Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

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Press fit parts help

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Press fit parts help | 14 October, 2014

We use a few different style of press fit connectors, terminals, studs, etc. We use a tabletop arbor press for most everything we do, but a lot of times we will see some measling or slight delamination around the holes for the press fit part. Is there anything recommended besides an arbor press?

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Press fit parts help | 14 October, 2014

You could check the data sheets/web sites from the manufacturers of the press-fit parts. They typically will identify the recommended tooling/equipment necessary to install their components.

Generally, pneumatic presses are suggested, with controllable amounts of force. If you're using a table-top, manually operated arbor press, the amount of force being used can't be regulated, or, most times, even determined. It seems likely that too much force is being used to install the component causing the measling.

Cheers, ..rob

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Press fit parts help | 14 October, 2014

Accuracy of the arbor press might be made better by tightening the adjustable gibs on the ram if any. If you can use support under the board have the ID of the support just slightly larger than the pins being pressed. Janesville Tool makes an accurate little arbor press, if you look at it make sure the throat is deep enough to reach all your pin locations.

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Press fit parts help | 15 October, 2014

Are you using specific tooling for each part, or just generic? If so it could be pushing down at an angle and slightly tearing the PCB. We use the same style press as you but make custom fixtures to fit each connector and hold each PCB tight.

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