Sears IO3.243OO, 103.24300 Operating & Parts Manual

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OPERATING

INSTRUCTIONS

AND PARTS

IJIST FOR

BAND SAW

12

INCH

Instructions

for

Ordering

P

All

parts

listed herein

rnust

be ordered

through

a Searg

retail store or

rnail

order

house. Parts

are shipped

pre-

paid.

When ordering

repair

parts,

always

give

the follow-

ing inforrnation:

l. The Part Nurnber,

2. The

Part Narne

and

Price.

3.

The Model

Nurnber 103.24300.

This list is valuable. It

will

assure

your

being able to

obtain

proper parts

service. We suggest

you

keep it with

other valuable

papers.

SEARS, ROEBUCK

and

CO.

LITHOGRAPHED IN

U. S.

A.

Model Number IO3.243OO

This is

the

rnodel nurnber

of

your

Band

Saw. It will be

found on a

plate

on the back cover.

Always rnention

this

rnodel

nurnber when

comrnunicating with us regarding

your

Band

Saw or

when

ordering

parts.

Source Forrn

3@19

OPERATING

INSTRUCTIONS

AND PAR,TS

LIST FOR.

BAND

SAW

tnoDEt

NUMBER I

03.24300

COVER RETAINING NUTS

BTADE GUIDE

SAW GUARD

TABTE TIIT IOCK

HAN

TABLE TIIT POINTER

FIGURE

I

TNSTATLATION:

The Band Saw

should be bolted

securely

to a solidly

built

work bench. It

is suggested

that the

saw be

installed

so

that

the table

is

38

to 42 inches

from the

floor to suit

the operator.

Four

9

/32

inch

holes

have been

provided

in the

band saw feet for bolting to the

bench.

The

motor, as recommended in a later

paragraph,

may be installed behind or below

the tool. The

drive

pulley

is

designed for use with a standard

Yz

inch

V belt.

The length of this belt

may

be determined

after the

motor

position

has been

selected

by measur-

ing

with

a

piece

of string

or flexible

tape around

the

outside diameter

of the

pulleys,

not in

the

grooves.

A hole approximately

3t/2

inches sguare should

be

cut in the work

bench

directly ahead

of the

front feet

::#::.nt

the

accumulation

of

sawdust

inside

the

lUBRICATION:
The

special double

row

ball

bearing built into the

drive shaft

has been

packed

with lubricant

and

sealed

at the factory. It

should require no further

attention.

Note: If replacement of

this bearing is necessary

in the future, full instructions covering

the removal of

the old bearing and the

installation

of

the

new

one

will be supplied with the replacement

part.

Apply a

few

drops

of oil

(SAE

#30)

to the

idler

wheel

needle bearings. This may be accomplished

after

removing the rubber

oil

hole

plugs

in

the

hub

of the idler

wheels. Replace

the

plugs

after

oiling.

The

blade

thrust

rollers,

#18232,

should

be

lubri-

cated occasionally. Other

moving and sliding

parts

such as

the

guide

slide

and table

trunnions

rnay

require occasional lubrication

to

maintain their

smooth

operation.

SPEED

AND POWER:

For

general

use

with wood and

similar material,

proper

operating speed

and

power

may

be

attained

by using

a |

/3

horsepower

1750 R.P.M. motor

equipped

with a 3 inch diameter

pulley.

When

purchasing

the 3" motor

pulley

mentioned

-

above

be sure

to specify

the

shaft diameter

of

your

motor.

Install

the motor

so

that

the direction

of

rota-

tion

of the

Drive

pulley

is counter-clockwise

when

viewed from

the

pulley

side

of

the

tool.

CONTROtS:
The table

may be

tilted from a

level

position

to

45

degrees forward,

after

loosening

the

table

tilt

lock

with

the

handle

provided.

The

degree

of

tilt is shown

on the calibrated

trun-

nion scale by

.

pointer

as

shown in

figure l.

The

upper

g,rid.

arrembly

may be raised

and

lowered to

accommodate

material of various

thick-

ness after loosening

the blade

guide

elevation lock

knob

shown

in 6gure l.

The blade thrust roller arsemblies

and

the

lateral

guides

in both

the

upper

and lower blade

euide

assemblies

may

be reset

after

the

set screw

holding

each unit

has been backed out

several turns.

