If you're looking for a reliable, high-performance used universal grinder Grisetti RT-A is an excellent choice. This well-maintained machine, used primarily for occasional repairs, still delivers on its promise, making it a real bargain for those seeking quality grinding at a reasonable price. The Grisetti , known for the precision of its machine tools, designed this model for high-precision machining, both internal and external, making it extremely versatile.

Appearance and components

The Grisetti RT-A features the aesthetics typical of robust and well-built machine tools. The main frame is made of cast iron to reduce vibration and increase stability during machining. The controls are ergonomically positioned for easy access, facilitating the control of various operating parameters. Although it is a used machine, the Grisetti RT-A has been well maintained, and this is reflected in the machine's overall appearance: smooth surfaces, functioning levers and knobs, and minimal visible signs of wear.

Dimensions and technical specifications

This universal grinder offers a full working capacity for both internal and external grinding . The worktable dimensions are generous, with a maximum grinding length of approximately 800 mm and a maximum grinding diameter of 300 mm . The workhead is tiltable and equipped with a quick-release system, while the tailstock ensures precise and stable positioning of the workpiece.

The main motor power is around 3 kW , sufficient to ensure smooth and consistent machining even on the hardest materials. The spindle speed is adjustable, with a range of up to 3000 revolutions per minute (rpm) , allowing for perfect adaptability to surface finishing needs.

Mechanical characteristics

The Grisetti RT-A is a precision grinder, perfect for high-quality work on mechanical parts requiring tight tolerances. The automatic carriage feed system ensures smooth and precise movement along the X and Y axes, with positioning accuracy of a few microns. Thanks to the ability to work on both external and internal surfaces , this machine can be used to grind shafts, bushings, bearings, gears, and other mechanical components requiring a perfect finish.

How to use it

Using the Grisetti RT-A grinder is relatively simple and intuitive, but requires precision grinding expertise. After clamping the workpiece between the headstock and the tailstock, the operator can begin adjusting the spindle speed and cutting depth based on the type of material being machined and the desired finish. The automatic feed system allows for extremely precise surfaces, reducing the need for manual intervention and the risk of errors.

Matching accessories

One advantage of the Grisetti RT-A is the ability to equip it with various accessories to expand its operational capabilities. Grinding wheels of different sizes and materials , depending on the type of machining to be performed and the material to be ground. Furthermore, the machine can be equipped with thread grinding or automatic measuring to ensure even greater precision during grinding operations.

Usage parameters and mathematical formulas

To get the best performance from the Grisetti RT-A , it's important to consider some parameters. The peripheral speed of the grinding wheel, for example, is calculated with the formula:

$$V$$

Where:

• V is the peripheral speed of the grinding wheel (m/min),
• D is the diameter of the grinding wheel (mm),
• n is the rotation speed of the grinding wheel (rpm).

Setting these parameters correctly based on the material to be worked and the type of finish required is essential to get the most out of the machine.

Workable materials

The Grisetti RT-A can grind a wide range of materials, including steel, cast iron, bronze, and hard materials such as carbides and hardened steels. This versatility makes it suitable for a wide variety of applications, especially in mold making, machinery maintenance, and mechanical component repair.

Maintenance

Proper maintenance is essential to prolong the operating life of the Grisetti RT-A . The machine requires regular cleaning of the contact surfaces and work area, as well as periodic inspection of the grinding wheels for wear or damage. Lubrication systems must also be inspected regularly to ensure that all moving parts operate without excessive friction.

Safety and compliance with current regulations

The Grisetti RT-A , like many machine tools, may not comply with the latest CE , especially if purchased used. However, it can easily be upgraded with the installation of appropriate protections, such as safety screens and emergency stop systems

How to evaluate if it is a good used car

Before purchasing a Grisetti RT-A , it's essential to check the machine's overall condition. Checking the wear of moving parts, verifying the accuracy of its movements, and testing the spindle speed are all essential steps to ensure you're getting a good deal. Another indicator of a well-maintained machine is the technical documentation and maintenance records that accompany it.

Sectors of use

The Grisetti RT-A is widely used in sectors such as:

• Precision mechanics,
• Mold construction,
• Mechanical repairs,
• Automotive.

Why is it worth buying a used Grisetti RT-A?

Opting for a used Grisetti RT-A represents an excellent option for those seeking a quality machine without spending the price of a new one. This model, even when used, retains its value thanks to its solid construction and precision. Furthermore, with regular and careful maintenance, the Grisetti RT-A will continue to provide high performance for many years. Compared to purchasing a new machine, choosing a well-maintained used machine allows you to save significantly without sacrificing quality.