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Special nuts for various parts

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Joe Bonnell05/03/2021 06:00:00
2 forum posts
5 photos

20210305_122152.jpgAfter making most of the bolts needed for the various parts, l had to find some proper nuts. None of the "off the shelf" nuts were what l wanted so l made them. The nuts were turned from bright round steel bar, turned to size and shape, threaded and the hex milled to size on the lathe. I am very pleased with the result. I need to make about 35 to 40 more but l made these over 30 or 40 years ago. Now l have a huge problem, l can't remember how l set them up to machine the hex.

 

 

 

Edited By Joe Bonnell on 05/03/2021 06:05:57

not done it yet05/03/2021 06:35:43
5776 forum posts
20 photos

Two alternatives only? Either you have/had a vertical slide and milled them or you held the nuts in a chuck and faced each side. Not any other options, I think.

PatJ05/03/2021 07:25:50
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132 forum posts
104 photos

I keep hex stock on hand of various sizes, and then just drill it, tap, and part off to the desired length.

Saves a lot of time if you have to make a significant number of fasteners of various sizes.

I make bolts and nuts from this material.

 

rimg_2537.jpg

 

rimg_2585.jpg

 

rimg_2593.jpg

 

Edited By PatJ on 05/03/2021 07:28:51

Frances IoM05/03/2021 08:34:11
1065 forum posts
27 photos
the OP seems to have edited his posting to make the image inaccessible
roy entwistle05/03/2021 11:26:59
1336 forum posts

Frances IoM you can find them in his album

Roy

noel shelley05/03/2021 11:56:49
483 forum posts
14 photos

Hex bar, unless the heads are non standard, Even BA size bar is available,I think still. Drill, tap, part off ! Noel.

ega05/03/2021 12:32:47
2053 forum posts
166 photos
Posted by noel shelley on 05/03/2021 11:56:49:

Hex bar, unless the heads are non standard, Even BA size bar is available,I think still. Drill, tap, part off ! Noel.

And chamfer!

JasonB05/03/2021 12:54:02
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Moderator
20248 forum posts
2207 photos
1 articles

I could not see enough detail of the hex nut in what is left in the album

Clive Foster05/03/2021 14:44:36
2625 forum posts
91 photos

Joe

With an old style flat top lathe bed the easy way is by putting the work in the three jaw chuck and successively inserting a rotation stop between each jaw and the bed to keep the work in the right position whilst the hex is machined.

Adjust the stop length so the chuck jaw is horizontal.

Do three sides of the hex with the stop in front of the spindle and three with it behind.

Clive

Howard Lewis05/03/2021 18:54:17
4662 forum posts
10 photos

If you can't find hexagon bar that gives an exact scale or drawing hexagon size you can still make your nuts as close to drawing as possible. It is not unusual to come across "hybrids".

Renault 5 twin choke carbs were retained by M8 studs, but with 12 mm A/F nuts rather than the 13 mm "norm", because of space considerations, as an instance. And I have mentioned elsewhere Whit form thread fasteners with A/F nuts or hexagons, in "mass production".

So there are precedents for "artistic licence" to use the nearest metric hexagon for a BA thread.

Howard

not done it yet05/03/2021 19:15:51
5776 forum posts
20 photos

Now l have a huge problem, l can't remember how l set them up to machine the hex.

Are you sure you didn’t use hex, all those years ago?

Mick B105/03/2021 21:29:36
1857 forum posts
92 photos
Posted by Joe Bonnell on 05/03/2021 06:00:00:

...

Now l have a huge problem, l can't remember how l set them up to machine the hex.

Edited By Joe Bonnell on 05/03/2021 06:05:57

Do you have a vertical slide with vice, a capscrew and an ordinary hex nut to fit?

JasonB06/03/2021 07:03:49
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Moderator
20248 forum posts
2207 photos
1 articles

Easy way in the lathe is to take a bit of hex stock and either thread a spigot on the end or tap and screw in a bit of studding. Then hold in the toolpost spigot facing away from you and screw your embryo "nut" onto that. Now use a large endmill or flycutter in the lathe to put a flat on the nut, repeat six times by rotating the hex bar in the toolpost.

Same fixture can be used to face the sawn/parted side of the nut in by holding it in the chuck.

This assumes they were just a non standard size, without the photo hard to tell what OP was trying to make.

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