High Carbon Steel Bushing Made of 42CrMo4 Bearing Bushing, Carbon steel for machine structure alloy steel [C45, 42CrMo4)

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Custom-Made Steel 42CrMo4/ c45 Bearing Bushing

The 42CrMo4 bearing bushing, crafted from high-strength, low-alloy steel, is designed for demanding industrial applications that require superior strength, toughness, and wear resistance. This steel bearing is ideal for conditions involving heavy loads, high temperatures, and corrosive environments. Notably recognized for its mechanical robustness, the 42CrMo4 steel can be hardened and tempered to attain significant surface hardness, enhancing its resistance to wear and corrosion.

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Type Of Bearing

GROOVE TYPE STEEL HARDENED BUSHINGS WITH SELF LUBRICATION

Understanding the 42CrMo4 Alloy Steel Bushings: Groove Types and Their Applications

Available in multiple sizes and configurations, the 42CrMo4 bearing bushing can be tailored to specific application needs, including custom dimensions, material types, and desired levels of hardness and wear resistance. This versatility makes it suitable for a wide array of uses across various sectors, such as machinery manufacturing, construction of buildings and bridges, and production of vehicles and other transportation equipment.

42CrMo4 alloy steel, known for its robust strength and wear resistance, is a popular choice for bushings in mechanical systems. A critical feature in the design of these bushings is the inclusion of grooves, which play a vital role in lubrication and functionality. CHARACTERISTICS

  • Steel bushings are ideally suited for lubricated applications.
  • Available with either a plain or grooved sliding layer.
  • Specifically designed for grease lubrication.
  • Optimal for low rotation speed environments with high specific pressure.

Heavy-duty steel bushings featuring round oil pockets and oil ring grooves, made from AISI-4140 / AISI-4142, DIN 42CrMo4 hardened steel.

Renowned for its high quality and performance, the 42CrMo4 bearing bushing ensures durable and reliable service in numerous applications. Its popularity among manufacturers and engineers is owed to its exceptional mechanical properties and its capability to withstand tough operational conditions. In essence, the 42CrMo4 bearing bushing is a robust, low-alloy steel plain bearing, customizable and adaptable for diverse industrial uses where durability and resistance are paramount.

AVAILABILITY: Bearing forms are available in standard dimensions:

  • Plain cylindrical bushes
  • Custom-made bearing forms are also available:
  • Bearings with various lubrication grooves
  • Non-standard parts tailored to specific requirements
steel bushing
Hardened Steel Bushing Made with central, spiral or custom grease grooves

DIN 42CrMo4 Bushing Material Features:

Steel bushings and bearings are perfectly designed for your applications that require grease and oil lubrication. They are available with either a plain or grooved sliding layer to suit various operational needs.

Material Features:

  • Hardened steel bearings offer enhanced wear resistance, while the core remains ductile and crack-resistant.
  • Suitable for heavy machinery, hydraulic cushioning, and rotational applications.
  • The special alloy, enriched with manganese and vanadium, provides improved strength and toughness, accelerated hardening, and superior wear resistance.

Design Custom Aluminium bronzes Parts & International Standards: Search Our Material Alloy

20CrMo

20CrMo: This is an alloy steel containing about 20% chromium (Cr) and 1% molybdenum (Mo). It has good hardenability and hardness, often used for manufacturing high-strength mechanical parts.

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C45

C45: This is a medium carbon steel with approximately 0.42-0.50% carbon content. C45 steel has good mechanical properties and machinability, suitable for manufacturing various mechanical parts and tools.

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GCr15

GCr15: This is a bearing steel containing about 1.5% chromium. GCr15 steel has excellent wear resistance and hardness, primarily used for manufacturing bearings.

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20CrMnTi

20CrMnTi: This is a low alloy steel containing about 20% chromium, 1-2% manganese (Mn), and a small amount of titanium (Ti). 20CrMnTi steel has good strength, toughness, and wear resistance, commonly used for manufacturing automotive parts.

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35CrMo

35CrMo: This is an alloy steel containing about 35% chromium and 1% molybdenum. 35CrMo steel has excellent strength, toughness, and heat resistance, often used for manufacturing mechanical parts that operate under high temperature and high pressure.

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42CrMo

42CrMo: This is an alloy steel containing about 42% chromium and 1% molybdenum. 42CrMo steel has excellent strength, toughness, and heat resistance, commonly used for manufacturing high-strength, high-toughness mechanical parts.

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Design Custom Parts & High Carbon Steel Bushing for Excavators, made from 42CrMo4/40Cr steel.

Plain bearings, Hardened steel bushings are reinforced with a steel backing and feature an inner surface designed with a variety of lubrication-enhancing elements, including spiral oil grooves, oil rings, oil holes, as well as round and elliptical oil sockets. These bushings undergo quenching and tempering processes that enhance their surface roughness and wear resistance.

This product is primarily used in the engineering machinery sector and in applications requiring high wear resistance, with the capability to withstand heavy loads without cracking. In the design of certain mechanical parts (such as bearings), to improve lubrication, internal features like circular oil grooves and oil ring grooves are incorporated. These designs help maintain the flow of lubricating oil, reduce friction and wear, and extend the lifespan of the parts.

hardened-steel-bushing

  1. Material Composition: The bearing bush is made from a variety of steel materials, including C45, 40Cr, GCr15, and 42CrMo. These are all types of steel known for their strength and durability, which makes them suitable for use in bearing bushes.
    • C45: A medium carbon steel that offers good hardness and wear resistance after heat treatment.
    • 40Cr: A chromium alloy steel known for its toughness and high strength.
    • GCr15: A high-carbon chromium bearing steel, often used for its ability to maintain hardness at high temperatures and under heavy loads.
    • 42CrMo: A chromium-molybdenum steel that offers high strength and good toughness.
  2. Cross Oil Groove: The bearing bush has a cross oil groove machined into its interior. This feature is important as it allows for better lubrication of the bearing, which can reduce friction and wear, and extend the service life of the bush.
  3. Heat Treatment: After the manufacturing process, the bearing bush undergoes heat treatment. This process can significantly improve the hardness and wear resistance of the steel, which is crucial for parts that are subject to heavy loads and high levels of friction.
  4. Applications: The bearing bush is widely used in heavy machinery such as excavators, cranes, and other construction equipment. These are environments where reliability and durability are paramount, and the properties of the steel and the design of the bush make it well-suited for these applications.

If you’re looking for more detailed information on the manufacturing process, specifications, or the benefits of using these types of bearing bushes, feel free to ask!

Cross Reference of AISI-4140 / AISI-4142 / DIN 42CrMo4 Steel

Region Standard/Specification
EU EN 42CrMo4 (1.7225)
USA AISI 4140, AISI 4142
Germany DIN, WNr 42CrMo4
Japan JIS SCM440H
France AFNOR 42CD4
England BS 708M40, CFS11
Italy UNI 42CrMo4
Spain UNE 40CrMo4, F1252
China GB 42CrMo
Sweden SS 2244
Finland SFS 42CrMo4
Russia GOST 35KHM, 38KHM
International ISO 42CrMo4

 

AISI-4140 and AISI-4142 are both chromium-molybdenum alloy steels, and DIN 42CrMo4 is the corresponding grade under German standards. Here is a summary of the percentage range of their chemical compositions:

  • Carbon (C): 0.38 – 0.45%
  • Silicon (Si): Maximum 0.4%
  • Manganese (Mn): 0.6 – 0.9%
  • Phosphorus (P): Maximum 0.025%
  • Sulfur (S): Maximum 0.035%
  • Chromium (Cr): 0.9 – 1.2%
  • Molybdenum (Mo): 0.15 – 0.3%

The content of these alloying elements significantly affects the properties of the steel:

  • Carbon (C) increases the steel’s strength and hardness.
  • Silicon (Si) helps enhance strength and aids in deoxidation during the steelmaking process.
  • Manganese (Mn) increases the strength and toughness of steel, while also aiding in desulfurization and deoxidation.
  • Phosphorus (P) and Sulfur (S) are generally considered impurities, and lower concentrations are preferable, as they can reduce the steel’s ductility and toughness.
  • Chromium (Cr) improves the steel’s hardness, wear resistance, and corrosion resistance.
  • Molybdenum (Mo) increases the steel’s strength, hardness, and heat resistance, as well as its stability at high temperatures.

