AMT 4121 Owner's manual

...

..--

--

6 INCH JOINTER

PLANE-

-'

'-----

___________

Model

4121

owners

manual

•

assembly

•

operating

•

repair

parts

CAUTION:

Read

SAFETY

RULES and

INSTRUCTIONS

carefully

Your new

6"

Long Bed

Jointer

is

a precision-engi-

neered

tool

incorporating

all

the

advanced features

that have been asked

for

by

cabinet

makers, carpen-

ters,

maintenance

men, pattern makers, school

shop

instructors

, farmers and

dozens

of

other

users. It

is

designed

to

satisfy

the

great

demand

for

a

high

quality

jointer

at a

relatively

low

cost.

@

With the jo

inte

r-planer you can make

cuts

for

doors,

window

frames, and table drawers and accurate glue

joints.

It will make square

taper

cuts

for

chair

legs,

will

do

extremely

accurate

beveling, and

trimming,

will

remove warps and

smooth

rough edges on

51

:k

up

to

6"

wide.

SAFETY RULES FOR JOINTER - PLANER

Safety

is

a

combination

of

operator

common

sense

and a

ler

tness

at all

times

when

the

Jointer-Planer

is

being used.

1.

Wear eye

protection

.

2.

Never pe

rform

jointing

or

planing

operation

with

cutter

head

or

drive

guard removed.

3.

Never make

jointing

or

planing

cut

deeper than

1/8 inch.

4.

Always use

hold-down/push

blocks

for

jointing

material

narrower

than 3 inches,

or

planing

material

thinner

than 3 inches.

5.

Do

not

perform

jointing

operations

on material

shorter

than

(a

dimension

equal

to

the

culler

head

length

plus

2 inches),

narrower

than

3/4

inch,

or

less than 1/4

inch

thick.

6.

Do not perform

planing

oper<.tic'll4

shorter

than

(a

dimension

length

plus

2 inches),

na'~~;~~~~It~

wider

than (the

cutter

thinner

than 1/2

inch

.

7.

Maintain

the

proper

relation~h,jp~:~

outfeed

table

surfaces

path.

8.

Support

the

work

piece

adeQuately at

alii

I

,

~~:~

~

during

operation;

maintain

control

of the

~

all

times.

9.

Do not back

the

work

toward

the

infeed

table_

10.

Do

not

attempt

to

perform

an

abnormal

or

IUU.

used

operation

without

study

and the use

of.,.

adequate

hold-down/push

blocks

,

jigs,

fixtures,

stops, and

the

like.

GENERAL

SAFETY

RULES FOR

POW

ER TOOLS

1. KNOW YOUR POWER TOOL

For

yOUf

own

safety

, read

the

owner's

manual

carefully

. Learn

its

application and

limitations

as

well

as

the

specific

potential

hazards

peculiar

to

this

tool.

2. GROUNDING INSTRUCTIONS

A .

All

grounded

,

cord

-

connected

tools

:

In

the

event

of

a

malfunction

or

breakdown,

ground

i

ng

prov

ides a path

of

least resistance

for

electric

current

10 reduce the risk

of

electric

shock.

This

tool is equipped

with

an electric cord

hav

ing an

equipment

-

grounding

conductor

and a

ground

i

ng

plug.

The

plug

must

be

plugged

into

a

matching

outlet

that

is

properly

i

nstalled

and

grounded in accordance

with

all local codes and

ordinances

.

Do

not

modify

the

plug

provided

-

if

it

will

not

fit

the

outlet.

have

the

proper

outlet

installed

by

a

Qualified

electrician.

Improper

connection

of

the

equipment-grounding

conductor

can

result

in a risk

of

electric

shock.

The

conductor

with

insulation

having

an

outer

surface

that

is

green

with

or

without

yellow

stripes

is

the

equipment-grounding

conductor

.

If

repair

or

replacement

of

the

electric

cord

or

plug

is

necessary.

do

not

connect

the

equipment

-

grounding

conductor

to

a

live

terminal.

