![background image](/i/singer/167569/singer-heavy-duty-4411/h/singer-heavy-duty-4411-006.png)
14. Horizontal spool pin
15. Bobbin winding spindle
16.
uxiliary spool pin
17. Handwheel
18. Buttonhole stitch balance adjustment slot
19. Power and light switch
20. Main plug socket
21. Bobbin thread guide
22. Upper thread guide
23. Face plate
24. Handle
25. Presser foot lifter
26. Drop feed control
27. Foot speed control
28. Power cord
Hole for a
3
28
24
25
27
22
23
26
19
20
21
14
15
16
18
17
Principal Parts of the Machine