Swivel keyring

[DaveH]

Part 2

Making the swivel.
That’s the bit in the middle, I found some 10mm dia stainless (free cutting) so I will be using that, and not the 14mm dia shown above.
It is not very big about .25”dia by .5 long with a 10 mm dia bit on the end.


In to the lathe and faced.


Now I gave it a good rogdering with some emery. This 10mm dia has to go in quite free into that 10mm dia hole in the brass body.
I need to turn a length of about 12mm down to 6mm dia. Now I felt that it was sticking out of the chuck too far, no problem – loosen the chuck push it in – tighten the chuck. We are not working to thou’s so it really doesn’t matter.
Tuned down to 6mm dia.


Now I am going to put a radius on the end
First cut at 45 deg The cutting edge of the tool


The next cut is at about 20 deg


And the final one at about 70 deg


We end up with this


Now attack it with emery cloth to get it round. [You may wish to start with a file – your choice]
After a bit of fine emery.


Take it out of the lathe – this is what I have. Ignore the step on the back – just a piece out of the “scrap bin”


Over to the drilling machine in my case RF 30.
The colour is a bit funny because the camera was set to fluorescent and the illumination was from a halogen lamp.
The vice colour is actually grey!
When dealing with small pieces it is sometimes best to leave it still on the big bit. Makes it easier to hold.


Using a small centre drill to start.


I first drilled the hole (carefully) with 2mm drill
Finished drilling with a 2.5mm drill. A hole large enough to take a “ring” for the keys to fit on.


Now I can cut it to length (roughly), too long because I can trim it to length in the lathe later if needed.


This is it nearly finished – may have to trim the overall length.



Part 3 to follow

DaveH