Promac GH-2260ZX User manual

GH-2260ZX
GH-2280ZX
METAL LATHES
Original:
GB
Operating Instructions
Translations:
D
Betriebsanleitung
F
Manuel Utilisateur
Schweiz / Suisse France
JPW (Tool) AG TOOL FRANCE SARL
Ackerstrasse 45, CH-8610 Uster, 9 Rue des Pyrénées, 91090 LISSES, France
Switzerland www.promac.fr
www.promac.ch
M – GH-2260ZX-T GH-2280ZX-T 2019-04

CE-Conformity Declaration
CE-Konformitätserklärung
Déclaration de Conformité CE
Product / Produkt / Produit:
Metal Lathe
Drehbank
Tour à métaux
GH-2260ZX
GH-2280ZX
Brand / Marke / Marque:
PROMAC
Manufacturer / Hersteller / Fabricant:
TOOL FRANCE SARL
9 Rue des Pyrénées, 91090 LISSES, France
We hereby declare that this product complies with the regulations
Wir erklären hiermit, dass dieses Produkt der folgenden Richtlinie entspricht
Par la présente, nous déclarons que ce produit correspond aux directives suivantes
2006/42/EC
Machinery Directive
Maschinenrichtlinie
Directive Machines
2014/30/EU
electromagnetic compatibility
elektromagnetische Verträglichkeit
compatibilité électromagnétique
designed in consideration of the standards
und entsprechend folgender zusätzlicher Normen entwickelt wurde
et été développé dans le respect des normes complémentaires suivantes
EN ISO 12100:2010
EN ISO 23125:2015
EN 60204-1:2006+A1:2009
EN 61000-6-2:2005
EN 61000-6-4:2007+A1:2011
Responsible for the Documentation / Dokumentations-Verantwortung / Résponsabilité de Documentation:
Head Product-Mgmt. / Leiter Produkt-Mgmt. / Resp. Gestion des Produits
TOOL FRANCE SARL
2018-11-20 Chr stophe SAINT SULPICE, General Manager
TOOL FRANCE SARL
9 Rue des Pyrénées, 91090 LISSES, France

1
GB - ENGLISH
Operating Instructions
Dear Customer,
Many thanks for the confidence you have shown in us with the purchase of your new PROMAC -machine. This manual has been
prepared for the owner and operators of a JET GH 2280ZX metal lathe to promote safety during installation, operation and
maintenance procedures. Please read and understand the information contained in these operating instructions and the
accompanying documents. To obtain maximum life and efficiency from your machine, and to use the machine safely, read this
manual thoroughly and follow instructions carefully.
…Table of Contents
1. Declaration of conformity
2. Warranty
3. Safety
Authorized use
General safety notes
Remaining hazards
4. Machine specifications
Technical data
Noise emission
Contents of delivery
Machine description
5. Transport and start up
Transport and installation
Assembly
Mains connection
Initial lubrication
Starting operation
Break in procedure
6. Machine operation
Controls
Chucking
Tool setup
Spindle speed selection
Turning with auto feed
Thread cutting
Drilling operation
7. Setup and adjustments
Turning between centres
Taper turning with tailstock
Taper turning with top slide
Three jaw universal chuck
Four jaw independent chuck
Live centre
Steady and follow rest
Bed gap removal
8. Maintenance and inspection
Annual lubrication
Weekly lubrication
Daily lubrication
Slide adjustments
Shear pin replacement
Headstock alignment
Coolant system
9. Trouble shooting
10. Environmental protection
11. Available accessories
1. Declaration of conformity
On our own responsibility we hereby
declare that this product complies
with the regulations* listed on page
2. Designed in consideration with the
standards**.
2. Warranty
TOOL FRANCE SARL guarantees
that the supplied product(s) is/are
free from material defects and
manufacturing faults.
This warranty does not cover any
defects which are caused, either
directly or indirectly, by incorrect use,
carelessness, damage due to
accidents, repairs or inadequate
maintenance or cleaning as well as
normal wear and tear.
Further details on warranty (e.g.
warranty period) can be found in the
General Terms and Conditions
(GTC) that are an integral part of the
contract.
These GTC may be viewed on the
website of your dealer or sent to you
upon request.
TOOL FRANCE SARL reserves the
right to make changes to the product
and accessories at any time.