Check

with

a

qualified

electrician

or

serviceman

if

the

grounding

instructions

are

not

completely

understood,

or

if

in

doubt

as

to

whether

the

tool

is

properly

grounded.

Use

only

3-wire

extension

cords

that

have

3-

prong

grounding

plugs,

and 3-

pole

receptacles

that

accept

the

tool's

plug.

Re

pair

or

replace

damaged

or

worn

cord

immedi

-

a

tely

.

B.

Gr

ounded,

cord

-

connected

tools

intended

for

u

se

on

a

su

pply

circuit

having

a

nominal

rating

...

. than

15

0

volts:

'A)

GROUNDING METHO

DS

COVEROF

GROUNDED

OUTLET BOX

~APTER

~OUNDING

(C) MEANS

Figure

1 -

Wiring

Methods

(6)

2

This

tool

is

intended

for

use

on a

circuit

that

has

an

outlet

that

looks

like

the

one

illustrated

in

Sketch

A in

Figure

1.

The

tool

has

a

grounding

plug

that

looks

like

the

plug

illustrated

in

Sketch

A

in

Figure 1 . A

temporary

adapter,

which

looks

like

the

adapter

illustrated

in

Sketches

Band

C,

may

be

used

to

connect

this

plug

to

a 2-

pole

receptacle

as

shown

in

Sketch

B

if

a

properly

grounded

outlet

is

not

available

.

The

temporary

adapter

should

be

used

only

until

a

properly

grounded

outlet

can

be

installed

by

a Qualified electrician. The green-colored

rigid

ear,

lug.

etc

.

extending

from

the

adapter

must

be

connected

to

a

permanent

ground

such

as a

properly

grounded

outlet

box.

3. KEEP

GUARDS

IN PLACE

and in

work

i

ng

order

.

4 . REMOVE

ADJUSTING

KEYS

AND

WRENCHES

Form

habit

of

checking

to

see

that

keys

and

adjusting

wrenches

are

removed

from

tool

before

turning

on

tool.

5. KEEP

WORK

AREA

CLEAN

Cluttered

areas

and

benches

invite

accidents.

6 .

DON

'T USE IN

DANGEROUS

ENVIRONMENT

Don

't

use

power

tools

in

damp

or

wet

locations

,

or

expose

them

to

rain

.

Keep

work

area

well

illuminated

.

7. KEEP CHILDREN

AWAY

All

visitors

should

be

kept

a

safe

distance

from

work

area.

8.

MAKE

WORKSHOP

KID PROOF

with

padlocks,

master

switches,

or

by

removing

starter

keys

.

9.

~ON'T

FORCE

TOOL

It

will

do

the

job

better

and

be

safer

at

the

rate

for

which

it

was

designed.

10.

USE RIGHT

TOOL

Don't

force

tool

or

attachment

to

do

a

job

for

which

it

was

not

designed.

11 .

WEAR

PROPER APPAREL

No

loose

clothing,

gloves, neckties, rings, bracelets,

or

jewelry

to

get

caught

in

moving

parts.

Nonslip

footwear

is

recommended.

Wear

protective

hair

covering

to

contain

long

hair.

12.

ALWAYS

USE

SAFETY

GLASSES

Also

use

face

or

dust

mask

if

cutting

operation

is

dusty

.

Everyday

eyeglasses

only

have

impact

resistant

lenses.

They

are

NOT

safety

glasses.

13.

SECURE

WORK

Use

clamps

or

a

vise

to

hold

work

when

practical.

It's

safer

than

using

your

hand

and

frees

both

hands

to

operate

tool.

14.

DON'T

OVERREACH

Keep

your

proper

footing

and

balance

at

all

times

.

1

5.

MAINTAIN

TOOLS

IN

TOP

CONOITION

Keep

tools

sharp

and

clean

for

best

and

safest

performance.

Follow

instructions

for

lubricating

and

changing

accessories

.

