Geometric Tool Precision Threading Machines Other

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THREADING MACHINE i

.* .

*

The No. 16
threads up to 1" diameter
in National Coarse Thread
Series, sizes up to IV2" in

fine
complete specifications on

On the following pages are shown the complete line
of precision threading machines now supplied by

The Geometric Tool Company.

These machines are offered for the threading of
duplicate parts where precision and quantity pro
duction are paramount issues.

In designing this line of machines the four follow

ing points were stressed in the order named:

Machine

pitch threads. See

pages 8 and 9.

will cut



SIZE RANGE. The three machines as shown offer a



threading range from No. 0 (.060") to IV2" in diam
eter. It should be pointed out, however, that in sizes

1. Accuracy

2. Speed of Production

3. Rigidity

4. Ease of Operation



Page 2

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THREADING MACHINE No. 14

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over one inch, only the finer pitches can be cut. For
complete specifications of each size see pages 8, 9,

10 and 11.

FLEXIBILITY. One of the unique features of this line
of machines, is the flexibility offered in the way of
work holding devices. As shown in Figures 1, 2 and
3, page 5, the machine may be purchased with

merely the machine platen (in which case you may
make your own work holder, one exactly suited for
the job to be done); with a standard two jawed vise;
or with a standard collet holding device. The last two
are standard equipment which may be furnished

with any of three sizes of machines. Special work

holders* to be mounted on the machine platen may

also be made up at the factory to special order.

’

Discontinued lor the duration.

The No. 14 Machine will cut
threads up to 9
tional Coarse Thread
sizes up to 1" in fine pitch
threads.
specifications on pages 8

i«" in Na

Series.

See complete



Page 3

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The No. 11 Machine though
intended primarily for small
diameter, fine pitch threads

up to 5
also be used on finer pitches
up to ?i«" diameter. See
complete specifications on

TYPE OF DIE HEAD. Either the Style KD Geometric
Rotary Die Head using conventional Milled or
Tapped Chasers or the Style TR* Geometric Rotary
Die Head employing Tangent or Circular Chasers

may be furnished at customer's option (no s/16" Size
TR is made thus the smallest thread diameter with
Tangent or Circular Chasers is approximately Ve" to

Vis").

’

Discontinued for the duration.

/ie

,r diameter may

pages 10 and 11.

1

Page 4

ADJUSTABLE ALIGNMENT. Perhaps the outstand
ing advantage of this line of Geometric Threading
Machines is a unique method of maintaining both
vertical and horizontal alignment. Opposed adjust
ing screws with an unusual pivoting arrangement of
the carriage enables the user to keep the work holder
in accurate alignment with the Die Spindle at all
times. This unique alignment feature is shown in
line view in Figure 5. page 5.



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ACCURACY. Class 3 Fit

is guaranteed. Vise align

ment; hardened ways; pre
cision Die Heads; accu
rately hardened Chasers
all made by a concern which has devoted 50 years
exclusively to thread cutting equipment, make this
guarantee more than mere words.

EASE OF OPERATION. Waist high controls, quick

acting holding device, automatic work gage, quickly
removable oil hood and splash guard, all combine to
make this an easy machine to operate.

I

1

’

CHANGE GEARS. Lift off the louver cover on the

back of the head of the machine and there are the

pick-off change gears—as

SCREWS FOR

HORIZONTAL ADJUSTMENT

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—

shown in Figure 4, page 5.

SCREWS FOR

VERTICAL ADJUSTMENT

Dd

ways. The platen, carrying
the work holding device is
advanced to the threading
tool by means of a con
venient

ANTI-FRICTION SPINDLE.

The line view, Figure 6,

page 6; shows the general
design of the spindle and drive shaft construction
of the No. 14 and No. 16 Machines. Since the motor

lever.

LOOSEN NUTS

TO MAKE ADJUSTMENT

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FIG. 5

Machine Platen is mounted
on hardened and ground



FIG. 4

is mounted on top of
the head of the No.

11 Machine, the con
struction on this ma
chine is somewhat
different. However in

all cases you'll find

Drive Shaft and

Spindle equipped

with Tapered Roller

Bearings, and remov
able Shims for bear
ing adjustment. All
parts are made of
special alloy steel,
hardened and
ground.

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






This is just one example of accessibility. For another,
note how easily you can get at the pump
the No. 14 or No. 16.
To remove the chips, slip off the splash guard and
rake out from chip pan.

