Name: Excavator (Hydraulic Excavator)
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Excavator (Hydraulic Excavator)

An excavator is a heavy construction machine consisting of a boom, arm, bucket, and cab mounted on a rotating platform (house) above an undercarriage with either tracks or wheels. It is widely used for digging trenches, foundations, and holes, as well as for material handling, demolition, grading, and lifting. With its 360-degree swing capability and powerful hydraulic system, the excavator is one of the most versatile and essential machines on construction sites, mining operations, and forestry projects.

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1. Overview

An excavator, also known as a hydraulic excavator or digging machine, is a hydraulic-powered construction machine equipped with a bucket. It is widely used in construction, mining, forestry, infrastructure, and other industries for digging, loading, grading, and material handling operations.

Modern excavators fall into two main categories:

Type	Characteristics	Best For
Crawler Excavator	Excellent stability, low ground pressure	Construction sites, mining, rough terrain
Wheeled Excavator	High travel speed, road legal, no road damage	Municipal works, road maintenance, urban sites

Excavators are sized by operating weight and bucket capacity, ranging from under 1 ton (mini excavators) to over 100 tons (large mining excavators).

2. Key Features

Efficient hydraulic system – Load-sensing hydraulics deliver oil on demand, reducing fuel consumption
Multiple work modes – Select power mode based on application to balance efficiency and power
Reinforced structures – Boom, arm, and chassis strengthened for extended service life
Comfortable cab – ROPS/FOPS certified, suspension seat, large display screen
Easy maintenance – Centralized service points, removable radiator screen
Emission compliant – Meets Stage V / Tier 4 Final / China IV standards
Intelligent technologies – Grade control, payload system, telematics (varies by brand)

3. Specifications (Representative Models)

Mini Excavator (6-ton class) – SANY SY60C

Parameter	Value
Operating weight	6,000 – 6,200 kg
Engine	Yanmar 4TNV98C / Kubota V2607
Power	42.4 – 45 kW
Bucket capacity	0.21 – 0.23 m³
Max digging depth	3,770 – 3,950 mm
Max digging reach	6,090 – 6,320 mm
Tail swing radius	1,640 mm

*Source: *

Medium Excavator (20-ton class) – Caterpillar 320 Next Gen

Parameter	Value
Operating weight	21,700 – 22,000 kg
Engine	Cat C4.4
Net power	128.5 kW (172 hp)
Bucket capacity	1.19 m³
Max digging depth	6,720 mm
Max digging reach	9,850 mm
Swing speed	11.25 rpm

*Source: *

Wheeled Excavator (21-ton class) – Doosan DX210W-7X

Parameter	Value
Operating weight	21.1 t
Engine	Doosan DN06 (Stage V)
Power	129 kW
Bucket capacity	0.96 – 1.16 m³
Max digging depth	5,505 mm
Max digging reach	9,330 mm
Travel speed	37 km/h
4-wheel steering	Yes

*Source: *

Large Excavator (38-ton class) – Caterpillar 336 Next Gen

Parameter	Value
Operating weight	38,500 – 40,600 kg
Engine	Cat C9.3B
Power	240 – 260 kW
Bucket capacity	1.90 – 2.40 m³
Max digging depth	6,770 mm
Max digging reach	11,100 mm

*Source: *

Large Excavator (48-ton class) – SANY SY500H

Parameter	Value
Operating weight	49,000 kg
Engine	Isuzu 6WG1
Power	300 kW
Bucket capacity	3.2 m³
Max digging depth	7,760 mm
Max digging reach	12,125 mm
Tail swing radius	3,650 mm

*Source: *

4. Excavator Type Comparison

Feature	Crawler Excavator	Wheeled Excavator
Travel method	Steel tracks	Rubber tires
Highway travel	Requires transport trailer	Self-propelled (many models)
Travel speed	3 – 5 km/h	10 – 40 km/h
Stability	Excellent	Good (requires outriggers)
Ground pressure	Low	Higher
Road surface impact	Damages paved surfaces	Minimal damage
Typical weight range	1 – 100+ t	5 – 25 t
Best for	Earthmoving, mining, off-road	Municipal, roadwork, urban sites

*Source: *

5. Leading Brands

Brand	Reputation	Key Strengths
Caterpillar	World leader	Durability, resale value, technology
Komatsu	Japanese quality	Hybrid technology, intelligent control
Hitachi	Reliable	Excellent hydraulics, fuel efficiency
Volvo	Safe & comfortable	Cab comfort, fuel efficiency
SANY	China's #1	Value for money, service network
XCMG	Chinese leader	Broad product line, heavy models
Doosan	Korean brand	Strong in wheeled excavators
Kubota	Mini excavator expert	Leading in micro/mini segment
Yanmar	Mini excavator expert	Own engines, fuel efficient

*Source: *

6. Applications

Industry	Typical Work	Recommended Model
Construction	Foundation digging, pipe laying, site grading	20-30t crawler
Municipal	Road repair, utility work, landscaping	Wheeled excavator
Mining	Overburden removal, loading, rock breaking	50-100t crawler
Agriculture	Drainage ditches, pond cleaning, land leveling	1-6t mini
Forestry	Land clearing, site prep, log loading	20-30t with guarding
Demolition	Building demolition, material sorting	20-40t with hydraulic hammer
Indoor / Confined spaces	Basements, indoor demolition, tunnels	1-5t zero tail swing

7. Buying Guide – Key Selection Factors

Factor	Consideration
Operating weight	Determines transport method, ground bearing requirements
Bucket capacity	Affects productivity; match to material density
Digging depth & height	Must meet job site requirements
Engine emissions	Confirm local regulations (Tier / Stage / China standards)
Crawler or wheel	Consider mobility needs and road surface conditions
Attachment needs	Hydraulic hammer, grapple, quick coupler, etc.
Service support	Parts availability, dealer network in your region
New vs. used	Budget, warranty, technology trade-offs

8. Attachments & Expandability

Attachment	Function
Hydraulic breaker (hammer)	Breaking rock, concrete, pavement
Hydraulic grapple	Handling scrap, timber, waste
Quick coupler	Rapid attachment changes, increased efficiency
Tilt bucket	Slope finishing, fine grading
Hydraulic shear	Rebar cutting in demolition
Auger	Drilling holes for posts, piles, trees

9. Delivery & Service

Item	Details
Lead time (new)	2–6 months (varies by brand and configuration)
Lead time (used)	As available (typically stock machines)
Shipping	Break bulk / Flat rack / RORO / Container
Warranty (new)	Typically 12 months or 2,000 hours
Certification	CE, ISO 9001, EPA, EAC (varies by market)
Service network	Global dealer network for major brands
Technical support	24/7 online guidance

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