, 6. DISCONNECT TOOLS

FROM

POWER

SOURCE

before servicing and

when

changing accessories

such as

blades, bits, cutters, or

when

mounting

and

fe

-

mounting

motor.

17.

AVOID

ACCIDENTIAl

STARTING

Make

sure

switch

is in

"OFF"

position

before

plugging

in

cord.

18.

USE RECOMMENDED ACCESSORIES

Consult

the

owner's

manual

for

recommended

accessories. Use

of

improper

accessories may be

hazardous.

,

9.

NEVER

STAND

ON TOOL

Serious

injury

could

occur

if

the tool is tipped

or

if

the

cutting

too

l is

unintentionally

contac

ted.

20.

CHECK DAMAGED PARTS

Before

funher

use

of

the tool, a guard

or

other

part

that

is damaged should be carefully checked

to

ensure

that

it

will

operate

properly

and

perform

its

intended

function

-

check

f

or

alignment

of

moving parts, binding

of

moving parts, breakage

of parts, mounting, and any other conditions

that

may

affect

its operation. A guard or other part

that

is

damaged should

be

properly repaired or

replaced.

21

. DIRECTION

OF

FEED

Feed

work

into

a blade or cutter against the

direction of rotation of the blade or cutter only.

22.

NEVER

LEAVE TOOL RUNNING UNATTENDED.

TURN

POWER

OFF

.

Don't

leave tool until it comes to a complete stop.

WARNING:

DO

NOT ALLOW FAMILIARITY (GAINED

FROM

FREQUENT

USE

OF

YOUR

JOINTER-

PLANER)

TO

BECOME

COMMONPLACE. ALWAYS REMEMBER

THAT A CARELESS

FRACTION

OF

A SECOND

IS

SUFFICIENT

TO

INFLICT

SEVERE

INJURY.

FORESIGHT

IS

BETTER

THAN

NO

SIGHT

The operation

of

any po

wer

tool can result in foreign

objects being

thrown

into

the eyes,

which

can result in

severe eye damage.

Always

wear safety goggles com-

plying

with

ANSI

Z87.

1 (shown on Package) before

commencing

power

tool operation.

MOTOR REQUIREMENTS

This

machine

is

designed

to

use

a 1725

or

3450 RPM

motor.

A '-1/2 HP

motor

is

recommended.

(AMT

A603-1725 RPM

or

A682·3450 RPM

.)

NOTE: See

"O

PERATING SPEED REQUIREMENTS" Se

ction

for

proper

belts

and

pulleys.

NOTE:

Consult

a

qualified

electrician

for

proper

wiring

of

motor.

CHECK MOTOR ROTATION

The

motor

rotation

must

drive the

cutlerhead

in

the

counter-clockwise

direction

for

proper

cutterhead

operation.

1.

Place

motor

on

your

workbench

or

on

lIoor

with

pulley

properly

attached

on

motor.

WARNING: FOR YOUR OWN SAFETY, MAKE SURE

PLUG

IS

NOT CONNECTED

TO

POWER SOURCE

OUTLET WHEN CHANGING OPERATION.

3

2.

Stand

clear

of

motor

and

plug

cord

into

a

properly

grounded

outlet.

Notice

rotation

of

pulley.

If

it

is

not

turning

correctly,

REMOVE

pIuS)

from

outlet

,

and

change

rotation

of

motor

according

to

instruc-

tions

furnished

with

motor.

OPERATING SPEED REQUIREMENTS

The

jointer-planer

is

designed

to

de

liver

WOxl-

mately

15

,0

00

cuts

per

minute

with

the

cutt8lhead

turning

at 5,000 RPM.

This

is

the

sp

eed

that

will

de-

liver

optimum

performance.

WARNING: OPERATING THE JOINTER.pLANER

AT

SPEEDS HIGHER THAN THE RECOMMENDlDJ,OOO

RPM

IS

DANGEROUS AND SHOULD NOT IEIICINE.

FAILURE

TO

FOLLOW THIS WARNING CAN

IlElULT

IN PROPERTY DAMAGE ANDIOR PERSONAL

.....

