I need to drill a number (40-50) of 1/8 inch holes in various aluminum parts ranging to 3/4 inch. What is the best bit and bit parameters for that job. My machine as shown Openbuilds 1510. My first attempt broke the bit after 2 holes.
It's a heat issue. You NEED some form of active chip evacuation and cooling if you want to drill that deep and that many holes. Heat builds up really quickly when chips are recut. The brake happens after the end mill has welded itself. TiCN and ZRN coatings work well with aluminum. AVOID anything with aluminum in it such as AlTiN. You'll be better off with no coating. On my Sphinx (Bosch Palm Router), I stuck to this, but that's not going to last in a 3/4" hole either unless you have the above. 3mm diameter, 1mm peck, 40mm plunge, 20k rpm Drilling and routers don't really go well together due to the high rpm. A boring operation would be ideal if the hole was any larger.
Thanks, I will try the spot drilling. Should I lower the rpm on the router? Any particular bit recommendations? Rick
I did at one point pick up 3mm drills for cnc, but for this I would use something like this from amazon or this maybe even better Gary
Ah, I'd say to go with a wider angle tip like these. Your spot should be wider than your actual drill. LakeShore Carbide.com Carbide End Mills-Carbide Thread Mills