ADJUSTftTENTS:

This

band

saw

was

completely

checked

and

tested

under

power

at the factory.

Rough handling

in ship-

ment may have

caused some

misalignment during

transit. Following

are

several

points

which might be

checked

to

insure

proper

operation.

The table should

be

square

with the blade

when

the

pointer

indicates

zero

on

the trunnion scale. If

this

is

not

the

case

the tool

will

not

produce

accurate cuts

when set

aeeording to thi,srcalc.-€orectionsmay

be

made

by resetting the

table

square with

the blade

(use

an

accurate square) and

then

readjusting

the

pointer

to

the

zero

mark

on the

scale

by

loosening the screw

which

holds

the

pointer

to the tool.

cover

near

the

blade tension

adiusting

knob.

The

cover

may be

removed

for checking

tension

or t€'

placing

blades

after removing

the

three

knobs directly

opposite the

cover retaining

nuts

shown

in 6gure

l.

Tension

adjustments

for the

variouswidth

blades may

be made

according

to figure 2.

To remoye or

replace a blade,

remove

the

front

cover

and the

set screw

in

the

table

slot.

Release

the

tension until

the

blade

may

be slipped

off

easily.

In-

stall the new

blade with

the

teeth

pointing

down

and

away

from the

drive

pulley

and

apply

the correct

tension.

Turn

the

pulley

forward

by hand for at least

a dozen revolutions

or

more.

Watch caret,,.'^ry

to see

that

the

blade

tracks

in

the

same spot

consistently.

If the blade tends to

ride

off the

wheel, two

adjust-

ments are

provided

to

return

the blade

to

its

proper

track

at the center of the drive

wheel.

For minor adjustment of

blade

tracking

difficulties,

the

blade

alignment adjusting

knob

shown

in

figure

I

may

be turned

slightly in or out causing the rear

idler

wheel to

pivot

and retrack

the

blade.

If

this

ad-

justment

is not sufficient the

shaft

on

which the

up.per

idler

wheel is mounted

may

be

moved toward

ot

away from

the frame.

It

is

held in

place

by the

square

head screw

in

the casting

over

the

shaft.

Be

certain

that

this

screw

is

securely

tightened

after

any

adjustment

of the

upper idler wheel.

Check

the

blade

for

correct tension

before

re-in-

stalling

the

cover.

Replace

the

set screw

in the

table

slot.

Blade

guide

assemblies

are

provided

both above

and

below

the. table

to support the blade

against

lateral

and

direct

thrust.

The

roller type

guides

be-

hind

the blade should

be set approximately

|

/64

inch

from

the blade

edge.

The

blade should touch

these

rollers

only

when

cutting, and

not when the

saw

is

running

free.

The lateral

guides

should be

set

as

close

as

possible

to

the blade without touching.

When

viewed

from

the side

they

should be in such

a

position

that if the

blade

is

pushed

against

them,

the

flat sur'

face,

and

not

the teeth

will ride the

guides.

These

Iateral

guides

should

be

checked often and

refaced

and reset

when

necessary,

to

keep them

close to

the

blade.

When

the saw is

turned by

hand,

or when running

free

under

power,

the

blade

should track

smoothly

on

all

three

wheels,

and should

touch

none

of the

guides,

upper

or

lower.

The

complete

lower

guide

assembly

is

held

in

place

by

"

set

screw through

the frame

casting

and

may

be

adjusted

as

a unit

after

loosening

this set

scre!r'.

After

making

any

adjustment

on

the

Band Saw,

check

carefully

by

turning

the

mechanism

by

hand

several

times

before

applying power.

BIADE:

Following

are

several

common causes of

band

saw

blade breakage. Avoid

these

situations

by frequently

ADVANCE

WASHER

TO THIS POSITION

TO

APPTY THE

NECESSARY

TENSION FOR

3/I

INCH WIDE

BIADES.

WITH

WASHER

AT THIS

POSIIION

PROPER

TENSION

HAS

BEEN

APPTIED

FOR BOTH

3/r6

AND

r/r

INCH BLADES.