Machines (see Figure 8, page 7).

or

motor on

AUTOMATIC WORK GAGE. The standard vise

carries an automatic work gage or stop which in-

the proper setting of the work. This device is

sures

clearly shown in Figure 1, page 5. It automatically
swings out of the way as the work is tightened in

Page 5

the

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vise. Note the cam arrangement which controls the
work gage. This cam may be positioned so as to

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XXXXXXXSXX

(Sf NOZZLE FOR

Si FEEDING COOLANT

-THROUGH SPINDLE

CHANGE

GEARS

XGREASE CONNECTION
X

of the base of the machine, and the pump, motor
base, etc. are right where you can get at them. See

SETSCREW a CHECK
NUT FOR DIE HEAD

BEARING SHIMS
OIL SEALS SPINDLE

X

SHANK

X

X

X

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DIE HEAD

GREASE CONNECTION

1

X
X

X

X

X

X

X

X

X

x

X

X

X

X

X
X

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s

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properly
of work. The work gage is, of course, adjustable for
length of thread. The collet type chuck may, if de

sired, be fitted with a solid work stop in the draw tube.

VEE BELT DRIVE. The Drive Shaft is driven by Vee

Belts direct from the motor pulley—one belt being

used on No. 11 Machine, two belts on the No. 14 and
four belts on the No. 16 Machine. To get at the Vee
Belts for adjustments on the No. 14 and No. 16 Ma

chines merely remove the Speed Plate as shown in
Figure 7, page 6. On the No. 11 Machine, remove
change gear cover.

MOTOR DRIVE. On the No. 14 or No. 16 Machine

just remove the lower louver cover at the back end

operate the work stop for various diameters

§

BEARING SHIMS
DRIVING SHAFT

X

X

X

GREASE

X

X
X

CONNECTION

x

X

X

X

/

X

X

X

X

X

X

X

X
X

FIG. B





—

VEE BELTS

Figure 8, page 7. The motor is mounted on a sliding
base for convenient adjustment. (The sliding base
must be ordered with
the motor and is not a
part of the machine.)

On the No. 11 Machine
the motor is mounted on
top of the head of the
machine on adjustable
studs which are fur

nished with the ma

chine. No sliding base

is required with this
machine. The No. 11
Machine can be so
equipped as to drive

Page 6

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Company

from a light socket connection, making machine
portable as shown in Fig. 9, page 7.

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FIG. 8

Any of these machines can be used in cutting left
hand threads, provided the machine is equipped
with a reversing switch and left hand chasers.

PUMP. The pump is of reversing type—self-reliev

ing—driven by a single Vee Belt from the motor as
shown in Figure 8, page 7. (The illustration shows
the No. 14 and No. 16 Machines only.) The pump on
the No. 11 Machine is driven direct from the Drive
Shaft and may be reached by removing the speed

ing Machine equipped with a Lead Screw. The Lead

Screw is operated by a split nut which is automati-

cally disengaged at the end of the cut when the ad
justable threaded rod at A. contacts the lever at B.
The Lead Screw may be manually disengaged, if
desired, by striking Handle C a sharp blow with the
hand, the direction of the blow being toward the



operator. The Lead Screw mechanism is reset by~

means of Handle C which is, of course, pushed
forward, away from the operator.

A set of three Lead Screw Gears is required for

each pitch of thread, the meshing spindle gear re-



plate. The pump supplies coolant, either overhead
or through the spindle by means of a two-way

LEAD SCREW. A Lead Screw can be furnished, if

desired, with No. 16 Machine. Figure 10, page 7,
shows a close-up of the vise end of a No. 16 Thread-

valve.

Page 7

maining constant for all pitches. To change the Lead
Screw Gears merely remove the Gear Cover and
they are easily reached, see Figure 7, page 6.

PRODUCTION FIGURES. Prices and production

figures furnished on receipt of

blue prints or samples.

