Carlton Machine Tool Model 1A Operators Manual Drill, Radial

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OPERATOR

MANUAL

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OF

IA

MooELS

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CARLTON

CINCINNA

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MACHINE

TI

25, OHIO

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TOOL

CO

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Table

of

Contents

AMERICAN NATIONAL

BASIC THREAD DIMENSIONS

FORM)

COUNTE RBORE SIZES

DECIMAL EQUIV A LENTS . . . . . . . . . . .

DRILLING SPEEDS

HANDLING

LEVELLING ..............

..

............

AND

CHECKING.....................................

PIPE

THREADS ............... ............................. 21

AND

...................................

FOR

AND

........ .

AND

CAP SCREWS

FEEDS....................

........................... ....................

TAP

..

. . . . . . . . . . . . . . . .

DRILL SIZES (NC) ..........

DRILL SIZES

DRILL SIZES (SPECIAL

........

................................

AND

MACHINE SCREW

.. . ..

. . . . . . . . .

......................................

(NF)

........ .... 21

..

. . . . .. . . . . . 11

...

......................

.................. .

S 23

and

..

20

22

12

16

3

LUBRICATION . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION CHART . . . . . . . . . . . . . .

METHODS

OPERATION

REAMING HINTS

STARTING

SUGGESTIONS

TABLE

OF

POINTING AND THINNING DRILLS.........................

OF

THE

MACHINE. ...... ................................................ 9

.. ..

.... ...... ..................................................................

THE

MACHINE............ ....................

FOR

REGRINDING DRILLS.... .. . . . . . . . .

OF

CUTTING SPEEDS (DRILLING

..

. . . . . . . .. .

..

. . . . . . .

..

. . . . . . . . . . . . . . . .

..

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AND

..

. . . . . . . .

...

.............................. 4

.. ..

. . . . . . . .

BORING) ....

..

. .

..

. . . . . .

...

..

. . . . . . . . . . . 5

...

..

....

.. . ... . 17

13,

14

an<l

4

18

19

15

ndlin

and Checking

You, a, lton Raclial ough I that hos tainecl h) yon, plant. cratt>d dition.

Th

tr~l<'cl

hef ore lt>aving the

ht>t'n

built into this machinP can

careful

The

:so

it

will r •ach its

mnrhine

can be removed from th

Drilling

hanrlling while ma hin was

destination

Machin has been thor-

fa

tory.

Th

accuracy

only

he main-

it

is h •ing s t up

ar

fully

skidded

in

perfect con-

truck

or

and

flat

r weather while the

lo

in

and the

then recommend with a clean oil

ady

lo h cleaned.

rover

wrappings.

grca

tandard

Ito!'~

\'v-~'1~,

To

machine

all

of

the exposed finished

After

the

can be washed off the

solvent

l>,!!,9WP

11\.\\\\

C.0

G,

that

\.11

such as

the

similar

!:')

!l

,o

arm

to

insure

wrapping

protection

is in transit, it is necessary

parts

has been removed

machine

gasoline

and

what

or

column be

is

called

from

with

kerosene.

lubricated

out

the

grease

any

We

on the

I

I I I

I

car by the use machine is sh be placed bars

and the desired location. The receive a removed easily

T he nex t st

check car

pa

rt

s being broken th rough

If there

any

to no

been thoroughly cleaned of slu sh

After the machin e is

pa rts shi

tif

y yo

Do not move

of

a sl

ing as

shown in Fi

ipped

in a closed conveyance, roll

under

the sk ids and then by the use

block

and

Lackie the mac hine can be rolled to

depressions

standard

efu

appears

ur dea

jack

foot, so that the skids can be

and

then levelled

ep

to take is to remove the wrapping and

lly for the possibi lity of loose parts, or

roug

to be

any

dam

pped

in con

juncti

ler imme

th

e he

diat

ad

in

ely.

on the

the pe

gure

l.

If the

ers

can

of

pry

in

the base will

proper

ly.

h han

dlin

g in

tran

sit.

age

to the machine or

on with the machine,

arm

until the

and

then

rmanent position, it is

arm has

lubri

cated.

ST

E.E.

C l

Figu re 1

io

lubricat

n chart,

for

use in the head.

LeveHing.

Wh en th e ma chine has been cl

uld

position, it sho

It is of the utm ost import

2. at

all

times. When the machi ne was assembled at the factory the base was leve Wh en levelling tolerance should be maintained. Use a high grade precision s Fig con placed on a woo den Aoor we recommend plac s

pirit

ur

e 2. If wedges a re used, the base should be on a

cre

te Aoor. If shims are used

him

s on steel

be levelled in accordance with Figure

ll

ed to within

th

e base in your Factory

level and fol low the proce

plat

es no less

eaned

ance

that the base is leve l

dur

and

than

½" thick and 4" x 6"

an d placed in

.001"

per foot.

that

sa me

e in cluded in

the machine is

in

g the

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~RM

long.

For

the best machining res ults it is

the wedges

If

tioned above, you will encounter many problems when operating the machine.

arm will tend to

the clamped position. base that is low. Secondly the sp indle will not be square with the base causing the holes to be out of workpiece.

If

cates, the chances fo r vibration will be tion will cause the tool to get dull much faster than it would solidly. The finished surface in the holes chined will not be smooth be inferior. structions the letter.

We crete. foundation, levelled and then bolted down, the machining resu lts will be satisfactory.

are

placed in all the positions show

the machine is not level within the toleran ces men-

First

there is a

drift

when the co lumn is in un-

It will

square

the machine is not

if

the machine were s

It

is therefore very

for

levelling the machine

do not recommend

drift

toward the side

with the machined surfaces

suppo

rted as the drawing indi-

upport

and

the work in general wil l

important

grouting

If the machine is placed on a good so lid

and

suppor

ted as recommended,

important

probability

that

are

incr

eased. Vibra-

ed

properly

that

that the in-

are

followed to

the machine

that

n.

that

of

drilled

of

and

are

ma-

in

con -

fl

oor

the

or

Lubrication.

Figure 3 show s the lubrication c

Drill.

Radial

Every point of lubrication is noted on

hart

of

the Carlton

this c

hart

along

with the type of lubri cant to use unit. With the exception of the head and unit the in place. before operating the machin e.

should be put in the hea2 line shown on th e sight gau ge. After the main dri motor is s practically empty. However, do not refill the head with oil because c

ir cause the head to leak o over night.

is enough grea e in the column bearings that no

be th grease will work between the inner and outer clamping surfa cess greased any more than every six months.

Starting the

After th e ma chine has been cleaned, levelled, lubricated machine startin g the machine i to check th direction

ma

chine is

It

We want to ca

tart

of

culated

Sin

ese bearings can prove to be troubl esome, because the

thr

ce

there is no visual means of knowing when there

mor

e than two or

applied

iv

at

ely when clampin g. The e bearings should not

shipped

will be ne cess

ll

special attention to the head. The oil

ed the o

this conditi on, becau e the oil is being

ough the head

each fitting. To get too much grease in

ces and cau e the column to

with the

ary

--:

1til it comes up to the level

il

leve l will go down until it

and

il

when the ma chine sets idle

thr

ee pumps with a grease gun

proper

to

fi

11

these two units

to refill it would only

Machine.

and

power attached, the next tep is tarting the

for

production. The first thing to do when

ere

lubrication

we

recommend

"jump"

in

co

of

each

drive

ve

lumn

ex-

be

th

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motors motor fore l run run in the co with AC mot run conne

that control s on th e ma hine were checked eav

ing the factory,

in

the ri ght

ors

backward simp

ted to the machin e

the

direction all of

rr

ect

dir

e lion. If the mac

and contro

ly reverse two

various operati

and

l,

at

if

the

and

the

the base

for

main

othe r

main

of

the lines

of

hine

the column.

ns. A

11

of

dire

ction be-

driving motor

motors wi is e

quipped

driv

e mo tor

that

the

are

ll

The v:-

riou

el

ectrically by

pu

hbutt

ons

the fun ction

plate.

We sugge

to

make sure

performin

machine

g co

is

s functions

means of are loca of

each

st

that

rrectly.

ready

to

ted on pu

each

all

of the

operate.

of

th machin e

motors and

eac

hbutton

of

units that

After

this has been

h side

is

marked

the

pu

are controll

pus

hbutt

ons.

of the h

hbuttons are

they control

ead

on the

done

The

nam

tried

ed

and

e-

are

the

E

LECTR

COLUMN CLAMPING

MAIN DRIVE MOTOR

HYD.

OIL

GAGE

IC SWIV

SHAFT

\

EL

COLUMN CAP

ELEVATING

SCREW

I

COLUMN

CLAMP

OUTER

COLUMN

------------------------

Photo 4

SERIAL No.

