Automatic Thread Cutter Unit, Janome #858630019 Details
Fits Janome sewing machine models:
MC7700QCP
The motor (858683006 - MC8900) is same as MC7700 but has extra brackets for the needle plate to slide into, MC7700 (858630008 - MC7700) has screw on plate so no brackets on that motor. May not be exactly as shown.