Slingmax Onyx Roundsling: High-Performance 100% HMPE Lifting Sling
Elko Wire Rope’s ONYX Roundsling by Slingmax is built for demanding lifts where strength, safety, and precision matter most. Featuring a 100% HMPE (High Modulus Polyethylene) O-Spec core, this advanced roundsling delivers exceptional capacity while weighing less than half of a polyester sling with the same rating. The lightweight design makes handling faster and safer, while rigorous quality controls ensure unmatched performance for construction, offshore, industrial, and heavy equipment lifting.
Category > SlingMax
Onyx
Elko Wire Rope’s ONYX Roundsling by Slingmax is built for demanding lifts where strength, safety, and precision matter most. Featuring a 100% HMPE (High Modulus Polyethylene) O-Spec core, this advanced roundsling delivers exceptional capacity while weighing less than half of a polyester sling with the same rating. The lightweight design makes handling faster and safer, while rigorous quality controls ensure unmatched performance for construction, offshore, industrial, and heavy equipment lifting.
Product Overview
- 1. High-Performance Sling Design
- 2. Advanced O-Spec HMPE Core and Safety Cover
- 3. Versatile Applications Across Industries
- 4. Key Performance Advantages
- 5. Safety, Inspection & Maintenance
- 6. Why Choose Elko Wire Rope for ONYX Roundslings?
- Ultra-Light Handling – Less than half the weight of comparable polyester roundslings, reducing operator fatigue and improving jobsite efficiency.
- Precision Length Tolerances – Manufactured on the Slingmax Roundsling machine under the Slingmax Quality System, achieving unmatched ±1 inch accuracy compared to standard slings.
- Low Stretch Core – O-Spec HMPE yarn delivers less than 1% stretch at rated load for stable, predictable lifts.
- O-Spec Core Yarn – Made from high-performance HMPE fiber, twisted and batch-tested in Slingmax’s Greensboro, NC facility to ensure consistent strength.
- Dual-Layer Protective Jacket – Black outer cover with a red inner layer that acts as a clear retirement indicator if damaged.
- Weather & Chemical Resistance – Maintains integrity in harsh conditions, including UV exposure, saltwater, and most industrial chemicals.
The ONYX Roundsling is trusted in multiple sectors, including:
- Construction & Steel Erection – Hoisting beams, panels, and prefabricated components.
- Offshore & Marine – Lifting gear and cargo in saltwater environments.
- Wind Energy – Installing and servicing turbine blades and towers.
- Heavy Equipment Rigging – Safely moving large machinery and plant components.
- Industrial Manufacturing – Supporting plant maintenance and production lifts.
- High Strength-to-Weight Ratio – Lifts massive loads while remaining lightweight and easy to handle.
- Tested for Reliability – Every ONYX Roundsling capacity is proof-tested on Slingmax’s 1.2 million-pound pull-test machine, verified to meet ASME B30.9 standards.
- Consistent Accuracy – Tight length tolerances provide reliable performance in multi-sling lifts.
- Durability in Harsh Environments – Designed to perform in extreme temperatures, wet conditions, and abrasive settings.
For long service life and safe lifting:
- Inspect Before Every Lift – Check for cuts, abrasion, or exposed red warning layer.
- Follow WLL Ratings – Never exceed the rated Working Load Limit on the tag.
- Protect from Sharp Edges – Use edge guards to prevent sling damage.
- Store Correctly – Keep dry, clean, and out of prolonged sunlight or chemical exposure.
- Certified Quality – Every ONYX Roundsling we supply meets or exceeds industry safety standards.
- Expert Support – Our rigging specialists help select the right sling for your load and lifting method.
- Proven in the Field – Trusted by industries that require maximum safety and precision.
- Quick Supply – Stocked for fast delivery to keep your projects moving.
Short Description:
O-Spec Core Yarn is produced with high performance HMPE fiber. Twisting and batch testing is performed in our Greensboro, NC facility.
Discover Product Features:
O-SPEC CORE YARN
O-Spec Core Yarn is produced with high performance HMPE fiber. Twisting and batch testing is performed in our Greensboro, NC facility.
LIGHT WEIGHT
ONYX slings are less than half the weight of polyester roundslings of equal capacity.
EXTENSIVELY TESTED
Every capacity ONYX roundsling has been tested on our 1.2 million pound pull-test machine. Verified to meet ASME B30.9 standard.
LENGTH TOLERANCE
Manufactured on the Slingmax Roundsling machine, using the Slingmax Quality System, ONYX is able to achieve unmatched length tolerances compared to competition.
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