RM CLAMP & ELEVATOR

A

6

------------------------

LEVER

BASE

ELECTRICAL

TO

LINES

ARM

I I

I

TRANSMISSION

ARM

ELEVATOR

CROSS

CONTROL

DRIVE

BOX

I I I

Photo 5

7

LEVERS FEED

&

DIRECT

READING

FOR SPINDLE

FEED

PLATE

DIAL

LOCK

I

SINGLE ALL SPINDLE

SWITCH FOR BUILT

LEVER

CONTR

FEEDS

DIRECT

READING

PLATE FOR SPINDLE

IN

LIGHT

SPINDLE

TWO

LEVERS

ALL SPINDLE

CONTROL

SPEEDS

POWER

OR

HAND

FEED

SELECTOR

START-STOP LEVER

CLUTCH FOR

HAND

TAPPING INTERLOCK

FEED

REVERSE

HAND TRAVERSE

GRADUATED DEPTH

DIAL

WHEEL

HANDWHEEL

--------------------

Ph

oto 6

8:

------------

--------

__ ,

I

Photo

Cl

,l1<rn

. a \i<'\\ of llw

lc\rl

ancl

flll

hlnlllnns

anrl

f1111rlion.

,ti tlw !wad ,1ill1

lln

1h,·

tlw

rol1111111

nwnn . lliat

rol1111111

th""'

t\\o

arli,·ll'.

~turtinµ

lt·1rrs lo

are

d,•,i;rnaled. Tlw~I.'

"Co\\

llorn llandll.'s". ,rrtiral Thr,

al. o

drillinf(

pull

thr

then feed

The

nrxt mounled 1hi

.·

Iner. tained. rrrnlulion

.020"

and

hy

the

determine

Below provided run

gi,en

all

of

the machine.so to

the

one recommended search.

tool,

number

under

those

Adjacent pushbullon starts

and

The

the

drill

spindle

three

speeds

The

peed

tion

each

flt,·

"l"'rnlinn

llw

'1"

rolnnm

rlamp

thr

rol11m11

at the

n•;ir

lt·1rrs

will

at 1he

11p111•r

en;rage

the F1•

tra1el

of

the

arC'

11srd

to

undC'r

power.

le"crs

fornarrl

under

power

lr\'er

pointed

directly

On a standard

lever

the lo a. si. t

taking

spind

speed

speeds

time

in

six

geared

of

the

spindle

.02(1''.

The

multiplied

the

rate

of

feed

dial

you

sizes

of

drills

peed:

on

it will be neces ,

referred

by

the

into

of

holes

conditions.

to

the

feed

for

the

stop

the

le

speed

chart.

in

and

the

plate

is a

the

-------------------------

'P

or,·

mr11krd In

,.

,,

plinn

l \

tvpc

is

1101

incl11clrcl a,;

rlnmp

of

thr

lw

rxplaincd

left

hand

rd

and

le11.'r. are

Thpse

spindle.

cngage

To

en11:age

until

when

the

out

front

of

and

selecti,

machine

are

feed

that

by

the

penetration

is a

to

determine

in a

thi

chart

aryto

to on

the

drill

manufacturers

consideration

per

grind

dial

Main

Driving

motor

that

change

These

two

the

head.

inner

direct

reading

inner

le\'er

,ration

)1Pnrl.

\II

of

tlw

sho\\

llwir

of

1111·

mnchinr

of

1111•

111ac-hi111•

IP,Pr

marhinr.

,-ide

Quirk

rommonly

two

handles

when

1he

power

the

they

stop.

spindle

is

the

Feed

the

Feed

·e

power

the

rates

.006"

..

is

indicated

RP:\I

of

speed

chart.

the

gi\'en

material.

are

not

select

chart.

the

and

drill

Motor.

dri\'e

levers

The

outer le"er

le\'er

change. four

plate rhan

is s

hifted.

i,

arm 1·l1•,a1inf(

tlw

pn,ht.1111011

st,rndard

is

mounted

·

nil'

operation

further

of

lhe

Beturn

known

operated

feed

clutch

power

feed

The

spindle

starts

Chang-e

Dial.

feeds

of

feed

008"

..

011"

of

the

spindle

the

dri

11.

This chart

correct

contained the

speed

These

after

efficiency

the

life

speed

The

the

pindle.

are

located

control the

E\'ery

of

oprratinf(

lnrnlinn

ro111rnllcrl

lc,cr.

which

on

in

Photo

(1

the

'pindle

as

control

manually.

when

clutch.

will

to

rel'ol\'e.

Le\'er.

By

turning are

per

..

015".

on

the

dial will

speed

Of

course.

in

closest

speeds

much

of

the

chart

is

pushbullon

below

twelve

changes

speeds.

ging

posi-

speed

tli

llw 11hir·li rc·,·olw

silio,wd

for

the

of

this

the

the the

ob-

one

1s

to

the

are

re-

the

tool

the

on

lnad1·d tlw

To

light

The

right

an

position spindle

position can on

The Le\'er. engaging anism. a

brake bring trepanning produce an be so

The corner

fine anism out ran drilling

re,

·o h·e that feeding

The

column

This

"CLAMP". on diameter column a

9"

on

The

of

9

-------------------------

Machine

platr

is rParl

points

11lwn

lo a

hall

i11rlex

hushing.

the

left

switch

Power

of

the

" I

N"

and

will

and

he fed

,ertically

the

lower

the

When

provided

it

to a stop.

the

ideal

arrangement

eased

into

that a sudden

Feed

of

the

hand

feeding

through a wormshaft

clutch

be

disengaged

at

at a rapid

the clut

hy

pushbutton

is

pushbutton

the

l A

diameter column a Hand

the

column

Hand

the

head.

frnm dirPrll) spindle

drfinitr

dropping

of

that

or

sp

"O

the

feed

the

right

le\'er

le,·er

frictions

the

job

slo"er

the

Handwheel

head.

pro\'ided

high

ch

hand.

mounted

These

marhine. that

Travers<' \X'heel is

By

thP

turns

Hand

ed

change

T" po.

cow

under

row

hy

hand

shown

controls

le\'er

that

For

the

frictions

speeds

hole

reversal

This

and

in when

speeds

rate

be

disengaged

for

slation

pushbuttons

.

If

at

the

turning

to llw "llf'f'rl

is sPt in

lof'alion

inlo

speed

the

horn

turning

in

is will

for

and

is

the

on

tbC'

rear

lA

thr

inrlir-ator

one

change

light

Feed

~elertor

le,ers.

ition. \X"

horn

handles

po,1er.

handles

side

of

is

the

1he

rotation

the

forward

positioned

slow

the

occasional

can

that

tapping

then

will located handwheel coupled

and

center

feeding

and

feeds

of

speed.

clamping

the

is

marked

are

lA

marhine

of

the

on

thal

motion.

of

at

the the

are

not

at

right

Clamp

wheel

Fach

hv

mt>ans

thr-

i11rlenls

le,ers

the

spindle

is

This

lever

hen

placed

are

When

placed

eng-aged

small

head.

Start-

of

and

in

do,1n

he

slipped

required.

into

steel.

reversed

break

at

the

j,,

up

to

11orm.

of

thi,,

under

this

so

it is

all

times

and

side

"U

are standard

furnished

is

Lever

machine.

located

clockwise

thP

oulcr

the

spindle

IP,·

er

of a spring

pro\'ided

is

located

on

located

indicates

in

the

engaged

in ·

the

feed

handwheel

top

and

the

spindle.

re,·erse

Neutra

I.

the

spindle

large

boring

in

This

The

s1011

ly

the

tap.

lower

right

used

mostly

the

feed mech-

There

i;, a pull

handwheel

power.

handwheel

recommended

except

unclamping

of

the

CLAMP-'

equipment

with

furnished

is

on

the

right

the

lrver

will

is po-

the

and

off.

to

the

'·IN''

the

'OUT"

spindle

Re\'erse

by

mech-

there

and

or

order

is

also

tap

can

enough

hand

for

that

\'\

.hen

will

when

the

head.

and

an

11"

with

mounted

side

head

in

to

is

to

wil l !'ravers in toward lh column. The hand! is pro-

vided for obtained by grasping the rim of ing th whee l forward can be located on the e act spo

Above the traverse handwheel is the Head Cl Leve drill up as lever a s lever

The Graduated

a

djacent to the co w depth, move the workpiece.

drilled is

h

ead the depth dial in position with the lockin g h

gage the feed clutch,

tion predetermined depth is reached

the feed c

The

rotating head

are clut ch can not be engaged diffe rent rate

produce its own l the work when the spindle is reversed.

The

located on the side

fa t trave l and

r.

Thi s lever clamps the head to the

has been located.

far

as it will

li

ght

tap

wi

11

fa] I into an un cl

Depth Dial and

drill

Turn the dial until the

dir

ectly opposite the "ZERO " on the

in which the co w h

and

the

drill

will

lut

ch.

