Ink Key Motor Servo Motor For Heidelberg Sm52 Sm74 Sm102Servo Motor for Ink Key Slides Heidelberg CPC. Also referred to as Ink Duct and Ink Key Motor. This Product is Brand New. Heidelberg Part Number: 61.186.5311/03 Our Part No: PRI03061186531103 Fits new style Heidelberg Speedmaster including SM74 and SM102, GTO, MO and others.Features of Ink Key..