3. Safety
3.1 Authorized use
This metal lathe is designed for
turning and drilling machinable metal
and plastic materials only.
Machining of other materials is not
permitted and may be carried out in
specific cases only after consulting
with the manufacturer.
Never cut magnesium-
high danger to fire!
The workpiece must allow to safely
be loaded and clamped.
The proper use also includes
compliance with the operating and
maintenance instructions given in
this manual.
The machine must be operated only
by persons familiar with its operation
and maintenance and who are
familiar with its hazards.
The required minimum age must be
observed.
The machine must only be used in a
technically perfect condition.
When working on the machine, all
safety mechanisms and covers must
be mounted.
In addition to the safety requirements
contained in these operating
instructions and your country’s
applicable regulations, you should
observe the generally recognized
technical rules concerning the
operation of metalworking machines.
Any other use exceeds authorization.
In the event of unauthorized use of
the machine, the manufacturer
renounces all liability and the
responsibility is transferred
exclusively to the operator.

2
3.2 General safety notes
Metalworking machines can be
dangerous if not used properly.
Therefore the appropriate general
technical rules as well as the
following notes must be observed.
Read and understand the entire
instruction manual before attempting
assembly or operation.
Keep this operating instruction close
by the machine, protected from dirt
and humidity, and pass it over to the
new owner if you part with the tool.
No changes to the machine may be
made.
Daily inspect the function and
existence of the safety appliances
before you start the machine.
Do not attempt operation in this
case, protect the machine by
unplugging the power cord.
Remove all loose clothing and
confine long hair.
Before operating the machine,
remove tie, rings, watches, other
jewellery, and roll up sleeves above
the elbows.
Wear safety shoes; never wear
leisure shoes or sandals.
Always wear the approved working
outfit.
Do not wear gloves.
Wear goggles when working
Install the machine so that there is
sufficient space for safe operation
and work piece handling.
Keep work area well lighted.
The machine is designed to operate
in closed rooms and must be placed
stable on firm and levelled ground.
Make sure that the power cord does
not impede work and cause people
to trip.
Keep the floor around the machine
clean and free of scrap material, oil
and grease.
Stay alert!
Give your work undivided attention.
Use common sense. Do not operate
the machine when you are tired.
Do not operate the machine under
the influence of drugs, alcohol or any
medication. Be aware that
medication can change your
behaviour.
Never reach into the machine while it
is operating or running down.
Never leave a running machine
unattended. Before you leave the
workplace switch off the machine.
Keep children and visitors a safe
distance from the work area.
Do not operate the electric tool near
inflammable liquids or gases.
Observe the fire fighting and fire alert
options, for example the fire
extinguisher operation and place.
Do not use the machine in a dump
environment and do not expose it to
rain.
Work only with well sharpened tools.
Always close the chuck guard and
pulley cover before you start the
machine.
Remove the chuck key and
wrenches before machine operation.
Specifications regarding the
maximum or minimum size of the
work piece must be observed.
Do not remove chips and work piece
parts until the machine is at a
standstill.
Do not stand on the machine.
Connection and repair work on the
electrical installation may be carried
out by a qualified electrician only.
Have a damaged or worn power cord
replaced immediately.
Never place your fingers in a position
where they could contact any
rotating parts or chips.
Check the save clamping of the work
piece before starting the machine.
Don’t exceed the clamping range of
the chuck.
Work pieces longer than 3 times the
chucking diameter need to be
supported by the tailstock or a
steady rest.
Avoid small chucking diameters at
big turning diameters.
Avoid short chucking lengths.
Avoid small chucking contact.
Never exceed the max speed
limitation of the work holding device.
Choose a small spindle speed when
working unbalanced work pieces and
for threading and tapping operations.
Any work piece stock extending the
rear end of the headstock must be
covered on its entire length. High
danger of injury!
Long work pieces may need a steady
rest support. A long and thin work
piece can suddenly bend at high
speed rotation.
Never move the tailstock or tailstock
quill while the machine is running.
Remove cutting chips with the aid of
an appropriate chip hook when the
machine is at a standstill only.
Never stop the rotating chuck or
work piece with your hands.
Measurements and adjustments may
be carried out when the machine is
at a standstill only.
