The life of a bolt in Formula racing - video

**jdurand** · May 18, 2019, 04:24 PM

Originally Posted by Jon

Automatic anchor bolt production line. 8:20 video:

Instead of threading and pinning on a nut, couldn't you just form a head like with a nail...or am missing something

Nail making

**Toolmaker51** · May 19, 2019, 10:14 AM

Originally Posted by jdurand

Instead of threading and pinning on a nut, couldn't you just form a head like with a nail...or am missing something

If I had to guess: These anchors are too long in conventional 4-slide or coldheading machines, not to mention twisting the helix. So large as production line is, maybe screwing a nut on and pinning is a reasonable simplification? Kind of scratching this old noggin here as well.
Now if they were J-bolts, such as that in a slab floor and mud sill, a nut is obvious.