These steels are commonly used in applications requiring high strength, toughness, and wear resistance, such as connecting rods, gears, bearings, and some molds. With appropriate heat treatment, their mechanical properties can be significantly enhanced.

 

Here, we explore the different types of grooves used in 42CrMo4 alloy steel bushings and their specific applications.

1. Straight Grooves

Straight grooves are commonly used in bushings and are characterized by their linear pattern. These grooves are typically machined parallel to the axis of the bushing. They are designed to distribute lubricant evenly along the length of the bushing, ensuring consistent lubrication and reducing wear between the bushing and the mating component. This type of groove is ideal for applications where relative linear motion occurs, such as in hydraulic cylinders and linear actuators.

2. Spiral Grooves

Spiral grooves in bushings are designed to facilitate not only lubrication but also the removal of debris and contaminants from the bearing surface. These grooves create a helical path for lubricants, enhancing the distribution across the bushing during rotational movements. This design is particularly beneficial in rotary applications, such as in electric motors and rotating shafts, where it helps maintain a film of lubricant under dynamic load conditions.

3. Circular Grooves

Circular grooves, also known as annular grooves, are typically used in applications involving oscillating movements. These grooves are machined around the circumference of the bushing and help retain lubricant within the designated area. Circular grooves are effective in applications such as pivot joints and linkages, where the range of motion does not involve complete rotation or extensive linear travel.

4. Figure-Eight or Double Loop Grooves

These are specialized grooves that resemble the figure-eight shape and are used in applications requiring multi-directional lubrication paths. These grooves ensure that lubrication is supplied effectively to both rotational and axial movements, making them suitable for complex mechanical systems where the bushing experiences varied motion patterns.

Applications and Industries

Bushings with these various groove types are employed in a broad range of industries:

  • Automotive: Used in suspension joints, steering systems, and transmission assemblies.
  • Aerospace: Components in control mechanisms and landing gear.
  • Industrial Machinery: In hydraulic systems, rotating shafts, and moving arms where high load and high wear resistance are critical.
Performance Index Data
Product Name High Carbon Steel Bushing Made of 42CrMo4/40Cr, Tempered and Quenched Heat Treatment, Excavator Machine Bushing
Hardness 52~60 HRC
Max Dynamic Load 250 N/mm²
Max Linear Velocity 0.1 m/s
Max PV Value 1.5 N/mm²·m/s
Working Temperature Limit -100 to +350ºC
Linear Expansion Coefficient 1.1×10^-5 /ºC

Oil Grooves in Plain Bushes: Types and Functions

To enhance the functionality of plain bushes in mechanical systems, oil grooves are machined into these components to improve lubricant flow and sliding properties. According to DIN ISO 12128:1998 and various technical specifications, the design and implementation of these grooves are crucial for optimizing performance. They not only facilitate better lubrication but also play a significant role in carrying wear debris away from the sliding surfaces, thus extending the operational life of the bushing.

Types of Oil Grooves

The design of oil grooves can vary widely, with each type serving specific functional needs.

Indentations for Additional Lubrication

In addition to oil grooves, indentations such as round and elliptic pockets are also used to hold lubricant, further reducing friction and wear. These features are particularly beneficial in environments where lubrication needs to be retained over extended periods or in high-friction scenarios.

The strategic use of various types of oil grooves and indentations in plain bushes significantly enhances their performance by ensuring continuous lubrication and the efficient removal of wear debris. This customization allows for tailored solutions to meet the specific demands of different mechanical applications, ultimately leading to improved durability and efficiency of the machinery.