Setup, maintenance and repair work
may only be carried out after the
machine is protected against
accidental starting by pulling the
mains plug.
3.3 Remaining hazards
When using the machine according
to regulations some remaining
hazards may still exist.
The rotating work piece and chuck
can cause injury.
Thrown and hot work pieces and
cutting chips can lead to injury.
Chips and noise can be health
hazards. Be sure to wear personal
protection gear such as safety
goggles and ear protection.
The use of incorrect mains supply or
a damaged power cord can lead to
injuries caused by electricity.
4. Machine specifications
4.1 Technical data
GH 2260/ 2280 ZX
Swing over bed 560mm
Swing over bed gap 760mm
Swing over cross slide 330mm
Centre distance 1500/ 2000mm
Width of bed 335mm
Spindle taper MT-7
Spindle nose DIN 55029(Camlock) S8
Hole through spindle ∅80 mm
Spindle speeds…12 25-1800 rpm
Tailstock ram travel 150mm
Tailstock taper MT-5
Steady rest capacity 20 -200mm
Follow rest capacity 12 – 90mm

3
Cross slide travel 300mm
Top slide travel 130mm
Tool size max 25 x 25 mm
Longitudinal feeds 0.04–2.5mm/r
Metric threads...24 0.5–20mm
Inch threads…61 1-5/8 – 72 TPI
Lead screw pitch 6mm
Coolant tank capacity 15 L
Overall L x W x H
2830/ 3320 x 1100 x 1470mm
Net weight 2900/ 3145 kg
Mains 400V ~3L/PE 50Hz
Output power 7.5 kW (10.2 PS) S1
Reference current 10 A
Extension cord (H07RN-F): 4x2.5²
Installation fuse protection 25A
4.2 Noise emission
Acoustic pressure level (EN 11202):
Idling at maximum speed 81,2 dB (A)
The specified values are emission
levels and are not necessarily to be
seen as safe operating levels.
As workplace conditions vary, this
information is intended to allow the
user to make a better estimation of
the hazards and risks involved only.
4.3 Content of delivery
Cast iron stand
6 Leveling pads
Pull out chip tray
Splash guard
250mm 3-jaw universal chuck
300mm 4-jaw independent chuck
300mm faceplate
Four way tool post
Steady rest
Follow rest
Foot brake
Coolant system
Halogen work light
MT-4 (MT-5) life centre
MT-5 fixed centre
MT5/MT7 centre sleeve
Threading dial
Operating tools in tool box
Oil can
Operating manual
Spare parts list.
(see end of document for detailed
content)
4.4 Machine description
Fig 1
A….Lathe bed
B….Headstock
C….Carriage
D….Top slide
E….Cross slide
F….Four way tool post
G….Apron
Fig 2
A…..Tailstock
B…..Lead screw
C…..Feed rod
D….Gear box
E…..Follow rest
F…..Steady rest
5. Transport and start up
5.1 Transport and installation
The machine will be delivered in a
closed crate.
For transport use a forklift or hand
trolley. Make sure the machine does
not tip or fall off during transport.
The machine is designed to operate
in closed rooms and must have
sufficient floor space to operate it
and to have access from all sides.
Floor plan:
GH2260/2280ZX
5.2 Assembly
If you notice transport damage while
unpacking, notify your supplier
immediately. Do not operate the
machine!
Dispose of the packing in an
environmentally friendly manner.
Clean all rust protected surfaces with
petroleum, diesel oil or a mild
solvent.
Unbolt the lathe from the shipping
crate bottom.
Move the tailstock to the tailstock
end of the bed.
Place 2 steel rods of sufficient
strength into 2 holes of lathe bed.
Sling the lathe with properly rated
straps ( Fig 3)
Fig 3
Caution:
The machine is heavy!
GH 2260 ZX 2900 kg
GH 2280 ZX 3145 kg
Use great care.
Assure the sufficient load capacity
and proper condition of your
lifting devices.
Never step underneath suspended
loads.
Use a machinist’s precision level on
the bed ways and check to make
sure that the lathe bed is level.
The lathe bed must be level to be
accurate.

4
5.3 Mains connection
Mains connection and any extension
cords used must comply with
applicable regulations.
The mains voltage must comply with
the information on the machine
licence plate.