o. 14 & 16

NOZZLE FOR FEE0IN6
COOLANT THROUGH,

SPINDLE

CHANGE GEARS FOR
CHANGING SPINDLE SPEED

QUICK REMOVABLE CHANGE
GEAR COVER

3 WAY SHUT OFF VALVE
FOR FEEDING COOLANT N

EITHER THROUGH SPINDLE
OR OVERHEAD

VEE BELT DRIVE

FOR SPINDLE

ADJUSTABLE MOTOR

SLIDING BASE

VEE BELT DRIVE
FOR PUMP

REVERSING PUMP - SELF
RELIEVING

GREASE CONNECTION

STARTING

SWITCH

----

CLOSING ANO

OPENING YOKE

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ADJUSTABLE
OIL HOOD

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COOLANT

RESERVOIR

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DIE HEAD

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VISE TYPE

CHUCK

SPLASH GUARD

CLOSING STOP

HAND TRIP

AUTOMATIC WORK

GAGE

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OVERHEAD COOLANT

PIPING

HARDENED AND GROUND

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COOLANT RESERVOIR

COOLANT RESERVOIR

'LATEN TYPE CARRIAGE

EVER FEED FOR

CARRIAGE

STRAINER PLATE

STRAINER TRAY

OVERFLOW PIPE

DRAIN PLUG FOR

Examine carefully the line
valuable not only as showing the main features of the machine but it

view

shown

above. You will find this extremely also may be used

Page 8

for ordering repairs.

as a

guide in making adjustments or even as a chart

t

SPECIFICATIONS

TABLE OF SPINDLE SPEEDS

No. 14 Machine No. 16 Machine

R.P.M.

100

110
125

150

175

195

220
255
300

345
395
450

515

615

705

790
885

1040

1240
1430

Spindle

Gear

96

94

91
87
83
80

77
73

68
64

60

56

52

47
43

40

37
33

29

26

Driving

Gear

24

26
29

33
37
40

43

47

52
56
60

64

68
73

77

80
83

87

91

94

R.P.M.

55

70

80
95

115

130

155
175

205
235
260

285

315
350

400

460
530
615

720

855
1030
1200

Spindle Driving

Gear Gear

100

97
94
90
86
82

78
74

70
66
63
60

57
54

50

46
42

38

34

30

26

23

20

23

26
30
34
38

42
46

50

54

57
60

63
66

70

74
78
82
86

90
94

97

Distance from Vise to Die
Distance from Collet to Die

‘

Maximum length of thread—with vise

‘

Maximum length of thread—with collet

*

Figures based on No. 14 Machine equipped with Vie"

KD Die Head, No. 16 with 1" KD Die Head; vise
equipped with automatic work gage.

Capacity—Standard chuck jaw bushings
Maximum opening chuck jaw bushings .

Capacity—Collet type chuck

Round ........................................................

Hex ............................................................

Square ......................................................

Capacity—Coolant Reservoir

Floor space required

Approximate weight of machine with motor:

DESCRIPTION

Head

Head

Net

Gross (Domestic)
Gross (Foreign) .

Motor recommended:

Horse Power

R.P.M........................

Code Word

.........

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

MACHINE

Max. 6"; Min. 0"
Max. 8"; Min. 0"

43/4"

^

73/4"

Vs” to 3/4"

W Max.

21/32" Max.
17/32" Max.

3 Vi Gals.

24" x 40"

625 lbs.
725 lbs.
800 lbs.

1 H.P.

1200 R.P.M.

Agora

No. 14

VA"

MACHINE

Max. 7 Vi"; Min. 0"
Max. 93/e"; Min. 0"

Va“ to 1*4"

23/32" Max.

6V2 Gals.

28" x 51"

1025 lbs.
1225 lbs.
1300 lbs.

1200 R.P.M.

No. 16

5%"

9"

1 W

1" Max.

%" Max.

2 H P

Alamo

Spindlo Spoods for No. 14 Machine basod on 395 R.P.M. for Driving Shaft.

Spindlo Spoods for No. 16 Machine basod on 285 R.P.M. for Driving Shaft.

Furnished as standard equipment and included in the price of the
machine are:—Pump, Oil Hood, Splash Guard, Necessary Wrenches,

Die

Head

Operating Yoke, Vee

Belt

Drive and one pair Pick-off

STANDARD EQUIPMENT

Gears.

The following items are extra and must be specified by the cus
tomer:—Holding Device, Die Head, Chasers, Motor, Motor Equip

Page 9




ment and Wiring.