Tapping Interl

and

is

in work in the machine. When this is don e the feed

of

feed than the

ead

Arm

Elevator

th

e final or close location is

the wh

or

reverse, the spind le

t.

To

cla

mp the head, pu sh the lever

go.

To uncl

with the hee l

horn

down until the point tou ches the

orn

star

penetrate

ock is

turn

ed

into

is con

of

the arm

amp the head, give the

amped

handle

handl

t the spindle in

the workpi ece until the

and

pla

ced in the cen ter of the

90°

when

and

tap

the work

trolled

near

el and by in c

and

arm

after

of

the hand

position.

Clamp

s. To dri

desired dep

es are mounted. Lock

auto

matica

tapping operations

feed the sp

lead. The

and

then back out

by

the lever

the co lumn .

and

for thi s dial is

11

to a given

th to be

rotating

and

forward

lly

indle

tap

dri

amp

le. En-

dir

release

at

that

Thi

h-

the

ec-

will

of

lever a lso controls lhe cl arm

lo the column. As long as the lever is in position the the arm , pu sh the lever up as

ll

automatically cal switch that

the

arm movi

is reac hed, place the lever in neutral position

arm will

arm

the the

arm

In

order

the workpiece

ever location

the column upon which the unclamp When the pushbutton c ni

shed on the

the column th e column . To until

it

ing

bush. When cla

down as

lever so there will be no tendency to move the

of

the

locatin g a

a

not

unclamp

far

enoug

dra

g. The

is

column can then be c

s

movin g the dri

arm

unclamp

co

ng up the co lumn. When the desired heig

stop and be cl

, pu sh the lever dow n as

wi

11 move

to positi on the drill in different locations on

it

th

at

ed then

indexes

spo

eas

lA

for

the

unclamp

into

far

as

it

t because

drill

the column all the way. Release the lever

h to allow th e column to

drill

11

off

ampin

g and un cl

is cla

mped

to the co lumn.

s the

arm

ntrols th

in the down

is nece sa

is in need

type machin es, a lever is

purpo

or

can be located very close

e elevating

amped

directi

ry

to swing the

of

arm

ily moved in th e desi red direction .

lampin

g a

se

of

clamping and

the column,

the slot th

mpin

will go.

of other

of

the spot.

at

g the column

Push strai

the side pu

tool s to very close

lamped

amping

far

as

it will go. Thi

and thro ws the electri-

motor and s

to the column . To lower

far

as it will go

on.

drillin

g. Thi s means

is mounted h

rran

gement is

pull

is

milled

push

ght down on the

11

on the lever. When

turn

without mu ch chance

of

the

neutral

To

rai se

tart

hth

and

the

and

arm

to what-

that

as

to be

not

fur

provided

unclamping

the lever

in the clamp-

with a

on

up

the lever

drill

off

limits

do

slight

and

the

of

s

-

Drillin

-----------------------

g,

Tapping

in

On

, Re

aming, Boring

e

Se

tup

and

Counter/w

with a Double Trunion

10

-----------------------

ring Six

Fixture.

Fac

es

Drill

80

79 78

77

76 75

74

. .

73 72 71

.7

70

DECIMAL EQUIVALENTS

Diam

.

Inches

.078S .0787 .0810 .0820

.0827

.0860 .0866

.0886

.0890

.0906

.0935

.0937

' .0945

.0960 15 .0980

l/44

.s

6 m'

~

"l•

Diarn.

Inches

.0135

• 0145 .0156 .0160 .0180

.0197

.0200 .0210 .0225 .0236

.0240 .0250 .0260 .0276 .0280

Drill

47

2 .

46

4S

2.1

44

2.2

2.25

43

2.3

42

2.4 41 40

%2

'¼

'"

m;. mm

"):0

")',,

OF

Diarn.

")~

"l•

:.

~{,,

"}i.

;.

"}

{n

Inches

.1S90 .1614

.16S4

.1660 6.4

.1673

.1693 F

.1695

.1719

.1730

.1732

.1770 .1772 H .1800 .1811 6.9

Drill

21 20 .1610

4.1

4.2

19

4.25~

4.3

18

11/44

17

4.4

16

4.5 m

4.6

REGULAR SIZES

"}{,,

E

")!.

II}{.

G

")

7/44

m.i,,

~;,,

Diam.

Inches

.2461 .2480 .2S00 .2S00

.2520

.2559 .2570 .2598 9.4 .2610

;.

.2638

.2656 .2657 .2660

:.

.2677

.2717

Drill

T ,3S80

9.1

~

23/44

9.2 m

',,

")

11

9.25

9.3

~

u

ay

.,

")

m

9.5

3/s

V

"):0

9.6

9.7

m,. "){,,

9.75 "){,,

9.8

Drill

6.2S

6.3 ' "

¼

6.5

6.6

6.7

l

6.75

6.8 }

Diain.

Inchea

.3S83 .3594 .3622 .3642

.3661 .3680 .3701 .3740 .3750

.3770 .3780

.3819 .3839 .3858

I I

69

.75

68

%2

.8

67 66 65

.9

64 63

62 61

1.

60

59 58 57

1.1

56

3/44

1.2

1.25"){,,

1.3

55

54

1.4

1.5

53

1

/15

.0292

11

. 0295

{.

.0310

.0312

");.

.0315 37 .0320

.0330 36 .0350 .0354

~

.0360 .0370

.0380 .0390 33

.0394

~

.0400 32

.0410 3. .0420 .0430 .0433

'¼

.0465

.0469

•{.

.0472

.0492 3.3

.0512

~

. 0520

.OSSO

.0551 28 .1405

~

.0591

~

.0595

.0625 27

2.5

39

38

2.6

2.7

2.7s

7/44

35 .1100

2.8

34

2.9

31

3.1

1/s

3.2

3.2S");.

30

3.4

29

3.5

9/44

3.6

.0984

")

m

.0995 .1015

"):.

.1024 .1040

II\;.

.1063 .1065

m;,,

.1083 .1094

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.1102

.lllO

.1130 8

")

in

.1142

.1160 7

.1181

'¼

.1200 6 .1220

~

.1250 s .2055 7 .8

.1260

")'II

.1280 5.3

.1285

'¾.

.1299

"){.

.1339 3 .2130 .1360

"}{.

.1378 .1406 2 .2210

"){.

.1417 .1440

14 13

4.7

m;,,

4.75mm

3

/26

;,,

4.8 m 12 11

4.9

")

{n

10

9 .1960 7.4

")in

s.

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5.1

13/44

m;.

5.2

o/m

5.2S

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4

5.4

'¼

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1/32

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5.6

"l',,

5.7

5.75")',,

.1820 .1850 7 . .1850 J .2770 .1870 .1875 K

.1890 .1890 .1910 .1929 .1935

.1968 .1990 7.5 .2008 .2010

.2031 N .3020 12. .2040 7.7 .2047

.2067 .2087 5

.2090 .2126 0 .3160

.2165 .2187

.2205 .2244

.2264

I 2720 w

m'

.2756

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;.

7.1

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7.2

7.25mm

7.3

L .2900

M

19/44

7.6

7.7S

7.9

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8.

8.1

8.2

p

8.25¾

8.3

21/44

8.4

.2795 10.

·.2810 .2812

mm

.2835 .2854 .2874

~

..

.2913 11.

")in

.2950

")

•!. .2953

.2969

"){,,

.2992

'%o

.3031

m,{,,

.3051 12.S .3071

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. 3110

o/

11

.3125 .3150

">•

"){,,

.Sl89

"),{.

.3228 .3230

.3248

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.3268 .3281 15.

.3307

o/•

9.9

10.S

11.S

13

13.5

14

14.S

11\

25/44

m;,,

X

y

\t'32

m;,,

27/44

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½s

m;.

29/44 1%2

"}in

31/44

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½

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.

3

¾,

17/Jz

m;,,,

35/44

.

'¼

9

/2s

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37/44

'¼

1%2

n,

{,,

.3860 .3898 m .3906 .3937 .3970

.4040 .4062

.4130 .4134 .4219

.4331

.4375 .4528 .4531 .4687

.4724 .4844 .4921

.5000 .5118

.5156

.5312 .5315 .5469 .5512

.5625 .5709

.5781 .5906 .5937

1.6

52

1.7

51

1.7S~

50

1.8

49

1.9

48

- - - - -

S/u

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~

.0635 .0669

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.0670 25 .0689

.0700 .0709

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.0730

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26 .1470

3.75")',,

3.8

24 .1520 6.

