On Aug 4, 1:21 am, Ben Holko <[email protected]> wrote: > for a 1/2" hole 3-4mm thick in aluminium any general purpose bit designed for > wood/steel will work, just go slow and use some cutting lubricant. >
Two other pieces of useful advice: 1) Use a drill press, and clamp the workpiece to the table, if you want accurate hole positioning. Hand-held drilling is right out of it. 2) For large holes, center-punch the location and start with a smaller drill (say, 3/16), and proceed upward in size by increments. Leave the fixturing and clamping in place during this process. You'll get less tool wander by starting with a small drill bit that gets "captured" in the dimple made by the center punch than by starting with a big drill. -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
