Track System Components

Track Pads

Manufactured from certified national special steel;
Each track pad consists of two parts: the track pad and the reinforcement;
Both components have 8 mm thickness;
The reinforcement is fully welded, ensuring greater structural strength;
The edges are designed to be slightly lower than the contact surface, making maneuvering easier;
Main market sizes: 600 mm to 1,200 mm, with centered 5/8" bolt holes;
Custom models can also be manufactured.

Also known as Truck or Chassis;
The design is open, meaning the roller mounting bolts remain visible, which makes maintenance of these components easier;
Manufactured with “U” beams and 3/8" structural steel plates;
Features internal reinforcements and additional support around the central axle tube, preventing any torsion that could compromise structural integrity;
All components are fastened using track bolts and nuts made of 12.9 grade steel, increasing durability and simplifying maintenance.

Sizes:

The central axles are manufactured from special axle-grade steel and are solid.
Each harvester operates with a specific central axle model, such as the tapered type or the universal plate type.
All new assemblies use bars with a 122 mm diameter, machined down to 110 mm in the section that is fitted into the track frame.
We also manufacture central axles in specific models and dimensions as replacement parts.

Tapered Type

Universal Plate Type

These components are responsible for fastening the tracks to the harvester chassis.
Each machine has its own specific adaptation model.
The Chassis Adapter is the adaptation component used in machines that do not have a factory mounting interface, and it is permanently welded to the machine structure.
The Mounting Plate (or the Offset, depending on the machine model) is bolted to the Chassis Adapter.
Our designs are developed with the objective of reinforcing the structure, facilitating installation, and simplifying maintenance.
The projects are also designed to facilitate the conversion between the use of tracks and tires.

Chassis Adapter

Mounting Plate

Offset

Drive Hub

The drive hub is mounted to the harvester’s final drive.
It is the traction element of the track system.
This component is responsible for transferring engine power to the drive wheels.
This part may be a simple drive plate or a drive hub that shifts the drive wheel outward.
The length of the drive hub may vary according to the machine model and the track pad width selected by the customer.

Drive plate

A gear responsible for transferring the torque delivered by the final drive to the rest of the assembly.
The number of teeth varies according to the machine model.
The most commonly used sizes are 23 and 25 teeth.

The standard chain used in harvesters is the D4E.
Smaller machines use grease-sealed chains.
Larger machines use oil self-lubricated chains.
The most commonly used brands are Berco, ITR, and ITM.
The number of links varies according to the track frame size, with 33, 36, and 39 links being the most commonly used.

Simple Roller

Double Roller

The most usual rollers in tracks are based on the D4E dozer.
There are two types: the Double flange, which has four flanges (one at each end and two internal), and the Single flange, which has only two flanges at the ends.
All track frames produced by Tonetto are equipped with mounting holes for installing the upper roller support.
This is an optional component, recommended when using large track pads measuring 1,100 mm and 1,200 mm, in order to prevent premature chain wear.

The idler wheel is responsible for guiding the chain into the track frame.
We offer a new model exclusively developed by us, which we call the Sprocket Idler Wheel.
The purpose of this design is to reduce vibrations and provide smoother operation of the harvester, without compromising its original function.

Idler Wheel

Sprocket Idler Wheel