ZM 07.105 (25x32x45) Central Cermet Cross Spider Bushing

ZM 07.105 (25x32x45) Central Cermet Cross Spider Bushing

The ZM 07.105 cermet bushing is an elongated through-type plain bearing bushing designed for press-fitting into the central cylindrical bore of the ZP 07.609 differential cross spider housing. It serves as the primary support bushing for the central axis, ensuring precise centering, free rotation, and a minimal friction coefficient as the shaft or half-axle elements pass through the core of the differential mechanism. This component has a length of 45 mm, providing a full contact area and enabling it to withstand high radial and overhung loads during grain thrower maneuvering. The design of a single differential assembly incorporates 1 central ZM 07.105 bushing.

Technical Specifications of the ZM 07.105 Bushing

• Catalog number - ZM 07.105
• Purpose - central plain bearing support in the ZP 07.609 cross spider housing
• Dimensions (inner Ø x outer Ø x length): 25x32x45 mm
• Material - sintered anti-friction cermet according to GOST 2795-2001 (based on an iron-graphite powder alloy)
• Material properties - porous microstructure with high oil retention capacity and a self-lubricating effect
• Application - travel axle differentials ZM120 06.100.000-05 (ZM-120U), two-speed self-propelled gearboxes with differential ZP 07.100.000 (ZM-60U / 90U), as well as classic ZP 07.000 gearboxes (ZM-60)
• Mating parts - seating bore of the ZP 07.609 cross spider housing (Ø32 mm) and central shaft / axial element (Ø25 mm)
• Quantity per assembly - 1 pc.
• Country of manufacture - Ukraine

Due to the use of porous cermet, the bushing absorbs liquid lubricant from the oil drum or gearbox housing and evenly delivers it to the friction zone. This eliminates dry friction, prevents scoring on the hardened shaft surfaces, and ensures quieter, easier, and smoother operation of the bevel group.

Design Features and Evolution of Grain Thrower Differential Assemblies

In older self-propelled gearbox modifications, solid cast iron or bronze bushings were frequently utilized instead of sintered cermet. They required a constant supply of oil, and at the slightest oil starvation, they rapidly overheated, causing metal burning and surface wear. The adoption of a modern 45 mm cermet bushing configuration radically enhanced the reliability of the central support. The increased length evenly distributes pressure along the working journal, preventing misalignment and protecting the entire cross spider assembly from premature bore wallowing.

Inspection and Replacement Recommendations Associated with the ZM 07.105 Bushing

During a major differential overhaul or cross spider reassembly, the condition of the central bushing is checked alongside the side gear bushings. Signs of ZM 07.105 central bushing wear that require replacement include:

• Appearance of radial play (rocking) of the shaft within the central cross spider bore
• Ellipticity (bore wear in one direction due to constant load orientation)
• Chipping, cracking, or crumbling of the cermet layer along the bushing ends caused by operation with contaminated oil or metal debris

If disassembly reveals that not only the bushing but also the cross spider housing bores or pins are worn, the most cost-effective and rapid solution is to install the complete ZP 07.110.000 cross spider assembly. In this case, you receive a fully adjusted factory unit with pre-pressed cermet bushings (1 central ZM 07.105 and 2 side gear ZM 07.105-01 bushings).

Buying the ZM 07.105 Cermet Bushing from Zavod Moroza

By ordering ZM 07.105 cermet bushings directly from Zavod Moroza, you receive original components featuring precise dimensional compliance and superior anti-friction properties, which our specialists install daily during the assembly of our proprietary agricultural machinery's travel systems. We have practically studied all the intricacies and nuances of these plain bearings under real field conditions, allowing us to thoroughly understand this subject and always stand ready to assist with precise component selection.

Need advice on differential inspection or checking dimensions of associated parts? Call our engineers or submit an inquiry on our website - we will guide you to the correct solution and promptly dispatch the required spare parts via Nova Poshta directly from our factory warehouse!