Sany STC1250 Load Chart PDF + Specifications

The SANY STC1250 is a 125-tonne truck crane developed for heavy construction, infrastructure and industrial lifting work. The model was introduced by SANY in December 2016 and combines a long telescopic boom with a five-axle road carrier designed for both high lifting capacity and practical jobsite mobility.

A notable part of the STC1250 design is its use of electronic and hydraulic control technologies intended to improve operating smoothness and efficiency. The crane incorporates functions such as fuzzy PID control, automatic boom telescoping, power matching and energy-saving control, helping provide more stable and comfortable crane operation.

Lifting Capacity and Boom

The STC1250 has a maximum rated lifting capacity of 125 tonnes. Its telescopic main boom reaches a maximum length of 60 m, while the basic boom length is approximately 13.3 m.

Maximum lifting moment is 5,100 kN·m on the basic boom and approximately 2,100 kN·m with the fully extended main boom. These figures place the STC1250 firmly in the heavy truck-crane class, with strong short-radius performance as well as useful capacity at longer boom lengths.

Maximum lifting height is approximately 13.3 m with the basic boom and 60 m with the fully extended main boom.

Jib and Maximum Lifting Height

When equipped with its auxiliary jib, the crane can achieve a maximum boom-and-jib length of approximately 78.1 m.

Maximum lifting height with the fully extended boom and jib is also approximately 78.1 m, providing additional reach for taller industrial structures, building construction and installation work where the 60 m main boom alone is insufficient.

Five-Axle Carrier

The STC1250 is mounted on a five-axle carrier. The first, second and fifth axles are steerable, while the third, fourth and fifth axles are driven.

This arrangement provides a combination of road mobility, traction and manoeuvrability. Differential locks are fitted both between the wheels and between axles, improving traction when travelling over difficult surfaces.

The minimum turning radius is approximately 11 m, which is relatively compact for a crane in this capacity class.

Carrier Frame

The chassis uses SANY’s distinctive flat-bottom frame structure, developed to increase bending and torsional strength.

This reinforced frame design is intended to improve fatigue life under repeated crane loading and travel stresses, while also providing a rigid support structure for the crane upperstructure, outriggers and counterweight system.

Carrier Engine and Road Performance

The carrier engine develops a rated output of 358 kW at 1,800 rpm, with maximum torque of approximately 2,300 Nm at 1,200 rpm.

Maximum road speed is approximately 85 km/h, while maximum gradeability is stated at 45%. Published fuel consumption is approximately 70 litres per 100 km.

The combination of relatively high road speed and a five-axle carrier allows the STC1250 to relocate between projects without the transport complexity associated with large crawler cranes.

Overall Dimensions

The crane has an overall transport length of approximately 15.485 m, a width of 3.0 m and a height of 4.0 m.

These dimensions reflect the size of a heavy five-axle truck crane while still allowing the machine to remain road-mobile under suitable operating and regulatory conditions.

Hoisting System

The main winch uses a large-displacement electro-proportional variable pump and variable motor system. The arrangement is designed to provide high single-line pulling force while also improving efficiency through variable pump and motor control.

Maximum main winch single-line hoisting speed is approximately 135 m/min under no-load conditions at the fourth rope layer.

Boom Telescoping and Luffing

The full boom extension time is approximately 480 seconds, while full boom retraction takes around 460 seconds.

Boom raising takes approximately 60 seconds, while lowering requires around 110 seconds. These operating speeds are intended to balance productivity with the controlled movement required for heavy lifting.

Slewing System

The STC1250 uses an electro-proportional pump-controlled dual slewing system.

This arrangement provides good speed regulation and smoother movement while improving energy efficiency. A dedicated slewing-buffer design helps reduce abrupt braking and allows more stable load positioning.

Maximum slewing speed is approximately 1.6 rpm.

Outrigger Operation

The hydraulic outriggers are designed for rapid deployment and retraction.

Horizontal outrigger extension takes approximately 25 seconds, while retraction takes around 20 seconds. Vertical outrigger extension takes approximately 45 seconds, with retraction in about 35 seconds.

These relatively quick setup times help reduce preparation time between lifting operations.

Operator Cab and Controls

The crane cab is constructed from corrosion-resistant steel and uses a fully trimmed interior designed for operator comfort.

Features include a panoramic skylight, adjustable seat and ergonomic control layout, intended to improve visibility during high lifting work and reduce operator fatigue during long shifts.

The electronic control system integrates boom control, power management and energy-saving functions, contributing to smoother and more precise crane operation.

Overall Assessment

The SANY STC1250 is a 125-tonne, five-axle truck crane combining a 60 m telescopic boom, 78.1 m maximum boom-and-jib length, 5,100 kN·m maximum basic-boom lifting moment and 85 km/h road speed. Its five-axle steering and drive arrangement, strong chassis frame, high-speed winch and electro-hydraulic control systems make it suitable for general heavy lifting, industrial construction and infrastructure projects requiring both lifting performance and road mobility.