Singer Centurion 121C User Manual

SINGER
121D,121C

Singer Centurion 121C Specifications

General

Brand	Singer
Model	Centurion 121C
Category	Sewing Machine
Language	English

Summary

LUBRICATION

HOOK LUBRICATION

Details on the oil reservoir for the sewing hook race and its filling.

STITCH LENGTH ADJUSTMENTS

PREVENTING UNAUTHORIZED CHANGES IN STITCH LENGTH

Securing stitch length settings to prevent unauthorized modifications.

ADJUSTABLE STITCH LENGTH STOP

Procedure for setting a maximum stitch length limit.

PRESSER FOOT PRESSURE

HOOK TIMING

For 200 Variety Machines (.085" Loop Rise)

For 300 Variety Machines (.100" Loop Rise)

FEED DOG SETTINGS

LATERAL SETTING

Adjusting the lateral position of the feed dog.

LENGTHWISE SETTING

Adjusting the lengthwise position of the feed dog.

HEIGHT SETTING

Adjusting the vertical height of the feed dog.

FEED DOG HEIGHT ADJUSTMENT

AT 043 INCH

AT 032 INCH

CHECK SPRING SETTING

TENSION ADJUSTMENT

NEEDLE BAR SETTINGS

SETTING NEEDLE BAR FRAME TIMING INDICATOR

SETTING NEEDLE BAR HEIGHT

BOBBIN WINDER ADJUSTMENTS

DRIVE WHEEL ADJUSTMENT

TO ADJUST BOBBIN WINDER