RC411 - 21903: A Crucial Carrier Roller for Kubota Excavators

In the dynamic and demanding world of construction and excavation, the seamless operation of heavy machinery is of utmost importance. Kubota excavators, renowned for their reliability and efficiency, rely on a multitude of high - quality components to maintain peak performance. One such essential part is the RC411 - 21903 carrier roller, which plays a pivotal role in the undercarriage system of specific Kubota excavator models.

The RC411 - 21903 is engineered with precision to be compatible with a wide range of Kubota excavator models. This includes the KX033 - 4, KX71 - 3 (both cabin and canopy versions), KX71 - 3S (cabin and canopy), KX91 - 3, KX91 - 3S, KX91 - 3S2, U25 - 3S, U25S, U25S(CA), U35, U35 - 3, U35 - 3S, U35 - 3S2, U35 - 4, U35S, and U35 - S2CA. This extensive compatibility makes it an ideal choice for Kubota equipment owners and operators, whether they are working on small - scale residential projects or large - scale commercial construction sites. For example, if you manage a fleet of Kubota excavators with different models, having the RC411 - 21903 in your parts inventory can simplify maintenance and replacement processes, as it can be used across various machines.

As a carrier roller, the RC411 - 21903 serves several critical functions within the undercarriage system of Kubota excavators. Its primary role is to support the weight of the upper structure of the excavator and distribute this load evenly across the tracks. This even load distribution is crucial for preventing premature wear and tear on the tracks and other undercarriage components. When the excavator is in operation, the RC411 - 21903 rolls along the tracks, guiding them and ensuring smooth movement. It helps to maintain the proper tension in the tracks, preventing issues such as track slippage, misalignment, and derailment. A well - functioning carrier roller like the RC411 - 21903 is essential for maintaining the stability and control of the excavator, especially when working on uneven terrains. In addition, it helps to reduce vibrations and shocks that can be transmitted through the undercarriage, which can otherwise cause damage to the machine's structure and components over time.

Constructed from high - quality materials, the RC411 - 21903 is built to withstand the harsh conditions of construction sites. Many models of this carrier roller are made from carbon steel, which offers excellent strength and durability. For instance, some aftermarket versions are forged from carbon structural steel (S45C), and the forging process enhances the material's integrity, ensuring it can endure the constant stress and heavy loads associated with the operation of Kubota excavators. The surface of the roller is often treated to increase its hardness. Some rollers have a surface hardness of HRC 52 - 56, which makes them highly resistant to wear and abrasion. This is particularly important as the roller constantly comes into contact with the tracks and the ground, and a hard - wearing surface ensures a longer lifespan.

Moreover, the RC411 - 21903 is designed with high - quality seals. Nitrile butadiene rubber (NBR) seals are commonly used, which provide excellent lubrication and oil retention. These seals play a crucial role in preventing dirt, mud, and grime from entering the bearings of the roller. By keeping contaminants out, the seals help to maintain the smooth operation of the roller and extend its service life. The use of such high - quality materials and construction techniques means that the RC411 - 21903 can provide reliable performance even in the most challenging working environments.

The price of the RC411 - 21903 can vary depending on several factors, including the supplier, the quantity purchased, and whether it is an aftermarket or OEM (Original Equipment Manufacturer) part. On average, aftermarket versions can range from approximately $118 to $200 per unit. For example, Tampa Sport Bikes offers the XYO RC411 - 21903 carrier roller for $118, while Solid Tires and Tracks sells it for $200. Some suppliers may also offer bundle deals or discounts for bulk purchases. For instance, Mytee Products sells a 2 - pack of the forged top roller RC411 - 21903 for $139.49.

In terms of availability, the RC411 - 21903 is widely available from various aftermarket parts suppliers. Well - known online sources such as FridayParts, Huparts, Mytee Products, Solid Tires and Tracks, and Tampa Sport Bikes carry this carrier roller. FridayParts has it in stock for $149.90, with detailed product information including replacement part numbers and compatible Kubota models. Huparts also offers it with fast delivery options. Additionally, online platforms like eBay and specialized construction equipment parts websites may also have the RC411 - 21903 available, providing a variety of options for buyers to choose from. Some suppliers may offer additional services such as free shipping (for example, to commercial addresses in the lower 48 states in the US by Solid Tires and Tracks), which can further reduce the cost for buyers.

The RC411 - 21903 carrier roller is an essential component for maintaining the optimal performance of Kubota excavators in the KX033 - 4, KX71 - 3, KX91 - 3, U25, U35, and related series. Its wide compatibility, crucial function in the undercarriage system, durable construction, and reasonable pricing make it a top choice for equipment owners and operators. By investing in a high - quality replacement part like the RC411 - 21903, construction companies and individuals can ensure that their Kubota excavators continue to operate efficiently, reducing downtime and maximizing productivity on construction projects. So, if you are in need of a replacement carrier roller for your Kubota excavator, consider the RC411 - 21903 for its reliability and performance - enhancing features.