The mains connection must have a
16 A surge-proof fuse.
Only use power cords marked
H07RN-F
Connections and repairs to the
electrical equipment may only be
carried out by qualified electricians.
Connection takes place on the
terminal box on the back of the
machine.
5.4 Initial lubrication
The lathe must be serviced at all
lubrication points and all reservoirs
filled to operating level before the
lathe is placed into service!
Failure to comply may cause serious
damage to the lathe!
(see chapter 8 for lubrication).
After one month of operation the
oil must be changed on
headstock, gearbox and apron.
The coolant tank has to be filled with
coolant (see chapter 8.7)
5.5 Starting operation
Before starting the machine check
the proper chucking (see chapter
6.2).
Turn ON the main power switch
(located on the electric box at the
rear of the machine).
You can now start the machine with
the forward/ reverse lever (A, Fig 4).
Fig 4
Push the lever
- right and down for forward rotation
-right and up for backward rotation.
Return the lever to its 0-position to
stop the machine.
The spindle jog button (D, Fig 6)
advances the spindle momentarily.
The foot break will stop all lathe
functions and break down the spindle
rotation.
Attention:
Lathe still has electric power.
The emergency stop button (C, Fig
6) stops all machine functions.
Attention:
Lathe still has electric power.
Turn emergency stop button
clockwise to reset.
5.6 Break in procedure:
To allow time for the gears and
bearings to break-in and run
smoothly, do not run the lathe above
560 rpm for the first 6 hours.
6. Machine operation
Warning:
Setup work may only be carried
out after the machine is protected
against accidental starting.
With pressed emergency stop
button.
Measurements and adjustments may
be carried out when the machine is
at a standstill only.
Check the save clamping of the work
piece before starting the machine.
Never stop the rotating chuck or
work piece with your hands.
Never place your fingers in a position
where they could contact any
rotating parts or chips.
Remove cutting chips with the aid of
an appropriate chip hook when the
machine is at a standstill only.
Always close the chuck guard and
pulley cover before you start the
machine.
Choose a small spindle speed when
working unbalanced work pieces and
for threading and tapping operations.
Never cut magnesium-
high danger to fire!
In case of danger step on the foot
break and press the emergency
stop button.
6.1 Controls
Fig 5
A….Foot break
B….Micro stop for carriage
C….Bed cover (remove for cleaning)
Fig 6
A….Coolant On/Off switch
B…. Spindle jog button
C….Emergency stop button
D…. Power indicator light
(shows that electric power is
on)
E….Feed reversing lever
F….Sindle speed levers
H….Feed / Lead selector levers
F, D…for feed rod
E, C…for lead screw
Fig 7
A…..Cross slide lock
C….Longitudinal Travel Hand Wheel

5
D…..Half-Nut Lever (thread cutting)
E…..Automatic Feed Lever
longitudinal feed…push and
down
cross feed………..pull and up
F…..Adjustable feed clutch
G…..Feed engage lever
H…..Cross slide hand wheel
J……Top Slide Hand Wheel
K…..Tool post clamping lever
Fig 8
A….Tailstock Spindle Locking Lever
B.….Tailstock Locking lever
C….Tailstock Spindle Hand Wheel
D….Tailstock off-set adjustment
6.2 Chucking
Chuck removal:
Before removing the chuck from the
spindle, place board across the bed
ways under the chuck.
Support the chuck while turning three
cam locks ¼ turn counter-clockwise.
Line up the two marks (A, Fig 9) for
removal.
Fig 9
Carefully remove the chuck form the
spindle.
Clean all contact surfaces.
Lift the chuck up to the spindle nose
and press onto the spindle.
Tighten in place by turning the cam
locks ¼ turn clockwise.
The index mark (A) on the camlock
should be between the two indicator
arrows (B).
If not, adjust the cam studs by
turning them in or out by one turn as
needed.
Tighten cam locks.
Attention:
Never exceed the max speed
limitation of the work holding device.
Jaw teeth and scroll must
always be fully engaged.
Otherwise chuck jaws may
break and fly off in rotation
(Fig 10).
Fig 10
Avoid long workpiece extensions.
Parts may bend (Fig 11) or fly off
(Fig 12).
Use tailstock or rests to support.
Fig 11
Fig 12
Avoid short clamping contact (A, Fig
13) or clamping on a minor part
diameter (B).
