M10 to M16: Understanding the Different Sizes of RUD Eye Bolts and Their Uses

Eye bolts are simple lifting points with threaded shanks and looped heads, which are used with heavy-duty machinery in industrial facilities. They are designed to secure loads, rig equipment, and create anchor points, ensuring smooth operations and safety. RUD India, a leading manufacturer of lifting equipment, offers a diverse range of lifting eye bolts, catering to varied requirements. Here's a concise guide on the different sizes of RUD India eye bolts, from M10 to M16, exploring their specific applications and guiding you towards the optimal choice for your needs. It includes an eye bolt size chart and notes on the DIN 580 standard.

Key takeaways

• M10, M12 and M16 refer to the thread diameter in millimetres. A larger thread carries a higher load, but only when the pull is straight along the shank.
• Standard eye bolts are rated for a vertical pull. Angled or side loads reduce the working load limit (WLL) sharply.
• Vertical WLL of standard DIN 580 eye bolts: M10 about 230 kg, M12 about 340 kg, M16 about 700 kg.
• For angled lifts, use a swivel eye bolt or load ring rated for the load direction, not a standard eye bolt.
• Never exceed the WLL, seat the collar fully on a flat surface, and inspect the bolt before every lift.

Understanding Eye Bolt Sizes

Eye bolt sizes are denoted by an "M" followed by a number, indicating the nominal diameter of the threaded shank in millimeters. An M16 eye bolt has a 16 mm thread. RUD's offerings span M10 to M16, each size suited for specific load capacities and applications. Size also depends on the thread length under the collar and the eye dimensions, which vary by standard and manufacturer, so always check the full dimension sheet and not only the thread size.

Eye bolt uses: lifting machinery, dies and fabricated parts, rigging, and creating anchor and tie-down points for cables, chains and ropes in construction, fabrication and transport. Eye bolts used for lifting must be rated and marked for lifting. Do not lift with hardware sold for decoration or light fixing.

Eye Bolt Size Chart (M10 to M16)

Figures are for a standard DIN 580 eye bolt with a pull along the shank axis. WLL is the maximum load the bolt may carry in normal service. Angled pulls reduce the WLL significantly, so check the manufacturer's angular load table or use a swivel eye bolt or load ring. For RUD product ratings, see the RUD lifting points range.

M10 Eye Bolts

• Size: 10 mm diameter shank
• Applications: Suited to lighter lifting and tie-down tasks in workshops, fabrication and general construction. Typical uses include lifting small machine parts, fixtures and dies, and creating anchor points for cables, chains and ropes in temporary setups.
• Working Load Limit: About 230 kg for a standard DIN 580 bolt with a vertical pull. See the size chart above.

M12 Eye Bolts

• Size: 12 mm diameter shank
• Applications: These workhorses find their place in construction, metal fabrication, and industrial settings. They handle moderate loads, secure cables, and create reliable tie-down points. For example, lifting medium machine components, anchoring safety lines during construction, or securing cables for a temporary event stage.
• Working Load Limit: About 340 kg for a standard DIN 580 bolt with a vertical pull. Choose based on your actual load, the lift angle and the bolt's marking.

M16 Eye Bolts

• Size: 16 mm diameter shank
• Applications: Heavy duty eye bolts designed to tackle heavier loads in construction, engineering, and rigging. They are used for lifting machinery components, securing heavy parts, and creating anchor points for lifting equipment. For example, lifting heavy components in a manufacturing plant or creating secure tie-down points for oversized cargo.
• Working Load Limit: About 700 kg for a standard DIN 580 bolt with a vertical pull. For heavier or angled lifts, consider a load ring or lifting point rated for the load.

Eye Bolt Standards: DIN 580 and DIN 582

DIN 580 covers forged eye bolts for lifting, and DIN 582 covers eye nuts. International standard ISO 3266 covers forged steel eye bolts as well. A bolt that meets a standard has defined dimensions and a marked WLL, so you can compare products from different suppliers. Check the marking on the bolt for the manufacturer, the thread size and the WLL before use.

Also, Read: Lifting Point Maintenance Guide

Types of Eye Bolts

Eye bolts don't just come in different sizes but also different types, and the type decides how the load may be applied.

• Standard (DIN 580) eye bolts: Forged, with a collar. Rated for a straight, vertical pull.
• Lifting eye bolts: The standard type of eye bolts used to lift objects and materials.
• Eye nuts (DIN 582): The same idea with an internal thread, used where a bolt passes through the load.
• Swivel eye bolts, hoist rings and load rings: The eye rotates, so the bolt can take pulls from different directions without twisting the thread. Choose these when the load direction changes. See RUD's load ring.
• Shoulder (collar) eye bolts: A wide collar lets the bolt seat flat on the load and carry angled pulls within its rating.

People sometimes search for "I bolt" when they mean an eye bolt. If you are unsure which product you need, confirm the standard and WLL with your supplier.

Other considerations before purchasing eye bolts

While size is a crucial factor, choosing the right RUD eye bolt requires looking beyond just the millimeter diameter. Here are some additional aspects to consider:

• Material: RUD offers galvanized steel, stainless steel, and high-strength alloy options. Galvanized steel provides good corrosion resistance for outdoor use, while stainless steel excels in marine environments or areas with high humidity. High-strength alloys offer exceptional strength for demanding applications. Consider the working environment and potential corrosive elements when making your choice.
• Thread Length: The threaded shank's length determines its grip depth into the anchor material. Select a length that ensures sufficient thread engagement based on the base material's thickness and the required strength. For instance, a thicker concrete slab might require a longer thread compared to a wooden beam.
• Eye Type: RUD offers open eyes, welded eyes, and captive eyes. Open eyes provide flexibility for attaching shackles or hooks, while welded and captive eyes offer a more secure, tamper-proof connection. Opt for open eyes if frequent attachment changes are needed, and welded/captive eyes for permanent or high-security installations.

Also, Read: Tips for Handling Heavy Loads With Lifting Equipment

How to Choose the Right Eye Bolt

1. Find the weight of the load and add an allowance for slings, hooks and shock loads.
2. Decide the direction of the lift: vertical, angled or changing.
3. Choose the type: standard for vertical pull, swivel or load ring for angled pull.
4. Pick the size from the chart so the WLL at your angle is above the load.
5. Check the thread, its length and the surface the collar sits on.
6. Confirm the standard, marking and certificate with the supplier.

If you are unsure, contact RUD India with the load, the angle and the base material.

Safety First

Always prioritize safety when using lifting equipment. Remember:

• Never exceed the Working Load Limit of the eye bolt.
• Choose the appropriate material based on the working environment.
• Ensure proper thread engagement with the anchor material.
• Inspect eyebolts regularly for wear and damage.
• Follow industry safety regulations and guidelines.

RUD eye bolts, available in sizes M10 to M16, cater to diverse lifting needs. By understanding the size implications, considering material, thread length, and eye type, and prioritizing safety, you can select the most suitable option for your application. Remember, the right eye bolt ensures efficient operations and, most importantly, safety for everyone involved.