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Hardened 4120 Steel Bucket Bushing/Grooved

 Hardened Alloy Steel Bucket Bushings: Engineered for Heavy-Duty Excavation & Impact Backhoe bucket bushings with oil ring, oil grooves and oil pockets,

hardened alloy steel ASTM4120, DIN 25CrMo4, GB#20CrMo

Maximize the operational uptime and structural integrity of your earthmoving machinery with our precision-hardened Alloy Steel Bucket Bushings. In high-stress construction and drilling environments, standard bushings often succumb to cracking or surface deformation under extreme heavy loads. Our specialized ASTM 4120 / DIN 25CrMo4 steel bushings solve this by combining a high-hardness wear surface with a ductile core that effectively absorbs punishing shocks without failure.Backhoe bucket bushings with oil ring, oil grooves and oil pockets, hardened alloy steel ASTM4120, DIN 25CrMo4, GB#20CrMo

Why Choose Our Hardened Steel Bushings?

The primary purpose of utilizing advanced alloy steels like 20CrMo is to achieve a superior balance of Core Toughness and Surface Endurance. Through meticulous quenching and tempering processes, our bushings offer:

  • Exceptional Wear Resistance: The hardened interior surface features spiral oil grooves and elliptical sockets designed for maximum grease retention and reduced friction.
  • Superior Crack Resistance: The alloy's specialized chemistry, containing Manganese and Vanadium, ensures the core remains ductile enough to withstand heavy vibrations and impact without fracturing.
  • Precision Surface Finish: Quenched and tempered to optimize surface roughness, ensuring a seamless interface with pins even in the most abrasive soil conditions.

Element

Content (%)

Functional Benefit

Chromium (Cr)

0.80 to 1.10

Enhances hardening rate and provides fundamental wear resistance.

Molybdenum (Mo)

0.15 to 0.25

Improves high-temperature strength and ensures deep hardening consistency.

Manganese (Mn)

0.40 to 0.70

Increases overall strength and toughness of the alloy matrix.

Carbon (C)

0.17 to 0.24

Provides the necessary hardness after heat treatment while maintaining weldability.

Typical Applications

Our hardened steel bushings are the standard for high-wear components in heavy engineering:

  • Earthmoving & Construction: Backhoe bucket pins, excavator loaders, and linkage joints.
  • Agricultural Machinery: Power harrows, ploughs, and rear-mounted excavation attachments.
  • Hydraulics & Drilling: Hydraulic cylinder bottom/eyelet protection and heavy-duty drilling rig components.
  • Industrial Equipment: Sliding guides for industrial presses and suction pump components.

·       Expert Guidance & Technical Support

·       If you require specific metric sizing, custom oil groove patterns (spiral, circular, or elliptical), or product data sheets for your ASTM 4120 bushings, we are here to help. Please submit your inquiry via our website contact form or email us directly at [email protected] for a detailed technical consultation.

Region/Standard

Grade Designation

Best For

USA (ASTM A29)

4120

Heavy-duty North American equipment standards.

Germany (DIN EN)

25CrMo4 (1.7218)

High-precision European engineering applications.

China (GB/T 3077)

20CrMo

Versatile industrial and mining equipment.

Japan (JIS G4053)

SCM420

High-cycle robotic and automotive machinery.

Expert Guidance & Technical Support

If you require specific metric sizing, custom oil groove patterns (spiral, circular, or elliptical), or product data sheets for your ASTM 4120 bushings, we are here to help. Please submit your inquiry via our website contact form or email us directly at [email protected] for a detailed technical consultation.