Mining Excavator Work Equipment (Boom, Arm, Bucket)

Product Specifications

Technical details and manufacturing context for Work Equipment (Boom, Arm, Bucket)

Definition

The work equipment is the core functional assembly of a mining excavator responsible for excavation, loading, and material handling operations. It comprises three main structural components: the boom, which is the primary load-bearing arm connecting the upper frame to the arm; the arm (or stick), which is the extension linking the boom to the bucket; and the bucket, the end tool that performs digging and loading. This assembly transfers hydraulic power from the machine's mainframe into precise digging force and movement. Constructed from high-strength alloy steel and abrasion-resistant steel plate, the work equipment is designed to withstand severe impact and abrasive wear in mining environments. Key parameters include rated load capacity (5–30 t), boom length (5–12 m), arm length (2–6 m), bucket capacity (0.5–5 m³), operating pressure (25–35 MPa), breakout force (100–300 kN), arm crowd force (80–250 kN), material grade (Q345–Q690), hardness (45–55 HRC), operating temperature (-40–85 °C), weight (2–15 t), and pin diameter (50–150 mm). These values are reference ranges and must be verified for the specific model and application. Standards such as ISO 10533, ISO 7451, ISO 6015, GB/T 1591, ISO 6508, and ISO 2340 are referenced for testing and verification. The work equipment is a critical component that directly influences excavator performance, stability, and durability. Proper selection and maintenance are essential to ensure safe and efficient operation. Always consult the legal manufacturer or supplier to confirm model-specific specifications and compliance with applicable standards.

Working Principle

Hydraulic cylinders mounted on the excavator's upper structure actuate the boom, arm, and bucket through pivot points. The boom cylinder controls vertical reach and digging depth, the arm cylinder controls horizontal extension and retraction, and the bucket cylinder controls curling/uncurling for digging and dumping. Coordinated operation of these cylinders enables complex digging cycles. The hydraulic system operates at pressures between 25 and 35 MPa, delivering breakout forces up to 300 kN. The mechanical linkage and pivot geometry convert hydraulic force into effective digging motion, while the bucket's shape and cutting edge penetrate the material. The operator uses joystick inputs to modulate cylinder flow, achieving precise control over the digging trajectory. Wear on pins and bushings can affect performance, so regular inspection and lubrication are necessary.

Common Materials

High-strength alloy steel, Abrasion-resistant steel plate

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	5–30 t	Maximum safe working load at specified reachISO 10533
Boom Length	5–12 m	Determines digging reach and lifting height
Arm Length	2–6 m	Affects digging depth and breakout force
Bucket Capacity	0.5–5 m³	Nominal heaped capacity per SAE/ISOISO 7451
Operating Pressure	25–35 MPa	Below 25 MPa insufficient breakout force
Breakout Force	100–300 kN	Maximum force at bucket edgeISO 6015
Arm Crowd Force	80–250 kN	Force exerted by arm cylinderISO 6015
Material Grade	Q345–Q690	High-strength steel for structural partsGB/T 1591
Hardness	45–55 HRC	For wear-resistant bucket platesISO 6508
Operating Temperature	-40–85 °C	Seals and steel maintain performance
Weight	2–15 t	Total assembly weight affects stability
Pin Diameter	50–150 mm	Critical for joint strength and wearISO 2340

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Boom
Primary structural member connecting upper structure to arm, provides vertical reach and digging depth

Material: High-strength welded steel box sections
Arm (Stick) Part
Intermediate member connecting boom to bucket, controls horizontal extension and digging force

Material: High-strength steel with reinforced wear plates
Bucket
End effector for digging, loading, and material handling, with cutting edge and teeth for penetration

Material: Abrasion-resistant steel with replaceable wear parts
Linkage Pins and Bushings Part
Provide pivot points between components, withstand high loads and abrasion

Material: Hardened alloy steel with bronze bushings
Hydraulic Cylinders
Boom, arm and bucket cylinders that drive the whole digging cycle.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Work Equipment (Boom, Arm, Bucket).

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Mining Excavator

View system integration details

Manufacturers of Work Equipment (Boom, Arm, Bucket)

Manufacturer profiles associated with Work Equipment (Boom, Arm, Bucket).

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

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Frequently Asked Questions

What are the main components of the work equipment?

The work equipment consists of three main components: the boom, the arm (or stick), and the bucket. The boom is the primary load-bearing arm, the arm connects the boom to the bucket, and the bucket is the digging tool.

What materials are used in the construction?

The work equipment is typically made from high-strength alloy steel and abrasion-resistant steel plate. Material grades range from Q345 to Q690, and bucket plates have a hardness of 45–55 HRC.

What standards apply to the work equipment?

Relevant standards include ISO 10533 for rated load capacity, ISO 7451 for bucket capacity, ISO 6015 for breakout and crowd forces, GB/T 1591 for material grade, ISO 6508 for hardness, and ISO 2340 for pin diameter. These standards serve as references for verification.

How should I verify the specifications for a specific model?

The values provided are reference ranges. Always consult the legal manufacturer or supplier to confirm the exact specifications for your specific model and application, and ensure compliance with applicable standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Max hydraulic pressure: 350 bar
other spec:	Max flow rate: 450 L/min, Max slurry concentration: 60% solids by weight
temperature:	-40°C to +50°C

Work Equipment (Boom, Arm, Bucket)

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards