1868 - Gotthard and John A. Schaff started manufacturing pianos in Chicago under the name of G. Schaff Bros.

1884 - John A. Schaff created a string winding machine and thus a bass string manufacturing business was born. Chicago was becoming the center of production for many major piano companies and there was a large demand for quality bass strings.

1955 - Robert E. Johnson Sr., and Robert E. Johnson Jr., purchased the piano supply business from Continental Music, which was previously owned by Lyon & Healy. Lyon and Healy had originally purchased the supply company from Tonk Bros. Manufacturing.

1978 - Herbert, David and Stephen Johnson, sons of Robert E. Johnson Jr., decided to relocate Schaff Piano Supply Co. and Schaff Piano String Corp. to a new warehouse in Lake Zurich, IL.

2000 - Schaff Piano Supply Co. acquired American Piano Supply Co. and its division, John Schadler and Sons, located in Clifton, NJ, which included Tuners Supply Co. and the HALE name.

2002 - The 6th generation is presently active in the management of Schaff Piano Supply Co.

2011 - Acquired Pianophile Inc., a piano parts distribution company in Montreal, Canada.

2018 - Moved into a new state-of-the-art warehouse.