INDUSTRY COMPONENT

Dipper (Stick)

Hydraulic excavator dipper (stick) is the articulated arm component that connects the boom to the bucket for precise digging and material handling.

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Component Specifications

Definition
The dipper, commonly referred to as the stick or arm in hydraulic excavators, is a critical structural component that articulates between the boom and the bucket attachment. It functions as the intermediate linkage in the excavator's kinematic chain, transmitting hydraulic force from the stick cylinder to control bucket positioning, digging depth, and reach. This component enables precise material excavation, loading, and placement through controlled extension and retraction movements.
Working Principle
The dipper operates on hydraulic cylinder actuation principles. Hydraulic fluid under pressure extends or retracts the stick cylinder, causing the dipper to pivot around its connection point to the boom. This mechanical advantage allows the bucket to follow precise digging trajectories while maintaining optimal force transmission. The component's geometry and pivot points are engineered to maximize digging force, reach, and control throughout the working range.
Materials
High-strength alloy steel (typically ASTM A572 Grade 50 or equivalent), heat-treated for wear resistance and fatigue strength. Critical areas may include reinforced sections with additional plating or hard-facing materials.
Technical Parameters
  • Length 2.5-8 meters (varies by excavator size)
  • Weight 500-5000 kg
  • Working Load 10-150 kN
  • Pivot Bearings Tapered roller or spherical bearings
  • Surface Treatment Shot peened and painted with corrosion-resistant coating
  • Hydraulic Pressure 25-35 MPa
Standards
ISO 6165, ISO 6746, DIN 70020

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Dipper (Stick).

excavator dipper hydraulic stick digging arm earthmoving component construction machinery parts dipper specifications excavator arm replacement Dipper (Stick) Dipper (Stick) in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Hydraulic Excavator

A heavy construction machine that uses hydraulic power to excavate and move earth, rocks, and other materials.

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Engineering Analysis

Risks & Mitigation
  • Structural fatigue cracking
  • Bearing wear leading to misalignment
  • Hydraulic cylinder seal failure
  • Corrosion in pivot areas
  • Overload deformation
FMEA Triads
Trigger: Cyclic loading exceeding material fatigue limits
Failure: Crack propagation in high-stress areas
Mitigation: Implement regular non-destructive testing (NDT), maintain proper lubrication, avoid shock loading
Trigger: Contaminated hydraulic fluid
Failure: Stick cylinder seal degradation and pressure loss
Mitigation: Maintain hydraulic filtration systems, monitor fluid quality, follow scheduled maintenance intervals

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±2 mm on critical bore dimensions, ±1° on angular alignment
Test Method
Ultrasonic testing for material integrity, coordinate measuring machine (CMM) for dimensional verification, load testing to 150% of rated capacity

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between dipper and stick in excavator terminology?

In industrial terminology, 'dipper' and 'stick' are often used interchangeably to refer to the same component - the articulated arm between boom and bucket. Regional preferences may vary, with 'stick' being more common in North America and 'dipper' in other markets.

How often should excavator dippers be inspected for wear?

Dipper components should undergo visual inspection every 250 operating hours, with detailed structural inspection including crack testing every 1000 hours or according to manufacturer recommendations. High-stress areas around pivot points and cylinder mounts require particular attention.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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