Note: Specifications and designs are subject to change without notice.

36-Ton Heavy-Duty Crawler Excavator for Quarry, Earthmoving & Infrastructure

The NEW SKY NK638 is a 36.5-ton heavy-duty crawler excavator developed for demanding earthmoving, quarry, infrastructure and large-scale construction applications.

With a 1.6–1.8 m³ bucket capacity, 35° gradeability and a maximum digging depth of 7,370 mm, the NK638 is designed to provide the stability, working range and digging capability required for demanding jobsites.

BUILT FOR HEAVY-DUTY APPLICATIONS

The NK638 is designed for contractors working in environments where machine stability, structural durability and consistent hydraulic performance are essential.

Its 36.5-ton operating weight provides a stable platform for excavation and material handling, while the reinforced structural design supports demanding working conditions.

KEY ADVANTAGES

36.5-Ton Operating Class--

The machine provides a stable operating platform for heavy earthmoving, quarrying and infrastructure construction.

Isuzu 6HK1X Engine--

The NK638 is equipped with an Isuzu 6HK1X engine rated at 190.5 kW / 2000 rpm, providing dependable power for continuous heavy-duty operations.

High-Capacity Bucket--

The 1.6–1.8 m³ bucket range provides a practical configuration for large-volume excavation and material handling.

Responsive Hydraulic System--

The negative-flow-control hydraulic system is designed to regulate hydraulic flow according to operating demand, supporting smooth combined movements and responsive operation.

Durable Structural Components--

High-strength steel components are used in the major structural areas of the machine to support demanding excavation and material-handling applications.

Long Working Range

With a maximum digging depth of 7,370 mm and maximum digging reach of 11,100 mm, the NK638 is suitable for deep excavation, large foundations, quarry operations and high-volume earthmoving.

ATTACHMENT OPTIONS

Depending on working requirements, the NK638 can be configured for different applications with attachments such as:

Hydraulic breaker

Reinforced bucket

Rock bucket

Grapple

ESIGNED FOR DEMANDING JOBSITES

The NK638 is built around a simple principle: strong structure + dependable power + responsive hydraulics + practical working range.

For contractors and fleet owners, this combination provides a versatile platform for high-volume excavation and heavy-duty material handling.

DISCUSS YOUR NK638 CONFIGURATION

Looking for a 36-ton heavy-duty excavator for quarrying, infrastructure or large-scale earthmoving?

Tell us your material, working conditions and application. NEW SKY can provide the appropriate bucket, attachment and machine configuration for your project.