Singer 451k45 User Manual

Form K6S06
(562)
SERVICE MANUAL
PARTS LIST
SINGER
451k41, 451k45 and 451k145
HIGH SPEED
SINGLE NEEDLE
LOCK STITCH
MACHINES
Machine 451K41
THE SINGER MANUFACTURING COMPANY
Copyright Under International Copyright Union
*A Trademork of THE SINGER MANUFACTURING COMPANY
Printed in Great Britain
From the library of: Superior Sewing Machine & Supply LLC

Singer 451k45 Specifications

General

Brand	Singer
Model	451k45
Category	Sewing Machine
Language	English

Summary

SETTING UP

LUBRICATION AND CLEANING

CLEANING

HOOK LUBRICATION

HOOK LUBRICATION TEST AND ADJUSTMENT

Steps to test and adjust the oil flow to the sewing hook.

NEEDLES

TO SET THE NEEDLE

Instructions for correctly installing a needle into the needle bar.

TO WIND BOBBIN

TO THREAD BOBBIN CASE

TO REPLACE BOBBIN CASE

TO PREPARE FOR SEWING

THREAD TENSION

NEEDLE THREAD TENSION SETTING FOR GENERAL PURPOSES

TO REGULATE BOBBIN THREAD TENSION

TO REGULATE NEEDLE THREAD TENSION

TO REGULATE PRESSURE OF PRESSER FOOT ON MATERIAL

TO REGULATE THE LENGTH OF STITCH

TO REVERSE THE FEED ON MACHINES 451K45 and 451K145

TO START SEWING

TO REMOVE BROKEN NEEDLE THREAD FROM ROTARY TAKE-UP

TO AVOID THREAD BREAKAGE

15 HINTS FOR CAREFREE OPERATION

SPECIFICATIONS

PRELIMINARY INSPECTION

TO TIME THE MACHINE

SETTING NEEDLE BAR AT CORRECT HEIGHT

Adjusting the needle bar height using timing marks.

SET NEEDLE BAR AT CORRECT HEIGHT WITHOUT USE OF TIMING MARK

Alternative method to set needle bar height when timing marks are disturbed.

TO RESET NEEDLE BAR BUSHING

Procedure to reset the needle bar bushing for correct alignment.

TO TIME SEWING HOOK

Steps to synchronize the sewing hook's timing with the needle.

CLEARANCE BETWEEN NEEDLE AND POINT OF HOOK

Setting correct clearance between needle and hook point.

FUNCTION OF BOBBIN CASE HOLDER NEEDLE GUARD

TO SET CHECK-SPRING

Procedure for setting the check-spring tension and position.

TO SET CHECK-SPRING (Cont'd)

Further instructions for setting the check-spring height and tension.

TO ADJUST THE NEEDLE THREAD TENSION RELEASER

TO SET PRESSER BAR AT THE CORRECT HEIGHT

TO TIME THE FEED

TO CENTRALIZE FEED DOG IN THROAT PLATE SLOTS

TO PREVENT UNAUTHORIZED CHANGE OF STITCH LENGTH

TO SET FEED DOG AT CORRECT HEIGHT

TO ADJUST FEED DRIVING AND REVERSING MECHANISM

THE BOBBIN CASE HOLDER

THE SEWING HOOK

THE HOOK SHAFT

THE HOOK DRIVING SHAFT

THE ARM SHAFT