JURY.

If a 1725 RPM (AMT A603)

motor

is

to

be

used

•

7'

motor

pulley

and

36'

"V"

belt

are

required.

I'

•

3450 RPM

molar

is

to

be used (A

MT

A882),

•

ot'

motor

pulley

and

36'

"V"

bell

are required.

This

will

deliver

the

proper

speed and

conform

to

the

recom·

mended

installation

of

the

machine.

CAUTION:

00

not

use

blower

or

washi

ng

machine

molars

or

any

motor

with

an

automatic

reset

over-

load

protector

as

their

use may be haz

ardous

.

UNPACKING AND CHECKING CONTENTS

The 4121

jointer

is

packed in

two

separate

cartons,

one

for

the

basic

mac

hin

e and

the

other

for

the

10

01

stand

.

Separate

all

parts

from the

packaging

materials

and

check

each one

with

the table 011005e

parts

below

. See the

parts

explosion

and

list

on pages

11

& 12

for

parts

indentification

.

TABLE

OF LOOSE PARTS

CARTON

1,

BASIC

MACHINE

A. Basic

Machine

B.

Cutler

Guard

C. Bell & Pulleys

D.

Mach

in

e Guard

E.

Chip

Chute

F. Package

of

Fasteners

containing

:

1)

16,

5/16-18 x 1/2 Short

Neck

Carriage

Bolts

"-

2)

4, 5/16-

18

x

3/4

Shorl

Neck

Carriage

Bolls

- 3)

10,

5/16·18 x 3/4 Hex Head Screw

.,...

4)

40, 5/16

Flat

Washer

'-'5)

30, 5/16-18 Hex

Nut

v6)

4,

#10-24 x 3/4

Pan

Head

Machine

Screws

v7

)

8,

#10 Flat Washer

v

8)

4,

#10-24

Wing

Nut

,

9)

3,

318

Split

Lock

Washer

10)

3,

3/8

Split

Lock

Washer

11) "

Hex

Key (Allen Wrench)

G.

Owner's

Manual

" '

1-'

• I

CARTON

2,

TOOL STAND

v'

H. Left Side Panel (with

switch)

v J. Right Side Panel

./

K.

Top Panel

.,..

L.

Support

Rails

(2)

~

M.

Motor

Mount

Support

Rails

N.

Motor

Mount

• O. Brace

If any

parts

are

missing

,

do

not

attempt

to

assemble

the

jointer

/

planer

untit

the

missing

parts

are

obtain·

ed and are

installed

c

orrectly.

Apply

a

coat

of

automobile

wax

to

the

tables

.

Wipe

all parts

thoroughly

with

a clean,

dry

cloth.

WARNING:

For

your

own

safety

, never

connect

to

power

source

until

all

assembly

step,s are

complete

,

and you have read and

understand

the

safety

and

operational

instructions

.

ASSEMBLING TOOL STAND

1_

From

among

the

loose

parts

,

find

the

following:

6.

Place

chip

chute

(No

. 104) on

top

flange

of

motor

Assem

ble

as

described

herein leaving

all

fasten·

mount

(No

. 103) and

attach

under

the

top

panel

ers

loos

e

until

instru

c

ted

otherwise.

and

motor

mount

stiffener

through

two

remain·

ing

holes

in

motor

mount

stiffener

and

top

panel

2.

Assembl

e

top

panel (No. 83)

to

side

panels

(No.

fastening

with

two

each

of

(Nos.

107,86

& 87).

88

& 92) w

ith

eight

each fasteners (No. 85, 86 &

a.

When

a 1725 RPM

motor

is

used,

install

the

87).

Make

su

re

left

panel

with

switch

is

located

as

shown

on page 12.

motor

mount

(No. 103)

with

the

motor

mount

·

ing

slots

IOward

the

top

of

the

stand.

3.

Attach

sup

port

rails

(No. 91)

between

the

side

~nels

wit

h

eight

each

fasteners

(Nos.

