Hello,
Without getting into specifics about the type of dust, I would not be too worried about the dust itself, provided that the drills are not damaged/chipped in any way.
When your drilling machine starts, usually the vacuum valve opens a bit before the actual drilling takes place and so your dust will be vacuumed anyway.
Since the drilling action produces a considerable amount of dust, which is supposed to be vacuumed away - your initial dust will not add risk.

However, dust accumulation is usually a sign of the way of handling/packing/shipping of the drills. If you are sure that at your drillroom there is no problem with handling, I would check the supplier. If drills are standing out in the open, in a way that allows dust accumulation, there is also a risk for accidental  physical damage to them.

Best regards,
Yehuda

Yehuda Weisz
Tel: (972)-3-6342045
Cel: (972)-53-556897
----- Original Message ----- 
From: "Parial Swati" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, February 18, 2004 12:35 PM
Subject: [TN] Drill bit problems


> Dear Technetters,
> We have started observing a lot of dust in the drill bits before using
> them.
> This is observed both in the new drill bits as well as re-sharpened drill
> bits.
> Can any one help us out to know what is the effect of this dust on the
> quality of drilling.
> Regards,
> Swati...
> 
> Scan by AT&S virus protection
> 
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