Introduction to 700T Series slew drives

The 700T Series slew drives represent the most technologically advanced solution for all applications requiring the rotary movement of heavy structures. Used for decades on cranes, excavators, and special machinery, these gearboxes are recognized by leading global manufacturers as a benchmark for reliability and precision. Choosing the 700T Series means opting for a product of consolidated success over time.

The ability to manage high torques in confined spaces makes this slew drive ideal for machines operating in severe conditions. Whether it is a mini-excavator or a large truck crane, the 700T Series guarantees a fluidity of movement that increases the productivity and operational safety of the vehicle.

Technical and construction features of value

The true value of the 700T Series lies in its mechanical design of excellence. With as many as 13 available sizes, the range covers output torques up to 70,000 Nm, allowing the perfect size for the specific application to be found at all times.

Among the main construction details are:

• Reinforced pinion support: The pinion shaft is supported by bearings with high load capacity, designed to withstand the high stresses resulting from engagement with the slewing ring.

• Robust output housing: Made of spheroidal cast iron, available with high or low mounting flange to adapt to any chassis.

• Oversized gears: Planetary reductions use shaved, case-hardened, and tempered gears for extreme durability under load.

• Integrated parking brakes: Negative-action multi-disc systems in oil bath, with double-action options (positive and negative) for mobile cranes requiring dynamic braking.

Effectiveness in special applications

The use of a 700T Series slew drive is particularly effective not only in earthmoving but also in sectors such as wind energy, aerial platforms, and concrete pumps. The modularity of the system allows for the coupling of various types of hydraulic or electric motors, offering unparalleled flexibility of use.

A distinctive aspect is the lubrication: while the gearbox operates in an oil bath for maximum heat dissipation, the lower bearing on the pinion side is often permanently grease-lubricated. This separation protects the heart of the transmission and simplifies routine maintenance operations, making the entire system more long-lasting and safe.

Components of the slew drive unit

Each 700T Series unit is a complete system that can integrate:

1. Orbital or piston motor: Often semi-integrated to reduce overall dimensions.

2. Control valves: Flanged directly onto the motor (anti-shock, anti-cavitation, balancing).

3. Customized pinions: Integral or attached, made from forged steel and machined with extreme precision.

This integration ensures that the slew drive responds immediately to the operator’s commands, avoiding jerks or oscillations of the turret that could compromise the stability of the lifted load.

3D Models and FP Trasmissioni technical support

To facilitate the work of designers and maintenance technicians, we provide 3D model visualization for every slew drive in the range. Consulting the three-dimensional drawing allows for the verification of critical dimensions and the position of the mounting holes, ensuring that integration onto the machine occurs smoothly.

FP Trasmissioni does not merely supply the component, but full technical support for the configuration of the braking system and the choice of the most suitable reduction ratio. Our experience is the guarantee of a technical choice of value that will endure over time.