Singer 457U135 Manual

Operator's Guide
SINGER*
457U105,457U125,457U135,457U140 Machines
LUBRICATION
FOR THE AUTOMATIC LUBRICATION
USE SINGER "TYPE C" OIL ONLY
Check oil flow in window when
machine is running.
Check oil flow to hook by
holding asmall piece of paper
under the hook while machine
is running. After 15 seconds,
the paper should show an
oil pattern of approx
1/32 inch (0.8mm).
Less oil
More oil
Fill oil reservoir
to high mark.
Check daily.
©
©
Regulating screw for
hook lubrication
SPEED
The maximum speeds recommended for Machines of Class 457U are 5000 RPM
(4500 RPM for 457U140), however, for the first 150 hours machines should
be run at least 500 RPM below maximum recommended speeds.
From the library of: Superior Sewing Machine & Supply LLC

NEEDLES
Use Singer needles
Catalog 1906
{chromium finished)
Machine 457U140 only
Catalog 8752
(chromium finished)
—In sizes determined by
size of thread and type
of material being sewn.
UPPER THREAD
1. Before threading, any
remains of thread must
be removed from the
rotary take-up.
CAUTION: Be careful to
avoid injury from
thread cutter O •
2. Thread only with the
needle bar in highest
position.
Move needle bar to
highest point
Move needle bar
to highest point
Loosen screw
Insert needle up as far
as possible and tighten
screw
Long groove
SETTING THE NEEDLE
From the library of: Superior Sewing Machine & Supply LLC

BOBBIN REMOVAL AND REPLACEMENT
BOBBIN WINDER
Wind thread
around bobbin
REMOVAL
1. Open latch
2. Hold latch and
pull bobbin case from hook
3. Release latch
4. Bobbin drops out
REPLACEMENT
5. Holding latch, replace
bobbin case on stud
6. Release latch
7. Press back until latch
catches groove in stud
O Place bobbinon spindleas
far as it will go
Press lever
against bobbin
From the library of: Superior Sewing Machine & Supply LLC

THREADING BOBBIN CASE
Draw thread down
and under spring
0 Pull thread
into slot
o Drawthread up
Into delivery eye
Lead thread
into slot in
bobbin case
Use slotO when sewing Light-weight material.
Use slot ©when sewing medium-weight material.
THREAD TENSIONS
BOBBIN THREAD
NEEDLE THREAD
4
More
Tension
Less
Tension
Tension on threads should
be as light as possible, while still
sufficient to set stitch
correctly in material.
More tension
Less tension
Regulate needle thread
tension only when presser foot is down.
From the library of: Superior Sewing Machine & Supply LLC

STITCH LENGTH REGULATION
457U105,457U125,457U135 MACHINES
STITCH LENGTH REGULATION
457U140 MACHINE
TILT MACHINE TO REAR
Loosen lock nut
Shift connecting rod:
To left—longer
To right—shorter
Tighten lock nut
RETURN MACHINE
TO SEWING POSITION
REVERSE FEEDING
Turn regulating screw
to desired stitch length
FORWARD FEEDING
Turn regulating screw
to desired stitch length
CHANGING TO REVERSE FEED
Push lever down for
reverse feeding and release
for forward feeding.
From the library of: Superior Sewing Machine & Supply LLC

ZIG-ZAG STITCH SETTING
457U105 MACHINE
Set hand lever to desired zig-zag
stitch within 0-8 bight range
NEEDLE POSITIONING:
Set hand lever to desired needle
positions
Left: Center:
Right:
ZIG-ZAG STITCH SETTING
457U125,457U135,457U140 MACHINES
Locking screw for
bight control lever
457U125 MACHINE
Set hand lever to desired zig-zag
stitch within 0-5 bight range
457U135,457U140 MACHINES
Set hand lever to desired zig-zag
stitch within 0-8 bight range
From the library of: Superior Sewing Machine & Supply LLC

PRESSER FOOT PRESSURE
The pressure on the material should be as
light as possible, while still sufficient to
ensure correct feeding.
CLEANING
Clean out any lint or other waste around
the hook, between the feed rows on the
underside of the throat plate and in the
hook area of the oil pan.
pressure
More
pressure
* A Trademark of THE SINGER COMPANY
Copyright ©1987 SINGER SEWING MACHINE COMPANY
All Rights Reserved Throughout The World
From the library of: Superior Sewing Machine & Supply LLC

Form U3150 (Rev. 990)
Part No. 543182-002 (Rev. 2)
Printed in Japan
From the library of: Superior Sewing Machine & Supply LLC