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What is Seamless Rolled Ring Forging?


  • No minimum order quantities
  • Up to 252" maximum O.D. and Up to 49" maximum face height
  • Rolled ring weights to 60,000 lbs., open die weights to 300,000 lbs.
  • Downstream processing such as heat treatment, testing, machining, segmenting, parting or splitting can all be performed in-house
  • Guaranteed delivery programs

At Scot Forge, we produce seamless rolled rings using an open die forging method or our ring rolling mill. Forged seamless rings are incredibly durable and reliable because they have inherent, circumferential grain structures and no weldments, eliminating weak points. Our seamless ring rolling mill is also a more cost-effective forging process than other methods because less starting stock is required to manufacture the ring. As a result, there is less material to machine away from the end product; another added benefit. When combined with a ring expander, ring rolling generates exceptionally round and durable ring products in any forgeable material.

Seamless Ring Rolling Process

The seamless rolled ring forging process starts with heating a pre-cut billet, then the malleable metal is placed on a hammer or press. The ring shape begins with a centerpiece "snapped" from the pre-form to produce a hollow center, similar to a donut, and moved to the ring mill.  Once on the ring mill, the center of the part supported by a mandril and rollers apply pressure from different angles to gradually expand the ring.  Rings made on a press are placed on a pin, supported by a saddle, then rotated as force is applied to expand the opening. Both techniques create circumferential grain flow creating the desired dimensions of the forged ring.

This is our high-tonnage Wagner ring mill and ring stretcher in action! The Wagner allows us to produce:

  • Straight rolled rings
  • Contoured rolled rings

The additional processing on our custom-engineered ring stretcher/sizer helps to minimize stock allowances, improve concentricity and cold-work aluminum rings.

Did you know?

Scot Forge coupled with our joint venture, Ringmasters,  offers deliveries in as little as 5 business days. Allowing us to offer a speed-to-market solution that boasts a success rate of over 95% with a perceived quality of 99%.

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Scot Forge Difference

At Scot Forge, we know the importance of getting your parts on time, as expected. However, for customers new to procuring forgings, ordering a forging that will meet all specifications for end-use applications may be challenging, so finding a trusted supplier and partner is essential. Our employee-owners are here to ensure your project stays on track with our forgings by offering:

Pro Tip - Did you know near-net shapes can save you time and money? Oftentimes, a customer calls to order a disc, which they will later machine down to a more shaped part. By working with our technically trained sales team, you can get your finished product shape as close as possible to optimize your production process. 

We can help you today!

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