Front Travel Screw ZP 01.070 (Bare)

Front Travel Screw ZP 01.070 (Bare)

The front travel screw ZP 01.070 in its basic "bare" version (without a welded ratchet wheel, or the so-called "daisy wheel") is the central power shaft of the front travel adjustment mechanism used on our ZM-60U, ZM-90U, ZM-120U, ZMB-90U, and ZMB-120U grain loaders, as well as classic models like the ZM-60.

This massive steel shaft acts as the key load-bearing link for the entire lifting assembly. During the vertical movement of the inner fork with the support wheel, it bears the entire mass of the unit's heavy front section. Interacting with the special nut ZP 01.101, this threaded shaft serves as the foundation for the subsequent mounting of the ratchet drive, and its main task is to effectively convert the operator's physical effort from the handle into smooth and controlled vertical frame travel.

Thanks to its reliable trapezoidal thread, which creates a self-locking effect and prevents spontaneous unwinding under the machine's weight, the screw guarantees safe and stable operation. The proper condition of this part allows the operator to precisely adjust the front clearance height, ensuring the scraper feeders fit perfectly against the threshing floor surface for efficient grain intake. The absence of a welded ratchet in this configuration makes the part a universal blank for those who plan to use their own surviving ratchet wheel or mount a non-standard drive.

Technical Specifications of the Front Travel Screw ZP 01.070 (Bare)

• Catalog Number: ZP 01.070 (basic configuration without ratchet wheel)
• Application: ZM-60U, ZM-90U, ZM-120U, ZMB-90U, ZMB-120U + classic ZM
• Working thread type: Trapezoidal (self-locking)
• Shaft material: High-strength structural steel
• Design feature: Upper shank ready for independent "daisy wheel" welding
• Quantity per unit: 1 pc.
• Country of Manufacture: Ukraine

The operational reliability of the front travel adjustment mechanism is based on this power shaft's ability to withstand intense and constant axial loads, including operational vibration. The ZP 01.070 shaft is machined from durable rolled steel, on which a deep trapezoidal thread with a precisely calibrated pitch is formed. It is this thread profile that guarantees the self-locking effect, reliably holding the machine's mass and preventing spontaneous unwinding of the mechanism and frame sagging under its own weight. The absence of a welded ratchet wheel ("daisy wheel") leaves the upper part of the shaft empty, with the appropriate thread for an M16 nut, and fully prepared for welding work. This execution is a rational engineering solution for repairs in cases where the old ratchet wheel does not have critical tooth wear and can be transferred to a new axis, saving resources.

The design and geometry of the modernized screw are adapted for the increased static and dynamic loads characteristic of new-generation heavy units. The length of the threaded portion and the overall shaft profile create a reliable margin of working travel, which is sufficient for deep lowering of the feeders to the very surface or high raising of the frame when transporting the machine on uneven threshing floors. When deciding to independently mount an old ratchet onto this shaft, it is important to ensure strict perpendicularity of the daisy wheel relative to the screw axis. Only in the absence of angular misalignment and axial runout can the manual drive's reversible pawl engage evenly into the tooth slots, guaranteeing torque transmission without lever slippage under load.

Related Parts for Assembly and Repair Related to Screw ZP 01.070

Since this ZP 01.070 screw is supplied as a basic threaded blank, corresponding contact hardware is needed for full assembly of the lifting mechanism. First and foremost, this is the ratchet wheel (daisy wheel) Z-9, but during strut inspection, it is also recommended to check the condition of the following adjacent assemblies:

• Special nut ZP 01.101
• Lifting drive handle ZP 01.060
• Ratchet mechanism pawl ZP 01.401
• Inner guide fork ZP 01.040
• Outer support fork ZP 01.050
• Thrust bearing 8104 GOST 520-2002 (or thrust washers/bushings)
• Fixing elements: locking pins, cotter pins, and grease nipples

Real-world equipment operation often requires departures from factory blueprints. If your unit has undergone frame modernization or received non-standard larger support wheels, the basic working travel range of the screw may be insufficient for lowering the feeders fully to the surface. To solve this problem, shafts of modified length are manufactured — extended or shortened, adapted to the kinematics of a specific machine.

It is also possible to change the parameters of the threaded pair itself. If it is necessary to manufacture a shaft with a different thread profile or pitch, it is necessarily supplied with a matching special nut ZP 01.101. The nut itself is available in both the classic cast iron variant for anti-friction sliding and the reinforced steel version (with additional lubrication channels) for corresponding working conditions under extreme impact loads on uneven surfaces.

A separate practical solution is the modernization of the ratchet wheel mounting point. Instead of the classic round shank for rigid welding, the contact part of the shaft can be milled for a keyway, a square profile, or a hexagonal seat. This makes the assembly detachable — the daisy wheel is simply placed onto the profile and reliably fixed with a cap bolt or locking pin. This connection allows the operator to disassemble the front travel assembly faster, for example, to replace a sprocket or a worn ratchet right on the threshing floor using a regular wrench. At the same time, to achieve maximum monolithic strength under heavy-duty conditions, this profile connection can always be additionally welded with metal along the joint contour for maximum reliability.

Buy Front Travel Screw ZP 01.070 (Bare) from Zavod Moroza

Zavod Moroza is an enterprise where serial production of spare parts is built on the analysis of real operational practice. We have moved away from blindly copying outdated blueprints, understanding how the loads on equipment have increased under modern farming conditions. The manufacturing of the lifting screw undergoes technical control at every stage — from selecting high-quality steel to lathe-cutting deep trapezoidal threads with a verified pitch. Since this shaft is supplied as a basic blank without a ratchet wheel, its upper part undergoes precise geometric preparation — you receive a level base ready for direct mounting and welding of your own daisy wheel without any angular misalignment.

Knowing the value of time during the threshing season, we maintain a constant warehouse stock of basic ZP 01.070 screws and all related undercarriage components. Compliance with linear tolerances ensures the interchangeability of our parts with grain loader mechanisms of various production years and manufacturers. At the same time, we have the production capacity to fulfill individual requests — if your equipment has undergone modifications, has a rebuilt frame, or non-typical larger support wheels, our specialists will promptly machine a power shaft in an extended or shortened version to fit your specific unit's configuration.

Contact our sales department to select components. We are well-versed in the structural nuances of lifting mechanisms of different generations and will help you select the parts needed for a proper machine repair. But remember the proven rule of mechanics — for long-lasting assembly operation, a new screw must be installed in a pair with a new special nut ZP 01.101 so that the remnants of old threads do not abrade the fresh metal. Order reliable spare parts directly from the manufacturer to quickly return the mechanism to its original ease of adjustment and ensure stable holding of the machine's working height under any load.