Transmission components

Ring gears (rolling mill parts)

Major equipment
Ring rolling mill production line
Production capacity
1.2 million/year (4,700 tons/month)
Range of manufacturable sizes
Outer : diameter 150 to 250 mm
Weight : 2.0kg each to 6.0kg each
* Feel free to contact us about the range of manufacturable sizes.


  • Compared with closed die forging, our ring rolling mills offer higher dimensional accuracy, productivity, and material yield.
  • By developing an isothermal normalizing process using forging heat, our processes have been streamlining.
  • The forming line from heating to finishing has been fully automated to ensure consistent quality.


The following benefits of rolling milled parts are observed when compared with pressed parts.

[Comparison with pressed parts (in house)]

  • Material yield improved 16%
  • Productivity improved 80%
  • Heat treatment costs reduced 50%
Product inquiries

Phone Aichi Steel Corporation
Sales and Planning Division

TEL +81 (52) 603-9362

Internet Click here to make an inquiry about our products online

Product inquiries form

* Please understand that we may not be able to accept specific orders depending on the circumstances even for information given on this website. Feel free to contact us for the latest information.
Note that information given on this website is subject to change without notice.