Broadway Machine traces its roots to 1910 when the Sword family started the shop at 710 N. Broadway in the heart of Automobile Alley in Oklahoma City. Originally it was a general machine shop that performed any number of metal-working activities. Mr. Sword ran the shop until his passing in the early 1940's. Howard Mullins, formerly the shop foreman, continued to run the shop for Mrs. Sword for several years until she sold it to the Mullins family. 

During World War II, Broadway Machine was designated a small war plant and did extensive work for what would become the Tinker and Norman Air Force Bases. The Mullins, Howard running the shop and his wife Dora running the office, made an excellent team and successfully grew their operation. So much so that in 1945 they moved down the street and around the corner to the shop's current location at 29 NE 8th St.

Howard continued to run the operation until he passed away in 1958 at which point Dora's nephew, Merlin Russell took over as General Manager. In subsequent years Broadway Machine was transformed into a specialty shop for rebuilding the major components (cylinder heads, blocks, crankshafts, connecting rods, etc.) for diesel and industrial engines. Many of the rebuilding procedures currently used by similar shops throughout the country were patterned after the methods pioneered by Broadway Machine. In 1968, Dora Mullins transferred ownership of the company to Merlin Russell, and her daughters, Avon Mullins Hollingshead and Frances Mullins Rumsley. Merlin continued as General Manager until his passing in 1986 at which point management duties were split among his wife Linda Russell, and Avon and Frances. 

In 1987 they sold the business assets to Art and Linda Huggard who previously owned and operated Diesel Casting Service in Tulsa. With the purchase of Broadway Machine, the Huggards moved back to Oklahoma City to oversee operations. They quickly upgraded machinery and added on to the existing facility. Following Art's passing in 1997, Linda continued to run and grow the company. 

In 2023, after 36 years of owning and operating Broadway Machine, Linda sold the assets of the company to Chris and Emily Shuart. Chris oversees the shop operations on a daily basis and runs all the office functions. Through the ownership change, the Shuarts were able to retain 100% of the workforce and are planning to upgrade equipment and continue to grow the legacy of Broadway Machine.