Erhart Foundry

Erhart Foundry is one of the last remaining sand cast iron foundries remaining in Cincinnati, Ohio. It has been a prominent foundry in Ohio - Indiana regions since 1825 and can be placed on a map in Cincinnati since the early 1900s. It is currently under its sixth generation owner, Zack Erhart. Erhart Foundry started off making parts for steam engines and locomotives including train tracks. A lot of Sewer covers in Cincinnati were made at this Foundry as well and are actually embossed wither name Currently, Erhart Foundry produces small to medium size batches of iron castings for a variety
of clients. Still residing in the same building they were in the 1900s, this foundry has done a phenomenal job bringing itself into the current industrial age while retaining the old time Cincinnati industrial feel. Erhart Foundry does a lot of work for local Cincinnati companies and local plants of national and international companies. They do a lot to help with metal recycling and creating a sustainable foundry environment. They recycle a lot of old track and train parts along with any other iron scraps and have a 97% retention of the sand they use for their molds. They use electric heaters instead of coal and run a computerized test to ensure best iron quality ensuring clean and quality cast iron parts with every pour.

Erhart has been a family run sand cast iron foundry since its conception and is now currently headed by Zach Erhart, the sixth generation owner.


The sand cast iron process is a tedious one. It requires attention to detail, especially at Erhart, where almost everything is done manually.

Erhart outlived other foundries to be the oldest foundry still in business, because they analyze how their products are made and take into account extra vents, additional geometry and casting concerns upfront and charge accordingly. They think about the job in advance and plan well.

Sand casting iron involves many different tasks and each of those is integral to achieving a good cast. The tasks are divided into pre-process, the pour, and the post processing. Pre-process tasks include pattern making, sand mold generation, venting and pattern removal. Post process tasks include breaking the mold, shot blasting, grinding and finishing.