Eye bolt rating

[whateg0]

I can find info on forged lifting eyes but am not finding much of anything on the common hardware store variety. I have a couple of 1000# laser cutters to move one time and was going to weld up a cradle to go under them. Easiest thought was a pair of 2" square tubes under the ends with eye bolts at each corner. Spreaders at the top to keep the chain or lifting straps from crushing the top. Next easiest would be to just cut some lifting eyes and weld them on the ends of the tube. This move has to be accomplished this week and the organization didn't put much thought into how they were going to accomplish it.

Dave

[whateg0]

Additional thoughts are each corner should only 250#, plus whatever weight isn't distributed evenly. 3/8" eyes should be plenty. I could even use larger ones. These are the type I'm thinking of.

Dave

[LIALLEGHENY]

check out Mcmaster for the eyebolts. They have the ratings on them.

The ones you have pictured are not for lifting.

[LIALLEGHENY]

If you had no other choice I'm sure you could get away with using them, maybe go to 1/2" just to play it safe.....nothing worse than dropping a machine, especially on yourself.

[whateg0]

I just passed over at gj about one of my engine hoists failing this past week. Considerably more weight but still noteworthy. I'll duplicate that post here.

[whateg0]

check out Mcmaster for the eyebolts. They have the ratings on them.

The ones you have pictured are not for lifting.

In the time frame given, it's going to be either very expensive or not possible to get lift rated eyebolts. Yes, it's a risk, but anything is. Mostly, it's a liability thing for the manufacturer. I have a 1/2" eyebolt like the one shown in the tire swing in the front yard. I'm more worried about the 6" branch it hangs from breaking than I am about the eyebolt bending. I just want to go above the normal TLAR specs.

Dave

[Magicniner]

Can't be bothered with rated components and using components in applications they are not designed for again?
This is a steep learning curve isn't it?

[John Hasler]

Weld those eyebolts closed, don't lift overhead, and you'll be fine.

[STRR]

NEVER use bent fabricated eye bolts for hoisting. They have no ratings on them for a reason. They are not designed to hoist loads.

Use ONLY forged or cast shouldered eye bolts for hoisting. Be SAFE. Shouldered eye bolts are designed for up to a 45-degree rigging angle. The closer you can get/keep the angle straight up (90-degrees) the better off you will be.

[Glenn Brooks]

Surprised no has mentioned this: hardware variety eye bolts have no safety rating because they bend and straighten out when subject to lifting loads. The metal in the eye is generally grade 2 or less- sometimes more plyable than zinc coated carriage bolts.

If you weld the eye you might get away with a 1000#, but use very low heat, as the welding I tried just evaporated the metal - it’s really cheap stuff- just eye candy for cross tying loads on the back of a pickup with cheap truckers rope. Or hanging planter baskets in the yard...

Glenn

[whateg0]

Keep in mind that each corner is only about 250#

[Steggy]

Additional thoughts are each corner should only 250#, plus whatever weight isn't distributed evenly. 3/8" eyes should be plenty. I could even use larger ones. These are the type I'm thinking of.

Screenshot_20200316-115358_Chrome.jpg

Dave

Those things are not rated for lifting or supporting loads. There's a reason forged (one piece) lifting eyes exist. Use of a hardware store eye opens the door to the eye spreading under dynamic conditions...and down goes your load.

Keep in mind that each corner is only about 250#

It doesn't work that way, my friend. That's a static condition, which is never achieved in practice. If you plan on 250 pounds per "corner" I can guarantee you your machine will end up in a heap on the floor.