A quick reference sheet showing capabilities can be viewed here.


Custom Open Die Forgings- Domestic & Overseas Shops



Shafts & Spindles, Rings, Discs, Cylinders, Sleeves, Hubs, and More

Capacity allows up to 36,000lbs, 25ft in length, and 50″ in Diameter

In-House Heat Treating & Machining

Small and Large Diameter Bar Stock Available








Maass Rings & Forge Logo

Custom Open Die, Closed Die and Rolled Rings


Rolled Ring Forgings up to 118” Outside Diameter and 26” face height. (Max. weight 8400#).

MRF also offers custom profiled or contoured rolled ring products, such as flange forgings.

Materials: Carbon and alloy, stainless and nickel alloys.

Quality certifications include ISO 9001:2008, API-6A, PED 2014/68/EU (Ann. 1 Sec. 4.3) and NSF -61.


PED Logoiso9001_logoNSF LogoAPI Logo