85,

86

&

b. When a 3450 RPM

motor

is

used,

turn

the

7)-

motor

mount

(No. 103)

upside

down

with

the

motor

mounting

slots

toward

the

bottom

of

4_

Attach

mot

or

mount

support

rail (No. 90)

to

the

stand.

support

ralls (No. 91). Use

four

of

each fastener

7.

Attach

lower

flange

of

motor

mount

(No. 103)

to

(

Nos

_

86

& 8

9)

and

eight

(No

_

87)

_

motor

mount

support

rail (No. 90)

with

two

each

5_

A

tt

ach

the m

otor

mount

stiffener

(No. 105) to

the

(Nos.

89

&

86)

and

eight

(No_

87).

t

op

pa

ne

l (No. 83)

with

two

each

of

fasteners

8.

Tighten

all

fasteners

except

for

those

that

hold

(

Nos

. 108

,86

& 87)

in

the

holes

in the

ends

of

the

motor

mo

unt

stiffener.

the

top

and

bottom

flanges

of

the

motor

mount.

9.

Machine

pulley

guard (No. 82)

attaches

to stand

with

four

of

each (Nos. 60 & 84) and

eight

(No. 81

).

4

MOUNTIN

G

MACHINE

Place the machine on the assembled tool stand. The

front

side

of

the

machine

(the

side

with

the

"

AMT"

nameplate)

should

be facing the same side as the

switch

of

the

tool

stand.

On

the

end

of

the

top

panel

(the

end

closest

to

the switch), fasten the machine

down

with

two

mounting

bolts

(Nos. 106)

and

washer

(No. 107)

through

the

inner

slots.

Through

the

middle

slot

on

the

other

e

nd

, fasten

with

the

remaining

mounti

ng

bolt

and washer.

BELT

AND

PUllEY

The

machine

pulley

(2·5f8 dia. x

518

bore)

is

already

assembled

on

the

cutterhead

shaft.

If

the

shaft

on

your

mol

or is 1'2 dia

.,

use motor pulley sleeve (No.

70)

for

adequate

fitling

. Place

molor

pulley

key (No.

69)

in

slot

on

motor

pulley

" 0" (No. 71)

and

slide

on

motor

shaft

. Put

socket

set

screw

(No.

72)

in

motor

pulley. but leave

loose

till

after

pulleys

are atigned

properly.

Assemble

V-belt "C" (1/2 x

36)

(No.

68)

to

the

machine

pulley and

motor

pulley. To align the

motor

pulley

to the

machine

pulley, use a straight

edge.

If necessary

both

pulleys

can be moved in

or

out

on the

shafts

or

the

complete

molar

mount

assembly

can be moved in

or

out

to bring the putleys

into

alignment.

If

necessary, loosen the fasteners

that

hold

the

motor

to

the

motor

mount

and move

the

motor

up

or

down

until

correct

belt tension is

obtained. Correct

belt

tension

is

obtained

when

there is

approximately

1"

deflection

in the center

span

of

the

belt

using

light

finger

pressure. See

"O

PERATING SPEED REQUIREMENTS" for

co

rrect

pulley

selection.

ASSEMBLING

CUTTERHEAD GUARD

Assemble

the cuUerhead l;Iuard

assembly

"A"

(27)

Figure 1, to the

jointer

by Inserting the post

of

the

guard

assembly

down

through

the hole in the front

tabl

e.

A spring is

supplied

in the knob

assembly

that

returns the guard over the c

utt

erhead

after

a cut has

been made.

To

provide

spring

tension, turn the knob

"C"

(22)

Figure 1 to put

tension

on the spring before

inserting

the post. When

inserting

the post down

through

the

hole

in the front table, make sure the

spring,

enclosed

in the knob (21), engages the

slot

provided in

the

end

of

the post

"8".

If

spring

tension

is too

much

or

not

enough, remove the guard and

post and

adjust

spring

tension

accordingly

by rotat-

ing

knob

(22).

