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CATALOG ATU-B
High Speed, Precision Equipment
for Push Button or Fully Automatic
Lead Screw Tapping
UTOMATIC
APPING
NITS
and machines
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with V2 to 2 HP reversing
motor
Simplicity and ruggedness of design are combined in the ATU-4 to
create a high speed production tapper that will operate continuously,
day-in-and-day-out, with an absolute minimum of maintenance or
downtime. Its 1% or 2 HP reversing motor, plug reversed at the
bottom of the stroke
is capable of 80 no-load reversals (40 cycles) per minute. Its univer
sal face plate with 1" keyed hole makes it equally suitable for single
spindle or multiple spindle tapping, with quick and easy changeover
from one to the other.
of minutes. The
controls permit using any portion of the lead screw, for maximum
lead screw life. The lead screw nut is split and adjustable for wear.
Controls are all electric; electrical panels are built of the finest
components available. Safety switches at top and bottom of the stroke
provide for
tion is also provided against damage in the event of a “
condition: if no hole is
shuts off.
The unit
or inverted. Its compactness makes it ideal for inclusion in special
machines; it is available with overhead motor mount and poly-v
pulleys and belt, or with direct drive motors.
ATU-4 MACHINE
The ATU-4 Machine incorporates all the fine features of the ATU-4
Unit into a sturdy and versatile floor model machine. The wrap
around welded steel base and heavy ribbed cast iron table are rigid
and sturdy. A coolant
electrical
are standard, but automatic cycling with timer is optional, as is foot
pedal or double-palm cycle start buttons.
Special
of parts, are available.
protection against overtravel in either direction. Protec
may
panel
tapping
and
dynamically braked at the top of
Lead
4"
stroke is fully adjustable within its entire
be
used in any position from horizontal to vertical
is
built into the side
machines, designed for a specific part or a family
screw and nut may be changed in a matter
present the
tank
with pump is built into the
spindle reverses and
of
the base. Push-button controls
the
base, and the
the
stroke,
length;
no hole
machine
”
—
STANDARD MACHINE
OVERHEAD PULLEY
DRIVE UNIT
SPECIFICATIONS
Capacity
Drive
Motors
Spindle Speed
Maximum Spindle Torque
Spindle Drive
Number of
Length of Stroke
Standard Pitches
Controls
Weight:
Standard or special electrical wiring diagrams are available for synchronizing
,1
Ettco ATU-4
cycles
Unit, Overhead Motor Mount Including 2 HP
Separate Mounted Control Panel For Above
Machine, Including 2 HP Motor
units
or
machines with existing machines or with indexing tables.
Within motor capacity
Reversing motor: direct drive or Poly-V pulley
drive
IV2 or
2 hp, 220/440
reversing motors, totally enclosed or open
drip proof, blower cooled.
370 rpm minimum to 2300 rpm maximum.
500 inch pounds.
Universal face plate with 1" diameter hole to
suit standard ASA adjustable adaptor or
drive for multiple-spindle heads.
Up to 80 no load reversals (40 cycles per
minute) with drip proof motors.
Up to 60 no load reversals (30 cycles per
minute) with totally enclosed motors.
.......
Adjustable from 1" to 4"
8, 9, 10, 11, 11
28, 32, 36, 40, 44, 48, 56, 64, 72, 80 threads
per inch. Left hand thread and pitches not
listed can be furnished on special order.
All
electric.
volt, 3-phase, 60-cycle,
>/2,
12, 13, 14, 16, 18, 20, 24,
Motor
165 lbs. approx.
175 lbs. approx.
785
lbs. approx.
Page 3
£
STANDARD MACHINE
hi
• High production—up to 80 no load reversals (40
cycles) per minute.
• Safety interlocks provide for
both directions and against no hole conditions.
FEATURES AND ADVANTAGES
over-ride
protection in
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SURFACE
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244--WIPEX 28^ " DEEP ~~~]
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mixf-
• Rotating parts are ball bearing mounted for long,
trouble-free life.
• Push button controls are standard equipment.Timed
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automatic cycling and foot pedal controls are avail
able as optional extras.
• Unit may be mounted in any position,
• 4" stroke is fully adjustable within the entire length.
even inverted.
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7
30-
47"WIDEX36J " DEPP
Spindle speeds available by changing pulleys:
With 1075-rpm motor — 450 to 2300 rpm
n- I.OOO D/A
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FACE PLATE DIMENSIONS
-
FOR MOUNTING MULTIPLE
SPINDLE TAPPING HEAD
keyway
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GUIDE RODS
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REVERSING
MOTOR
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• Special alloy lead screw nut gives long life, is ad
justable for wear.
• Lead screw of hardened alloy steel is precision
ground to the required pitch.
• Universal face plate with 1" diameter keyed hole
adapts quickly to either single spindle or multiple
spindle operation.