Conclusion

Choosing the right groove type for 42CrMo4 alloy steel bushings is essential for optimizing the performance and longevity of mechanical assemblies. Each groove type offers distinct benefits tailored to specific mechanical movements and operational conditions. Understanding these variations helps engineers and designers select the most appropriate bushing configuration, ensuring efficient and reliable operation of machinery across various industrial applications.

42CrMo4 bearing bushings are known for their superior mechanical properties, which include high strength, good toughness, and excellent wear resistance. These characteristics make them suitable for a wide range of applications where reliability and durability are crucial. Here are some typical applications for 42CrMo4 bearing bushings, as mentioned in your query:

  1. Earth Movement Machinery: In heavy equipment such as excavators and loaders, bearing bushings need to withstand substantial loads and abrasive conditions. The strength and wear resistance of 42CrMo4 make it an ideal choice for these applications.
  2. Drilling Machinery: Drilling equipment often operates in harsh environments and requires components that can handle high stress and resist wear. 42CrMo4’s properties make it suitable for use in such machinery.
  3. Farming Machinery: Components like power harrows, ploughs, and rear excavators in agricultural machinery experience significant wear and tear. The durability of 42CrMo4 bearing bushings contributes to the longevity of these machines.
  4. Equipment Attachments: Tools such as grabs, buckets, and grippers used in various heavy-duty applications can benefit from the strength and wear resistance of 42CrMo4 bearing bushings.
  5. Hydraulic Cylinders: To protect against wear, especially at the bottoms and eyelets of hydraulic cylinders, 42CrMo4 bushings are used to enhance service life and reliability.
  6. Industrial Washing Machines: As consumables in these machines, 42CrMo4 bushings can withstand the rigors of frequent use and the corrosive nature of detergents and water.
  7. Sliding Guides for Industrial Presses: The precision and durability required in industrial presses mean that components like sliding guides need to be made from high-quality materials. 42CrMo4 provides the necessary strength and wear resistance.
  8. Components for Suction Pumps: For sliding seats in pumps and sealing rings, the material must be able to operate smoothly under pressure. 42CrMo4’s properties make it a good fit for these components.
  9. Machine Tools and Automatic Machines: In precision machinery, the components must be able to maintain accuracy over time. 42CrMo4’s wear resistance and strength contribute to the longevity and reliability of machine tools and automatic machines.
  10. Pumps and Industrial Presses: These applications require components that can handle high pressure and resist wear. The use of 42CrMo4 bearing bushings can enhance the performance and lifespan of pumps and presses.

The 42CrMo4 steel’s combination of strength, toughness, and wear resistance makes it a versatile material for a variety of bearing bushing applications where performance under load and durability are key considerations.

Exploring the Self-Lubricating Bearing Guide Plate with Grease Groove for Shaft Bearing Bushing Made of 42CrMo4

In the realm of mechanical engineering and machinery design, the optimization of component functionality and longevity is a perpetual goal. A prime example of such innovation is the self-lubricating bearing guide plate with grease groove, specifically designed for shaft bearing bushings made of 42CrMo4 alloy steel. This guide plate not only simplifies maintenance but also enhances the operational efficiency and durability of machinery.

Material Excellence: 42CrMo4 Alloy Steel

The choice of 42CrMo4 alloy steel for the bearing guide plate is pivotal. Known for its robustness and excellent mechanical properties, 42CrMo4 is a high-grade chromium-molybdenum steel that offers superb strength, hardness, and wear resistance. These characteristics are critical in applications subjected to high stress and dynamic loads, typical of shaft bearing environments.

Design Innovations: Self-Lubricating Features

The self-lubricating bearing guide plate is ingeniously designed to reduce the need for frequent lubrication. This is achieved through the integration of a grease groove that ensures continuous lubrication during operation. The grease groove functions as a reservoir that distributes lubricant evenly across the bearing surface, minimizing friction and wear. This not only extends the life of the bearing but also reduces maintenance downtime.

