Used JUNGNER US-450 grinder
| Parameter | Specification |
| Stock Number | 83577 |
| Brand/Origin | JUNGNER / Sweden |
| Model | US-450 |
| Table Size | 800*114mm |
| Longitudinal Feed | 450mm |
| Cross Feed | 300mm |
| Max Spindle Diameter | 150mm |
| Spindle Motor Power | 1.5kw |
| Spindle Speed Range | 3500-7000rpm |
1. Equipment Overview: The Pinnacle of Swedish Engineering
When it comes to high-precision grinding, the name JUNGNER stands as a symbol of Swedish industrial excellence. The JUNGNER US-450 (Stock No. 83577) is a testament to the longevity and precision that machines from Northern Europe are famous for. This universal tool grinder is designed for workshops that demand micron-level accuracy without sacrificing the versatility required for diverse machining tasks. Built with high-grade cast iron and featuring a highly ergonomic layout, the JUNGNER US-450 remains a preferred choice for toolmakers worldwide.
The pre-owned nature of this machine does not detract from its performance; rather, it highlights the superior material choices made during its manufacture. JUNGNER machines are known to retain their structural integrity for decades. For businesses looking to enhance their tool-sharpening or component-grinding capabilities, the US-450 offers a level of stability and smoothness that modern, lower-cost alternatives often struggle to match. It is more than just a grinder; it is a legacy of precision engineering ready to be integrated into your production line.
2. Technical Deep Dive: Understanding the Specifications
The JUNGNER US-450 is engineered with a focus on balanced performance. The table dimensions of 800*114mm provide a long, stable platform for securing intricate tools and long workpieces. What truly sets this machine apart is the 450mm longitudinal feed combined with a 300mm cross feed. This generous travel range is exceptional for a machine of its footprint, allowing operators to handle larger workpieces or multiple setups in a single clamping. The movement is fluid and precise, minimizing the physical effort required while maximizing the output quality.
The heart of the JUNGNER US-450 is its spindle system. Powered by a 1.5kw motor, it provides the perfect torque-to-speed ratio for precision grinding. With a spindle speed range of 3500 to 7000rpm, it accommodates various grinding wheel materials, from standard aluminum oxide to advanced diamond or CBN wheels. The maximum spindle diameter of 150mm allows for a wide array of wheel sizes, making it versatile enough for both rough grinding and fine finishing. The Swedish-designed spindle bearings ensure minimal thermal expansion and ultra-low vibration, even at the maximum 7000rpm speed.
3. Application Scenarios: Versatility Across Industries
In the aerospace and defense sectors, where component tolerances are often measured in microns, the JUNGNER US-450 is frequently used for finishing small, critical parts. Its ability to maintain consistent accuracy over its entire travel range makes it ideal for grinding specialized turbine components or high-strength fasteners. Similarly, in the mold-making industry, the US-450 is an indispensable asset for sharpening complex punches and dies, ensuring that production tools remain sharp and efficient.
Beyond specialized manufacturing, this machine excels in the maintenance of cutting tools. CNC workshops often use the US-450 to re-grind custom milling cutters and drills, significantly reducing the cost of consumables. The Swedish precision allows for the restoration of original geometries, ensuring that re-sharpened tools perform as well as new ones. This versatility makes the US-450 a "Swiss Army Knife" for any high-end machine shop, capable of adapting to the ever-changing demands of the modern industrial landscape.
4. Value Proposition: Why Choose a Used JUNGNER?
The primary advantage of purchasing a used JUNGNER US-450 is the exceptional ROI (Return on Investment). A new grinding machine of this caliber would require a significant capital expenditure that may not be justifiable for many small to medium enterprises. By choosing a well-maintained used unit, you gain access to world-class Swedish technology at a fraction of the cost. The US-450 holds its value exceptionally well, making it not just a tool, but a liquid asset in the secondary machinery market.
Furthermore, the simplicity of its mechanical design means that you are not tied to proprietary software or expensive OEM-only repairs. Standard high-quality bearings and electrical components can keep this machine running for another 20 years. For a workshop looking to transition from manual grinding to high-precision results, or for a factory needing to add redundant capacity for tool maintenance, the JUNGNER US-450 represents the perfect balance of cost, quality, and capability.
5. Frequently Asked Questions (FAQ)
Q1: Can the JUNGNER US-450 handle wet grinding?
A: Yes, while many tool grinding tasks are performed dry, the JUNGNER US-450 can be equipped with a standard coolant system to handle heat-sensitive materials and high-speed grinding operations.
Q2: Is the machine compatible with universal dividing heads?
A: Absolutely. The 800mm table is designed with standard T-slots that accommodate most universal dividing heads, tailstocks, and magnetic chucks, enhancing its flexibility for gear or flute grinding.
Q3: What power supply is required for this Swedish machine?
A: It typically operates on a standard industrial 3-phase power supply. Depending on your region, a simple transformer or phase converter may be used if your local voltage differs from the European standard.
Q4: How does the JUNGNER US-450 compare to modern CNC grinders?
A: While it lacks automated tool paths, the JUNGNER US-450 offers superior tactile feedback and faster setup times for one-off parts or simple tool repairs, where programming a CNC would be time-prohibitive.
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