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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.
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Leading Manufacturers

Freeport, IL  |  815-233-3833

Anchor Harvey is a one-stop, fully-integrated aluminum forge shop with in-house engineering to assist our customers bring their products to market faster. We’ve been producing dependable products since 1923, and we serve industries including aerospace, medical devices, recreational vehicles, and heavy equipment. When you choose Anchor Harvey, you choose dependability, competitive pricing, and the shortest lead time in our industry.

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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.

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Anderson Shumaker Company $$$

McKees Rocks, PA  |  800-223-2818

McKees Rocks Forgings is a producer of forged circular products. Our high quality items are suitable for use in many industrial applications. We specialize in crane wheels, industrial wheels, sheave wheels and gear blanks. Custom products are available and we are able to meet any standard forging specs as well as many other closed-die circular forging projects. A range of materials is available.

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McKees Rocks Forgings, Inc. $$$

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.

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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 $$$

Cincinnati, OH  |  888-321-7200

For over a century, we have manufactured metal component parts for OEMs utilizing the forging process for strength and integrity. We offer forgings of carbon, alloy, stainless and tool steels, aluminum, high-temperature and specialty metals. We provide hammer, press and upset forging.

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Queen City Forging Company $$$
placeholder image Anchor Harvey Anderson Shumaker Company McKees Rocks Forgings, Inc. Ferralloy Inc. Ken Forging Queen City Forging Company

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