Construction excavator Standard boom & arm

Enstruc standard excavator booms and arms are engineered for general construction applications including digging, trenching, backfilling, and lifting. Built to match or exceed OEM specifications, our boom and arm assemblies offer reliable performance as direct-fit replacements for damaged, worn, or outdated components.

We manufacture replacement excavator booms and dipper arms for construction-class machines from 13 to 50 tonnes, supporting a wide range of models across all leading OEMS. Excavator boom and arm sets are fabricated from high-tensile, wear-resistant steel and welded using robotic processes to ensure strength, alignment, and long service life. Our standard booms and dipper arms are delivered ready to install, complete with hydraulic lines, bucket cylinder, pins, and linkage components.

Key Features

  • Direct replacement for OEM standard boom and arm assemblies
  • Manufactured from high-strength, low alloy steel for strength & durability
  • Line bored and fitted with hardened bushings for extended pin life
  • Supplied with bucket cylinder, pins, hydraulic lines, and linkage kit
  • Compatible with a wide range of excavator models up to 50 tonnes
  • Welded box-section design for strength and torsional resistance
  • Options for additional wear plates & reinforced sections in high stress areas
  • Quality assured fabrication and machining for precise fitment and performance

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Standard Excavator Boom and Arm FAQ

The boom and arm (or dipper) form the primary working linkage of an excavator, enabling it to reach, lift, dig, and position loads. The boom provides vertical lift and reach, while the arm controls the forward digging motion and depth. Together, they allow precise control during tasks such as trenching, material handling, grading, and loading. In construction applications, they are essential for delivering the required breakout force, working range, and productivity across general earthworks and civil projects.
We design and manufacture hydraulic excavator boom and arm assemblies for construction class excavators up to 50 tonne - machine models include Cat 313, 320, 325, 330, 336, 349; Komatsu PC130, PC160, PC210, PC290, PC360, PC490; Hitachi ZX130 to ZX470; Volvo EC140 to EC480; and other models by Develon, JCB, Case, Hyundai, and more. We also supply booms and arms for quarry-class excavators, and mining-class excavators up to 125+ tonne.
Yes, Enstruc can customise replacement excavator booms and arms with auxiliary lines to suit a wide range of excavator attachments like quick couplers, buckets, ripper attachments, hydraulic breakers, grabs, shears, and more.
Yes, our standard kit includes the boom, arm, hydraulic lines, bucket cylinder, pin kit, and linkage parts. Boom and arm cylinders can be supplied upon request.
Yes, before shipping, every boom and arm assembly undergoes rigorous quality control checks and non-destructive testing (NDT) to verify welds, structural integrity, and dimensional accuracy.
Yes, we deliver worldwide with full logistics coordination and technical support to assist with on-site installation and aftersales support.

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Request a quote for your standard excavator arm and boom today.