Large forgings done right, down to the millimeter.

Our forging unit produces ring and disc shaped forged blanks for your machine shop. The forged blanks are typically utilized as components in demanding assemblies, such as gearwheels in a transmission. We work in close co-operation with the Finnish transmission industry.

Uncompromising quality.

With expert alloying and open die forging, our customers get the desired strength and properties that they want in their steel. The main advantage of open die forging is that it produces extremely homogenous steel, which is verified after the forging in case of any defects in the crystalline structure of the steel. The test results and material certificates are delivered with the product.

Increased efficiency.

By procuring your forged blanks from Komas, you get the entire service body from one shop. We will buy the materials and take care of the logistics. The net working capital of your production decreases and the use of your company’s resources become more efficient.

How can we help you? Contact us!


  • Rings, discs and die forgings
  • Diameter between 500 mm – 1600 mm
  • Typical weight between 200 kg–5000 kg

Manufacturing methods055-komas-web-srgb-H23A7791

  • Sawing (ø max. 800 mm)
  • Heating (3000 mm x 2200 mm)
  • Open die forging with presses (400 tn – 2000 tn)
  • Heat treatment
  • Machining
  • NDT

We offer through our network

  • Material testing
  • Classifications


  • Case hardening steel 18CrNiMo7-6
  • Tempering steel 42CrMo4
  • structural steel S355J2

Download our machine catalogue here (pdf)


At Komas, we guarantee the high quality of our products and services. Our key production processes have all been throughly documented and checked in accordance to industry leading certification procedures. This rigorous quality approach has been established to maintain consistency and reliability in the production and delivery of our products.

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