Sprocket Shaft ZP 01.330 for ZM-60U/90U/120U

Sprocket Shaft ZP 01.330 for ZM-60U/90U/120U Grain Loaders

The ZP 01.330 sprocket shaft is a drive component of the steering system in the design of modernized ZM-60U, ZM-90U, ZM-120U series grain loaders and their hopper modifications, which is also compatible with classic grain loaders of previous generations, the ZM-60/60A. In the machine's kinematic chain, this part plays the role of a basic transmission link — it directly receives rotational force from the OVI 01.022.006 handwheel and transmits it via a small driving sprocket to the PR-19.05-31.8 roller drive chain, which sets the turning direction for the two-wheel front travel strut.

The part is mounted into a vertical tubular steering support fixed to the main frame of the unit. Given that modern high-performance grain loaders have a greater mass, the steering mechanism is subjected to high torsional loads during maneuvering. To ensure reliable force transmission, the upper mounting shank of the sprocket shaft is designed for a robust keyed connection. This mounting configuration allows the handwheel to be rigidly fixed, preventing parasitic play when changing the direction of movement. The main engineering task of this part is to guarantee precise, uninterrupted, and predictable control over the turning of the heavy machine during its operation or transportation across threshing floor areas.

Technical Specifications of Steering Sprocket Shaft (ZP 01.330)

• Catalog number: ZP 01.330
• Application: ZM-60U, ZM-90U, ZM-120U, ZMB-90U, ZMB-120U (+ ZM-60/60A)
• Component type: Steering column drive shaft with integrated sprocket
• Sprocket parameters: 10 teeth (z=10), adapted for PR-19.05-31.8 roller chain
• Handwheel mounting seat: Milled keyway 8x7x50 GOST 23360-78
• Compatible handwheel: Reinforced handwheel OVI 01.022.006

Structurally, the ZP 01.330 component is an elongated steel shaft to which a small 10-tooth driving sprocket is rigidly welded at a defined height. Precise spatial positioning of the gear rim along the axis is an important parameter because, after lowering the shaft into the tubular steering support secured to the machine's frame, the sprocket ends up in an ideal horizontal plane relative to the large driven sprocket of the front travel system. This ensures correct linear kinematics of the PR-19.05-31.8 roller chain, completely eliminating its misalignment, excessive lateral wear, and the risk of jumping off during maneuvering.

The main engineering feature of the modernized sprocket shaft is concentrated in its upper mounting shank, which is adapted for installing the reinforced, massive OVI 01.022.006 handwheel. To reliably transmit the high torque required to turn the heavy two-wheel base of the unit, a full-fledged keyway sized 8x7x50 is milled onto the shaft — it is this keyed connection that takes on all the primary torsional loads from the operator's hands, providing rigid steering fixation. Additionally, to prevent the handwheel from shifting vertically upward along the axis during intensive operation or travel over uneven terrain, an aperture is provided on the shank. A locking hardware element (bolt or cotter pin) is mounted through it, securely holding the handwheel in place. This comprehensive, combined fastening makes the steering assembly extremely durable and guarantees the absence of parasitic play.

Related Parts and Components of Sprocket Shaft ZP 01.330

Since the sprocket shaft is the primary transmission element in the steering system, its correct operation directly depends on the condition of adjacent assemblies. During inspection or replacement of this part on modern units (ZM-60U/90U/120U), the following contact components must be checked:

• Handwheel OVI 01.022.006
• Key 8x7x50 (GOST 23360-78)
• Steering support ZP 01.011.3.100
• Steering chain PR-19.05-31.8
• Sprocket ZP 01.402
• Retaining hardware and fasteners

Operational Reliability of the Keyed Assembly

In the harsh realities of threshing floors, where operators often have to turn massive equipment on uneven concrete or inside tight grain warehouses, the steering attachment experiences critical torsional loads. The design decision to use a full-fledged keyed connection on the ZP 01.330 shank guarantees that the operator's effort is distributed over a significantly larger metal contact area — this completely eliminates the risk of shearing fasteners and ovalizing mounting holes, providing a rigid, monolithic steering feel without any parasitic play over many years of intensive operation.

Although the ZP 01.330 part is produced as a serial standard for our modern product line, we understand that it is often ordered for installation on machines following various retrofits. If the geometry of your steering column or frame has been altered, our specialists can manufacture the part with custom linear parameters. If necessary, we can lengthen or shorten the steel shaft itself, weld the sprocket higher or lower than the standard factory mark, or replace it with another. All of this allows it to be perfectly aligned in the same horizontal plane as your ZP 01.402 driven sprocket, reducing the required effort while avoiding drive chain misalignment, constant slipping off, or the risk of breakage during maneuvering.

Buy Sprocket Shaft ZP 01.330 at Zavod Moroza

The many years of manufacturing experience of Zavod Moroza are built on close technical dialogue with chief engineers and machine operators of agricultural enterprises. By analyzing the vulnerabilities of classic equipment directly under real threshing floor conditions, we purposefully improve components that experience the highest loads. The modernized ZP 01.330 sprocket shaft is the result of this engineering approach — replacing outdated pin fastening in favor of a full-fledged keyed connection has permanently resolved the problem of battered mounting holes and parasitic steering play.

By choosing to purchase the reinforced ZP 01.330 sprocket shaft directly from our enterprise, you receive a reliable drive element manufactured in strict compliance with geometric tolerances. High-quality axis metal and correct spatial positioning of the gear rim guarantee stable chain drive operation, preventing misalignment when maneuvering a heavy unit.

Contact our technical department to select components! We understand the steering mechanisms of grain loaders across all generations down to the smallest nuances and will help you choose parts guaranteed to fit your machine. You can order either a separate sprocket shaft for routine maintenance or a fully equipped steering assembly complete with the reinforced OVI 01.022.006 handwheel, steering sprocket band brake elements, and a new drive chain. Install original modernized spare parts from the direct manufacturer to restore perfectly precise, effortless, and dependable handling to your machine for years to come.