ZP 01.627 Reverse Gear Shaft

ZP 01.627 Reverse Gear Shaft for ZM-60 Grain Thrower

The ZP 01.627 shaft is a ZP 01.220 reverse drive half-axle utilized on classic ZM-60 grain thrower models. The component is installed on one side (the right side) of the running gear and serves to provide a constant, rigid transmission of torque from the self-propelled drive sprocket directly to the driving wheel hub. Unlike the adjacent shaft, this element is manufactured without a disengagement mechanism (jaw clutch) and ensures an unbroken connection between the wheel and the transmission.

The factory kinematics of classic ZM-60 machines are built upon an asymmetric drive layout. Because the self-propelled gearbox on these machines featured an internal differential, a mechanic only needed to disengage the drive on one side (the left side)—using the ZP 01.625 shaft and disconnection clutch—to freely roll or tow the unit. The second half-axle, the ZP 01.627 shaft, remains "blind" (rigidly fixed) within the wheel hub. Although modern modernized grain throwers have shifted toward a symmetric layout featuring two identical shafts with clutches, the ZP 01.627 shaft remains an essential part for servicing and repairing thousands of classic machines still operating in the field.

Technical Specifications of the ZP 01.627 Shaft

• Catalog number: ZP 01.627
• Application: ZM-60 (classic model)
• Installation assembly: Rear drive ZP 01.220 (fixed driving wheel half-axle)
• Purpose: Constant rigid torque transmission from the self-propelled gearbox to the wheel hub without disengagement capabilities
• Bore diameter: 30 mm
• Material: Structural carbon steel (Steel 35)
• Weight: 4.33 kg

The shaft features two extended keyways milled onto the working sections of this 30 mm steel rod to ensure reliable torque transmission at both ends. The first keyway is designed to secure the ZP 01.360 reverse drive sprocket, which receives motion from the self-propelled gearbox, while the second keyway is responsible for transferring torque directly to the ZM 01.104 driving wheel hub.

A milled longitudinal flat (pad) for the locking plate is a distinguishing feature of this shaft, ensuring its rigid fixation within the running gear. A ZP 14.502 steel plate is placed over this precise flat surface and bolted directly to the flange of the ZM 01.104 hub using two M8x16 bolts. This design securely anchors the half-axle inside the hub, creating a rigid, unbroken drive without utilizing any moving clutches, springs, or auxiliary locking pins.

Associated Parts of the ZM 01.627 Reverse Shaft for ZM-60

Because the ZP 01.627 shaft serves as a fixed drive half-axle in the asymmetric running gear of classic ZM-60 grain throwers, it operates alongside a dedicated set of components lacking manual travel-disengagement features. When ordering or inspecting this part, the following associated components must be checked:

• Wheel hub ZM 01.104
• Locking plate ZP 14.502
• Drive sprocket ZP 01.360 (Z=25, t=19.05 mm)
• Support bearing assemblies (11206 bearings in H 026.058 housings with covers)
• Running wheel ZPT 1.6.2

The primary characteristic of the ZP 01.627 shaft kit is that all adjacent components are designed for a rigid, unbroken connection. Unlike the left half-axle, which features a complex jaw disengagement assembly, this side utilizes a smooth ZM 01.104 hub—it completely lacks end teeth/jaws and bolts down firmly via the ZP 01.4502 plate directly onto the milled flat of the shaft. Similarly, the ZP 01.360 drive sprocket features a specialized keyway fit unique to this shaft, distinguishing it from the sprocket on the opposite side.

The asymmetric layout featuring the fixed ZP 01.627 shaft and ZM 01.104 hub was engineered in Soviet times for designs utilizing corresponding single-speed gearboxes with internal differentials. However, during extended operation and overhauls, many farming operations chose to completely abandon this layout in favor of a symmetric design. Zavod Moroza has long since transitioned its manufacturing to produce ZM-60U and ZM-90U grain throwers featuring a symmetric drive, where identical shafts with jaw clutches are installed on both sides—allowing the transmission to be fully disengaged during towing, protecting the gearbox from wear and simplifying unit maneuverability on the threshing floor.

Buying the ZP 01.627 Shaft from Zavod Moroza

Whichever repair concept you choose for your grain thrower, the specialists at Zavod Moroza will help you execute it at the highest level. We continue to manufacture precise original ZM 01.627 shafts, ZM 01.104 hubs, and ZP 14.502 plates for those wishing to preserve the classic factory design. At the same time, we can supply a complete parts kit or a pre-assembled reverse gear unit to convert your machine to a modern symmetric layout, including a two-speed gearbox or even a gear motor. Contact our sales department for professional consultation—we will select reliable direct-from-manufacturer components tailored perfectly to your farming operation's needs!