The H-Lift U.S. Type Shoulder Machinery Eye Bolt is a robust lifting point designed for secure angular loading in machinery and heavy equipment applications. Manufactured from forged carbon steel and quenched and tempered for superior strength, this eye bolt features an integral shoulder that rests flush against the mounting surface, significantly reducing bending stress and allowing for safe angular lifts up to 45 degrees. Unlike plain pattern eye bolts which are restricted to vertical pulls, this shoulder-type design ensures reliable performance for complex rigging tasks requiring side-loading capabilities.
H-Lift US Type Shoulder Machinery Eye Bolts are engineered for critical lifting applications where safety and reliability are paramount. Manufactured to meet or exceed ASME B30.26 and ASTM A489 standards, these drop-forged carbon steel eye bolts feature a reinforced shoulder that allows for angular lifting when properly seated.
Unlike plain pattern eye bolts, the Shoulder Type design permits angular (side) loading up to 45° off-axis when the shoulder is fully seated against the load surface.
Forged from high-quality Carbon Steel (quenched and tempered) to ensure superior grain flow, fatigue resistance, and a 5:1 Safety Factor.
Manufactured strictly to ASME B30.26 and ASTM A489 specifications, ensuring consistent performance for critical industrial lifting.
Features a durable Electro-Galvanized finish to protect against rust and corrosion in demanding industrial environments.
Q: What is the difference between a Shoulder Type and a Plain Pattern eye bolt?
A: A Shoulder Type eye bolt has a reinforced shoulder at the base that supports the eye during angular lifts. A Plain Pattern eye bolt lacks this shoulder and is designed strictly for vertical (in-line) lifting only; side loading it can cause bending or failure.
Q: How do I install a machinery eye bolt correctly?
A: The shoulder must be seated flush (100% contact) against the load surface. If the eye is not aligned with the load direction when tightened, use a shim (washer) to adjust it. Ensure the receiving hole depth is at least 1.5x the bolt diameter.
| Item No. | Size | W.L.L. (lbs) | Dimensions (inch) | Weight | Product Code | ||||
|---|---|---|---|---|---|---|---|---|---|
| A | B | D | E | F | kg | ||||
| HK2706 | 1/4" X 1" | 650 | 0.25 | 1 | 0.75 | 2.29 | 0.19 | 0.015 | 706005006 |
| HK2708 | 5/16" X 1-1/8" | 1,200 | 0.31 | 1.13 | 0.88 | 2.74 | 0.25 | 0.028 | 706005008 |
| HK2710 | 3/8" X 1-1/4" | 1,550 | 0.38 | 1.25 | 1 | 3.07 | 0.31 | 0.057 | 706005010 |
| HK2713 | 1/2" X 1-1/2" | 2,600 | 0.5 | 1.5 | 1.19 | 4.45 | 0.38 | 0.113 | 706005013 |
| HK2716 | 5/8" X 1-3/4" | 5,200 | 0.63 | 1.75 | 1.38 | 5.07 | 0.5 | 0.227 | 706005016 |
| HK2719 | 3/4" X 2" | 7,200 | 0.75 | 2 | 1.5 | 5.87 | 0.63 | 0.397 | 706005019 |
| HK2722 | 7/8" X 2-1/4" | 10,600 | 0.88 | 2.25 | 1.75 | 6.66 | 0.75 | 0.681 | 706005022 |
| HK2725 | 1" X 2-1/2" | 13,300 | 1 | 2.5 | 2 | 7.2 | 0.88 | 0.990 | 706005025 |
| HK2732 | 1-1/4" X 3" | 21,000 | 1.25 | 3 | 2.5 | 9.49 | 1 | 1.725 | 706005032 |
| HK2738 | 1-1/2" X 3-1/2" | 24,000 | 1.5 | 3.5 | 3 | 10.48 | 1.25 | 3.177 | 706005038 |
Types, Installation, Safety & Working Load Limits
An eye bolt is a mechanical fastener with a threaded shaft and a loop (eye) at one end. It is designed to be screwed into a structure or equipment to provide a secure lifting point or a tie-down point.
Eye bolts are critical components in rigging operations, allowing wire ropes, shackles, or cables to be attached to loads such as motors, containers, mold plates, and machinery for lifting, tensioning, or securing.
Choosing the correct pattern is crucial for safety. The two most common types are:
Features: Has a "shoulder" or "collar" between the eye and the threaded shank.
Use: Essential for angular lifting (lifting at an angle). The shoulder presses against the mating surface to support the bolt and prevent bending.
Features: No shoulder; the thread transitions directly to the eye.
Use: Designed strictly for vertical lifting only (in line with the bolt axis).
Features: Designed to be passed through a hole and secured with a nut on the other side.
Use: Typically used when there is no pre-tapped hole available, such as through a beam or a post.
Features: Has a coarse lag screw thread and a sharp point.
Use: Designed for screwing into wood or light duty anchors. Not for heavy machinery lifting.
For Machinery Eye Bolts (Shoulder Pattern), the shoulder must sit completely flush and firm against the mating surface. If there is a gap, the bolt is acting as a lever and is significantly weaker.
Lifting at an angle significantly reduces the Working Load Limit (WLL) of an eye bolt. Plain pattern eye bolts must NEVER be used for angular lifts.
When lifting at an angle, you must de-rate the bolt's capacity. Standard carbon steel eye bolts generally follow these guidelines:
| Direction of Pull | Angle (from Vertical) | Remaining Capacity (% of WLL) |
|---|---|---|
| Vertical Pull | 0° | 100% WLL |
| Slight Angle | 1° – 15° | 55% - 80% WLL (Check Mfr Specs) |
| Standard Angular Lift | 16° – 45° | 25% - 30% WLL |
| Extreme Angle | > 45° | NOT RECOMMENDED (Use Swivel Hoist Ring) |
*Note: Always consult the specific manufacturer's load chart, as values can vary by brand and material (e.g., DIN 580 vs. ASTM A489).
