Mechanical Properties for Shackles
Important:
Mechanical properties apply to carbon and alloy steel only.
Working load limits are the maximum combined static and dynamic load in pounds that shall be applied in direct tension to an undamaged straight length of chain.
Any variation such as angular lifts, shock loads, and modifications to the shackle will result in a substantially reduced working load limit.
Working load limits are based on a safety factor of 5 to 1.
 |
|||
| Diameter | Working Load Limit (lbs) |
Proof Load Min (lbs) |
Breaking Load Min (lbs) |
|---|---|---|---|
| 3/16" | 650 | 1,430 | 3,250 |
| 1/4" | 1,000 | 2,200 | 5,000 |
| 5/16" | 1,500 | 1,300 | 7,500 |
| 3/8" | 2,000 | 4,400 | 10,000 |
| 7/16" | 3,000 | 6,600 | 15,000 |
| 1/2" | 4,000 | 8,800 | 20,000 |
| 5/8" | 6,500 | 14,300 | 32,500 |
| 3/4" | 9,500 | 20,900 | 47,500 |
| 7/8" | 13,000 | 28,600 | 65,000 |
| 1" | 17,000 | 37,400 | 85,000 |
| 1-1/8" | 19,000 | 41,800 | 95,000 |
| 1-1/4" | 24,000 | 52,800 | 120,000 |
| 1-3/8" | 27,000 | 59,400 | 135,000 |
| 1-1/2" | 34,000 | 74,800 | 170,000 |
|
* Proof Load is an axial tensile load which the product must withstand without evidence of any permanent set. |
|||