This Assembly replaces the following mini drive train items: Main shaft; Main gear; Set screw; Primary drive gear. 2x 4x8x3.0 mm ball bearings Technical Specification Shaft length: 28.1 /-0.08mm Shaft length to support ball bearings : < 3.3mm – 3.3mm > Filament teeth’s center to end of shaft : < 21.84mm – 6.30mm > Number of drive gear teeth : 17 Drive gear teeth length : 4mm Mainshaft/drive gear Material: Hardened Steel Materials Compatibility: Flexible : yes; Rigid : yes; Abrasive : yes. Number of main gear teeth : 50 Main gear teeth length : 3mm
