There are a lot of reasons not to trim these types of leads among them are mechanical shock to the component, damage to the solder connection if soldered in place (causes fractures during operational cycling), Exposed base material (usually not copper for these), Damage to the board, etc. Years past we had specific shear cutters that could perform an OK job on leads such as DIPs without transferring as much shock to the component but I would certainly not attempt their use on PGAs. Mel Parrish Soldering Technology International Madison, AL 256 705 5530 256 705 5538 Fax [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Charles Caswell Sent: Wednesday, October 17, 2001 3:47 PM To: [log in to unmask] Subject: Re: [TN] Trimming Leads... If the pins are tempered they should not be trimmed. Also IPC 610 and J-STD 001 say " should" a recomendation. If they don't cause a problem in processing. Like catching on the fluxer at wave solder and do not pose a problem mechanically in the end item you "should not" ( my recomendation) have to trim. We don't unless specified on the documentation except where the lenghth causes a problem later. Charles Caswell Process Lead, PCB Frontier Electronic Systems -----Original Message----- From: TechNet E-Mail Forum. [mailto:[log in to unmask]] Sent: Wednesday, October 17, 2001 4:58 PM To: [log in to unmask] Subject: [TN] Trimming Leads... Hi All, I've got a question about trimming leads on components such as three-row DIN connectors, machine pin sockets, PGA devices, things like that... In the past, I've never trimmed the leads on components like that. But I can't find any reference that says those are things that you don't lead clip... The reason I'm asking is the -610 and J-STD say that for class-3, the leads are not supposed to be longer than 1.5mm (.0591"). Should leads be clipped on the kind of components I outlined above if they exceed that? Thanks!! -Steve Gregory- ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------