Detailed Technical Data Sheet for Used CNC Grinding - Junker Brand Model BUAJ 30 CNC

General Overview

The Junker CNC grinding model BUAJ 30 is a high-precision machine tool designed for external machining of mechanical components. Produced in 1995, this machine represents an excellent combination of robustness, precision and automation. It is equipped with a Fanuc 0-GC command and control system, known for its reliability and versatility, making it an ideal choice for machine shops that require precision in the grinding of cylindrical components.

Technical Specifications

• Brand: Junker
• Model: BUAJ 30 CNC
• Year of Construction: 1995
• Serial Number: 352
• Control System: Fanuc 0-GC
• Table dimensions: 1380 x 160 mm
• Grinding wheel dimensions: 400 x 63 x 127 mm
• Own weight of the machine: 2800 kg
• Power supply: 380 V three-phase
• Spindle Speed: Variable, adjusted by CNC control to adapt to different materials and operations.
• Race of Aces:
  • X axis (diameter): Up to 300 mm
  • Z axis (length): Up to 1000 mm
• Cooling System: Included, with closed circuit for water cooling of the grinding wheels and the piece, essential for maintaining precision during grinding operations.

Main Components

• Grinding Spindle: The grinding chuck is designed to support large grinding wheels, up to 400mm in diameter. It is powered by a powerful motor and regulated via the CNC system, ensuring high working precision.

• Work Table: The table has a surface area of ​​1380 x 160 mm, offering a large working area for grinding large workpieces. The movement of the table is controlled by the CNC system, allowing precise and repeatable positioning of the piece.

• Control System: The Fanuc 0-GC is a highly reliable CNC control system, with user-friendly interface that allows you to program complex grinding operations with high precision.

• Cooling System: The machine is equipped with a recirculating water cooling system to prevent overheating during processing, thus maintaining the dimensional stability of the piece and prolonging the useful life of the abrasive wheels.

Mechanical Characteristics

• Precision: The Junker BUAJ 30 CNC grinding is designed to guarantee high precision thanks to the Fanuc CNC system and the linear guides on which the axes move. It can machine cylindrical parts with tight tolerances, ideal for high-precision components.

• Rigidity and Stability: The cast iron structure of the machine ensures high rigidity, minimizing vibrations during operation and ensuring an excellent surface finish.

• Versatility: Capable of processing a wide range of materials, including hardened steels, cast iron, and light alloys, thanks to fine adjustment of the rotation speed of the grinding wheel and adaptation of the grinding process via CNC control.

Workable Materials

The machine is ideal for grinding:

• High strength steels
• Alloy steels and stainless steels
• Cast iron
• Light alloys (aluminium and its alloys)
• Hard materials such as cemented carbides

Maintenance

• Cleaning and Lubrication: It is essential to keep the guides clean and regularly lubricate the ball screws to ensure smooth and precise movements of the axes.

• Checking the Wheels: The wheels must be checked regularly to avoid imbalances that could compromise the quality of the grinding. It is also advisable to dress the grinding wheel periodically.

• Cooling System: Check the level and quality of the coolant, replacing it according to the manufacturer's instructions to prevent overheating and premature wear of the grinding wheels.

Evaluation of used cars

To correctly evaluate the quality of a used grinding machine such as the Junker BUAJ 30 CNC, we recommend:

• Check the Fanuc 0-GC control system: Make sure it is fully operational and up to date.
• Inspect the condition of the guides and ball screws: These components must be in excellent condition, with no signs of wear or excessive play.
• Test machine accuracy: Request an operational test to evaluate the machine's ability to maintain specified tolerances.
• Condition of the cooling system: Check that there are no leaks and that the system is functioning properly.

Sectors of Use

The Junker BUAJ 30 CNC is mainly used in:

• Automotive : For grinding components such as camshafts, crankshafts and other critical parts.
• Aerospace Industry : For the production of components requiring high precision and quality surface finishes.
• Tool Manufacturing : In the production of cutting tools and machine parts that require very tight tolerances.
• General mechanical engineering : For the machining of cylindrical parts and precision mechanical components.

Why is it better to buy it used?

Purchasing a used grinding machine like the Junker BUAJ 30 CNC can be extremely advantageous, especially considering the high cost of new machines in this category. The solidity of the construction and the quality of the components guarantee a long operating life, even in the case of used machines. Furthermore, the Fanuc control system is widespread and easily maintainable, reducing operating costs in the long term.

Conclusion

The Junker BUAJ 30 CNC is a high precision external grinding machine, ideal for companies that need a reliable and versatile machine for processing mechanical components. Despite being used, if properly maintained, this machine can offer excellent performance, representing a smart investment for those looking for quality at an affordable price.