Editorial Technical Reference

Motor Grader

This page explains how Motor Grader is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A heavy-duty construction machine with a long blade used to create flat surfaces.

Product Specifications

Technical details and manufacturing context for Motor Grader

Definition
A motor grader, also known as a road grader or simply grader, is a construction machine with a long blade used to create a flat surface during grading. Typically, the blade is positioned between the front and rear axles and can be angled, tilted, and raised or lowered to precisely shape and level soil, gravel, or other materials. It is essential for road construction, site preparation, and maintaining unpaved surfaces. The machine is powered by an engine that drives the wheels or tracks, while hydraulic systems control the blade's movements. The operator adjusts the blade's angle, tilt, and height via hydraulic controls to cut, spread, and level material as the machine moves forward. The blade's position relative to the machine's frame and the ground determines the grading action, allowing for precise contouring and leveling of surfaces. Motor graders are typically used in construction and maintenance of roads, highways, and other infrastructure projects. They are also used in mining, agriculture, and land development. The machine's versatility and precision make it a valuable asset on any job site. When selecting a motor grader, it is important to consider the specific requirements of the project, such as the type of material to be graded, the desired grade accuracy, and the operating environment. The machine's specifications, including blade length, operating weight, engine power, and other parameters, should be verified with the manufacturer or supplier to ensure they meet the project's needs. Additionally, compliance with relevant standards, such as ISO 9249 for engine power and ISO 4409 for hydraulic system pressure, should be confirmed. Always consult the legal manufacturer or supplier for model-specific values and standards.
Working Principle
The motor grader operates by using its engine to power the wheels or tracks for movement and hydraulic systems to control the blade. The operator adjusts the blade's angle, tilt, and height via hydraulic controls to cut, spread, and level material as the machine moves forward. The blade's position relative to the machine's frame and the ground determines the grading action, allowing for precise contouring and leveling of surfaces. The machine's movement and blade adjustments work together to achieve the desired grade.
Common Materials
High-strength steel, Alloy steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Blade LengthRequired3650–4270 metersThe length of the grading blade
Operating WeightRequired13000–18000 kilogramsThe total weight of the machine during operation
Engine PowerRequired130–190 kilowattsThe power output of the engineISO 9249
Blade Width610–760 mmBlade height
Blade Lift Range300–500 mmMaximum lift above ground
Blade Side Shift±500 mmLateral displacement from center
Blade Angle0–90 °Horizontal rotation range
Max Speed40–50 km/hTransport speed
Grade Accuracy±10 mmTypical tolerance for finished grade
Fuel Tank Capacity250–400 LFor extended operation
Hydraulic System Pressure20–25 MPaWorking pressure for implement hydraulicsISO 4409
Turning Radius7.0–8.5 mMinimum turning radius
Operating Temperature Range-20–50 °CAmbient temperature for normal operation

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
  • Blade Part
    Cuts, spreads, and levels material
    Material: High-strength steel
  • Moldboard Part
    The main part of the blade that contacts the ground
    Material: Wear-resistant alloy steel
  • Circle Part
    Rotates the blade for angle adjustment
    Material: Forged steel
  • Scarifier
    Loosens compacted material before grading
    Material: Hardened steel
  • Engine
    Prime mover for travel and for the hydraulic pumps.
  • Wheels
    Carry and propel the machine while the blade cuts.
  • Hydraulic Controls
    Set blade angle, tilt and height from the cab.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Motor Grader.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (mechanical system)
flow rate: N/A (no fluid flow)
temperature: -20°C to 50°C
blade downforce: Up to 15,000 kg
operational slope: Up to 30% grade
slurry concentration: N/A (solid material handling)
Media Compatibility
✓ soil/earth grading ✓ gravel road maintenance ✓ snow removal
Unsuitable: underwater operations
Sizing Data Required
  • project surface area (m²)
  • required grading depth (mm)
  • operational terrain type