OVERHEAD PULLEY DRIVE UNIT
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Spindle speeds available by changing pulleys:
With 1075-rpm motor — 370 to 2300 rpm
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DIRECT DRIVE UNIT
REVERSING
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184 C FRAME
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■
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with 3 or 5 hp reversing motor
ATU-5 UNIT
The Ettco ATU-5 is a high-production lead screw tapping unit
whose simplicity of design and sturdy construction assures a maxi
mum of continuous trouble-free
high reversing motor that
tapping cycle, to prevent drift or over-ride. Ultra sensitive motor
controls permit depth adjustment to within one-half turn of the
lead screw. Protection
a no-hole condition, and auxiliary safety limit switches at top and
bottom of the stroke provide protection against spindle overtravel.
The
unit is extremely
operation or with a multiple spindle tapping head, in any position
from horizontal to vertical or inverted. All-electric controls permit
interlocking with other units.
the 5" long lead screw
minutes or less.
The
unit
motor with Poly-V pulleys and belt; overhead mounted motor
gear drive utilizing speed change gears; or direct drive and gear
box, also utilizing speed change gears. Either gear drive permits
speeds as low as 150 RPM.
ATU-5 MACHINE
The ATU-5 Machine features a sturdy steel base with a heavy,
ribbed, cast-iron table; round column with raising and lowering
mechanism ; rear mounted, pulley drive motor; built-in coolant tank
and pump; and control panel, to
side of the base. It incorporates all
Unit into a rugged and reliable vertical machine, and when used
with a multiple spindle
tiple spindle
is available
tapping machine.
is
versatile. It may be used for single spindle
; lead screw and nut may be changed in fifteen
with direct drive motor; overhead mounted
tapping head, becomes an inexpensive
service
is
dynamically braked at the end of
provided against tap breakage because of
Controls
NMTBA Standards, built into the
life. Drive is
permit use of any
the characteristics of the ATU-5
by 3 or 5 HE
portion
and
mul
the
of
Standard ATU-5
lead screw tapping
machine with its
heavy, ribbed, cast
iron machine table,
and welded machine
igSi-i
base containing
built-in controls and
coolant tank and
pump is shown with
Ettco in-line multiple
head.
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SPECIFICATIONS
Capacity
Drive
Motors
Spindle Speed
Maximum Spindle
Torque
Spindle Drive
Number of Cycles Up
Length of Stroke Adjustable from 0" to 5".
Standard Pitches 8, 10, 11, 13, 14, 16, 18, 20, 24, 28, 32,
Controls
Weight:
Unit, Overhead Motor Mount Including 5 HP Motor 250 lbs. approx.
Separate Mounted Control Panel for Above
Machine, Including Motor 850 lbs. approx.
Standard or special electrical wiring diagrams are available for synchro
nizing Ettco ATU-5 units or machines with existing machines or with
indexing tables.
I
Within motor capacity.
Reversing motor, direct drive, Poly-V drive or gear
drive. Timing
3 or 5 hp, 220/440 volt, 3-phase, 60-cycle, as
specified.
150 minimum to 2340 maximum.
2100 inch pounds
Universal face plate
standard ASA adjustable adaptor or drive for
multiple-spindle heads.
to 60 no
inch. Left hand thread and pitches not listed can be
furnished on special order.
All electric to NMTBA Standards.
pulleys optional.
with
1%" diameter hole to
load (30 cycles) reversals per minute
175 lbs. approx.
threads
suit
per
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1%
ATU-5
belt
drive
unit
with
overhead
mounted
motor.
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STANDARD ATU-5 MACHINE
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MOTOR MOUNT
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DEPTH 20 ------
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WIDTH SOg
COOLANT ------------
TANK A NO
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Spindle speeds available by changing pulleys:
With 1075-rpm motor — 495 to 2340 rpm
With #707
speed reducer and 1075-rpm motor — 150
ATU-5 UNIT, OVERHEADGEAR DRIVE
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SPEED RANGE: 1075 rpm motor—150 to 1200 rpm
1625 rpm motor—150 to 1700 rpm
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6.93 7
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to
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345 rpm
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• Provides precision lead screw
tapping that produces
threads as accurate as the
tap being used. Fixturing is
simplified because no strip
pers or hold-down
required.
• Operated by electricity only.
No cams ... no air ... no hy
draulic controls are
• Gear drives, employing speed
change gears for a wide
of spindle speeds, are avail- . Universal face plate and drive
able as optional equipment.
• All rotating parts ball bearing
mounted.
• Units and machines come
completely wired, ready to
operate, with oil
control boxes.
• Protection against tap break
age or machine damage if no
hole is present.
• Double protection against
lead screw overtravel in
either direction, through aux
iliary safety controls.
Face plate
for mounting
multiple
spindle
tapping head.
FEATURES AND ADVANTAGES
• Push button controls are
standard. Timed automatic
cycling and foot pedal are
available as optional equip
ment.
range
electric
* Special alloy lead screw nut
adjustable to compensate for
wear.
• Unit may be mounted in any
position.
spindle adaptor enables quick
changeover from one job to
another and from single to
multiple-spindle operations.
• Left hand threads may be
tapped by reversing the motor
electrically and installing a
left hand thread lead screw
and nut assembly.
• 2" diameter lead screw of
hardened alloy steel, pre
cision ground to the pitch
required.
