HT250 is a grade of gray cast iron that is often used in the manufacturing of bearings, particularly those that are self-lubricating. The HT in HT250 stands for “gray cast iron,” and the 250 indicates that the material has a minimum tensile strength of 250 MPa. This material is known for its good tensile strength, wear resistance, and castability. When used in bearings, HT250 is typically combined with graphite to create self-lubricating properties.

HT250 Material Graphite Bearing Properties

Base Material: The foundation of these bearings is HT250 cast iron, which is often enhanced with solid lubricant inserts, predominantly graphite, to improve its performance.

Key Features: These bearings are designed for heavy-duty tasks and excel in applications requiring reciprocating linear movements, thanks to the self-lubricating feature of graphite. This characteristic makes them highly effective in minimizing friction and wear under high-load conditions.

Dynamic Load Capacity: They are capable of supporting a dynamic load of approximately 60N/mm².

Hardness Level: The hardness of the base material ranges from HB180 to HB230, indicating a robust structure.

Friction Coefficient: Exhibits a low friction coefficient, under 0.18, facilitating smoother operation.

Operational Temperature Range: These bearings can withstand temperatures up to 400°C, making them suitable for use in high-temperature environments.

Maximum Operating Speed: The operational speed limit is set at 0.5m/s, balancing the material’s self-lubricating properties with mechanical stability.

Industrial Applications: Their robust design and high-performance characteristics make them suitable for a wide range of sectors, including heavy machinery, automotive, construction, and manufacturing, where durability and reliability are paramount.

JDB-4, HT250, Fe250, ASTM Class40 Bushing Materials: In the industrial sphere, ensuring the optimal functionality of machinery often hinges upon the precise, reliable performance of their components. This is particularly true for bearings, which are crucial in managing loads and facilitating motion. With materials such as JDB-4, HT250, Fe250, and ASTM Class40, we delve into the realm of high-load, low-speed bushings that are meticulously designed to withstand challenging operational environments.

“It is gray cast iron, a kind of pearlescent gray cast iron, mainly made of carbon, silicon, manganese, and a small amount of sulfur, and it is usually seen in industrial manufacturing, towers, stuffing boxes, gland, and other fields. It can also be used to make parts of industrial equipment, and is used in the manufacture of parts with strict strength because of its excellent wear resistance and heat resistance, and is also widely used in the construction industry because of its stable performance, low requirements for workers, and low cost.”

JDB-4: A Synthesis of Strength and Self-Lubrication: JDB-4 bushings exemplify the confluence of robustness and self-lubrication. Crafted for applications where high loads and low speeds are a constant, these bushings minimize friction and wear, thus elongating the service life of the machinery they are incorporated into. This translates to reduced maintenance, lower operational costs, and enhanced reliability in performance.

HT250 (Fe250): Ensuring Robustness in Rugged Environments: HT250, or its equivalent Fe250, is a gray cast iron material known for its impressive tensile strength, remarkable wear resistance, and excellent castability. When employed in bushings, HT250 ensures a stalwart performance, especially in scenarios where components are subjected to high loads, ensuring that the machinery operates efficiently and without unscheduled interruptions.

An oil-free bearing where a solid lubricant has been embedded in the cast iron base for use in low speed and with medium loads. HT250 is the grade of grey cast iron, HT stands for grey cast iron, HT is the abbreviation of grey cast iron, grey cast iron HT250 means the minimum tensile strength of ø30 specimen is 250MPa. Oil Free Slide Plates – Configure and purchase – bronzelube.com, High Quality Oil Free Bronze Cast Iron Slider Plates

Alloy Casting Bushing Manufacturer – China Alloy Castings Bushing,Gray Iron Bushing – Grey Iron Bearing Foundry! Drilling of compacted graphite iron bushing. It is a self-lubricating sleeve carbon graphite bushing, It applies to mining operations, paper mills, oil fields, and various kinds of professional machinery.

ASTM Class40: Versatility and Reliability

ASTM Class40 gray iron finds its place in numerous applications due to its notable hardness, excellent machinability, and superb wear resistance. When utilized in bushings, it ensures that they can handle substantial loads while maintaining a reliable, steady performance across various industrial applications, including those that involve low-speed, high-load scenarios.

High-Load, Low-Speed Bushing: A Closer Look at Its Significance

In numerous industrial contexts, machinery often operates under conditions of high load and low speed. Here, the significance of materials like JDB-4, HT250, and ASTM Class40 is amplified. These materials not only ensure that the bushings can handle the substantial loads but also that they provide a stable, reliable performance even under the strenuous conditions that such scenarios often present.

Material Excellence Facilitating Industrial Proficiency

JDB-4, HT250, Fe250, and ASTM Class40 not only exemplify the pinnacle of material engineering for bushings but also underscore how meticulous material selection is pivotal in ensuring the optimal, uninterrupted functionality of industrial machinery. These materials, with their distinct properties, craft a foundation upon which machinery can operate with enhanced reliability, reduced maintenance needs, and a pronounced lifespan, thereby facilitating seamless industrial operations across various sectors.