Hi Barry, Ask your customer to provide you with appropriate drill parameters such as speed & feed, chip load etc. which depends on the type of material and the panel thickness. If it were me I'd want to use an entry and exit material. I'd also be interested in their quality criteria for acceptable holes. Hans ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hans M. Hinners Process Engineer Toppan Electronics, Inc. 770 Miramar Road San Diego, CA 92126 (858) 695 - 2222 ext. 241 (858) 695 - 6823 fax [log in to unmask] -----Original Message----- From: Barry Gallegos [mailto:[log in to unmask]] Sent: Friday, January 26, 2001 6:09 AM To: [log in to unmask] Subject: [TN] Drilling through Assemblies Good day to all. We have accepted an order of PCB's to assemble for a customer. this customer has requested that we make some modifications to the boards that they are providing. the want for us to Drill several holes in the board to insert some through hole components into. my question is this. is there any special type dill press that we should use, or any special type of drill bit. what speed should the drill run at and any other special precautions that I should be aware of. Barry Gallegos, PE Western Electronics, LLC 1550 South Tech Lane Meridian, Idaho 83642 Phone 208-955-9771 Fax 208-955-9751