3.9

23 .1540

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.1457 1 .2280 .1476

.1495 .1496

'1/•

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~

.1562 C .1575 D

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Reproduced

----

5.8

5.9

6.1

6.2

by

pe

rm ission o f The Clevel a

-

--

")',,

~

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~

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.3320

.3346

.3386 .3425

.3437 .3445 .3465

.3480 .3504 .3543

--

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'¼

.2323

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A . 2340 R .3390

15/44

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~

.2344 .2362

.2402 .2420

.2441

.2460

11---

8.5

8.6

8.7

11/Jz

8.75'}{.

8.8

8.9

9.

nd

Twist Drdl Co.

---

0

s

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.6094 .6102 .6250 .6299 .6406

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- - -

39/44

15.5

5/s

16 .

41/44

16.S

21/32

17.

43/44

t 1/26

17.5

-

----

DECIMAL EQUIVALENTS

Diam..

Inches

1.1875

1.2008

1.2031

1.2187 l

1.2205 43.5'¼

"'"'

1.2344

1.2402

1.2500

.,

.•

1.2598

1.2656

Drill

42.5m111/26

43.

123/32

44.

147/44 l¾

44.5,-

Drill

45/44

18.

~

23/32

18.5.,_

47/44

'lin

19.

¾

49/44

")/n

19.5 25/22

Diam.

Inches

.7031 .7087 30.5'"• .7187 .7283

.7344 .7480

.7500 .7656 .7677 .7812

Drill

ll/26

113/44

1%2

31. 115/44

31.5•./4, l¼

32 .

117/44

OF

'I•

45/44

·-

REGULAR

Diam.

Inches

1.6732

1.6875

1.6929

1.7031

1.7126

1.7187

1.7323

1.7344

1.7500

1.7520

Drill

ss

11

• r,

211/44

55.5"}'. 23/26 21%4 2.2031

56.

'¼i

27/32

56.5"'·m 216/64

57.

SIZES-continued

Diam.

')Ii

'

Inches

2.1654

2.1719

2.1850

2.1875

2.2047

2.2187

2.2244

2.2344

2.2441

Drill

221/32

67

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243/44

68.

'¼,

1

2

½6

88.5'¼,

245/44

69 .

.,_

22312

24

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Diam.

Inches

2.6582

2.6575

2.6719

2.6772

2.6875

2.6988

2.7031

2.7165

2.7187

2.7344

20.

~fu

51/44

20.5•13/21

21.

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21

21.s-.

55/44

22 .

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1/s

22.s-,. 57/44

23

.•• 29/32

59/64

23.s,. 15/26

24.

•111

61/44

24.s•. 31/32

25

....

63/44

1

25.S~

11/44

26 .

.,.

ll/32

26.s.,.,

.7874 .7969

.8071 .8125 .8268

.8281 33.5')• .8437 1 z

3z

.8465 .8594

.8661 .8750

.8858 .8906 .9055 .9062

.9219 .9252

.9375 .9449 . 9531

.9646 .9687

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.9843 11%2

.9844

1.0000 l.0039

1.0156

1.0236 l.0312

1.0433

32.5.,_ 1.2795

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l.28li

1.2969 l.2992

1.3125

19/¼ 119414

33 .

5

1

1.3189 46.

1.3281

1/44

34 .

.,.

l.3386

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34.5¾

12~4

131

3S. •., 1.3780

1.3437 46.5'¼, 1.8307

1.3583

1.3594

1.3750

1z51s4 l.3906

l.3976

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l.4062

l.4173

l.4219 l.4370 l.4375

1.4531

l.4567

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36.s~1½6

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1

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1.4764

1.4844

1.4961 l.5000 l.5156 l.5157

1.5312

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38 .

11/: 13i/44

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45.

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2

1

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127/32

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l

55/44

47.S~ 13/a

48.

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157/44

129/32

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50.5~ 2

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1.7717 57 .5'¼, 2.2638

1.7812 l.7913

1.7969

1.8110

l.8125

1.8281

1.8437

1.8504

1.8594

1.8701

1.8750

1.8898

l.8906

l.9062 l.9094 l.9219

•

1.9291

1.9375 l.9488

1.9531

1.9685

1.9687 l.9844

1.9882 63. ~ ...

2.0000

2.0079

2.0156

2¼ 217/44

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58.

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58.5'1!.

5

2

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59.s•. 1

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61.

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2.2500

2.2656

2.2812

2.2835 70.5'¼,

2.2969

2.3031

2.3125

69.5,'m 2.7362

~

2.7500

2.7559

2.7656

2.7756

2.7812

2.7953

2.7969

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70. 2•9/44

225/32

71. ¾ 251,/4

2.3228 211/i! 2.8125

2.3281

2.3425

2.3437

2.3594

2.3622

2.3750

2.3819

2.3906

2.4016

2.4062

2.4213

2.4219

2.4375

2.4409

2.4531

2.4606

2.4687

2.4803

2.4844

2.5000

71.S'¼i 253/44

72. 227/32

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73.

23/i 2s¥/4

73.51\fu

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74.

5

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74_5.,_ 215/26

75.

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75.5'111

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2.8150

2.8281

2.8346

2.8437

2.8543

2.8594

2.8740

2.8750

2.8906

2.8937

2.9062

2.9134

2.9219

2.9331

2.9375

2.9528

2.953)

2.9687

2.9724

2.9844

2.9921

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29.5~•

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30.

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------------------

l.0469 l.0625 l.0630 l.0781

1.0827

1.0937

1.1024

1.1094

1.1220

1.1250

1.1406

1.1417

1.1562

1.1614

1.1719

l.1811

39 . .,.,

135/44

39.S~m 19/16

40.

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137/44 11%2

40.sm. 139/44

41.

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42. 121~2

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1

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1.5354

1.5469

1.5551 2364

1.5625

1.5748 l.5781

1.5937 l.5945

1.6094

1.6142

1.6250

1.6339

1.6406

1.6535

1.6562

1.6719

Reproduced

by

pcrm1ss1on

SI.Sm.,

21~2

52.

~

2½6

52.5"){. 2%,

53. ~ .. 2%2

s3.s~.

27/44 21/s

54. ~29/44

54.Sm., 2%2

2.0276

2.0312

2.0469

64.

2.0472 64.s~;.

2.0625

2.0669

65 .

2.0781

2.0866

2.0937 65

2.1063

2.1094

2.1250

66. ~-

2.1260 66.5~;.

2.1406

2.1457

2.1562

of The

Cleveland

12

------------------

67.

Twist Drill Co,

33

2

1

2 235/44

9

2 237/44

.S")l.

21%2

/44

~-

%z

.,.

/26

2.5156 3

2.Sl97

2.5312

2.5394

2.5469

2.5591

2.5625

2.5781

2.5787

2.5937

2.5984

239/44

2.6094

2.6181

'""

2.6250

2.6378

2% 241/4, 2.6406

3%2

3½1

33/22 3¼

3%2 33/16 3·%2 3¼ 39/22

5

3

/16

311f.J 3},

3

116

3½

2

3.0000

3.0312

3.0625

3.0937

3.1250

3.1562

3.1875

3.2187

3.2500

3.2812

3.3125

3.3437

3.3750

3.4375

3.5000

F-

Minute

Dia.m

Inches

½6

¼

3

/is

¼

5/26

¾

½6

½

o/s

¾

3/s

1

11/s 11/4 l¾ l½

l¾

1 % 2

2¼ 2½ 2¾

3

3½

4

4½ 5

5½ 6

6½ 7 8 9

10

per

ter

30'

40'

2445

1833

1222

917

815

611

458

489

367

407

306

349

262

306

229

244

183

1S3

203

17S

131

11S 1S3

136

102

92

122 111

83

102

76

94

70

65

87

61

81

57

76

51

68

46

61

56

42

51

38

33

43 38

29

34

25

23

31

21

28

19

25

18

23

16

22 27 14 19 13

17

11

15

0 CUTTING SPEEDS

FRACTION SIZE DRILLS

60' 70

SO'

3667

3056 1S28

1833

1019

1222

764

917

611

733

S09

611

437

524 458

382

367

306 25S

306 262

218

229 267

191 170

204 238 272

153 183

167

139

153

127

141

117

131

109

102

122

115

95

102

8S 76

69

64

55 47

43 38 35 32 29

24 21 19

92 83 76

65 57

51 46 42 38 35

33 38 28

25 29

23

' 80'

Revolutions

4278

4889

2445

2139

1426

1630 1222

1070

8G6 713 611 53S 428 489 3S7

90'

S500 2750 1833 1375

978

1100

81S

917 786

698 611

688 764

sso

407 458

306 349 393

344

306

306 340

214

244

27S

194

222

2S0

178

204

229 212

188

165

153

175

196

143

163

183

134

153 172

119

136 153

107

122

137

97

111

125 139

89

102 115 127 140

76

87

67

76

60

68

54

61

49

56

45

51

41

47 44

33

38 34

27

30

100'

per

Minute

6111

3056

2037

1528 1222

1019

873

611 509 436 382

306 278 255

235

218

204 224

191 170 153 168

109

98

86

95

76

85

69

76

62 69

57

64

53

59

49

55

43

48

38

42 47

34 38

110'