MACHINE

N

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. 11

.BELT GUARI

VEE BELT DRIVE

NOZZLE FOR FEEDING \
COOLANT ^THROUGH SPINDLE

GREASE
CONNECTION

CHANGE GEARS FOR

CHANGING SPINDLE SPEED

QUICK REMOVABLE CHANGE
GEAR COVER-

3 WAY SHUT OFF VALVE

FOR FEEDING COOLANT
EITHER THROUGH SPINDLE
OR OVERHEAD

MOTOR ADJUSTING

SCREWS

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

CLOSING AND
OPENING YOKE

ADJUSTABLE

OIL HOOD

DIE HEAD

OPENING STOP

VISE TYPE

CHUCK

CLOSING STOP

HAND

TRIP

AUTOMATIC WORK

GAGE

STARTING SWITCH

OVERHEAD COOLANT

PIPING

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PLATEN TYPE CARRIAGE

HARDENED AND GROUND

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/ STEEL WAYS

/

LEVER FEED FOR

CARRIAGE

rw

STRAINER PLATE

REVERSING PUMP -
SELF RELIEVING^

COOLANT RESERVOIR

Examine carefully the line view shown above. You will find this extremely
valuable not only as showing the main features of the machine but it

Page 10

\

BENCH

(OPTIONAL)

also may be used as a guide in making adjustments or even as a chart
for ordering repairs.

STRAINER TRAY

DRAIN PLUG FOR

COOLANT RESERVOIR

I

s

TABLE OF SPINDLE SPEEDS

No. 11 Machine

R.P.M.

155

185

215
250

290

330
375

425
480
535
600
670
730
795

885

995

1115

1255
1410
1605

Spindle

Gear

119

115

111
107

103

99
95
91

87
83
79
75
72
69

65

■ 61

57
53

49

45

Driving

Gear

25

29

33
37
41

45
49
53
57
61
65
69
72
75

79

83

87

91

95

99

I I I

Distance from Vise to Die

Distance

‘

Maximum length of thread—with vise

‘

Maximum length of thread—with collet

Capacity—Standard chuck jaw bushings ..........................................................

Maximum—Opening chuck jaw bushings . .

Capacity—Collet type chuck

Round .............................................................

Hex ...................................................................

Square

Capacity—Coolant Reservoir ........................

Floor Space required (with or without base)
Approximate weight of machine with motor without pedestal:

from Collet to Die

* Figures based on machine equipped with5/iq" KD Die Head and vise

equipped with automatic work gage

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

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

Net

Gross (Domestic)

Gross (Foreign) .
Weight of Pedestal . .
Motor recommended:

Horse Power
R.P.M

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

Code Word

.........

DESCRIPTION

Head

Head

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

—.—

s

No. 11

MACHINE

Max. 41/2"; Min. 0"
Max. 5'%"; Min. 0

Max. 316"

55/a"

Vb" to W'

16" Max.

Vie" Max.

n

/32" Max.

316 Gals.

23" x 36"

305 lbs.
440 lbs.

490 lbs.

60 lbs.

16 H.P.

1800 R.P.M.

Abode

”

3/4"

Spindlo Spoodfl banod on 730 R.P.M. 1 or Driving Shaft.

STANDARD EQUIPMENT

Furnished as standard equipment and included in the price of the
machine are:—Pump, Oil Hood, Splash Guard, Necessary
Die

Head Operating Yoke, Vee Belt Drive and one pair

Wrenches,

Pick-off

Gears.

Page 11

The following items are extra and must be specified by the cus
tomer:—Holding Device, Die Head, Chasers, Motor, Motor Equip
ment and Wiring.




—

• +

SPEEDS

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FOE HIGH Si m

FOR ALL TAPER THREADS PRODUCED BY JAM CUT USE 75% OF SPEED GIVEN

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RISERS

MATERIAL

g

5

5

DIE CAST

3

STAMPING

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BAKELITE

FORGING

w

STAMPING

</)

TUBING

s

03

NAVAL
PHOSPHOR
TUBING

N

z

CAST

O

i

MANG' NESE

CAST ALUM.

ROD
CAST

CAST
BAR

BAR

SPEED

SYMBOL

F

D

E

F

D

E

MATERIAL

CELLULOID
COPPER

EVERDUR
FIBRE
GERMAN

SILVER

WROUGHT

z

O

MALLEABLE

2

CAST
MONEL
METAL
NICKEL
RUBBER

BESS'M'R

LJ

SCR.STOCK

W

8

CAST

SPEED

SYMBOL

F

E

C

F
E

B
C
D

A

D
F

c

MATERIAL

1010-1035

1112-X1340

1040-1095

J
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CHROME

w

S120-521

h

l/)

CHROME

6115-6195

FORGING

MOLYB

DENUM

4130-4020

CARB.

CARB.

MANG.

T1330
T1350

VAN.

