10 TIPS for Improving Tool
The four critical requirements for tool holders are clamping force, concentricity, rigidity, and balance for high spindle speeds. When these factors are dialed in just right, there’s nearly no chance of holder error and considerable cost reduction is achieved thanks to longer tool life and reduction of down-time due to tool changes. Easier said than done, we share some quick-hitting advice for top tool holder performance in different situations.
1. Balance holders as a complete assembly
4. Rigidity can harm tapping operations
What many don’t realize about tapping operations is that a perceived strength of collet chucks, their rigidity, can actually be detrimental. Rigidity does very little to counteract the dramatic thrust loads imposed on the tap and part, exacerbating the already difficult challenge of weathering the stop/ reverse and maintaining synchronization.
Long-reach milling has some unique demands; when setting up this kind of job, always balance tool holders as a complete assembly. While many tooling providers pre-balance their holders at the factory, it’s often inadequate, especially for long- reach applications. 2. Holder damage can go from bad to worse quickly Wear and tear on holders can be costly in the end, but there are ways to protect against it. Inspect and care for holders. Trauma on a holder or spindle— dings, scratches, gouges, etc.—can magnify quickly. One bad holder can spread its problems like an illness. If you’re seeing disruptions like these on your holders, get them out of the rotation. 3. The rule of thumb on holder dimensions Looking for affordable ways to avoid vibration? Start by opting for a holder with a combination of the largest diameter and shortest length possible.
5. Balancing is crucial to five-axis machining
Five-axis machining introduces a whole new set of tooling challenges. While important in any type of machine, balance may be of most importance in ‘full five-axis work’. A well-balanced holder helps ensure the cutting edge of the end mill must be consistently engaged with the material in order to prevent chatter and poor surface finish quality. 6. Consider spindle speed when choosing between shrink-fit and hydraulic If you have to choose between shrink-fit and hydraulic holders in a long-reach application,
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