120'

6722

7334

3361

3667

2241

2445

1681

1833

1345

1467

1120

1222

960

1048 840 672 S60 480 420 373

336 306 280 259 240

210

187

153 167

120 105

93 84

76 70 65 60

53

42

917 733 611

524

4S8 407

367

333 306 282 262 284 244 265 229 204

183

153

131 114

102

92 83 76

71

66 57 51

46

130'

140'

794S

8556

3973

4278

2648

2852

1986

2139

1S89

1711

1324

1426

1135

1222

993

1070 794 662 S68 497 441

397

361 331

306

248 221

199 181 166

142 153 124

110

99

90

83

76 71 62 55

49

150'

9167 4S84 3056 2292 1833 1528 1310 1146

856

917

713

764

611

655

53S

573

47S

509

428

458

389

417

357

382

329

353 306 327 285

306 267 287 238

255 214 229 194

208 178

191

164

143

134

127

118 107

115 104

97

95

88

82 88

82

76

67

72 64

59

57

53

------------------

Reproduced

by

permossion

of

The

Clevelond

13

------------------

Twist Drill

Co.

TABLE

OF

CUTTING SPEEDS

NUMBER SIZE DRILLS

1

FQQt

Per

Min.

No.

Sue

l

2 3

4

5 6

7 8

9

10 11

12 13

14

15 16

17 18 19

20

21 22 23

24 2S

30'

503

518 538 S48

558

562

570

576

585

592

600

606

620

630

638

647 662 678 690 712

721 730

744 754

767

40'

670 691 717 731

744

749

760 768 780

790 800

808

826 840 851

863 883

904 920 949

961 973

992 1005 1022

50'

838

864

897 914 930

936

975

1000 1010 1032 1239 1050 1064

1079 1104

1130

1151

1186 1423 1201 1441

1217 1240 1257 1508 1276

60'

1005

1037 1076 1097

111S 1123 1310

1140 1330

950

11S1

960

1169

987

1184 1200

1213

1259

1276

1295

132S 13S6

1381 1611 1841

1460 1488

1

S33

70'

1173 1210 1255 1280 1301

1343

1364

1382

1400 1600 1800 1415

1450

1469

1489 1S11

1546

1582 1808 1660

1681 1703 1736 1759 1789

80'

Revolution•

1340 1508 1382 1434 1614 1462 1487

1498

1S20 1535 1559 1579 1777 1974

1617 1652 1859 1679 1702

1726 1942 1766

1898

1922

1946 1984 2010

2044

90'

p4-r

15S5

164S

1613

1685

1710 1727 1754

1819 1889

1914

1987

2034 2260 2071 213S

2162

2190 2232 2262

2300

100'

110'

Minute

1675 1843

1728 1793 1828

18S9

1872

1900

1919

1949

2000 2021

2065

2099

2127

2158

2208

2301

2372

2402

2433

2480

25S5

19m 1974 2010 2193 2376 204S

2060 2090 2111

2144

2171

2200 2400 2600 2223

2271

2309

2334

2374

2429

2479

2531

2610

2644

2676

2728

2S13

2764 2810

120'

2010 2074

21S2

2230 2247

2281 2470 2303 2339

2369

2425

2479

2S18

2546

2S90

2650 27C4 2761

2847

2883 2920 2976 3016 3066

130'

2179 2247 2331 2511

2416

2434

2495

2534

2566 2764

2627 2684

2728

27S9 2806

2870 2930

2991

3084

3123 3164

3224

3267 3322 3577

140'

Z346

2420

2S60 2602

2621

2660 2687 2728 2923

2800

2829

2891 2938 2971

3021 3091

3222 3322

3155

3363 3406

3472 3518

150'

~:)l;i

2593 2690 2741

2788

2809

2850

2879 2961

3001 3032

3097

3148 3183

3237 3313 3380 34S3 3559

3604 3649

3720

3769

3832

I I

I

I I

I

I I I

I

26

27

28

29

30 31

32 33

34

3S

36

37 38

39

40

779 796 816

843

892 9S5

988

1014 1032 1042 1389

1076 1102 1129 11S2 1169

------------------

1039 1061

1088

1124 1189

1273 1317

13S2

1376

1435 1469 1505

1S36 15S9

1299

1327 1592 1360 140S 1487

1592 1647 1690

1721

1736

1794

1837

1882

1920

1949

15S9 1819 1631

1685

1784

1910 1976 2028 2065 2409 2083

21S2 2204 22S8 2303 2339

R

eproduced by perm ission o f The Clevel

18S7 1903 1966

2081 2228

230S 2366

2430 2S11

2S71 2634 2687 2729

2078 2122 2175

2247

2378

2546

2634 2964

2704 2778

2870

2938 3010 3387 3071 3118

2338

2388

2447

2528 2676

286S

3042

27S3

3097

3125 3228

3306 345S

3508 3898

14

------------------

2S98

26S3

2719

2809 2973

3183 3293 3380

3442 3472

35

3673 3763 3839

and

87

Twist

Dr

28S8

2919

2990

3090 3270

3501 3622 3718 378S 3821

394S 4040 4140 4516 4222 4287 4677

ill

3118

3183

3262

3370

3567

3821 39S1 40S6

4129

4167 4304

4407 4775 4607

Co

3378

3448

3534

3651

3864

4138 4281 4394

4474

4514

4663 4892

4991

5067

3638

3714

3806

3932

4162 44S6

4610 4732 4818 4861

5021

5142

S269 S374 5

457

3898 3979

4078 4213 4459

4775

493Q

50'10

5162

5209

S380 5509 5645 5758

5846

I

Fe

Per

Min.

OF

NUMBER SIZE

t

30'

40'

SO'

60'

70'

UTTING SPEEDS

DRILLS-Continued

80'

90'

100'

110'

120'

130' 140'

150'

No,

Size

41 42 43

44

4S 46

47 48 49

50

51

52 53

54

55 56

57

58

59

60

61

62

63

64

65

1194 1226 1288 1333 1397

1415 1460 1S08 1570 1637

1710 1805 1924 2084 2204

2465

2671

2729 2795 2865

2938 3015

3096

3183

3273

1S92 1634

1717 1777 1863

1886 1946 2010 2093 2183

2280 2406 2566 2778 2938

3286 3561 3637 3726 3820

3918

4020 4128 4244

4364

1990 2043 2146 2221 2329

23S8

2387 24S1 2575 266S 2795

2830 2433 2920 2513 2617 2729

2851 3008 3207 3473 3673

4108

4452

4S47

4658

4775

4897 5025

5160

5305 5455

3016 3140 3274

3421 3609 3848 4167

4408

4929

5342 5456 5590 5729

5876 6030 6192 6366 6546

Revolutions

278S 2860 3004 3109 3261

3301

3183 3268 3434 35S4 3726

3773 3406 3893 3S18 3663 3820

3991

4211 4490

4862

5142 57S1

4021

4186 4366

4561

48B

5131 5556 5877

6572

6232 7122 6367 6521 6684

6856 7035

7224

7427 7637

7275

7453 7639

7835 8040 8256 8488 8728

per

3S81

3677 3863 3999 4192

4244

4379

4523

4710

4911

5131

5414 5773

6251 6611

7394

8013

8186 8388 8894

8815 9045

9288 9549 9819

Minute

3979

408S

4292

4442

46S8

4716

4866 5026 5233

54S7 5701

4377

4494 4721 4886

S124

5187

S352 S528 57S6 6002

6271

6015 6619 6414 7062 6945 7639 7346

8215

8903

9095 9316 9549

9794 10050 10320 10610

8080 9036

9771

10004

10248

10504 11459 10774

11057 11366 11671

10910 12005

477S

4902

5150

5330

5S90 56S9

S839 6031 6279 6S48

6841 7218 7704 8334 8815

9857

10660

10913 11180

11753 12060 12398 12732 13096

S172

S311

5579

S774

60S6

6130 6326 6S34 6808 7094

7413 7820 8346

9028

9549

10678 11548 11823

12111

12414 12732

13068 13421 13793 14854

S570

S719

6008

6218 6S22

6602 6812 7036 7326 7640

7982

8421 8988 9723

10284 11500

12436 12732 13043

13369

S968 6128 6438 6662 6987

7074

7299. ".'539

7849 8185

8152 9023

9630 10417 11028

12322 13325 13642 13975 14324

13712 1469 14073 15078

14453

15485 15915

14187 15279 16370

1

----

66 67 68 69

70 71

72

73 74

75

76

77

78

79

80

3474

3582 3696 3918

4091

4419

4584 4776

5106

5457 S730

6366 7161

7902

8490

--

4632

4776

4928 5224 5456

5892

6112

5790

5970 6160

6530 7836

6820 7365

7640 6368 7960 6808

7276 7640

8488

9548

10536

8510

9095

9550

10610 12732 14854 11935 13170

11320 14150

- -

--

6948

7164 7392

8184

8838 9168

9552 10212 10914

8106 8358 8624 9142 9548

10311 10696

11144 11914 12733

10488 10912 12276

11784 12224 12736 14328 15920

13616

14552

10422 11580 12732

9264

10746

9552

11088 12320

9856

11754

13257 13752

15318 16371

11460 13370 15280 17190

16976 19098 14322 15804 16980

Repr o d uc

-------

16709 18438 19810

ed

by perm issi

19096

21072

22640

on

21483 23706 25470

of The Cl

15,

13890

15047

11940 13130 14324 15517 16712 17905

13060

13640 14730 16160

15280

17020

18190

19100 21220 23343 23870

26340 28988

28300

eveland Twist Drill Co.

