> There is no ideal drill speed for all size drills, but for simplicity,
> 4600 rpm is recommended for drills up to 1/4" and 2300 rpm for 3/8" &
> 1/2" diameter.
Then you need to consider the depth of the material and it's softness. Soft
ali will require a slower speed than hard ali. Brass can be quite quick and
doesn't need any lubrication. Stainless should be quite slow with a
suitable lubrication, but mild can be a medium sort of speed.
No one can reccomend a speed to set the drill up for as it will need
depending on what you are drilling. There is no one-speed-for-all setting.
Cheers,
Mark.
________________________________
Mark Jackson - 07050 645590
europa-builder@ntlworld.com
http://harley.pcl.ox.ac.uk/~mark/Europa
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