Seamless Rolled Rings

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The outside dimensions of seamless rolled rings can range from a few inches to 30 feet, height can reach from less than an inch to higher than 9 feet, and weight can be as much as 350,000 pounds. The shape of seamless rolled rings can be configured to be flatter, like a washer, or to have high walls like a hollow cylinder. Read More…

Seamless Rolled Rings Seamless rolled rings are forgings formed from a single "donut"-shaped block of metal by the application of horizontal and vertical pressure. Seamless ring-rolling is a unique type of metal forging that produces seamless metal rings with great tensile strength and structural integrity. Seamless rings may be forged into a wide range of dimensions, from small bearing housings to wind turbine slewing rings.

Leading Manufacturers

Freeport, IL  |  815-233-3833

Anchor Harvey is a data-driven aluminum forging company with a century-long legacy in precision manufacturing, engineering, and supply chain management. We serve all industries in need of precision aluminum forgings, with an expert focus on aerospace, medical devices, recreational vehicles, and heavy equipment. Our process is designed to help our customers bring better final applications to market faster. Because at Anchor Harvey, it’s not what we make, it’s what we make possible.

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Anchor Harvey $$$

Chicago, IL  |  800-932-0357

Although we have over 100 years of experience, we are committed to continually expanding our offerings in all industries. We are not content to remain as we are, but we continually work to improve our products and processes each and every day. We will work with you to create the ultimate products for your needs. Find out more on our website, or you can give us a call today!

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Anderson Shumaker Company $$$

Ronkonkoma, NY  |  800-900-9209

Alloys International is a worldwide supplier of alloy, aluminum, carbon steel, nickel, stainless steel, titanium and alloy steel forgings for the aerospace, petrochemical, nuclear, electrical and medical industries. We offer open, closed-die, rotary and isothermal techniques.

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Alloys International $$$

Cleveland, OH  |  440-250-1900

For over 30 years, we have provided metal forged products for a wide variety of industries, including the aerospace, military, food service, medical, and automotive industries. Our customers know they can trust our forgings for quality and affordability. We will never try to make you pay more than you should for our products. Contact us by phone or email to find out more!

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Ferralloy Inc. $$$

Jefferson, OH  |  888-536-3674

Here at Ken Forging we are a family-owned business who offers our customers high quality forgings. We require no minimum orders and our forgings come in a variety of materials including: stainless steel, carbon steel and more. We provide outstanding technical support and our teams are here to meet your needs by providing same day shipping. You can trust the experts at Ken Forging. Contact us today for more information!

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Ken Forging $$$

Chicago, IL  |  708-458-1582

Cornell Forge is a leading custom designer/manufacturer of alloy, carbon, titanium, stainless steel and alloy steel forgings. We provide high-quality forgings at competitive prices as well as shop flexibility and innovative scheduling techniques. For more information, please call today!

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Cornell Forge Company $$$

Charlotte, NC  |  704-843-9292

CSI provides custom-crafted solutions for industries such as bearings manufacturers, gears manufacturers, sprockets manufacturers, stamping manufacturers and more. Component Sourcing International has been the one stop shop for international manufacturing of kitting, machined castings, bearings, and much more for over 30 years. Contact us today!

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Component Sourcing International $$$
placeholder image Anchor Harvey Anderson Shumaker Company Alloys International Ferralloy Inc. Ken Forging Cornell Forge Company Component Sourcing International

Unlike other types of ring forming, this forging process creates a seamless ring with great integral strength, capable of resisting high degrees of internal or external pressure. This is why wheel hubs, bearing housings, pressure vessels, gears, jet engine bearings, engine turbines and wind turbines - all applications which apply significant force - are usually made from seamless forged rings.

Seamless rolled rings are also utilized in nuclear reactors, off-road equipment, couplings, rotor spacers, sealed discs and cases, flanges, valve bodies and many other high stress applications.

A seamless rolled ring begins as a solid, circular block of metal that is heated to forging temperatures and then punched through the center to form a "donut" shape. This preform is then placed on a rolling rig with a roller touching the inside of the donut and a roller touching the outside of the donut. The two rollers begin to rotate in opposite directions, turning the ring, and at the same time the rollers slowly squeeze inwards, thinning the ring wall and causing the diameter of the ring to increase.

Some ring-rolling machines also have a roller that presses down on top of the ring as it turns, governing the height of the ring wall. The process continues until the ring has been thinned, flattened or otherwise shaped to its desired dimensions, at which point it may receive secondary processing such as size fine-tuning or heat treatment. Rings can be shaped at high forging temperatures for faster forging or, for rings that require the highest pressure resistance, such as aluminum car wheels, the rolling can be done at lower temperatures over a longer period.

Lower forging temperatures and longer forging times result in greater tensile strength. The ring-rolling process can be modified in any number of ways to produce a wide range of precise contours both on the inner dimension and outer dimension. Seamless rolled rings are unequaled in tangential strength, ductility, and adaptability.

Seamless Rolled Rings Informational Video