RE: [mfg-smartcam] Leaded Tin Bronze..... reaming?

[Mike Sharp]

I have done this kind of stuff, I relieved the reamer back so it had only about 1" of flute and this reduced the tool contact area so the part would not grab the tool. This type of material loves to grab cutting tools.   Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jon Baker Sent: Monday, November 20, 2000 9:23 AM To: [EMAIL PROTECTED] Subject: [mfg-smartcam] Leaded Tin Bronze..... reaming? Hey everyone, how about a non-smartcam question.     I am making a housing out of leaded tin bronze, and it has a 5" deep, 1.250 /1.2505 dia hole thru it.  I currently had a plan of core drilling, which worked well, pre-boring to 1.235, which worked well, and then reaming to 1.250, which didn't work.  The reamer grabbed and spun in the TG100 collet and got jammed up tight.  Running on a Fadal machine at 150 rpm and 3.0 ipm, I think the material just kinda flowed out of the way and then grabbed the flutes of the reamer.  Any suggestions on this ?  I was thinking of opening the pre-bore to 1.240/1.245 to relieve some pressure...  The coolant is flowing down thru the flutes fine, so I don't think it is a flow issue.  The finish of the bore looks great for the 1.50 inches that I made it down, but alas, there it stayed. If anyone has some pointers on this cast bronze stuff, shoot me back a response.  Thanks in advance Jon