Fig. 1

5

Mounting Hole

The

cutter

guard provides

protection

over the cutter-

head. It

must

always be in place and

functioning

properly.

Check the guard to make sure

it

is

functioning

properly.

a.

Pass a 1/4"

thick

piece

of

wood over the cutter-

head between the guard and fence. The guard

must

return automaticalty.

b.

Open the

cutter

guard all the way

until

it

stops

and release it several times. It should

always

re

turn to

its

original

position,

FENCE ADJUSTMENTS

The fence is

assembled

to the front

of

the

infeed

table, as shown in Fig.

2.

The fence can be moved

across the table and can be

tilted

45 degrees

right

or

left

al any

position

on the table by means

of

the

dual-

control

handle

.

To

move

the fence

across

the table,

pull

the fence

adjusting

handle

"A" (66)

away

from

the

machine

until the handle body

"S

"

(64)

Fig.

2,

engages the nut

"C"

(65).

Loosen the nut "e"

(65),

move the fence to

the

desired

position

and

retighten

nut.

To

lilt

fence. move the fence ad

justing

handle "A"

(66)

in toward the

machine

to engage the

nul

"

0"

(62).

Loosen

nut

"0"

(62) and tilt the fence to the

desired

angle,

right

or

left

and retighten nut. When

tilt

ing fence past the

positive

stops

, the Slop

block

HE" (54) Fig. 2,

must

be moved

oul

at

the way.

The fence on your

jointer

features

positive

stops

at

the

most

used fence

positions

of

90 degrees and

45

degrees

right

and left. Check the fence

with

a squa

re

to

make

sure the fence is 90 degrees to the table. If

an

adjustment

is necessary, loosen set screw " F"

(58) Fig. 2, and turn the

adjusting

screw

in

or

out

against the

stop

block

"E"

(54)

until

the fence, is at

90

degrees to the table. Then

tighten

set screw "

F"

(

58)

, Check

the

positive

stops

at

45

degrees right and

left

and ad

just

if

necessary.

RAISING AND LOWERING TABLES

To

raise

or

lower

the front table, loosen

lock

knob

"

A"

(4)

, Fig. 3 and turn handwheel "

0"

(3)

Fig.

4.

When table is set at desired pOSition,

tighten

lock

knob

"A"

(4)

Fig.

3.

To raise

or

lower

the rear table, loosen

lock

screw

(4),

"

C"

Fig. 3, and turn handwheel

"8"

(3)

Fig.

4.

When

table

is

set at desired

position

,

tighten

lock

screw

"C"

(4)

Fig. 3.

To

adjust

the

outfeed

table "

gib

,"

loosen all three

gib

adj

usting

screws (29) and make sure the rear

table

lock

screw

(4)

is

loose

.

REAR TABLE AND

KNIFE ADJUSTMENTS

For accurate

work

in

most

jointing

operations, the

rear table

must

be

exactly

level

with

the knives at

their

highest

point

of

revolution.

This

means

of

course, that the knives

must

be parallel to the table

and

project

equally from the cutterhead.

1.

Disconnect

the

jointer

from the

power

source.

2. Raise

or

lower

the rear table as required, by turn·

ing

the rear table hand lever,

unt

il the rear table is

exactly

levet

with

the knives

of

the c

ulterh

ead at

their

highest

point

of

revolution.

3.

Place a

straight

edge on the rear table,

extending

over

the

culterhead

as

shown

in Fig.

5.

4.

Rotate

the

cutterhead

by hand. The blades

should

Just

touch

the st

ra

ight edge.

If

a

knife

is too

low

or

too

high

at

either

end, loosen the

lock

screws

in the

knife

slightly

,

shift

the

knife

until

it

jus

t

touches

the

straight

edge, and

tighten

the screws securely.

