See below John Parsons -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Franklin Asbell Sent: Friday, November 18, 2005 2:25 PM To: [log in to unmask] Subject: [TN] Drilling questions Can someone explain to me what the Letter/Numbers in a drill program mean? The following is a line from a drill program C0.0098F036S110.B0800Z-0.012H350 C0 = Starts the program 0098 = Drill (tool) size [John Parsons] C0.0098 = tool diameter (inches) F036 = Feed, but what is 036?[John Parsons] Feed Rate (ips) S110 = 11000 or 110000 RPMs[John Parsons] RPM (110000) B0800 =[John Parsons] Macro Code ?? (we never use these so I can't provide more detail) Z-0.012 =[John Parsons] Z-axis height adjustment from datum H350 = 350 drill hits[John Parsons] Max hits allowable for this tool before change Also, can someone provide a simpler method for determining chip load?[John Parsons] I have attached a calculator that you may find useful. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------