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1. Has anyone been successful finding a way to recycle entry materials that are not pure aluminum? My perception is that the suppliers of these materials have not generated a recycling source and show little movement in that direction. Considering the amount of material involved, it seems like a worthwhile endeavor.

2. Can anyone recommend the best entry material? Which material provides the most robust drilling process?

3. It appears that the difference between net cost of pure aluminum (price - recycle value) and the cost of purchasing composite materials is too large to justify switching from pure aluminum. Has anyone found a way to justify to management that microdrilling requires something better than pure aluminum?

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Previous message: drilbert: "entry mat'l"

You might try the Feed rates on microdrills you can use without breaking the bits; time is money. Hopefully a test study will do & you won't have to collect the pieces to show them.

Good Luck,

Tom Waznis
Hallmark Circuits Inc.
619-453-7800