Fig 13
Face locate the workpiece for added
support.
6.3 Tool setup
The cutting angle is correct when the
cutting edge is in line with the centre
axis of the work piece. Use the point
of the tailstock centre as a gauge
and shims under the tool to obtain
the correct centre height.
Use a minimum of two clamping
screws when installing the cutting
tool to the four way tool post.
Avoid big tool extensions.
6.4 Spindle speeds selection
The correct spindle speed depends
on the type of machining, the cutting
diameter, the material to be
machined and the cutting tool.
These are recommended max.
speeds for a 50mm cutting diameter
with carbide (HM) tools:
Aluminium, brass 1500 RPM
Cast iron 1000 RPM
Mild steel 800 RPM
High carbon steel 600 RPM
Stainless steel 300 RPM

6
If high speed steel (HSS) tools are
used about 5 times lower speeds
must be chosen.
Generally speaking, the larger in
relation the cutting diameter, the
smaller the possible RPM.
For example:
Turning mild steel at a diameter of
25mm allows a speed of
1600 RPM max. with carbide tool
320 RPM max. with HSS tool
To change the spindle speed:
The speed may never be changed
when the spindle or motor are still
running.
Move the speed select levers (F, Fig
6) according to the speed you desire.
It may be necessary to turn the chuck
by hand to help the gears to engage.
6.5 Turning with auto feed
Several automatic longitudinal and
cross feeds are readily available by
selection on the gearbox handles
(E, F, H, G, Fig 14).
Fig 14
The feed direction can be chosen
with the feed reversing lever (A, Fig
14).
Move the lever (D, Fig 15):
- in and down longitudinal feed.
- out and up for cross feed.
Fig 15
The correct feed depends on the
material to be cut, the cutting
operation, the type of tool, the
rigidity of the work piece
chucking, the depth of cut and the
desired surface quality.
For example:
Longitudinal OD-turning, mild steel of
25mm diameter with a carbide tool at
1400 RPM and with rigid chucking.
Stock removal and roughing cut:
Depth of cut 2mm
Feed per revolution 0,2mm
(change gear box position 4, G and I )
Finishing cut:
Depth of cut 0,5mm
Feed per revolution 0.1mm
(change gear box position 4, G and II
)
Micro finishing and calibration cut:
Depth of cut 0,2mm
Feed per revolution 0.05mm
(change gear box position 4, G and III
)
When roughing big diameters reduce
the depth of cut!
6.6 Thread cutting
Threading is performed in multiple
passes with a threading tool.
Each depth of cut should be about
0,2mm and become less for the
finishing passes.
The threading direction can be
chosen with the feed reversing lever
(A, Fig 14).
Set the feed rate selectors (E, F, G,
H, Fig 14) in proper position.
A) To cut inch and metric threads
Set the machine up for the desired
threading pitch and first depth of cut.
Engage the halve nut (A, Fig 15).
The halve nut must be engaged
during the entire threading process.
- Start the machine at the lowest
spindle speed.
- When the tool reaches the end of
cut, stop the motor and at the same
time back the tool out of the part so
that it clears the thread (Attention
inertia: Stop the motor in time)
- Reverse the motor direction to
allow the cutting tool to travel back to
the starting point.
Repeat these steps until you have
obtained the desired results.
B) To cut metric threads with
threading dial:
On most metric threads the threading
dial can be used.
The halve nut can be opened at the
end of cut, rather than the motor
being stopped and reversed.
The halve nut may only be engaged
at the corresponding graduation
match on the threading dial.
6.7 Drilling operation
Use a drill chuck with MT-4(MT-5)
arbour (option) to hold centring drills
and twisted drills in the tailstock.
For recommended speeds refer to
section 6.4
To eject the drill chuck, fully retract
the tailstock quill.
7. Setup and adjustments
Warning:
Setup and adjustment work may
only be carried out after the
machine is protected against
accidental starting.
Turn off the main switch and
press the emergency stop button!
7.1 Turning between centres
Mount the workpiece fitted with the
drive dog between centres.
The driver is driven by the face plate
(Fig 18).
Fig 18
7.2 Taper turning with tailstock
Turning up to a side angle of 5° can
be achieved by off-setting the
tailstock.
Fig 19