Spindle upgrade // Crash and overload protection with new aerostatic hybrid bearing system
- June 5, 2024
- Posted by: Anna-Lena Roiger
- Category: Applications, News and Updates
The full video of our test trials can be found at the end of the page.
Machine builders and operators know how easy it is to damage a machining spindle. Tool collision or wrong programming/ settings can often lead to spindle repairs or replacements in a tenth of a second, causing significant downtime and costs. We can now offer a solution with our newly developed aerostatic hybrid bearing technology. In the case of a spindle overload or collision, the shaft does indeed and still touch down on the bearing face, but due to the enormous contact area and a hard-lubricating of the material pair, the shaft, and the bearing faces are not damaged, saving you time and money. Of course, you are going to need a new tool.
Cost and time savings (no repair necessary)
No damage to the spindle (overload protection)
Enlargement of the permissible tool diameter
Overload and crash trials
In intensive tests, we deliberately overloaded the bearings and the motor of the same spindle (ASD060H25A) several times, causing tool breakage and even collisions with the workpiece.
The results were beyond our expectations: The spindle bearing remained undamaged. We simply had to replace the tool and could continue working with the same spindle. This demonstrates the robustness and reliability of our new aerostatic hybrid bearing system.
DETAILS
Topic: | Product upgrade |
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Date | June 2024 |
Available from | immediately |
Data from the test trials
The bearing limits could only be tested by letting the tool collide with the workpiece because, in the case of a bearing overload, the drive reported a motor current limit, making it inconclusive whether a touchdown had caused this error.
Test results, contour milling (overload, but without machine error)
Material | 1.4057, HRC43 |
Face milling cutter | Diameter ⌀ 5 mm, 4 Cutting |
Speed | 32,000 rpm (equals 500 m/min) *) |
Cutting depth (ap) | 5 mm |
Radial cutting depth (ae) | 0.3 mm |
Feed rate (f) | 10 m/min |
*) 200% above the recommended cutting speedt |
Test Resuts for finding motor power/current limit *)
Material | 1.4057, HRC43 |
Face milling cutter | Diameter ⌀ 4 mm, 4 Cutting |
Speed | 11,000 rpm (equals 140 m/min) |
Cutting depth (ap) | 5 mm |
Radial cutting depth (ae) | 0.3 mm |
Feed rate (f) | 10 m/min |
*) 10A nominal, 19 A peak, I²t 5 seconds |