Technical Data Sheet for the "Jung" Model HF 50 Grinding Machine

Brand : Jung
Model : HF 50
Year of construction : 1979
Mass : 1500 kg
Dimensions of the Magnetic Chuck : 600 x 200 mm
Axis Travel :

• Longitudinal : 500 mm
• Transverse : 200 mm
• Vertical : 350 mm
  Installed power : 3.7 kW
  Spindle speed : Up to 2800 RPM (Adjustable)
  Machining accuracy : ±0.002 mm
  Cooling system : Integrated, with tank and pump for coolant
  Control type : Manual with some assisted controls

Technical Description

What is the "Jung" Model HF 50 Rectifier?

The Jung HF 50 grinder is a machine tool designed for finishing metal surfaces by removing material with great precision. This machine is particularly suited to achieving perfectly flat and smooth surfaces with extremely tight tolerances. It is primarily used in industrial environments, mechanical workshops, and precision departments for machining components that require high dimensional accuracy and surface finish.

What is it for?

The HF 50 grinder is used to finish hard metal surfaces, such as those of tools, molds, and mechanical components. It removes small amounts of material, leveling and polishing the surface of the workpiece. This machine is essential for ensuring components have flat surfaces and high surface quality, reducing imperfections and improving dimensional accuracy.

How to use it?

1. Preparing the Machine:

   • Turn on the machine and check that the cooling system is functioning and the coolant level is adequate.
   • Mount the workpiece on the magnetic chuck and activate the magnet to hold it firmly.

2. Stroke Adjustment:

   • Set the longitudinal, transverse and vertical travel according to the size of the piece and the type of machining required.
   • Adjust the spindle speed according to the material and the grinding wheel used.

3. Correction:

   • Start the spindle and begin grinding with light, progressive passes to remove material in a controlled manner.
   • Use coolant to prevent overheating of the workpiece and grinding wheel, maintaining a constant working temperature.

4. Control and Finishing:

   • Continuously monitor the quality of the ground surface, using measuring tools such as the dial gauge to ensure accuracy.
   • Once the job is complete, turn off the machine and carefully remove the piece.

Materials Used

The Jung HF 50 grinder is mainly used for working on:

• Hardened Steels : Often used in tools and molds, these materials require precise grinding to maintain their mechanical properties.
• Stainless Steels : Require a high surface finish for applications requiring resistance to corrosion and wear.
• Carbide Alloys : Used in industries such as aerospace and automotive for high-performance components.

Types of Grinding Machines

• Flat Grinders : Designed to obtain perfectly flat surfaces, as in the case of the Jung HF 50.
• Cylindrical Grinders : Used to work external or internal cylindrical surfaces.
• Tool Grinders : Specializing in the sharpening and grinding of cutting tools.
• Numerically Controlled (CNC) Grinders : They offer maximum precision and automation, ideal for series production.

Maintenance

1. Cleaning:

   • Clean the machine regularly, removing accumulated grinding dust and shavings.
   • Check and replace the coolant periodically to prevent the buildup of contaminants.

2. Lubrication:

   • Follow a lubrication schedule for guides, bearings and moving parts, using appropriate lubricants as directed in the manual.

3. Grinding Wheel Control:

   • Check the wear of the grinding wheel and replace it if necessary to maintain consistent working quality.
   • Balance the grinding wheel after each replacement to avoid vibrations that could compromise precision.

4. Security Check:

   • Make sure all guards are in good condition and that safety devices, such as emergency stop buttons, are working properly.

Why You Should Buy a Used "Jung" HF 50 Grinder

1. Reduced Costs : Buying a used grinder like the Jung HF 50 represents an opportunity to save significant money compared to purchasing a new machine, without compromising performance.

2. Brand Reliability : Jung is a brand recognized for the quality and durability of its machines, which, if well maintained, can operate effectively for decades.

3. Precision and Robustness : Even though it is dated, the HF 50 still offers high precision machining, thanks to the solidity of its construction and the quality of the materials used.

4. Spare Parts Availability : Despite its age, it is possible to find spare parts and assistance for this machine, thanks to the reputation and diffusion of the Jung brand.

5. Resale Value : Brand name grinders, such as the Jung HF 50, maintain a good resale value, making them a safe investment even in the long term.

This guide will provide you with all the information you need to get the most out of your Jung HF 50 grinder, ensuring precise workmanship and a long machine life.