Cermet Bushing 40x50x24 for Front Travel Central Joint

Cermet Bushing 40x50x24 for Front Travel Central Joint

The 40x50x24 cermet bushing is a specialized sliding bearing that serves as the main anti-friction element in the central pendulum joint of the modernized two-wheel front travel system of ZM series grain loaders manufactured by us. Its design and material are technically optimized for operation under extreme radial loads while maintaining the compact dimensions of the assembly itself.

In the overall kinematic scheme of the reinforced two-wheel travel system, these bushings are rigidly press-fitted directly inside the central through-hole of the massive balancer wheel axle OVI 01.023. Through them, serving as a guiding support base, passes the smooth central neck of the ZP 01.601 axle, which has a corresponding working diameter of 40 mm. To ensure the necessary contact area, reliability, and correct centering, a pair of such bushings (2 pcs) is mounted on one unit.

The main engineering task of the 40x50x24 cermet bushings is to guarantee easy and unobstructed oscillation (pendulum movement) of the massive balancer bridge in the transverse plane. They absorb the static pressure from the weight of the entire front frame and harsh dynamic impacts during machine movement. Thanks to their operation, the two-wheel base softly tracks the irregularities of the threshing floor, stably maintains the unit's balance, and completely prevents destructive metal-on-metal friction between the two main axes of the pendulum strut.

Technical Specifications of Cermet Bushing 40x50x24

• Part type: Radial sliding bushing
• Inner working diameter: 40 mm (for the ZP 01.601 axle working neck)
• Outer mounting diameter: 50 mm (for press-fitting into the balancer axle OVI 01.023)
• Length (width): 24 mm
• Material: Iron-graphite cermet (powder mixture)
• Installation location: Central through-hole of the balancer wheel axle OVI 01.023
• Quantity for modernized two-wheel travel: 2 pcs

The material used to manufacture these bushings is an iron-graphite composition obtained via powder metallurgy. This choice of material is engineering-justified for the central joint, as it is regularly subjected to high static pressure from the frame's mass and harsh radial impacts while the equipment moves over uneven concrete. Iron-graphite has a porous structure that works like a sponge - the bushing is capable of absorbing and retaining grease (which is supplied to the assembly through the standard M10x1 grease nipple). The presence of graphite acts as a natural solid lubricant, creating a reliable anti-friction pair with the smooth steel neck of the ZP 01.601 axle and protecting it from galling even during intensive pendulum operation.

A pair of 40x50x24 cermet bushings is rigidly press-fitted from opposite sides into the central through-channel of the massive balancer axle OVI 01.023. By spacing these two support points at the edges of the mounting channel, a reliable and wide spatial base is formed to hold the 40 mm diameter central shaft - this configuration prevents pendulum bridge misalignment, ensures perfect coaxiality, and guarantees even load distribution on both bushings. The inner surface of the installed bushings functions as a sliding plane, allowing the balancer axle to softly oscillate around the central shaft. The precise interference fit of the cermet during press-fitting into the steel body of the strut eliminates parasitic radial play, maintaining the necessary rigidity of the entire pendulum joint for stable machine maneuvering.

Related Components of the Central Pendulum Joint

Since the pair of 40x50x24 cermet bushings works in a closed sliding system, the entire contact group of parts ensuring the pendulum's operation must be inspected during assembly diagnostics:

• Balancer wheel axle OVI 01.023
  A massive load-bearing beam, into the central through-channel of which the cermet bushings are rigidly press-fitted.
• Axle ZP 01.601
  A central smooth shaft with a diameter of 40 mm that passes through the bushings and serves as the direct working sliding surface.
• Internal fork ZP 01.040
  A movable strut that fixes the central axle ZP 01.601 through its own openings, holding the pendulum bridge.
• Grease nipple (type 1 M10x1 GOST 19853-74)
  A technological channel for supplying grease inside the friction assembly.

The geometry and kinematics of this joint have undergone an evolution based on the harsh realities of field operation. For a long time, the standard for this assembly was the installation of a pack of four needle roller bearings inside the OVI 01.023 axle. Although needle roller bearings perfectly withstand high radial pressure within minimal dimensions, their thin design proved vulnerable to the specifics of threshing floor operations. The thin needle rollers rolled directly on the ZP 01.601 axle metal, and the slightest oil starvation or ingress of abrasive dust quickly led to cage destruction and needle shedding. After that, the steel axle would begin to rub "dry," forming deep wear and critical radial pendulum play. The transition to using two 40x50x24 cermet bushings instead of four needle bearings was an engineering-justified step to increase the survivability of the entire front strut. The iron-graphite composition has no small moving parts that can disintegrate inside the structure, and it is significantly more forgiving of irregular greasing and harsh impact loads from concrete irregularities.

When replacing bushings, it is important to inspect the working neck of the ZP 01.601 axle - if your unit previously operated on needle bearings that disintegrated, or if the old bushings wore down to the metal, grooves or scoring will inevitably remain on the central shaft, or a noticeable reduction in diameter will occur. Installing new cermet bushings on such a damaged axle is strictly prohibited - an uneven surface will very quickly grind down the cermet from the inside due to uneven pressure distribution; in such a case, the ZP 01.601 axle must be replaced in pairs along with the bushings.

It is also worth remembering that cermet is sensitive to impact deformations during seating. Bushings must be press-fitted into the massive balancer axle OVI 01.023 exclusively using a press or a perfectly fitted guide mandrel - direct hammer blows to the end of the part can crack it even before it is mounted on the grain loader.

Buy Cermet Bushings 40x50x24 and Ready-to-Install Assemblies from Zavod Moroza

To completely eliminate the human factor and avoid the risk of cracking fragile parts during independent installation, a rational solution is to order the massive balancer axle OVI 01.023 with a factory-pre-pressed pair of cermet bushings. In this format, part seating is performed using industrial hydraulic equipment, which guarantees strict adherence to all tolerances during press-fitting, verified tension, and perfect coaxiality.

The manufacturing strategy of Zavod Moroza is based on constant engineering improvement of parts based on the real-world practice of operating agricultural machinery. We help avoid complex "garage" press-fitting procedures by supplying both high-quality individual consumables and thoughtful, comprehensive solutions that save the mechanic's time and stress. You can buy 40x50x24 cermet bushings from us in any quantity, order an axle with sliding bearings already installed, or choose a fully assembled front travel pendulum bridge for immediate repair.

Our technical department analyzes the mechanics of every failure in detail to propose the most rational path for restoring the machine's factory characteristics. Contact our specialists to select components! Order reliable cermet bushings and axles directly from the manufacturer to restore ideal tightness to your grain loader's central joint without parasitic play, ensuring the massive unit again confidently holds its balance and softly tracks the threshing floor terrain as a unified, responsive, and durable mechanism.