Lou -
I've looked over some of the excellent responses you have had thus far to
your question. In my experience, I mostly agree with Jim Moffitt's response.
All other things being equal, I've taught hand soldering assemblers to start
at 550 F and work their way up from there. Most solder joints for
through-hole can adequately be made at 600 - 650 F. When you start getting
to 700 F and over you have a process problem. For example, the wrong size
tip, the wrong tip length, the wrong tip shape, the wrong wattage iron, a
board layout causing heat sinking, improperly tinned iron, wrong flux, an
uncalibrated soldering iron, an untrained assembler, etc, etc.
The tip temperature provides a good indicator for the average assembler of
whether or not they have a process problem. My rule of thumb is: if the
assembler hits 700 F or higher to solder a connection, they need technical
help to resolve the problem. I hope this helps answer your question.
Ed Valentine
Electronics Manufacturing Solutions
8612 Mourning Dove Road, Raleigh, NC 27615
Phone: (919) 270-5145, Fax: (919) 847-9971
Email: [log in to unmask]
Website: http://www.ems-consulting.com
----- Original Message -----
From: "Lou Hart" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 28, 2000 1:18 PM
Subject: [TN] Soldering iron temperature
TechNetters, believing that the only dumb question is the one you don't ask,
let me inquire - How do you choose temperature for a hand soldering iron?
(I'm not referring to the Metcal ones with those special tips.)
I am working with our production people to prepare work instructions. For
hand soldering, some people say 700 F, some 750 F. My suspicion is there
may not be one temperature to use all the time. Any comments would be much
appreciated.
Lou Hart
Quality Assurance Manager
Compunetix
412-858-6184
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