FIGURE

2

A stop

screw

with lock

nut

may

be found

projecting

from

the lower table

surface

over

the frame casting.

This

screw

when

properly

set

will allow accurate

return of

the

table to

a

true

le.rcl

position

after it has

been

tilted

for an angular

cut.

The

proper

tension

for the

3/ | 6, |

/4,

or 378

inch

wide blades recommended

is

shown

on the

blade

tension indicator.

This indicator is

just

inside

the

checking

adjustments

and

by

exercising

care in opera'

tion,

and

you

will

be rewarded

by increased life

and

service from

your

blade.

Excessive

tension

greatly

shortens

the

life of

the

blade.

Failure

to bring

the upper

guide

assembly

down

close to

the work allows

distortion of the

blade which

encourages

breakage.

Excessive feed

pressure

causes the

blade to

ride

hard

on

the

thrust

roller,

the

friction

hardens

the

blade

edge which

causes

cracking and

breakage.

A

dull blade, or

one that

has

been

improperly

set or

sharpened will require

much

greater

feed

pressures

than a

good,

sharp,

properly

set blade.

To keep

the

blade in

good

cutting

condition it

should be

sharp-

ened

after

every 4 to 6 hours

of actual

cutting.

If the

guides

are

set

too

close

to

the blade, rubbing

constantlJy',

or

causing

blade

defection,

the

blade life

and service are

definitely

shortened.

Both

the

guides

and

the

blade

will

be damaged

if

the

guides

touch

the

teeth

rather than the

smooth

sides

of

the blade

when

lateral

thrust

may be applied

during

the

cutting

of irregular shapes.

A

poor

weld where the

blade

ends

are

joined,

or a

weld

that

is improperly

dressed

down, leaving

a

bump,

is

often

a cause

of short

blade

life.

If the

blade

is allowed

to rust,

either on

the tool or

in

storage,

pitting

caused

by rust

may be

severe

enough

to

cause

breakage.

Oil

all blades

before

stor-.

ing-tlnipe

oil off before

installing

on

Band

Saw.

Finally

one

of

the

most

common

causes

of blade

difficulty

is the

practice

of cutting

too sharp

a

radius

or

of

turning

the

work

piece

too

fast

when

cutting

a

radius

thus

binding

or

twisting

the

blade.

Following

is a table

showing

the

minimum

radius

which

should

be

cut

with

various

width

blades.

Blade

Width

Inches

3/t6

t/4

3/8

Minimum

Radius

Inches

t/2

I

3

FIGURE

'

It

is

generally

considered a

good policy

to

work

at

least

/a

inch

over

the specified

minimum radius.

When storing

blades,

they

may be folded simply

and

conveniently

in

the

following

manner:

Hold

the

blade in

front of

you,

teeth

pointing

away,

so that

you

can look

through

the

circle formed by the

blade.

Grasp

the blade with the

left

hand

so

that the

thumb is on the

smooth

edge

of

the

blade toward

your

body and the

fingers are

on

the blade

teeth.

Place the

right

hand at a spot

directly across the

circle

so

that the

thumb

is away

from the body

on the

saw

teeth while the

fingers

are on

the

smooth

edge toward

the

body.

The hands should

now be on opposite

sides

of the

circle

and

in

exactly

opposite

positions-1hs

palm

of

the

left hand and

the back of

the

right

hand

toward

your

body.

Without

letting

go

of

the

blade,

twist

each

wrist

until the

palm

of the right

hand

and

the

back

of

the

left

hand

is

toward

the

body.

As

the

hands are

moved slowly

to within

6 to

8 inches

of

each

other

during thiS

twisting

motion,

the

blade

will

fall into

a folded

pattern

of

3 small

circles

as shown

in the

parts

illustration.

,A

small

loop

of string

or

6ne

wire

applied

at two

opposite

points

on the

small

circles

will

hold

the

blade

in this

shape till

released

for

reinstallation

on

the

saw.

OPERATION:
Hold

the work

piece

6rmly against the table surface

during cutting

operations.

If

the

piece

is

allowed

to

tilt or otherwise raise from the

table,

the

angle

of the

cut

will

not

be square.

