Quote:
Originally Posted by JamesCH95
We have had great luck installing PEM nuts with a machine vise, and a 1-ton arbor press can be had for <$100.
When PEM nuts have been popped out we have had good luck with holding the nut in place with pliers and re-cinching it with a light-duty cordless impact driver. It only takes a few moments, and can even be used to install the PEM nut in certain circumstances.
We are careful to use riv-nuts in truly 'blind' applications and PEM nuts in more accessible locations, where a press/clamp/pliers can get to.
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Your strategy of mixing riv-nuts and cinch nuts makes perfect sense. Do you use the pliers and impact driver for cinch nuts that the arbor press cannot reach? We work at a school for the first part of the build season then move to oRyon Labs for the balance of the season. It will probably mean that the students will get more "exercise" to prepare them for moving the robot on the field.
Quote:
Originally Posted by InFlight
I would advocate only using Aluminum Rivets when possible. Steel rivets are a complete nightmare to remove from aluminum without a really sharp hardened bit.
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We made the mistake of using a whole bunch of 1/4 inch steel rivets on parts of our chassis. We probably could have drilled fewer lightening holes if we had used 3/16 inch aluminum rivets.
