Tap and Die Kits

[durangod]

Hi, does anyone here know anything about tap and die kits.

Preface: It appears one of the galvanized L anchor bolts i used for my hoist is too short to get a grip on (front left). The bolts are rated for 60 foot pounds and i am only using 30 which i believe is enough. But this one bolt being too short i cant get even 5 foot pounds of grip on before it begins to fail (i can feel it), so i backed off to not make it worse, the last thing i need to do is to strip it totally. Right now its just finger tight.

So i feel i have a few options here:

1. put it as tight as i can get it and weld the nut in place.
2. drill a new hole beside it and use a tap in (wedge type) anchor bolt.
3. drill out the bolt enough to use a wedge type bolt in its place.
4. cut a section of threads off another bolt and weld it to this one extending it, then grind it and use a die to restore the threads.

My preferences in order are 4, 1, 2, 3

However what i know about tap and die sets and thread pitches is minimal.

It says on the web page from the store i purchased the bolts from that the thread pitch is 13 and the bolts are 1/2 inch x 6 inch long

https://www.lowes.com/pd/Hillman-1-2-in-x-6-in-Galvanized-Exterior-Anchor-Bolt/1000581421

So i found a standard SAE tap and die at the same store, but it does not tell me which sizes it has (so stupid)

https://www.lowes.com/pd/VEVOR-40-Piece-Metric-Tap-and-Die-Set/5015059925

So i looked at the MFG website and they do detail the sizes.

https://www.vevor.com/tap-die-set-c...e-accessories-and-storage-case-p_010464490781

Now that detail shows that it has size 1/2-13NC which i believe is what i need, it sounds logical.

I have been meaning to get a tap and die set for a long time anyway so i might as well get the set if has the size i need. I plan to get a metric set later. I have never done this before so this is all new to me.

Do you agree with my order of preference for fixing this and is this the set with the right size?

Thanks

 

[urumomo]

I'm not sure I understand exactly what you're saying .
That one anchor bolt is loose in the concrete ? Or the nut is only engaging a single thread ?
remove the washer .

Is that the side that will be in compression ?
the side toward the load ?
If so , you probably don't even need it if all those other anchors are solid

 

[durangod]

Sorry, the anchor itself is solid, the nut is only engaging a few threads which is the issue. I read that i need at least the full nut + of engagement in order to hold properly.

Even if i remove the washer its not enough, at first i tried a thinner washer then removed it and still not enough.

The load will be on all sides as i will be lifting a boat motor (400+ lbs) from the right and swinging it around to the far left to set it down on a pallet.

I was planning on welding one of the nuts on there anyway to keep someone from stealing the lift, so maybe i can just get it snug and weld it and that would be enough.

 

[urumomo]

You could just weld it as is .
no washer , twist the nut on " tight " and hit with a bead across the nut and into the base

 

[durangod]

You could just weld it as is .
no washer , twist the nut on " tight " and hit with a bead across the nut and into the base

Thanks cool that would also keep anyone from stealing the lift. I would like to leave the washer as i dont want to mar the protective finish on there and introduce rust.

 

[urumomo]

There is probably a chart somewhere on the internet ,
but I'm guessing a single thread of engagement with a 1/2-13 is good for waaaaay more than that will ever see .

Hit it with that cold galvanizing spray afterwards

 

[durangod]

There is probably a chart somewhere on the internet ,
but I'm guessing a single thread of engagement with a 1/2-13 is good for waaaaay more than that will ever see .

Hit it with that cold galvanizing spray afterwards

I will yeah those threads are pretty meaty. I will also be careful not to breathe the fumes, i have a fan i can use to blow on it while i weld it. I will have to remove the galvanized for welding so yeah i will spray it again afterwards. Thanks