Is a centering process always necessa...
Centering is performed to improve hole position accuracy and to suppress unstable behavior at the hole entrance during machining. However, if there is no st... 詳細表示
What causes hole enlargement during d...
Hole enlargement occurs due to tool runout or chattering during machining. In addition, runout at the time of tool installation affects both hole diameter a... 詳細表示
Why does a drilled hole become polygo...
It is likely caused by drill runout during machining. Possible Causes ① Runout when mounting the drill Countermeasure: Keep mounting runout within 20 μm ... 詳細表示
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