---

-

13554

14389

15006

16807 18335

17507 18674 20008

21008

26260

31123

-----

14786 15697 16370

16018 17006 17734 19099

17629 19099

19863

19099

20372

21827

22918

25465 28648 31611

33953

20690 22069 23646

24828 27587 29709

31035 34246 36782

-

--------

16205 17250

17362 18482

18314 19622

20463

20568

21390 22282 23767 25465

26738

22037 22918 23873 25465 27284

28648 31831

33422 35810

39514

36880

39612

42441

DRILLING SPEEDS

SPEEDS

HE

T

conditions. The ea

Alloy Steel,

Stainless Ste el. . . . . . . . . . . . . . . . . . . . . 30-

Automotive Steel Forgi To

Steel .4 Mild Ma Hard Medium Hard Cast Iron

Soft Cast Iron ........

Carbon drills

F

feed

1/

and .015

light

he

subject which sider

ch

particular

ol Steel, l.2C... . . . . . . . . . . . . . . . . 50-

to .SC

chine

Chilled Cast Iron .

eeds

are

of .001 to

to ¼

inch, .004

8

er feed than

avi

er feed

INDICATION OF A drill split

EXTREME SPEEDS

AND FEEDS

the

work on t

of out

at

the uch

too m

Wh

en drilling a

of

the

cutting edg

which

refuses to

of the

speed

at

which

a drill

no

rule

can

be

given.

The

following

ed

as

guid

es only, due to correct case

speeds

.

and

the

feeds

variations

should

SUGGESTED SPEEDS FOR HIGH SPEED DRILLS

Speed

in F.P.M.

300

lo

400

. . . .

........

ry Steel

should

Brinell. . . . . . 20-

ngs ... .

.2

.............

be

.. ..

. .

.......

to

.3C ......

...

. .

.....

. .

.......... 70-100

run

at

speeds

. . 40-

. . 30-

30 40 50 60

70-

80

80-110

40

100-150

of

from

FEEDS

governed

to .

025

cutting edges

lip clea

.002

than

he

by

inch

to

.007

inch

given

tool is

ran

brasiv es. bre

ak up

the

per

inch

for drills

above

above.

clearance awa the

somewhere

indicates

ce.

e or w

In

other

size of

the

revolution for drills

for

while

y of speed

ork

materials

and

drill

drills¼

larger

than 1 inch.

cast

up

at

the

extreme

is' too

between

that

either

hardening

packs

to ½

iron, brass

the

center

high.

too

in

the flutes .

should

run

recommended

in

be

determined

Malleable Iron . . . . . . . . . . . . . . . . . . . . 80-

Monet Metal. . . . . . . . . . . . . . . . . . . . . . 40-

High Tensile Ordinary Aluminum Magne Slate, Marble Bakelite

Wood ...... .

40

lo 50% of those

and

the

material

smaller

inch,

.007 Alloy and

web

is

evidence

due

outer

corners

The

best

the

above

the

feed

is too

materials, too

light a feed

AND

and

the feed

materials, methods

Brass

and

sium

and

drilled.

than

1/s

to

.015

and

aluminum

of

to

improper

of

results will conditions. A drill

heavy light a feed

may

sometimes

per

speeds and

by

good,

Strength

and

its alloys .... . .

and

its alloys . . .

and

Stone...........

similar material. . . .

.....

. . . . . .

given

above.

The

inch, .002

inch

for

hard

steels

may

too

much

grinding.

the

cutting be

or

the

drill

will

FEEDS

revolution is

feeds

should

and

other

sound

judgment fo

Speed

Bronze

.....

Bronze ...

..........

ge.eral

to

drills½

should

usually

feed

edges

obtained

chipping

has

result

give a very

. . .

...... 200-300

...

. . .

......

. .

.... 100-150

rule

.004

inch

be

drilled

be

drilled

or

insufficient

The

rap

id

indicates

when

or breaking

been

ground

in excessive

flexible

one

upon

be

con·

operating

in

F.P.M.

90

50

70-150

200-300 250-400

. 15-

25

300-400

is-

use

for drills

to 1

inch,

at

with a

lip

wearing

t

hat

the

effect

with

wear

chip

x

a

I

LUBRICANTS

Lubricants have

1.

To

cool

both

by

dire

cting

work it often

2. To

lubricate the

3.

To

force

oil

pressures

4.

To

improve

materially

It

1s

oils.

Aluminum

Brass: Dry, Copper:

suggested

The

following list of

and

oil, lre

rosene

soluble

Soluble

Cast Iron: Dry

M

alleable

Monel Metal: Soluble oil, sulfurized mine

Steel, ordinary: Soluble oil, sulfurized oil, Steel, Steel, Stainless: Soluble oil, sulfurized

Wrought

very

Iron:

hard

Iron:

the

cutting

as

large

helps

chips

the

chips

will

the

influence

that

its alloys:

and

oil,

or

with a jet of

Soluble

and

Soluble

many

functi

ons, several

edg

es

a volu

to allow a l

. This aids

back

accomplish this

finish of

the

lubrication

lubric

Soluble

soluble

kerosene

winter

oil,

refractory: Soluble

oil, sulfurized oil,

of

me

arge

from

the

work.

machined

ants

oil,

oil mixtures.

and

strained

compressed

non

-viscous

Reproduce

d by

oi t

in chip

prob

the

he

cutti

should

kerosen

lard

mineral

pcrm,ss

of

which

are

as

follows:

tool

and

the

coolant

volume

clearance.

ng

more

The

selection

finish.

lems be

be used

oil compo unds,

oil,

Oleic

air

neutral

ral

oil.

high

oil, sulfurized oil,

high

,o n

work bei

as

possible

to flow

edges

and

efficiently.

and

referred

as suggestions only:

e and lard oil compounds, light non-viscous neutral

acid compo

for a co

of The Clev

oling

oil.

E. P. Value mineral oil.

oil. animal

oil

onto

out

proper app

to a r

light

turpentine.

content

eland

Twist

ng

machined.

on

the

cutting

and

around the

the

flutes of oil

eputable manufacturer

non-vis

unds.

medium.

mineral

Dr

ill Co .

edges.

lication

cous neutral

oil compound

This

piece.

feeding

of

can

On

the

oil.

-16----------------

best

be

thin

walled

drills.

lubricant

of

cutting

.

done

High

will

ugg

tions

for

the

Regrinding

of

Dl'ills

O g t

T

it be properly

the same length

me

nded

as

Another

po

ints

is

the

of

the cutting angle best

of

for

bet

regular immediately clearance the

center center of

BREAKING

BREAXING of

BROKEN

CHIPPING CHIPPING

CHIPPING

HOLE loo large.

ONLY one lip

SPLITl1NG up

ROUGH HOU:.

of

the

approximately

Figure

SYMPTOMS

of

drill

braaa

.

apeed

down

of

cutting

drill

or wood.

TANG

of

margin

of

lip

or checking

drill.

cutting.

coruen

ino

edge,

high

the

maximum

the

best

important

angle

edg

es.

•.veen 8° shop

back

of

angle,

of

the

drill

however,

web

120°-135

2

ground

of

stands

efficiency

at (2nd) of angle

thing

lip

the

for

to

clearance, Experience and 12°

work. This

the

cutting

should

is

approached,

at

an

°,

For a

may

be

taken

that crease. of

lip

clearance the

principal

the

web.

If

you

examine

and

full life of a drill, it is

the

point

: Th~

same mclination

ordinary

be

considered

at

the

edge

or

the

has

shown

periphery

angle

as

be

gradually

purposes

should

shown

until

angle

as

heavy increased

The

shown

feed

the

angle

failure

with

in

to

at

the

cause

are

having

the

grinding

~o

cutting

to

the

(see

Fig. 1).

in

grinding

proper

backing

that a clearance

of

the

be

measured

in

Fig. 2.

increased

the

line

across

the

cutting

Fig.

