In Memory of




Obituary for Robert S Hahn

OAKHAM- Robert Simpson Hahn,104, passed away at his home in Oakham MA on Jan 5 2021. Robert was born on Nov 1, 1916 in New York City, the son of Clarence W. And Edith S. Hahn. He spent most of his childhood in Flushing & Pomona New York.

He entered an engineering program in 1936 at the University of Cincinnati earning his Doctorate in mechanical engineering in 1944.

In the early 40’s Dr. Hahn took a position with Heald Machine in Northboro where he invented and developed Control Force Grinding. Subsequently he was inducted into many prestigious, global engineering organizations including. CIRP; Paris Fr. and the National Academy of Engineering, Washington DC. He held many patents and is the author of Handbook of Modern Grinding Technology. In the mid-80’s he launched Hahn Engineering in Northboro. In 2000 Dr. Hahn moved his research operation to WPI’s research laboratories where he also became an adjunct professor advising graduate students.

Dr Hahn married Helen Shead and they had three children; Barbara, Robert and David. After his first wife died, he married Kathleen Dillon in 1978 and they settled in Oakham MA, where they enjoyed many outdoor activities including canoeing, hiking, skiing and snowshoeing. Robert has most always had at least 1 horse in his paddock, and in later years started adopting rescue horses. He was well known in the Oakham area and became Oakham’s oldest citizen in 2017 when he was presented with the Boston Post Cane.

He is survived by many grandchildren and great grandchildren, his horse Storm Warning, and many, many friends.

A graveside service was held in Worcester County Memorial Park in Paxton. Arrangements are under the care of Pillsbury Funeral Home 96 S.Barre Rd. Barre. For an online tribute please visit: