IPC-D-275, figure 4.9 on page 31 gives the formulas. At a glance, the .045R is too small for a .060 dia lead. The text is covered in 4.1.10. The correct lead center distance is particularly critical for diodes where cracking can occur where the lead joins the body of the part. ______________________________ Reply Separator _________________________________ Subject: ASSY Prepping radial leaded components Author: [log in to unmask] at SMTPpost1 Date: 7/31/96 1:12 PM We are preparing to purchase a GPD CF-15 component prepping machine. This machine uses a roller method to form leads. The die set for 0.040" to 0.060" dia. leads forms the lead with a radius of 0.045". This radius is less than what is specified in IPC-A-610B section 3.3, Table 3.3. The machine vendor has told our MFG Engineer that this is the way "many" assembly houses prep components. I am concerned on the reliablility of prepping to such a tight radius on the large lead. Does anyone have experience with this type of machine relating to IPC specified bend radius values? We can prep to Class 2 with the exception of several large lead diameter parts. I would handle this case with a statement that would exclude the large lead parts. Thanks for any information provided. Rick Vernon, QA Engineer, Phoenix International Corp. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************