I AM SELLING A USED JINLING LATHE, MADE IN CHINA. YEAR OF CONSTRUCTION 2014. BRAND: JINLING. MODEL: CW 62143 C 4500. MAXIMUM LENGTH: 4500MM. MAXIMUM WEIGHT: 7000KG. COMPLETE WITH DISPLAY. PRICE ON REQUEST.

The Jinling CW 62143 C 4500 is a machine primarily used for metalworking, particularly for turning long and heavy workpieces. Below is a comprehensive overview of its operation, use, types of lathes available, workable materials, alternative machines, calculations for optimizing operation, and reasons why it might be worth purchasing a used model.

How a Lathe Works and How to Use It

A lathe works by clamping a piece of material onto a rotating spindle, while a cutting tool (such as a turning tool) is brought close to the workpiece to remove material in a controlled manner, creating the desired shape. The Jinling CW 62143 C 4500 is designed to machine workpieces up to 4500 mm long, and is particularly suitable for turning shafts, cylinders, and other long components.

Phases of use:

1. Clamping the workpiece: The workpiece is mounted on the lathe spindle and clamped in place.
2. Tool Setup: The cutting tool is placed in the tool holder and adjusted to get close to the workpiece.
3. Starting the machine: The spindle begins to rotate and the tool is gradually advanced against the workpiece to remove material.
4. Process Control: The operator monitors the process to ensure that the part is machined accurately.
5. Finishing: Once the desired shape has been obtained, any finishing touches are carried out to improve the surface of the piece.

Types of Existing Lathes

There are different types of lathes, each designed for specific machining operations:

1. Parallel lathe: Used for the machining of cylindrical pieces, it is the most common type.
2. Computer Numerical Control (CNC) Lathe: Programmable automated machine for performing complex machining operations with high precision.
3. Front lathe: Suitable for machining workpieces that are large in diameter but short in length.
4. Vertical lathe: Ideal for working large discs or rings.
5. Revolver lathe: Used for the mass production of small pieces.

Workable Materials

The Jinling CW 62143 C 4500 can machine a wide range of materials, including:

• Steel (carbon, alloy, stainless)
• Cast iron
• Aluminum
• Brass
• Copper
• Industrial plastic

The choice of cutting tool depends on the material being worked, with some tools specifically designed for hard or abrasive materials.

Reciprocating Machinery

While versatile, a lathe isn't always the only option for machining. Some alternative machines include:

• Milling machines: Used for operations such as drilling, milling and shaping flat surfaces.
• Grinders: Used to obtain very smooth and precise finishes.
• Boring machines: Used to enlarge and finish cylindrical holes.
• Numerical Control Machines (CNC): Multi-functional, these machines can perform turning, milling, drilling and other complex machining.

Calculations to Optimize Operation

Optimizing the operation of a lathe like the Jinling CW 62143 C 4500 requires precise calculations, including:

• Cutting speed (V): Depends on the material of the workpiece and the cutting edge, and is calculated with the formula V=π⋅D⋅n1000V = \frac{π \cdot D \cdot n}{1000} $V$ $=$ 1000 π ⋅ D ⋅ n ​, D is the diameter of the workpiece and n is the spindle speed in revolutions per minute (RPM).
• Feed (f): The speed at which the tool advances along the workpiece, usually expressed in mm/rev.
• Depth of cut (ap): The amount of material removed in one pass, important for determining power requirements and tool wear.
• Cutting Power (Pc): It can be calculated to check whether the lathe has the power needed to perform the desired cut without overloading.

Why You Should Buy a Used Lathe (Jinling Model CW 62143 C 4500)

Buying a used lathe like the Jinling CW 62143 C 4500 can be advantageous for several reasons:

1. Cost savings: Used machinery costs significantly less than new machinery, reducing the initial investment.
2. Reliability and durability: Lathes like the Jinling CW 62143 C are known for their durability. A well-maintained model can operate efficiently for many years.
3. Adaptability to your needs: This model, with a maximum length of 4500 mm, is ideal for working long pieces, offering flexibility for different types of machining.
4. Spare parts availability: Even if the model is used, spare parts are likely still readily available, especially for machines from established brands.
5. Time-Tested: A used lathe has already proven its capabilities, reducing the risk of manufacturing defects or teething problems that might arise on a new machine.

In summary, purchasing a Jinling CW 62143 C 4500 can be an economical and practical solution, especially if you need a robust and reliable machine for machining long and complex parts.