To simplify

the cutting of

complex

6gures,

it is

advisable to rough

out the

general

shape before

finish-

ing

the

cut

on

the

planned

line, If

possible,

when

you

come

to a sharp curve,

cut

it

with

a

series of

tangent

cuts rather

than in one operation.

It

is

often

more

practical

to

turn

and

cut out through

waste

stock

rather than

to

pull a partially

completed

cut

back

off

the

blade,

thus

running a risk

of catching

the

blade

and

pulling

it off the

wheel.

If

you

keep

your

mind

slightly ahead of the

blade,

thus anticipating curves and changes

in

position

of

the

work

piece, you

will find it much easier to follow

the

planned

line. Sharp turns

often

may be cut

much

more

e'asily after drilling out

the

area

near

the

turn

before starting the

sawing

operation.

Corners

are

cut

guite

easily by

first cutting

around

the

corner in a

comfortable

radius and

then

returning

to saw

the

corner from each

side.

Narrow

slots can

be worlced

out

by making

repeat

cuts to the

end

of

the

slots.

Do

not force

the work

against the

blade

in

excess

to the cutting

capacity of

the blade as this

will

make

the

following

of a

pattern

extremely

difiicult.

A

few

practice

cuts

should

enable one

to

get

the

feel of

band sawing.

36711
36713
36u3

r8o21

@-

3&r2

36728
x5r6

18517
18629
x&2

36718

Part

No. PART NAME

Framc Arrcmbly

with

Drlvc

Shaft

and

Bcarlng,

Shroud

Studr,

and Trunnlon Guldc

Plnr..

...,,/.......f20.00

Blade

Thmrt

Bcarint

Arcrnbly.

.60

Pivot

Shaft . .. .

.E0

Pivot

Adjueting Knob

.45

fdlcr Vhecl with

Bcarin3r,

Tirc

and Oil Plug..

t.75

Front Covcr

.... ..

10.00

Back Covcr ....

10.00

Bearlng-Drivc Shaft wtth Snap Ring

and

Woodnrfr

Kcy

1.75

Pullcy with

rct rcrwt-l lnch

rlngle

groovc

V-pullcy

16

tnch borc.

Purcharc from

your

norrclt

Scarr

rctrll

ltorc or

mail

ordcr hourc. Ark for C-atalo3 No. 9-2E0{

16

lnch

borc.

l$2t2

Bladc

Thrurt

Rollcr

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lE{49 Guldc Tenrion

Sprin3

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Lock

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Her

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10.00

--t6all

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.60

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.20

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36411

Lowcr Guidc

Brackct

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1.20

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1.00

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Pin

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.r0

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stud

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.25

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Ring

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t67

12

Upper Guide

Brackct Loclc

Spaccr

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with

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1.60

t67

19

Tablc

Trunnion

Plain

1.50

Part No. PART NAME

Prepald

Sclltng

Prlcc
Each

t6721 Saw Guard

.t

1.00

16722

Tcnaion

lndicator

.2t

t672, Spaccr

.lt

t6721

Tablc

Tilt Lock

Clamp

....

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t672E Polntcr .15
36729

Band

Saw

Blade--Purcharc from nGarcrt Scarr rctall

rtorc

or mall

ordcr houec. Ure

only C-atalog

No.

9-266{

ar

thir ir

the only blado which

wtll

givc

ratirfectory

!GrvlCG.

,6711

Rer

Lcg

t67tL

Front Lcg

16E12 Saw

Guidc

36E13

Oil

Holc Plug

.

36E15

Whecl Tire

.

Prcpatd

Sellins

Prlcc

Erch

PARTS IIST

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xt09

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Bladc

Tcneion Spring

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Scrcw

%-2O r |l

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Cup Point...... .10

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yr-20

r % Slottcd Head Cup Point......

.10

Set

Screw

No. 10-20 r % Slottcd

Hcad

Cup

Point.. .10

Set Scrcw 5/16-lC

r

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Slottcd Hod Cup Polnt..... .10

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locelly.

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part.

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packing

rlip.

Thc

parta

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and

lirtcd rnay

ln.

clude acceerorier

not

ncccr.arily

part

of

thir tool.

All

paft.

arp rhippcd

prepaid.

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pricer

arc

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change

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Screw 5/16-lE

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Point. .... .10

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No. 40{

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