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Hydraulic System Contamination
Cause: Ingress of particulate matter or moisture into hydraulic fluid due to inadequate filtration, seal degradation, or improper maintenance practices, leading to component wear, valve sticking, and reduced system efficiency.
Undercarriage Component Fatigue Failure
Cause: Cyclic loading from grading operations and uneven terrain causing stress concentrations in pins, bushings, and track components, exacerbated by inadequate lubrication, misalignment, or material defects.
Maintenance Indicators
  • Unusual grinding or knocking noises from the engine or hydraulic system during operation
  • Visible hydraulic fluid leaks around cylinders, hoses, or connections, especially with pressure drops
Engineering Tips
  • Implement a proactive hydraulic fluid analysis program with scheduled sampling to monitor contamination levels, water content, and additive depletion, enabling predictive maintenance before catastrophic failure occurs.
  • Establish a rigorous undercarriage inspection and lubrication schedule using manufacturer-specified greases and torque values, focusing on pivot points and wear components to prevent premature fatigue and misalignment.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 50001:2018 - Energy management systems ANSI/SAE J1163 - Performance test code for motor graders DIN EN 474-6:2022 - Earth-moving machinery - Safety - Part 6: Requirements for graders

Quoted from the published standard.

Manufacturing Precision
  • Blade cutting edge straightness: +/-1.5mm over full length
  • Circle gear backlash: 0.1-0.3mm maximum
Quality Inspection
  • Non-destructive testing (NDT) of critical welds using magnetic particle inspection
  • Hydraulic system pressure and leakage testing per manufacturer specifications

Manufacturers of Motor Grader

10 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Asian Construction Equipment Group Co., Ltd.
Wuxi, Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ asianconst.com · checked 2026-09-16
Chongqing Kyson Machinery Equipment Co., Ltd.
Guangxi, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “4215D motor grader”
View source page ↗ kysonpower.com · checked 2026-09-16
Jining Zhineng Construction Machinery Co., Ltd.
Shandong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader Cabin”
View source page ↗ zhinengcab.com · checked 2026-08-30
SANY Group
Taiwan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ sanyglobal.com · checked 2026-08-27
SDLG Co., Ltd.
Shandong, CN
Also makes: Skid Steer Loader, Backhoe Loader, Wheel Loader and 1 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ sdlg.com · checked 2026-09-16
Shanghai VOSTOSUN Industrial Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ vostosun.com · checked 2026-09-07
SINOMACH
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ cnchanglin.com · checked 2026-08-31
SINOWAY INDUSTRIAL (SHANGHAI) CO.,LTD.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Graders”
View source page ↗ sinoway-sh.com · checked 2026-09-15
Tengzhou Topway Machinery Co., Ltd
Fujian, CN
Also makes: Skid Steer Loader, Wheel Loader, Backhoe Loader and 6 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader”
View source page ↗ topwaymachine.com · checked 2026-08-29
Xiamen Yintai Machinery Co., Ltd.
Xiamen, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Motor Grader blades”
View source page ↗ yintparts.com · checked 2026-09-16
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Frequently Asked Questions

What is a motor grader used for?

A motor grader is used to create flat surfaces during grading, such as in road construction, site preparation, and maintaining unpaved surfaces. It levels and shapes soil, gravel, or other materials with a long adjustable blade.

How does a motor grader achieve precise grading?

The operator uses hydraulic controls to adjust the blade's angle, tilt, and height. The blade's position relative to the frame and ground determines the cutting and leveling action, allowing for precise contouring.

What are typical blade lengths for motor graders?

Typical blade lengths range from 3650 to 4270 mm, but exact values depend on the model. Always verify with the manufacturer or supplier for the specific machine.

What standards apply to motor grader specifications?

Engine power may be measured per ISO 9249, and hydraulic system pressure per ISO 4409. These standards are references for verification; compliance must be confirmed with the manufacturer.

Data Basis

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

Preliminary Technical Classification
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