Flag stop for Festool MFT rail

thingiverse

This is a stop for the Festool MFT/3 rail guide. It features a foldable steel bar, allowing multiple stops to be set up and used on the same rail. The block is assembled with two M6x20 bolts, two M6 nuts, and a washer. The knob was designed using the great nut knob generator: http://www.thingiverse.com/thing:713300, requiring one bolt to have an hex head. It's recommended to use a locknut (with a nylon insert) to secure the steel bar to prevent it from loosening as you fold and unfold it. Additionally, an extra nut can be added just under the knob for easier release of the block when the underside nut doesn't go down by itself. This requires a longer M6x25 bolt. I chose not to 3D print the steel stop due to concerns about its flexibility at the original thickness. Instead, I cut it from an old shutter hinge using a metal saw and then refined it with files and sandpaper to achieve the final dimensions.