6

Fig

. 2

Fig. 3

Fig. 4

SHEl

STRA.IGHT f OC,(

METHOD

FOR

CHECKING

REA.R

TA.B

LE

ELEVA.HON

A.ND

KNIfE

A.

lIGNMENT

Fig. 5

After

the rear

table

has been set at the

correct

height, it

should

not

be changed

except

for special

operati

ons

and

afte

r sharpening knives.

If the rear table is

too

high, the result

will

be as

shown in Fig.

6.

The finished surface

will

be curved.

When

the

rear table is

too

low, the

condition

will

be

as

illustrated

in Fig.

7.

The work

will

be

gouged at the

end

of

the

cut.

As a final

check

of

the rear table

adjustment

, run a

piece

of

wood

slowly

over the knives for 6 to 8

inches

;

it

should

rest

firmly

on both tables. as shown

in Fig.

8,

with

no open space under the finished cut.

RfA

R

TA8lf

10

0

HIC;I-l

Fig.7

OPERATION

The

following

directions

will

give the beginner a start

on

jointer

operation. Use scrap pieces

of

l

umber

to

check

settings

and to get the feel

of

the operations

before attempting regular work. ALWAYS

USE

GUARD

AND

KEEP

HANDS

AWAY

FROM CUTTERHEAD.

PLACEMENT

OF

HANDS

DURING FEEDING

At the start

of

the cut, the

left

hand

holds

the work

/irmly

against the front table and fence,

while

the

right

hand

pushes

the

work

toward the knives.

After

the

cut

is under way, the new surface rests f

irmly

on

the rear table as shown in Fig.

9. The left hand should

press

down

on

this

part, at the same time maintaining

flat contact with the fence. The right hand presses the

work

forward and before the right hand reaches the

cutterhead it should be moved to the work on the rear

lab

Ie. NEVER PASS

HANDS

DIRECTLY OVER THE

CUTTERHEAD.

JOINTING

AN EDGE

This is the

most

common

ope

ra

tion for the jointer.

Set the guide fence square

with

the table. Depth

of

cut

should

be the

minimum

required to

obtain

a

straight edge. Hold the best face

of

the

piece

f

irml

y

against the fence

throughout

the feed.

JOINTING

WARPED PIECES

If

the

wood

to be jointed is dished or warped, take

light

cuts

until the surface is flat. Avoid for

cing

such

materia

l

do

wn against the table; excessive pressure

will

spring it

while

passing the knives, and it

will

spring back and remain curved

after

the cut is com-

pleted

.

7

JOINTING

SHORT OR THIN WORK

When

jointing

short

or

thin pieces, use a push

block

to

eliminate

all danger

to

the

hands. Two types are

shown in Fig.

10.

They are easily made from scrap

material.

REAR

TABLE

TOO

lOw

Fig.6

RtAR

TABLE

AI

CORRECT

HEIGHT

Fig

.8

Fig.9

....

_,

....•

Fig.

10

DIRECTION OF GRAIN

Avoid

feeding

work

into

the

jo

inte

r

against

the

grain

as

show

in Fig. 11. The r

es

ult

will

be c

hippe

d and

splintered

edges.

CORRECT

FHD·WITH

THf

GRAIN

Fig.

12

BEVELING

To c

ut

a bevel,

lock

the

fence

at the

required

angle

and

run

the

work

across

the

knives

while

keeping

it

firmly against

the

fence and tables. Several passes

may be necessary to arri

ve

al the desired result.

When

the

angle

is

small,

there

is

l

ittle

difference

whether

the

fence

is

tilted

to

the

right

or

left.

Ho

w-

ever, at greater angles approaching

45

degrees,

it

is

increasingly

difficult

to

hold

the

work

properly

when

the

fence

is

tilted

to

the

right. The

advantage

of

the

double'lilting

fence

is

appre

ci

ated

under

such

con-

ditions.

When

tilted

to

the

left,

the fence

forms

a V-shape

with

the

tables, and

the

work

is

easily

pressed

into

the

pocket

while

passing

il

across

the

knives.

If

the

bevel

is

laid

out

on

the

piece

in

such

direction

that

Ihis

involves

cutting

against

the

grain, it

will

be

better

to

lilt

Ihe

fence

10

the

right.