3.

in

soft

material

15°

at

the

at

the

center

to

give

sufficient

center

of

trouble

of

splitting

with

the

points.

absolutely ed~es aX1s

must

of

the

drill

off

drill

is

The

as

the

edges

the

angle

periphery,

is

given a corresponding

angle

the

drill

drills

your

up

drills

THE LITTLE DOCTOR

A FIRST AID FOR DRILL PRESS OPERATORS

.

of

edgea.

when

.

or

center.

.

c

outer

drill

ulling

of

Spring To o Too Dull Improper

Material Too

Improper No Improper chip

Chip1

-

Imperfect

Overaite Too

Too Heated

a

Too

Unequal

Too Too muc h

Dull Im

oo

T

PROBABLE

or bac k lash

little

lip

low

speed

drill.

chip

being

or

sand inclusion,

much

speed

cutting compound

lubricant

clog

up

Iii of

due

to

nicks, dirt,

socket

jig

much

feed.

much

lip

and

ing

or

while

much

feed

angle

-or both length

both

.

little

lip

feed

or

improperly

lubricant

proper

set-up

m u

ch

feed.

clearance

clearing

drilled

at

clearing

flutes.

bushing

clearance.

cooled

.

or

. Loose

clearance .

or

in

proportion

.

point

tap

er

loo

drilling.

length

spindle

or

angle

.

wro

ng

.

CAUSE

in

press .

by

haa

.

of

drill

by

shank

burrs,

.

quiclcly

ground

lubrica

of

drill.

hard

the c u

of

or

wori

to

the feed.

spola

.

drill

.

in

the

or

while grind-

tting

.

cutting

drill.

nt.

.

,

scale

socket

worn

edges R

Ii~

Laclt

Test Regrind

Increase Sharoen C o

Redu Use Correct

l nc

Use Get a oew socket

-

out

Use

Redu

Wann slo

Reduce feed

Test spindle Regrind

or

Regrind Reduce

R

of

Lub

press

ment

.

rre

c t

ce

proper cutting

rease

drills des

vent rec

proper

ce

teed-see

properly

c

old

water

drilling

egrind pro

e~rin

d propc>rly

rica

te o r c

Reduce

properl

speed dnll

application

speed

application

!!:peed.

urren

.

wly

.

drill prope

with pro

fee

feed

is

a'!ld

size

.

perly

d .

.

igned

on

for

be

drill. 59

Figure

of

but

care

REMEDY

work

for

y.

or dec

.

compound

.

for

or

ce.

bushing

table

before

hot

dnll

.

rigidity

rly

per

lip

.

hange

lubricant.

essential

(1st) of

° is

1

lip

clearance

should

Figure

3

rigidity

and

!°ease

feed.

.

these

mat

ream old one

.

on

page

7 .

usinq

. Do

whtle

grindtng

.

clearan

ce.

that

exactly

recom-

be in-

align-

e ri

als

.

to

pre-

Regrind

not

thr

ow

or

------

-

------

---

Reproduced

--

by permission

-

----

of The Cleveland

17

----

Twist Drill Co.

----

--------

-

--

-

---

METHODS

OF

POINTING AND THINNING DRILLS

REGULAR DRILL POINT

S

tan

dar

d Point for a

UNDERCUT THINNED POINT

Another ning. ning

common

If

properly

will

produ

General

meth

od

don

e this t

ce a fine

of

ype

curled

web

of thin-

Use.

thin·

chip

THINNED POINT

Usual method of

when

drill

because

thick

the

thinning

web

of

repeated

the poi

has

nt

become

re-pointing.

of a

too

I I I I

OFFSET

Genera i

.

ng

heavy web

l method of

thinning

drills.

POINT

and

point-

I

REDUCED RAKE POINT

The

added help

is of

used

Also material to breaking

---------------------

strength

in

drilling very

for shallow holes

prevent

through

of

the

"grabbing"

the bottom of

Reproduced by permission of

cutting

hard

edg

material.

in

any

when

the

hole.

e

Often plastics, wood, cast-iron,

The

Cleveland

18

---------------------

LONG

used

in softer materials 1u

Twist

Drill Co.

POINT

etc

I

ch

.

H

I

DJG

IPEBDI

EAMING HINTS

S~,

for mac

hine

material

do

na

to

be

at

about ~ the

reamed

reamlno

opeed

,

type

uoed

may

of mac

for

YU)'

oouderahly

hine, and

drlllino

the

required oame

dec~:no

malerlal. Speedo

and

In

part

accuracy

for

drllll.no

on

.

th•

In

JlUMIJf

all timeo

lHd

8

u h.ioh a f

TOCK

on

thi1 p

re

amer. For macblne r

,ta

rti

ng

t

hrough

G FEEDS F

1111 nece

may

uary

tend

to redu

eed u poHlh

TO

bue

ao

II

11

poin

t. Fo r band

orealar otock. A comm

ALl8NM£NT

th e accura bad ori

CHA

C

orr

COOLANT

1hown

aBAMBa

allow a t we an

edgee even

elfoct.

nd a ali

TftR

ectinq

on

ool

ar

or ref111es

y tool a

nd cutter

Sharpening The

following

cy of

the hole. Tapered

of ml

eelignment

ght

back

taper The

I.

Exceuive

2. T

oo much c

La

ck of

3.

4.

Ineecure

the cauae can

In

paoe 7 but

rather

REGalNDING

to beco

me

lo cul. This

grinder. Care

the chamfer

.

figures

that

Ibo fe

ce the accur

le and otill prod

BIJ

REMOVBD For

tied

In clooely

eaming

,

.010"

reaming

, olock

on

In

the

ideal

perfe

ct ali

can

be

on

the reame

preeen

hole .

ce of c

Chatter

speed

.

learan

rigidity

In

holding

materially

reaming, the

than

general

dull

.

1barpenin9

on a reamer

1how

for

It

three

in

too

ce

of

thio liet will

mu1t

ee

d,

for

200

ed

, overrise

may

jig

ie

reamlno

to 300% of

be hi9b enou

acy

of

the

hole

uc e

the

ty

pe

ce ie

, or

r

it

will

be

the

reamer

machine .

In

u

practice

i1

u1ually

taken

by hand

" "

To/0

Any

through

while

burniahinq

of

bell-mouthed be

reeult

. 6.

both

io 111ually

be

obtaining

in

10

type,,

with

on a L, " h ole, .0 15" allowances

allowan

reamlng job, the

gnment. r

educed

hatter

on

or

work

increaee emphasia

cooling. Quite

boat

be

common

I

ar•

u111allr much

drill

feedo. Too

gh

lo

permit

and

may

required

the

••m•

material, feed

are

much

.001" to .00

apindle, reamer, huohino, and

variation

the

111a

of

help

reaming

of

one

. 7.

reamer

on

often

thio

found

ealiefactory

mal<imum

the

caee

to

reqrind

restricted

that

each

ii

not

recomme

of

grinda used

low a feed

the

reamer

alao

lower the

lln.Loh

and acc

reuon

rather

than a cultinq

, finioh

on

a ½"

,mailer, partly

3".

from

thie

hole,

ehould

of

floating

in

overcominq

ha1 a very

of

aeveral

5.

hceuive

Ezceuive Too

life

and

the

linieh

and a coolant

.meana a change

.

moot

other

the cha

to

the

enterin9

flute ia 9ro

nded

economy

on

of

hioher

than

thOM uaed

may

ut

rather

qu&lity

.

action. It

depth

to

becau.e

to

increaH

call

for a check

uetahle

effecte

effect

on

overhang

looeeneu

.

of

the

from

toot.. One

taper

ie

practically

reoull

of

the

.025

of

the

holder. Quite

of reamer

of

of in

reamed

i1

normally that

reamen

or

chamfer.

even

lo o uracy

, lnau.ff!cient elook

required,

hole, up

tenda

or adj

the

bad

ca111eo, eome

light a feed

quality

cutting

mfer

on a reamer

und

ezactly

ae

it

reameu:

for

drillino, often

ln

ezceuiv•

than

lo

rub

finah. The

for

reamin9

lo

very

of

hole, end

"

on

a l ½"

difficulty

hole

to

be

reamer

wear

of

alignment. Sometimeo

m.i.Milic,nment.

life

are

reamer

or

floating

holeo

chooen

recommended

the

of

these

before

It

or

the

tool

impouihle

and

lieted

holder

aame

can

which

lon9

reamer

or

hurniah. Too

hulc idea

may

difficult

in

machined

apindle

.

ii

reoull

to

ch.if.

often

it

qeneralise

capacity

hoe, aeeme

forcing

the

are

and

detracta

if

the

on

the

liniah

:

.

for

thio

for

drillin9

principlea

principleo

el<hihit,, ezcellllive

be

done to

keep

cut

on

the

apt

to

runnino

wear. Al

high

lo

to

UM

in

of

the

a c,ood

reamer

all

from

the

UMr

will

in

the

purpoae

a1

apply

ii

not

almoet

overeue

c111tin9

a

in

to

.

