Loose Bock Nibs?

[Ambien]

Hello,

 

I've been browsing AliExpress, and I noticed some shops sell what seem to be custom engraved cat bock nibs but they don't come with any housing so I'm wondering how would I use them other than buying a full bock unit and removing its default one as a donor?

 

Cat nibs

 

Also, would it be possible for me to buy X fountain pen and then manually swap the old and new nibs with each other? I'm on the fence since the nib itself would be $20 and I'd need to buy the base FP for it to be swapped into it later. Then if you have any recommendations for pens that would be compatible with this nib would be great too. 

[A Smug Dill]

1 hour ago, Ambien said:

I'm wondering how would I use them other than buying a full bock unit and removing its default one as a donor?

 

‘Open’ nibs of that general technical design (i.e. shaped with wider shoulders than the root, with the metal curving smoothly around a largely cylindrical feed, and to be used with >50% of the nib's length exposed at the front end) are all ultimately friction-fit into where it and the supporting feed are housed; and that may or may not be a threaded nib unit that can be detached from the grip section.

 

There are a number of factors which would determine how perfect or fit is, including the (most obvious one being) the diameter of the feed; the curvature, width, length, and thickness of the nib root; and (often overlooked) whether there is enough headroom in the pen cap. None of those strictly limits a Bock nib to go only where another Bock nib has been originally installed. You could quite possibly shove a Bock type 250 nib into a Wing Sung 699 or Majohn T5, neither of which use any sort of removable nib unit, and make the pen write.

 

2 hours ago, Ambien said:

Also, would it be possible for me to buy X fountain pen and then manually swap the old and new nibs with each other?

 

Sure, if the fit is correct (or close enough).