Sep 06, 2020 · Cincinnati 10" x 24" Universal Hydraulic Grinding Machine. I recently bought this machine, and took delivery this week. It's from 1954, serial# 4U2B5B-39, model ER. I had been looking hard at three cylindrical type grinders. One of which was a Norton 10x20. I began asking questions about it in the "abrasive machining" category of these forums, resurrecting this old thread: