Singer 457U135 User 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 a small 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

Singer 457U135 Specifications

General

Brand	Singer
Model	457U135
Category	Sewing Machine
Language	English

Summary

LUBRICATION

Automatic Lubrication Oil

Use SINGER "TYPE C" OIL ONLY. Check oil flow in window when machine is running.

Hook Lubrication Check

Check oil flow to hook by holding paper under hook while running. Paper should show oil pattern.

Oil Reservoir Check

Fill oil reservoir to high mark. Check daily.

SPEED

Recommended Operating Speeds

Max speeds for 457U are 5000 RPM (4500 for 457U140). Run 500 RPM below max for first 150 hours.

NEEDLES

Recommended Needle Types

Use Singer Catalog 1906 (chromium). For 457U140, use Catalog 8752. Sizes determined by thread/material.

UPPER THREAD

Threading Preparation

Remove thread remnants from rotary take-up. Be cautious of thread cutter.

Threading Procedure

Thread only when needle bar is in the highest position.

Setting the Needle

Loosen screw, insert needle fully, tighten screw. Ensure long groove faces front.

BOBBIN REMOVAL AND REPLACEMENT

Bobbin Case Removal

Open latch, pull bobbin case from hook, release latch, bobbin drops out.

Bobbin Case Replacement

Hold latch, replace bobbin case on stud, release latch, press until groove catches.

BOBBIN WINDER

Using the Bobbin Winder

Place bobbin on spindle, wind thread around bobbin, press lever against bobbin.

THREADING BOBBIN CASE

Bobbin Case Threading Steps

Pull thread into slot, under spring, up delivery eye, and into bobbin case slot.

Slot Selection for Material

Use slot A for light-weight, slot B for medium-weight material.

THREAD TENSIONS

Bobbin Thread Tension Adjustment

Set tension as light as possible for correct stitch formation.

Needle Thread Tension Adjustment

Regulate needle thread tension only when presser foot is down.

STITCH LENGTH REGULATION (457U105, 457U125, 457U135 MACHINES)

Reverse Feed Stitch Length

Turn regulating screw to set desired stitch length for reverse feeding.

Forward Feed Stitch Length

Turn regulating screw to set desired stitch length for forward feeding.

Switching Between Feeds

Push lever down for reverse feeding, release for forward feeding.

STITCH LENGTH REGULATION (457U140 MACHINE)

Adjusting Stitch Length

Tilt machine, loosen nut, shift connecting rod left/right, tighten nut.

ZIG-ZAG STITCH SETTING (457U105 MACHINE)

Zig-Zag Stitch Width

Set hand lever to desired zig-zag stitch width within 0-8 bight range.

Needle Position Adjustment

Set hand lever to desired needle positions: Left, Center, or Right.

ZIG-ZAG STITCH SETTING (457U125, 457U135, 457U140 MACHINES)

457U125 Zig-Zag Width

Set hand lever for zig-zag stitch width within 0-5 bight range.

457U135/457U140 Zig-Zag Width

Set hand lever for zig-zag stitch width within 0-8 bight range.

PRESSER FOOT PRESSURE

Adjusting Presser Foot Pressure

Pressure should be light as possible, sufficient for correct feeding.

CLEANING

Cleaning Procedure

Clean lint/waste around hook, feed rows, and hook area of oil pan.