Benefits of Self-Lubrication

The self-lubricating system offers multiple advantages:

  • Reduced Maintenance Costs: Frequent manual lubrication becomes unnecessary, reducing the labor and costs associated with maintenance.
  • Increased Reliability: Consistent lubrication decreases the risk of bearing failure due to inadequate lubrication, especially in hard-to-reach areas.
  • Enhanced Performance: With reduced friction, the machinery operates more smoothly, contributing to better overall performance and efficiency.

Applications and Industries

The self-lubricating bearing guide plate is versatile and finds utility in numerous industries, including automotive, aerospace, and industrial machinery. It is particularly beneficial in environments where regular maintenance is challenging or where high performance under extreme conditions is required.

Future Outlook

As industries continue to demand higher durability and lower maintenance costs, the role of innovative components like the self-lubricating bearing guide plate becomes increasingly significant. The ongoing advancements in material science and mechanical design are likely to further enhance the capabilities and applications of such components.

In conclusion, the self-lubricating bearing guide plate with grease groove for shaft bearing bushing made of 42CrMo4 represents a significant step forward in bearing technology. Its ability to provide consistent lubrication and reduce maintenance demands makes it an invaluable component in the design of high-performance machinery. As we look forward, the integration of such technologies will continue to drive efficiency and reliability across various mechanical applications.

Here’s a simplified and restructured summary of the alloy specifications from EN 10083 for C45 and 42CrMo4, as well as the specifications for 100Cr6 steel:

Alloy Specifications

1. C45 (EN 10083)

  • Classification: Cost-effective, half-hard steel
  • Applications: Well-suited for thin bushes
  • Mechanical Properties: Good mechanical properties with a tensile strength greater than 700 MPa, but weak hardenability
  • Chemical Composition Limits:
    • Chromium + Molybdenum + Nickel = max 0.63%
    • Carbon (C): 0.42 – 0.50%
    • Manganese (Mn): 0.50 – 0.80%
    • Silicon (Si): ≤ 0.40%
    • Sulfur (S): ≤ 0.045%
    • Phosphorus (P): ≤ 0.045%
    • Molybdenum (Mo): ≤ 0.10%

2. 42CrMo4 (EN 10083)

  • Classification: Hard steel, widely used
  • Applications: Adapted for thick bushes
  • Mechanical Properties: Excellent mechanical properties with a tensile strength greater than 700 MPa and good hardenability
  • Chemical Composition Limits:
    • Carbon (C): 0.38 – 0.45%
    • Manganese (Mn): 0.60 – 0.90%
    • Silicon (Si): ≤ 0.40%
    • Sulfur (S): ≤ 0.025%
    • Phosphorus (P): ≤ 0.035%
    • Chromium (Cr): 0.90 – 1.20%
    • Molybdenum (Mo): 0.15 – 0.30%

3. 100Cr6

  • Classification: Very hard steel, mainly used in bearings
  • Mechanical Properties: Exceptional mechanical properties with a tensile strength greater than 900 MPa
  • Hardness: Varies between 55 and 60 HRc (Rockwell hardness)

Overview

  • C45 is a versatile steel suitable for components like thin bushes where cost-effectiveness and mechanical performance are required, though it has limited hardenability.
  • 42CrMo4 is ideal for components such as thick bushes where higher strength and good hardenability are essential.
  • 100Cr6 is used primarily in applications that demand very high hardness and strength, such as in bearing manufacturing.

These materials are chosen based on their mechanical strength, cost-effectiveness, and specific properties like hardenability and hardness that fit particular industrial applications.

Here’s a detailed chart to guide the selection of materials for bearings based on contact pressure, material types, and required treatments:

