In the world of precision machining, every micron matters.
When a Mazak HCN4000-II spindle arrived at Spintec, it carried with it the weight of semiconductor parts manufacturing expectations.
The challenge:
Runout issues that affected surface finish and threatened the quality of machined parts.
Our mission:
Is to restore this spindle to its peak performance.
The Problem
The spindle’s runout at the front measured 18 microns, while at 300 mm, it ballooned to a concerning 120 microns. The resulting chattering marks on the machined parts hinted at a deeper issue—perhaps a loss of preload. Our team of skilled technicians rolled up their sleeves, ready to diagnose and heal this critical component.
The diagnosis
Upon disassembly, we discovered that the accuracy woes were not solely due to bearing wear. A lesser clamping force compounded the problem. It was time for a comprehensive overhaul.
The Spintec Solution
- Bearing Replacement:
- We replaced both front and rear bearings, ensuring optimal load distribution and minimal runout.
- The new bearings were precision-matched to the spindle’s requirements.
- Disc Spring Set Replacement:
- Our technicians meticulously swapped out the entire disc spring set.
- These springs play a crucial role in maintaining preload and stability.
- BT-40 Taper Correction:
- The taper is the heart of any spindle. Our Computerized Grinding (CG) process corrected the BT-40 taper, ensuring perfect alignment.
- A snug fit between the tool holder and the spindle is essential for precision machining.
The Outcome
After our thorough intervention, the spindle emerged with newfound accuracy. At 300 mm, the runout had shrunk to an impressive 9 microns—a testament to our commitment to excellence.
Conclusion
The Mazak HCN4000-II spindle returned to its semiconductor parts manufacturing customer, ready to tackle intricate tasks with unwavering precision.
At Spintec, we do not just repair spindles; we elevate them to their full potential. When microns matter, trust us to make the difference.
For us at Spintec, Precision is not just a measurement—it is our passion.
