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Just a quickie practise.


Part 1

This is how I went about making the swivel key ring shown in the photo above.
It is important to realize this is my way, it is not necessarily the right way, and it is certainly not the only way to make it.
There are many right ways to do the job right.
Shows different lathe operations using just one type of carbine insert tool.

Sit back and enjoy.

This is what I am going to make, No…. the brass bit. not the callipers.
[Image: IMG_0629.jpg]

Here are the materials.
Some stainless steel (free cutting) 14mm dia
Brass hex 12mm
Round brass 14mm dia
[Image: IMG_0533.jpg]

Here are the 3 components that make up the swivel keyring.
Starting at the left the ‘end cap’, ‘swivel’, and the ‘body’
[Image: IMG_0598.jpg]

I started with the hex brass to make the body.
Faced the end.
Notice the brass shim material to protect the brass.
[Image: IMG_0535.jpg]

Then it was chamfered at about 45 deg. I just turned the tool around and fed it in slowly, I also reduced the spindle speed to about 500 rpm.
I didn’t want any chatter marks.
[Image: IMG_0537.jpg]

And this what I ended up with.
[Image: IMG_0539.jpg]

Mmmmm ….. didn’t like the 45 deg chamfer so I changed it to about 30 deg.
Did it again
[Image: IMG_0540.jpg]
[Image: IMG_0542.jpg]

I didn’t want a pointy bit on the end so that went.
[Image: IMG_0545.jpg]

A bit of gentle use of emery cloth (fine).
[Image: IMG_0546.jpg]
[Image: IMG_0549.jpg]

Now we cut it to length
A quick estimate, and mark.
[Image: IMG_0550.jpg]

Cut, that’s the finished body length – roughly.
[Image: IMG_0551.jpg]

A quick rub on some fine emery to get rid of any burs.
[Image: IMG_0553.jpg]

And it’s back to the lathe to machine the other end.
Faced and ready to be spotted.
[Image: IMG_0557.jpg]

A hole was first drilled (6mm dia) then a 10mm dia hole with a 10mm end mill about 6mm deep.
[Image: IMG_0561.jpg]
[Image: IMG_0562.jpg]

So that bit is finished for now and can be taken out of the lathe and put on one side.
Still needs a bit of cleaning up, but I’ll leave that until later on.
[Image: IMG_0599T_1.jpg]

Part 2 to follow.

well dun
Nice thing I can make for my kids. 6820 PopcornPopcornPopcorn

When putting an endmill or slot drill in a drilled hole, I tend to encounter chatter. How did you handle yours?

Hi Wong,

Use a low spindle speed, keep going slower until it stops chattering, a cutting fluid sometimes helps.
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.
[Image: IMG_0598T.jpg]

In to the lathe and faced.
[Image: IMG_0568.jpg]

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.
[Image: IMG_0571.jpg]

Now I am going to put a radius on the end
First cut at 45 deg The cutting edge of the tool
[Image: IMG_0572.jpg]

The next cut is at about 20 deg
[Image: IMG_0573.jpg]

And the final one at about 70 deg
[Image: IMG_0574.jpg]

We end up with this
[Image: IMG_0575.jpg]

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.
[Image: IMG_0577.jpg]

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”
[Image: IMG_0579.jpg]

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.
[Image: IMG_0591.jpg]

Using a small centre drill to start.
[Image: IMG_0594.jpg]

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.
[Image: IMG_0596.jpg]

Now I can cut it to length (roughly), too long because I can trim it to length in the lathe later if needed.
[Image: IMG_0597.jpg]

This is it nearly finished – may have to trim the overall length.
[Image: IMG_0598T.jpg]

Part 3 to follow
Part 3 the final part.

The “end cap,” the part on the left hand side.
[Image: IMG_0598~0.jpg]

Faced and then drilled a 6.1mm dia (in my case) hole. I drilled it about 15mm deep.
[Image: IMG_0583.jpg]

Check to make sure the swivel will go in.
[Image: IMG_0582.jpg]

I turned down the end of the 14mm dia brass to 10mm dia by about 4 mm long.
Chamfering the previously 6.1mm dia drilled hole.
[Image: IMG_0586.jpg]

Checked to make sure the body will go on.
[Image: IMG_0584.jpg]

At this stage you can part it off, or just hacksaw it off, put it back in the lathe to clean up the face. Use a little emery in the hole to get rid of any burrs.
[Image: IMG_0598~0.jpg]

Now we have all 3 parts, time to see if they all fit.
[Image: IMG_0600.jpg]

No not quite – see a small gap
[Image: IMG_0601.jpg]

I reduced the length of the swivel, (faced it off in the lathe) use some brass shim so the part isn’t damaged
There we go fits!
[Image: IMG_0604.jpg]

I used loctite to fix the parts together. The nut allows me to hold the parts together in the vice without touching the swivel. Now you have to be a little careful with the Loctite just use a small amount around the step on the “end cap”
Check to make sure the swivel swivels. If the swivel accidentally gets stuck, well that just means you have a swivel key ring without the swivel – still good as a key ring.
[Image: IMG_0606.jpg]

After the loctite has cured can be put back in the lathe (don’t forget the brass shim) to shape the end.
The top slide / compound slide is set over at about 45 deg. Being careful not to stuff up the swivel.
This is after a few cuts
[Image: IMG_0613.jpg]

After the final cut.
[Image: IMG_0616.jpg]

Clean up with some fine emery cloth
[Image: IMG_0618.jpg]

There it is
[Image: IMG_0622.jpg]

I tend to use wet & dry paper to get a nice finish. Started with 400 finished with 1000.
[Image: IMG_0625.jpg]

Finished on a buffing wheel.
[Image: IMG_0626.jpg]
[Image: IMG_0628.jpg]
[Image: IMG_0629~0.jpg]
[Image: IMG_0634.jpg]

That’s it folks.

Not a single micrometer was hurt or even used in the making of this swivel keyring Smile

Hope you enjoyed it Smile

Hi Dave,

Nice piece of work! Perfect as a gift, especially if the name of the person is engraved on it.

(05-20-2012, 06:59 PM)DaveH Wrote: [ -> ]Not a single micrometer was hurt or even used in the making of this swivel keyring Smile


MK III eyeball? Big Grin Big Grin Big Grin
Nice project Dave, and well documented with scrumptious pictures. Smiley-signs021

Next challenge, make a swivel keyring that has swivels on both ends and that you can detach one end. These are useful for when you take your car to get some work done on it, you can detach the end that has your house keys and give the shop the end with your car key. Smiley-signs003

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