Bearing Material Selection Guidelines

Contact Pressure (N/mm²) Bearing Type Material Options Hardness Surface Roughness Additional Treatments
Up to 24.5 Metallic Bearings Carbon steel, alloy steel (C45, 42CrMo4) HB150 or over Less than R 1.6 Surface hardening (induction hardening, carburizing)
In corrosive environment: Corrosion-resistant steel (X20Cr13, X22CrNi17)
In sea-water: [Super]Duplex grades, Inconel 625
24.5 – 49.0 Metallic Bearings As above HB250 or over Less than R 0.8 Surface hardening, nitriding, hard chrome plating
49.0 – 98.0 Metallic Bearings As above HRC50 or over Less than R 0.8 Surface hardening, nitriding, hard chrome plating
Up to 49.0 Plastic and Multilayer Bearings Carbon steel for machine structure, alloy steel (S45C, SNC415, SCM435) HB120 or over Less than R 1.6 Induction hardening, carburizing, hard chrome plating
In corrosive and sea-water environment: Corrosion-resistant steel (X2CrNiMo17-12-2 [AISI 316]; X5CrNi18-10 [AISI 304])
49.0 – 98.0 Plastic and Multilayer Bearings As above HRC45 or over Less than R 0.8 Induction hardening, quenching by carburizing, hard chrome plating

Notes:

  • Hardness: Specified in Brinell Hardness (HB) and Rockwell Hardness (HRC), which should be considered depending on the bearing application’s stress levels.
  • Surface Roughness: Specifies the maximum roughness allowable for effective operation, where lower roughness values generally indicate smoother surfaces that reduce friction and wear.
  • Additional Treatments: These are critical for enhancing the durability and performance of bearings under specific environmental conditions or load requirements.

This chart provides a structured approach to selecting appropriate bearing materials and treatments based on operational demands and environmental conditions.

Mitigating Foreign Particle Contamination in Self-Lubricating Sliding Bearings

In the world of mechanical engineering, bearings play a pivotal role in reducing friction between moving parts. While rolling element bearings are highly sensitive to contamination by foreign particles, self-lubricating sliding bearings exhibit a robust resistance to such pollutants. However, it is crucial to acknowledge that even these bearings can experience diminished performance and a shortened lifespan when exposed to contaminants. To address these challenges, certain design strategies and maintenance procedures can be significantly beneficial.

Enhanced Wall Thickness for Improved Durability

The design of self-lubricating sliding bearings often involves a careful consideration of wall thickness. A balance must be struck between achieving compactness and maintaining the integrity and durability of the bearing. The guidelines for wall thickness vary depending on the type of bearing, but generally, a slight reduction is permissible to facilitate more streamlined designs without compromising on performance.

Implementing Dust Seals and Greasing

One effective way to shield bearings from the invasion of foreign particles is the implementation of dust seals. Positioned at both ends of the bearing, these seals prevent the ingress of contaminants. Additionally, filling the bearing area with grease not only provides continuous lubrication but also forms a barrier against dust and debris.

Periodic greasing of the bearings is another crucial maintenance step. This not only replenishes the lubricant but also helps to flush out any accumulated foreign particles, thereby preventing contamination and ensuring the smooth operation of the bearing.

Surface Hardening of the Shaft

To further enhance the contamination resistance of self-lubricating sliding bearings, surface hardening treatments on the shaft can be very effective. These treatments increase the hardness and durability of the shaft, making it less susceptible to wear and abrasion by foreign particles, which might otherwise compromise the bearing’s performance.

Optimizing Bearing Design for Specific Applications

The design of the bearing itself can also influence its susceptibility to contamination. For general applications, a bearing length-to-inner diameter (L/D) ratio of 0.5 to 2.0 is recommended. However, in scenarios involving high loads, uneven contact, or high rotational speeds, a more conservative ratio of 0.8 to 1.0 is advised.

A larger L/D ratio improves oil film formation and enhances vibration damping, which is critical for long-term stability and noise reduction. On the other hand, a smaller ratio can increase the safety margin for eccentric loads, save space, facilitate the discharge of particles, and improve heat dissipation.

Conclusion

While self-lubricating sliding bearings are less prone to issues related to foreign particle contamination than their rolling element counterparts, they still require thoughtful design and regular maintenance to operate at peak efficiency. By adhering to the recommended guidelines for wall thickness, implementing robust sealing and greasing strategies, and opting for surface hardening treatments, the longevity and reliability of these bearings can be significantly improved. In doing so, engineers and maintenance professionals can ensure that their machinery continues to run smoothly and efficiently, even in environments where particle contamination is a concern.

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