Singer Centurion 121D User Manual

SINGER
121D,121C

Singer Centurion 121D Specifications

General

Model	Centurion 121D
Number of Stitches	21
Max Stitch Width	5 mm
Max Stitch Length	4 mm
Needle Position	Center
Needle Positions	1
Feed Type	Drop Feed
Buttonhole Type	4-Step
Buttonhole Styles	1
Presser Feet	All-Purpose Foot, Zipper Foot, Buttonhole Foot
Included Accessories	Needles, Bobbins, Screwdriver, Seam Ripper
Dimensions	38 x 17 x 30 cm
Type	Mechanical Sewing Machine

Summary

LUBRICATION

HOOK

Details oiling the sewing hook race.

TO TEST HOOK LUBRICATION

Procedure to check oil flow pattern.

MACHINE THREADING

PRESSER FOOT PRESSURE

HOOK TIMING

TIMING FEED LIFTING SHAFT TO ARM SHAFT

TENSION

PRESSER BAR AND FOOT SETTING

SETTING NEEDLE BAR FRAME TIMING INDICATOR

SETTING NEEDLE BAR HEIGHT

(using timing marks)

Setting needle bar height using timing marks.

(without using timing mark)

PRESSER BAR (Disassembly)

NEEDLE BAR FRAME AND TAKE-UP MECHANISM (Disassembly)

ARM SHAFT (Disassembly)

FEED LIFTING SHAFT (Disassembly)

FEED ROCK SHAFT (Disassembly)

FEED REVERSING MECHANISM (Disassembly)

FEED REVERSING LEVER MECHANISM (Disassembly)

KNEE LIFT MECHANISM (Disassembly)

HOOK SHAFT & BUSHING (Disassembly)

FEED REVERSING LEVER MECHANISM (Assembly)

FEED REVERSE DRIVE ASSEMBLY (Assembly)

FEED ROCK SHAFT (Assembly)

FEED LIFTING SHAFT (Assembly)

HOOK SHAFT AND HOOK SHAFT BUSHING (Assembly)

KNEE LIFT MECHANISM (Assembly)

ARM SHAFT (Assembly)

NEEDLE BAR FRAME AND THREAD TAKE-UP MECHANISM (Assembly)

PRESSER BAR ASSEMBLY (Assembly)

NEEDLE BAR FRAME DRIVING LINKAGE ADJUSTMENTS