I

,I

:

or cle

amount

F igure

O

rdinary reamer point for

In

grinding down to relieve to

the of help:

Size of Cir

Reamer

¼" ½"

l" l

½"

Z'

Mll&B

"Aas.

of

their cutting holeo be

and long

ol

great

OF

help

---------------------

/

A

moat job1

a r

eamer

to

learanc

epec

e b

ar the landa. No bard or laet

of thio c

.

ial me it

ut

the followi

16

cular

Land Width

JXJ7

.

009

.

013

.

016

.

023

....

~

edgeo

life.

In

A-as

will

pey

The

1118

preventing

ol

big

racke

nicke

Re

too

di'ridenda

, c

along

Reproduced

,

...

~

To

2.

t

Fi

re

Pri

amer

uir

y

be

tab

mary

le

gure

9rind

ed

gi

ma

ven

fini.oh or

y

Hand

eome

machine reamer application.

to

obtain req

ii

11111ally neceuary

rule ma

n9

Clearance

14°

11

0

90

70 70

ame

r• are

prec

l1

and c

aref

in

omooth

ontaineu, or

the

c11ttin9

by

perm

ul

treatment

accurate

boze1

ission

ial

ed9eo

of

19

1/

B

aloo uM<l

toleranoe

ae

be

on

A 18COndary

ae

will

The

1hown

the

back

.

of

the

reamed

Clevelond Twist Drill Co.

---------------------

on

.

in

of

the land bei

Semi

en out

Cornen

clearance

Fi9 . D.

hole

Figure

fini

1h

reamer

ben

t or

muet

be

PRIMARY CLEARANCE

ii

often 9 ro11nd on

This

clearance

n9

w•ll

in

order

to p

rev

C

9rind

to m.i.Milic;JDed ke

pt

1harp.

CONDARY

SE CLEARANCE

ie o

nly

a

way

fr

om

ent

ruhhino

900

1traight-

hole1.

reameu

to i

n•ur

the wall

.

•

BASIC THREAD DIMENSIONS

Formerly

Size

of

Thread

and

Threads

per

Inch

x64

l

x56

2

x48

3 4 x40

x40

s

6 x32 8 x32

x24

10

12

x24

¼x20

5

/2

&xl8

3/sxl6

½

&xl4

1/?xl3

9

/2

61(12

5/sxll ¾xl0 7!..x

9 .8750

1

X 8 1.0000

11/sx

7

l¼x

7

l3/4x

6

l½x

6

13/4x

S 1.7500

2

x4½

21f4x

4½

2½x

4

2¾x

4 2.7500

ll. 4 3.0000

3

3¼x

4

3½x

4

331.

...

4

:I'

4 4.0000

A.S .

AND

AMERICAN

M.E. Regular

Major

Diameter

D

Inches

.0730 .0860 .0990 .1120 .1250

.1380 .1640 .1900 .2160

.2500 .3125 .3750 .4375 .5000

.5625 .6250 .7500

1.1250

1.2500

1.3750

1.5000

2.0000

2.2500

2.5000

3.2500

3.5000

3.7500

TAP

NATIONAL

for

Sizes

Pitch

Diameter

E K

Inches Inches

.0629 .0527 .0744 .0628 .0855 .0958 .1088

.1177 .1437 .1629 .1889

.2175 .1850 .2764 .3344 .2938 .3911 .4500

.5084 .5660

.6850

.8028

.9188

1.0322

1.1572

1.2667

1.3917 1.2835

1.6201

1.8557

2.1057

2.3376

2.5876

2.8376

3.0876

3.3376

3.5876 3.4252

3.8376

DRILL SIZES

1-12; U.S.

COARSE

Standard

Minor

Diameter

.0719 .0795

0925

.0974

.1234 .1359 .1619

.2403

.3447

.4001

.4542

.5069

.6201

.7307

.8376

.9394

l.0644

1.1585

1.4902

1.7113

1.9613

2.1752

2.4252

2.6752

2.9252

3.1752

3.6752

THREAD

for

Sizes¼

Commercial

Tap

to

Approx.

Full

in.

and

larger

D =

Major

E =

Pitch

K =

Minor

Drill

Produce

75%

Thread

No. 53 .0595 No.

SO

47

No. No. 43 No. 38 .1015

No. 36 .1065 No. 29

25

No. No.

16

No. 7 .2010

Dia.

Decimal

Equivalent

of

Tap

Drill

Inches

.0700

0785

.0890

.1360 .1495 .1770

F .2570

5

/26

u

271... 31/44

•%2 21/32

49/4.,_

1/s

63/44

l

7/44

1%2

1

%2

191,.,

125/32 21132

2¼ 2½

2¾ 3

3¼ 31/.,

3¾

.3125 .3680 .4219

.4844

.5312 .6562 .7656

.8750

.

9844

1.1094

1.2187

1.3437

1.5625

1.7812

2.0312

2.2500

2.5000

2.7500

3.0000

3.2500

3.5000

3.7500

I

Reproduced

-------------------20-------------------

by

pcrmus1on

of The

Cleveland

Twist

Drill Co

IC

THREAD DIMENSIONS

II II

AND

Formerly A.S.M

Size

of

Thread

and

Threads

per

Inch

x80

0

l

x72 x64

2

x56

3

x48

4

x44

5

x40

6

x36

8

x32

10

x28

12

¼x28

s1Jsx24

sx24

7/,sx20

½x20

9/2

xl8

6

%xl8

¾xl6

%xl4

xl4

1

11/sxl2 l¼xl2 13/sxl2

l½xl2

AMERICAN

.E.

Special

Major

Diameter

D

Inches

.0600 .0730 .0860 .0990 .1120

.1250

.1380 .1640 .1900 .2160

.2500 .3125 .3750 .4375 .5000

.5625 .6250 .7500 .8750

1.0000

1.1250

1.2500

1.3750

1.5000

TAP

DRILL SIZES

(Continued)

NATIONAL

for

Sizes 0-12

Pitch

Diameter

E

Inchea

.0519 .0640

.0759 .0657 .0874 .0985

.1102 .0955 No. 37

.1218 .1460 .1279 No. 29 al697 .1928 .1696 No.

. 2268 .2036 No . 3 .2854 .3479 .3209 .4050 .4675

.5264 .4903 .5889 .5528 .7094 .6688 .8286 .7822 .9536 .9072

1.0709

1.1959

1.3209

1.4459 1.3917

; S.A.E.

Diameter

FINE

Standard

Minor

K

Inches

.0438 .OSSO

.0758 .0849

.1055 .1494

.2584 .3725

.4350

1.0167

1.1417

1.2667

THREADS

for Sizes¼ in.

Commercial

Tap

to

Approx. 75%

Full

Drill

Produce

Thread

3/44

No. 53

SO

No.

45

No. No.

42

No . 33

21

No.

14

I

0

25/44 29/44

33/44 37/44

11

;

16

13Ji

6

1

s1i

6

13/44

111/44

119/44 127/44

and

Larger

Decimal

Equivalent

of

Tap

Drill

Inches

.0469 .0595

.0700 .0820 .0935

.1040 .1130

.1360

.1590 .1820

.2130

.2720

.3320

.3906

.4531

.5156

.5781

.6875

.8125

.9375

1.0469

1.1719

1.2969

1.4219

ll

AMERICAN NATIONAL

Tap

Drills

for

Threads

Size

Drill

R

½s

37/44 2%2 59/44

15/22

by

permission

.n

ti)

'iii

.5

z.S

1

s.

...

.

Oil,,

t,a

I

s~

eJ~

::,

0 u

z

27

1/a

l/4

18 18

3/a

14

½

14

¾

11½

-------------------

...

Q

0

~-,:,

01

~

j.

ll,

8:fi

u

.s

.405 .02963 .540 .675 .04444 .840 .0S714 .70129

l.OSO

1.31S

• u

...

~

ti.

...

oe--.S

.04444

.05714

.06957 1.14407

Pipe

Minor

Diam.

Ill

Small

~

of

Reproduced

End

Pipe

.33388

.43294 .56757

.910S4

PIPE

.!

ti)

'iii

.5:

s~

0 u

z.S z

l¼ l½

2 2½

3 8 3.500

3½

of

The

Clevelond

21

-------------------

s.

...

.

Oil,,

j.a

sJ~

::,

u

.s

11½ 11½

11½

8

Twist Drill Co.

THREAD

...

Q

0

o:

~""·

ll,

s.~

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