In message <[log in to unmask]> [log in to unmask] writes: > Hi TechNetters, > > I would appreciate any information or recommendations you could give me > regarding test equipment or gauge suppliers (manufacturer or distributor > name/phone/website info) for testing shear strength and pull-off force/torque > strength of cured SMT adhesive. I saw a nice kit from Heraeus once, which included a hand-held torque measuring device and a number of bits to fit SMD devices. I dunno where there are located in the US, but you should be able to locate them via Nepcon catalogue or other usual source. A simple pull off tester can be made from a spring balance with a high-load marker and a bit of ingenuity. ====================================== ----> PULL (SPRING BALANCE) || _________ |||_________| <--- SMD ---------------------------------- PCB Excuse poor ASCII art! Make an 'L' shaped device (double lines above), attach to spring balance, pull SMD off, take measurement on balance. Perhaps a bit crude, but OK when making comparative tests of SMD adhesives, testing consistency of batches or evaluating cure schedules. When evaluating adhesives, do not underestimate the value of the Bristish Standard Drop test. Take boards with components loaded on adhesives cured to manufacturers' specs, drop on hard floor (all from same height), count components which have come off, draw conclusion. If you need one test, torque is perhaps best. Peter -- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Peter Swanson Oxfordshire, England INTERTRONICS [log in to unmask] http://www.cygnetuk.demon.co.uk Suppliers of materials and consumables to the electronics & related industries :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::