ensure reliable, precise, and uninterrupted transmission of force to turn the massive wheel strut, guaranteeing confident and stable maneuvering of the heavy grain loader on threshing floor areas or inside grain warehouses.

Technical Specifications of Steering Sprocket Shaft (ZP 01.330)

• Catalog number: ZP 01.330
• Part type: Welded drive shaft of the control mechanism
• Sprocket parameters: 10 teeth (z=10), pitch for chain PR-19.05-31.8
• Product weight: 2.2 kg
• Installation location: Vertical steering support (on the main frame of the unit)

Structurally, the ZP 01.330 sprocket shaft is a long cylindrical shaft to which a small 10-tooth driving sprocket is rigidly welded. A feature of this part is that the gear rim is welded at a strictly defined distance along the axis of the shaft — this distance is calculated so that after the shaft is lowered into the vertical tubular steering support (which is rigidly welded into the machine's frame), the sprocket ends up just slightly above the upper edge of this guide tube. This height positioning is important for kinematics — it ensures an ideal horizontal plane for the operation of the PR-19.05-31.8 drive chain, guaranteeing force transmission to the front travel system without misalignment or links slipping off.

The upper part of the shaft serves as a mounting base for attaching the steering handwheel and has several structural design options that depend on the generation of the equipment. Classic shafts most often feature holes for M10 mounting bolts (or special pins/axles) that pass straight through the handwheel body. However, such a bolted or pinned connection often cannot withstand sudden jerks and works in shear, which is why shafts with milled keyways that hold torque better are quite common in practice.

Regarding the features of this part for our modern ZM-60U/90U/120U loaders, we use a comprehensive and reliable approach to attaching the handwheel. Our modern shafts feature a keyway (sized 8x7x50), which takes on the main torsional load when rotating the heavy unit. To ensure the handwheel (in our new units, this is the reinforced OVI 01.022.006 option borrowed from the OVS-25) is securely locked against vertical displacement, our design additionally provides holes for a locking bolt and cotter pins (e.g., 2.5x25 or 3.2x40) — this combined solution (key for rotation + bolt/cotter pin for axial retention) completely eliminates the problem of enlarged holes and guarantees the absolute absence of play in the steering column.

Adjacent Assemblies and Parts of the Classic ZP 01.330 Sprocket Shaft

Since the sprocket shaft is the primary transmission element of the control system, its replacement or overhaul usually requires inspection of related contact parts of the steering mechanism. The main adjacent components for classic ZM-60 and ZM-60A loaders include:

• Handwheel N 067.027
• Drive chain PR-19.05
• Steering sprocket ZP 01.402
• Corresponding fastening elements

Recall that according to the factory passport regulations for the classic ZM-60, there are two important practical requirements for operating this machine. First, to reduce the torque effort on the sprocket shaft and minimize physical load on the handwheel, turning the guide wheel is recommended while the unit is in motion. Attempts to turn the massive wheel strut in place (statically) create extreme resistance, which over time leads to the shearing of locking elements or the deformation of mounting holes on the shaft. Second, when preparing the unit for towing across the threshing floor area, the front wheel must be turned 180° using the handwheel — this ensures correct rolling geometry (the caster effect) and prevents uncontrolled wobbling of the front strut while towing the machine.

Since the geometry of the frame and steering supports on many grain loaders has been modified over decades of operation and repairs, factory standards do not always ideally fit a specific machine. Therefore, we have the ability to manufacture the ZP 01.330 sprocket shaft with individual linear parameters, where necessary changing the overall length of the shaft itself or welding the driving 10-tooth sprocket higher or lower along the axis to ensure perfect planar alignment with your driven sprocket and prevent chain misalignment. In addition, to make steering the massive unit easier, a kinematic modernization of the assembly is possible — upon request, we can manufacture a shaft with a larger driving sprocket or equip the column with an increased-diameter handwheel, which will act as a larger lever and allow the operator to turn the unit with less physical effort.

Buy Sprocket Shaft ZP 01.330 for ZM-60

The many years of manufacturing experience of Zavod Moroza are built on constant technical dialogue with machine operators and chief engineers of agricultural enterprises. We carefully collect and analyze feedback from real operating conditions of equipment on threshing floors, which allows our experts to thoroughly understand the wear mechanics of components in classic ZM-60 and ZM-60A series machines. Even when manufacturing standard parts of previous generations, we rely on strict linear tolerances, precise spatial positioning of welded elements, and the use of metal with the necessary margin of safety.

By deciding to buy the ZP 01.330 sprocket shaft directly from our enterprise, you are investing in a reliable and geometrically verified drive element. The correctly maintained welding height of the 10-tooth sprocket guarantees smooth operation of the steering chain without slipping or misalignment, and high-quality axis metal ensures high resistance to constant torsional loads when maneuvering the heavy unit.

Contact our technical department to discuss the details of your order! Our specialists are well-versed in the specifics of steering columns for equipment from different production years and will help select or individually adapt the shank and other parameters of the part specifically for the handwheel or frame of your particular machine. Install reliable drive components from the direct manufacturer to eliminate parasitic steering play and restore predictable, precise, and stable handling to your grain loader for many working seasons to come.