TABLE

SYMBOL

00



SPEED

c

B

A

NO. 1

MATERIAL

NICKEL

2015-2515

Nl-CHROME

3115-3450

NlTRALLOY

J

STAINLESS

Li

FREE MACH

bJ

STAINLESS

h

(STRINGY)

w

STAMPING

TUBING

CASTING

ZINC

DIE CASTING

TOOL

SEMI



SPEED

SYMBOL

SPEED

SYMBOL

A

B
A
B

D

F

SURFACE SPEED (F.P.M.) FOR T. P. I.

3 TO 7-1/2

A

B

C

D

F

0 TO 15

8

15

20 30

25

40

50

100

10

20

40

80

16 TO 24

15

25

40

50

100E

150

25 a UP

20

30

50

80

150

200

TABLE NO. 2

SURFACE SPEED

(F. P.M.)

DIAM. OF WORK

1/8*

1/4*
3/8*
1/2"
5/8*

3/4*
7/8*

. 1*

1-1/8*

1-1/4*
1-3/8*
1-1/2*

1-5/8*
1-3/4*
1-7/8*

2* 15.3
2-1/8*
2-1/4*
2-3/8*
2-1/2*
2-5/8*

2-3/4*
2-7/8*

3*
3-1/4*
3-1/2*

3-3/4"

FOR SIZES LARGER THAN 4' DIAMETER. IT IS ONLY NECESSARY TO BEAR IN M IND THAT SPEEDS CHANGE IN INVERSE PROPORTION

TO THE DIAMETER.

8 10

15

20

25

30

40

50

80

100

R. P. M.

245
122

81.4
61 2

48.8
40 8

35.0

30.6
27 2

22.2

20.4
18 8

17.4

16.3

14.4
13 6
12 9
12 2

11.6 14.5

11.1
10 5
10 1

FOR

EXAMPLE WHERE 3' DIAMETER HAS 10.1 R.P.M.; 6' DIAMETER WOULD BE 5.05 R.P.M. OR ONE HALF

9.4

8.5
8 1

305

153
102

76 5
61 0
51 0

43.6
38 2

33.9

30.524.4

27.8

25.4

458 764
229

153
115

91.7
76 4

65.5

57.3

50.9

45.8
41 7

38.2

23.5 35.3
21 8

20.3

19.1

18.0
17 0

16. 1

15.3

32.7

30.6

28.7

27.0

25.5

24.1
22 9

21.7

13 9

13.2
12 7
1 1.7

10.9

10 2

9.57.6

20 8
19 8

19. 1

17.6
16 4
15 3

14.3

| 611

306
204

153
122
102 127

87.3
76 4

67.9
61 1

55.6

50.9

47.0

43.7
40 7

38.2
36 0
34 0
32 2
30 6
29 0

27.8

26.4

25.5

23.5
21 8

20.4
19 14*23 9

917 1222
382
255

191
153

458

306 407

229

183
153

109

95. 5

84.9

76.4

69.5
63 7
58 8
54 6

50.9

47.7

45.0

42.4
40 3
38 2
36 3
34 7

33.0

131
115
102

91 7

83.3

76.4
70 5
65 5
61 1

57.3
54 0

50.9

48.3

45.8

43.5

41.7

39.6

31.8 33.2
29 4
27 3

25.5

35.3
32 7

30.6

28.7

61 1

306
244
204

175
153
136
122
111
102

94.0
87 3

81.5

76.4
72 0

67.9

64.4
61 1

58.0

55.6

52.8

50.9

47.0

43.7

40.7
38 2

1528

764

509

382
306
255
218

191
170
153
139
127
118
109
102

95.5

90.0

84.9

80.5
76 4

72.5
69 5

66.0

63.7
58 8

54.6
50 9
47 7

2445
1222

815
61 1
489
407
349
306

272

244
222
204
188

175
163
153
144
136

129
122

116

1 1 1

106

102

94.0

87.3
81 5
76 4

3056

1528
1019

764

61 1
509
437
382
340
306
278
255
235
218 327 436
204

191

180

170

161

153

145

139

132

127

118

109

102

95.5 > 143

150

4584

2292
1528

200

6112
3056

2038

1146 1528

917

1222
764 1018
655

874
573 764
509 680

458

417
382
353

306

612

?56

510

470

408
287 382
270 360
255
242
229
218
208

198

191
176
164
153

340
322
306
290
278
264
254
236
218
204

191

*

s

m

THE GEOMETRIC TOOL CO.

NEW HAVEN 15, CONN.

/

7-15-43. Prinled in

U. S. A.