towbar bicycle holder

My bicycle holder hang constant at a tiny nail. one time the bicycle holder almost drops down when i was replace the bicycle holder. So i decide to make a nice fitted one.

This is normally the standard size for a tow bar on a car. I make it a little bit smaller so that the bicycle holder nice fit. The streght of the part comes by the steel M8 thread that is inside the hanger. You need to have one anchor bolt like you see on the picture, or you can make with some chemical anchor a normal steel thread in to the wall.

To mount this place the thread in the wall and fix them with a washer and a M8 nut. Than you put also a m8 nut in to the hanger. This is a nice fit and you maybe need to put the m8 nut with a other bolt and screw the nut in to place. after that it is just screwing the hanger in place.

the part that is on the wall have a hole for the wall nut. So i make a very big fillet to go from the big hole to the small hole. Normally if your printer is do some nice overhangs you don't need any support. A small lose thread is no problem because you don't see this part normally.