Gary
Member
I noticed something this weekend that I would like to share with everyone, especially folks new to woodworking and/or penturning). In the Blank Preparation section of the CSUSA instructions for the Ligero pen kit, it's stated "Set the drill press speed to 2000-3000 rpm, then drill each blank..."
That is not only erroneous, but to do so is unsafe. The drill bits used for the Ligero are 31/64" & 17/32" (both very close to 1/2"). A 1/2" bit should NEVER be run at 2000 rpm much less 3000. A check of most commonly used drill press speed charts will tell you that a 1/2" bit should be run in hardwood at 750-1000 rpm.
At 2000-3000 rpm, not only are you in an unsafe mode, but with bits that large you run the risk of heat stress (loss of temper), and you increase the risk of blowing up those thin-wall valuable blanks.
Just a word of caution...now all of you do as you please. I'm not here to lecture.
That is not only erroneous, but to do so is unsafe. The drill bits used for the Ligero are 31/64" & 17/32" (both very close to 1/2"). A 1/2" bit should NEVER be run at 2000 rpm much less 3000. A check of most commonly used drill press speed charts will tell you that a 1/2" bit should be run in hardwood at 750-1000 rpm.
At 2000-3000 rpm, not only are you in an unsafe mode, but with bits that large you run the risk of heat stress (loss of temper), and you increase the risk of blowing up those thin-wall valuable blanks.
Just a word of caution...now all of you do as you please. I'm not here to lecture.