NSD 2005 Oil Seal 1.5

This is my own design for an oil seal replacement.

It's not perfect, as the edges are a little faceted. Although I actually don't mind that myself as it appears more 'machine made' which I think suits a Dalek's appearance.

It incorporates an inner lip, in order to centrally locate your hemisphere. There is also a central part, which has a hole and a hexagon recess for a standard M6 head head bolt. This is to eliminate the requirement for MDF discs or other mounting methods to be stuck inside the hemis.

The idea is, but an M6 bolt through the hole (which is a tight fit to stop it dropping out.. tap it in if need be).

Then put a bead of black silicone in the recess of the oil seal and push the hemi into it. You can silicone inside as well, as there is access to do so.

The central supports are a ribbed structure, to stop the oil seal being able to be pulled away from the skirt easily.

Although the central recess will lock the M6 bolt in place, bear in mind it's still plastic so it will easily break if you put too much torque on the nuts you use to hold the oil seal on with. Best not to use lock nuts, but use normal nuts with spring washers, and some loctite. Nip them up, but don't over tighten them.

Would love some feedback, as this is my first design for a 3D printed Dalek part.