SG21A-3 Motor Grader

Heavy Duty Hydraulic Road Grader For Professional Construction Applications

The SG21A-3 Motor Grader is a powerful and reliable earthmoving machine designed for demanding grading, leveling, and road construction tasks. With excellent working stability, strong hydraulic performance, and precision blade control, this heavy-duty grader provides efficient solutions for highways, mining areas, industrial sites, and large-scale infrastructure projects.

Motor graders play an important role in modern construction by creating smooth surfaces, maintaining roads, shaping slopes, and preparing land. The SG21A-3 combines advanced hydraulic technology, durable components, and powerful working capability to meet the needs of professional users.

Designed for high-efficiency operation, the SG21A-3 Motor Grader is suitable for contractors, municipalities, mining companies, and agricultural businesses that require dependable grading equipment.

Product name	SG21A-3
Performance parameters
Operating weight of machine (kg)	16900
Wheelbase (mm)	6560
Wheel tread (mm)	2155
Minimum ground clearance (mm)	430
Steering angle of front wheels (°)	±45
Articulated steering angle (°)	±25
Maximum traction force (kN)	95
Turning radius (mm)	8200 (Outer side of front wheel)
Maximum gradeability (°)	20
Width of shovel blade (mm)	3660/3965/4270
Height of shovel blade (mm)	635
Blade slewing angle (º)	360
Blade cutting angle (º)	44-91
Maximum digging depth of blade (mm)	500
Length (mm)	9430
Width (mm)	2600
Heigh (mm)	3400
Engine
Engine model	6CTAA8.3-C215
Emission	China-II
Type	Mechanical direct injection
Rated power/rated speed (kw/rpm)	160kW/2200rpm
Drive system
Torque converter	Single-stage single-phase three-element
Transmission	Countershaft power shift
Gears	Six forward and three reverse
Brake system
Service brake type	Hydraulic brake
Parking brake type	Mechanical brake
Brake oil pressure (MPa)	10
Hydraulic system
Working pump	Constant displacement gear pump, with flow at 28ml/r
Operating valve	Integral multi-way valve
Pressure setting of safety valve (MPa)	16
Pressure setting of safety valve (MPa)	12.5
Filling of fuel/oils/fluids
Fuel tank (L)	340
Working hydraulic fuel tank (L)	110
Transmission (L)	28
Drive axle (L)	25
Balance box (L)	2X23

Powerful Grading Capability

The SG21A-3 Motor Grader delivers excellent performance for various earthmoving applications.

Main Applications
Highway construction
Road maintenance
Land leveling
Mining road grading
Soil preparation
Slope finishing
Ditch shaping
Industrial site development

The machine provides accurate material movement and smooth surface finishing for professional results.

Advanced Hydraulic Blade Control

The hydraulic system provides precise and efficient blade operation.

Hydraulic Advantages
Accurate blade adjustment
Smooth lifting and positioning
Strong cutting performance
Efficient working cycles
Reduced operator effort
Improved grading accuracy

The adjustable blade system allows operators to handle different soil conditions and construction requirements.

Durable Heavy Duty Structure

The SG21A-3 Motor Grader is built for long-term operation in challenging environments.

Construction Features
Reinforced frame design
Heavy-duty working components
Strong moldboard structure
Reliable hydraulic parts
Durable transmission system
Long service life

The robust design ensures stable performance in construction sites, mines, and outdoor working conditions.

Road Construction And Maintenance Solution

The SG21A-3 is an ideal machine for professional road projects.

Road Applications
Highway building
Gravel road maintenance
Road widening
Surface leveling
Shoulder shaping
Road repair projects

Its precise grading ability helps improve road quality and construction efficiency.

Mining And Large Scale Earthmoving Applications

The SG21A-3 Motor Grader is designed for heavy-duty working environments.

Mining Uses
Mine access road construction
Road maintenance
Site leveling
Material spreading
Industrial area preparation

Its strong power and stable operation make it suitable for demanding applications.

Excellent Stability And Mobility

The SG21A-3 provides reliable performance on various terrains.

Mobility Benefits
Strong traction
Stable operation
Flexible steering
Good ground adaptability
Efficient job site movement

The machine can handle uneven surfaces while maintaining grading accuracy.

Operator Friendly Design

The SG21A-3 Motor Grader is designed for comfortable and efficient operation.

Operator Advantages
Clear visibility
Comfortable cabin
Ergonomic controls
Easy operation
Reduced vibration
Improved productivity

A user-friendly design helps operators complete projects more efficiently.

Cost Effective Construction Equipment

The SG21A-3 provides excellent long-term value.

Economic Benefits
High working efficiency
Reduced maintenance costs
Long equipment lifespan
Multi-purpose operation
Strong return on investment

It is a reliable choice for companies needing professional grading performance.

Why Choose Us
Professional Equipment Manufacturer

We specialize in manufacturing reliable construction machinery and heavy equipment solutions.

Strict Quality Control

Each SG21A-3 Motor Grader is inspected to ensure durability, safety, and performance.

Factory Direct Supply

We provide competitive pricing with stable manufacturing quality.

Customized Solutions

Different configurations and customer requirements can be supported.

Advanced Production Technology

Modern manufacturing processes ensure reliable machine performance.

Global Export Experience

Our machinery is supplied to customers in different markets worldwide.

Complete Technical Support

Professional operation guidance and after-sales service are available.

FAQs
Q1: What is the SG21A-3 Motor Grader?

A: The SG21A-3 Motor Grader is a heavy-duty machine designed for road construction, grading, leveling, and earthmoving applications.

Q2: What can the SG21A-3 be used for?

A: It can be used for highways, mining roads, land leveling, slope shaping, and road maintenance.

Q3: Is the SG21A-3 suitable for large construction projects?

A: Yes. It is designed for professional and large-scale infrastructure applications.

Q4: Does it have hydraulic blade control?

A: Yes. The hydraulic system provides accurate and efficient blade adjustment.

Q5: Can it work in mining environments?

A: Yes. The SG21A-3 is suitable for mining roads and industrial site preparation.

Q6: What are the advantages of a motor grader?

A: Motor graders provide precise leveling, road shaping, and efficient surface finishing.

Q7: Is the SG21A-3 durable?

A: Yes. It uses heavy-duty components designed for long-term operation.

Q8: Who uses SG21A-3 Motor Graders?

A: Construction companies, mining operators, municipalities, and infrastructure contractors.

Q9: Can it operate on uneven terrain?

A: Yes. It provides strong stability and traction for outdoor applications.

Q10: Why choose SG21A-3 Motor Grader?

A: It offers powerful performance, reliable quality, precise grading capability, and high productivity.

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