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:
/6
clamps are
needed.
proof
5.998
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GO/D£ RODS
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ATU 5 UNIT, OVERHEAD PULLEY DRIVE
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Spindle speeds available by changing pulleys:
With 1075-rpm motor — 457 to 2340 rpm
ATU-5 UNIT, DIRECT DRIVE
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Speed range with #711 speed change gear box. which is
mounted between motor and unit: 1075 rpm motor, 150
to 678 rpm; 1625 rpm motor, 194 to 1025 rpm.
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Page 6
The Ettco ATU-7 shown here is equipped with a 7% hp motor
and an optional speed reducer that
25 rpm.
permits speeds as low as
The rugged and extremely ver
satile ATU-7 Lead
has been designed and built to
satisfy the
high-production or short-run
tapping and threading jobs.
Rapid advance and retract in
sure the most economical ma
chining cycle. Pitch change is
by means of one readily acces
sible pick-off gear in the gear
train
lead screw for long life, is all
that is required for all pitches.
Speed change is also accom
plished by a change of inexpen
sive pick-off gears, and an
optional speed reducer permits
speeds as low as 25 RPM.
An interior spray mist sys
tem lubricates all moving
parts, and, because the unit is
completely sealed, it may be
run in any position. It may be
used with solid taps, collaps
ible taps, dieheads, or
spindle drillheads. Electrical
and mechanical safety controls
provide for protection against
over-ride and against a no-hole
condition.
The ATU-7 Unit, with ca
pacity up to 7V2 HP, will han
dle any tapping or threading
job better, for a longer period
of time. Check its specifica
tions and characteristics, and
compare.
most demanding
; one coarse pitch Acme
Screw
multiple
Unit
of
.T;
:
*
Built
around
machine threads one 5"-12 and one 4t4"-12 hole
in the part shown. Design, build, and fixturing
were by Ettco. Collapsible taps were furnished
by the customer.
6
two 5 hp ATU-7 units, this 2-way
V
This special machine for threading seven
ferent automotive front spindles was devel
oped by Ettco, using three standard ATU-7
units and special fixturing.
dif
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Page 7
tapping and threading
features:
s Tapping pitch is changed in minutes by a simple
change of one inexpensive gear.
o One coarse pitch Acme Lead
all pitches, assures long life.
o Speed change is accomplished by changing two
pick-off gears.
o Unit may be used with solid taps, collapsible
taps, die heads, or multiple spindle heads.
o All rotating parts
o All steel parts are made of fully heat treated
chrome-moly steel.
CO
CN
SWITCH BOX
are mounted in ball bearings.
.375
Screw
and
Nut,
.500
REAMED HOLE
FOR oowa
8 EQUALLY SPACED .456 HOLES
ON 5.5(M) BOLT CIRCLE
S
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a
5
Is
• Internal mist system lubricates all moving parts.
for
• Unit is completely sealed
any position.
• Optional speed reducer permits speeds as low
25 rpm.
• Electrical and mechanical safety controls provide
for protection against spindle overtravel, and
against tap damage where no hole is present.
• Rapid advance and retract is adjustable from V2" to 3".
® Completely automatic
operation obtained with standard
— may be operated in
cycle,
manual, or jogging
controls.
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Drawing shows 5 hp
Capacity
Motors . .
Spindle speeds
Maximum Spindle
Torque .............
Spindle travel
U t -4-4
11.750
13
HOI FS
motor
Within motor capability.
5 or 7i/
2 h.p., 220/440 volt, 60
cycle, 3 phase, 1075 rpm, revers
ing, flange or foot mounted.
...............
150 through 1400 rpm. With op
tional speed reducer, to 25 rpm.
3500 inch pounds.
5" maximum stroke, V2" to 3"
rapid advance and retract,
imum lead screw travel.
—3y— *24
All dimensions are in
SPECIFICATIONS:
Number of cycles
Standard pitches
Controls Electro-pneumatic.
4" max
Weight
-18-
inches
5 h.p. motor:
(20 cycles) per minute.
7>/
2 h.p. motor: 20 no-load revers
als
(10
6V2 through 20 (finer pitches
available).
Approximately 550 lbs.
40 no-load reversals
cycles) per minute.
7
Page 8
■ ;:,r,
We reserve the
right
to
design of our products without notice.
change the specifications and
Automatic Drilling Units & Machines
Universal Joint Adjustable Drillheads
Special Machines
Automatic Tapping Machines
In back of every
modern, progressive, production-minded
organization whose sole aim is to produce
the finest in drilling and tapping
equipment. No detail is overlooked in
building a product that will give you a
genuine GUARANTEE
Ettco product stands a
OF
SATISFACTION
ETTCO TOOL AND MACHINE COMPANY, INC.,
Yale
St.
& 6th Ave., York, Pennsylvania 17405
Tapping Attachments
Automatic Lead-Screw Tapping Units
Fixed Multiple-Spindle Heads
Double-Eccentric Multiple-Spindle Drill-
heads
Single-Eccentric Multiple-Spindle Drill-
heads
3M-175/1258
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