TAPER CUTS

One

of

the

most

useful

joinler

operations

is

c

uttin

g

an edge

to

a laper. The

method

can be

used

on

a

wide

variety

of

work.

Tapered

legs

of

furniture

are a

common

example.

Instead

of

laying

the

piece

on

the

front

table,

lower

the

forward

end

of

the

work

onto

the

rear table. Do

this

very

carefully,

as

Ihe

piece

will

span

the

knives,

and

they

will

take a

"bite"

from

the

work

with

a ten-

dency

10

kick

back

unless

the

piece

is

firmly

held

.

N

ow

push

Ihe

work

forward

as

in

ordinary

jointing.

The

effect

is

to

plane

off

all

Ihe

slack

in

front

of

the

k

nives,

to

increase

depth

,

leaving

a tapered surface.

The

ridg

e

le

ft by

the

knives

when

starti

ng the

taper

may

be

removed

by

laking

a very

light

cu

t

according

to

the

regular

method

for

jOinting,

with

the

front

table

ra

ised

to

its

usual

position.

Pr

actice

is

required

in th

is

operation,

and

the

begin·

ner

is

advised

to

make

trial c

uls

on

waste

materia

l.

Taper

cuts

over

part

of

the

length

and a

number

of

other

special

operations

ca

n

easily

be

done

by the

experienced

craftsman.

B

WRONG

FHO

·AGA.INSr

THE

GRA.ING

Fig.

11

Feed

with

the

grain

as in

Fig

. 12

to

obtain

a

smooth

surface.

CUTTERHEAD MAINTENANCE AND REPAIRS

After

considerable

use,

Ihe

knives

will

become

dull

and

it

will

not

be

possible

to

do

accurate

work.

Unless

badly

damaged

by

running

into

metal

or

other

hard

material

,

they

may be sharpened as

follows:

WHETTING KNIVES

DISCONNECT THE MACHINE FROM POWER

SOURCE. Use a

fine

carborundum

stone;

cover

it

partly

with

paper

as

indicated

in Fig. 13

to

avoid

marking

the

table. Lay

the

stone

on

the

lront

table,

lower

the table

and

turn

the

culterhead

forward

until

the

Slone

lies

flal

on

the bevel

of

the

knife

,

as

shown.

Hold

the

culterhead

from

turning

,

and

whet

the

bevelled

edge

of

the

knife,

stroking

lengthwise

by

sliding

the

stone

back

and

forth

across

the

table

.

00

the

same

amount

of

whetting

on

each

of

the

three

blades.

OILsrONE p"'RrLV

WHETTING

~NIV~S

Fig

.

13

CUTTERHEAD REPAIRS

The

entire

cutter

head

assembly

may

be

removed

for

cl

eaning,

bearing

or

blade repl

acement

or

any

other

cutterhead

maintenan

ce

procedures.

To

remove

it

,

lower

both

feed

tables

to

clear

the

c

ulterhead

.

Re-

move

the

bearing

retaining

stud

hex

nuts

(Part

No

.

17

) and remove

the

entire

culterhead

assembly

,

with

bearings

,

studs

and

bearing

housings.

When

reo

installing

the

assembly,

be

sure

the

machined

curved

seats

of

the

base

casting

are free

of

dirt,

dust,

grease,

etc.

to

obtain

a

good

tight

fit.

BLADE CARE

When these blades become

dull

enough so that it is

noticeable when

cutting,

they should be resharpen-

ed. A sharp blade

wo

rks easier and results in longer

blade life. The penalty paid for a

dull

blade is less

blade

life

and

greater

wear and tear on all parts

of

the

machine

.

When

the

knives cannot be properly

re

-touched as

described in "Whetting Knives

,"

they must

be

ground and re-surfaced to a new bevel edge. Check

in the "Yellow Page

s"

of

your local phone

AMT 4121 Owner's manual

AMT 4121 Owner's manual

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