I have designed a 3D printed straight one-way manual hand drill several weeks ago. I want to use this mechanism to make other stuff. Now I design this simple egg beater for daily life. It is very powerful if you choose a good egg beater head. Unfortunately, my choice is not so good since this type is not suitable for a large bowl. Change to a small bowl may help. The ball-bearing handle is very good. Combined with a modification of clearance, now the beater or drill is extremely smooth and powerful. Hope it will give you some idea for using this mechanism to make other new stuff.

The handle can be used for the upgraded version hand drill. The drill set of the upgraded version also can be used here.
The f3d file also included in the files.

bolt_support_1 has a heavy manual support layer.
bolt_support_2 has a light manual support layer.
bolt has no support layer
When printing the bolt, it is better to use high fill density.

In case you don't have an egg beater. You can make it yourself as my short video showed. Please check my other video:
https://youtu.be/vr4WaPHmefM

more detailed information on Youtube
https://youtu.be/GNhcLXTxhf0