NARGESA BM25 User manual

INSTRUCTIONS BOOK
PRADA NARGESA, S.L
Ctra. de Garrigàs a Sant Miquel s/n · 17476 Palau de Santa Eulàlia (Girona) SPAIN
Tel. [phone] · [email protected] · www.nargesa.com
VERTICAL BROACHER
BM25

Thank you for choosing our machines
www.nargesa.com

ÍNDEX
1. GENERAL INFORMATION ...................................................................................................... 4
1.1. General dimensions .................................................................................................... 4
1.2. Layout ……………………………………………………………………….……………….. 4
1.3. Description of the machine .......................................................................................... 4
1.4. Identification of the machine ........................................................................................ 5
1.5. General characteristics ............................................................................................... 6
1.6. Description of safety devices ...................................................................................... 7
1.7. Contraindications for the machine usage .................................................................... 7
1.8. Noise caused by the machine ..................................................................................... 7
1.9. Vibrations .................................................................................................................... 7
1.10. Operative working place ............................................................................................ 8
1.11. Assembly of the lever and piston ……………………………………………………… 8
2. TRANSPORT AND STORAGE .............................................................................................. 11
2.1. Transport ................................................................................................................... 11
2.2. Storage conditions ..................................................................................................... 11
3. MAINTENANCE ..................................................................................................................... 12
3.1. General maintenance ................................................................................................ 12
4. INSTALMENT AND STARTING UP ...................................................................................... 13
4.1. Instructions to fix it ......................................................................................................13
4.2. Assembling to reduce noise and vibrations ............................................................13
4.3. Admissible outer conditions .................................................................................... 13
4.4. Connection to power supply ...................................................................................... 13
4.4.1. Changing connection of the converter primary ……………….……………... 14
4.4.2. Adjusting Intensity of engine-keeper ………………….………………………. 14
5. OPERATION MANUAL ........................................................................................................ 15
5.1. Control panel ............................................................................................................ 15
5.2. Methods and stop systems of the machine ............................................................... 15
5.3. Samples to make a correct broaching operation …………….………………………… 16
5.4. Samples to make cotter slots ………………………………..………………..………… 17
6. TABLE OF CHARACTERISTICS OF BRUSHES ................................................................. 18
7. FORMULES FOR BROACHING ............................................................................................ 19
8. ACCESSOIRES ..................................................................................................................... 20
ANEXO TÉCNICO

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VERTICAL BROACHER BM25
1. GENERAL INFORMATION
1.1. General dimensions
1.2. Layout
1.3. Description of the machine
Hydraulic Broaching machine BM25 NARGESA has been fabricated in a welded and mechanized steel
monoblock. It's a machine useful for making notches and keyways in all kinds of pieces: sprockets, pulleys,
gears, etc...
It is also used like a press to unbolt oxidated parts, assembling and dismantling bearings, etc...
BM25 is made according to the European regulations for the manufacturing of industrial machinery

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1.4. Identification of the machine
Side protection
Piston up/down handle
Piston
Control panel
Front protection
Shavings drawer
Electric motor
Hydraulic container
Broach
Thick part
(shim)
Bushing

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VERTICAL BROACHER BM25
1.5. General characteristics
The machine has got an identification plate on one of the sides where it is printed the information about the
manufacturer and the main characteristics of the machine. The plate has got the information detailed
below:
Motor power 2,2 KW / 3 HP
Tensión 230/400V Three-Phase 50/60 Hz
Hydraulic power 10 Tm
Working speed 24 mm/s
Return speed 54 mm/s
Pump Flow 7,5 L
Shank displacement 600 mm
Goosneck 300 mm
Maximum diameter of the piece 600 mm*
Bench dimensions 420x420 mm
Dimensions 747x1240x2400 mm
Weight 790 Kg
* For different sizes, please ask the manufacturer

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1.6. Description of safety devices
The safety devices the broaching machine has got are the ones listed below:
- The door is located at the front part of the machine to prevent from any projected part could injure the
operator. This door has a safety system which only allows any movement of the machine when the door is
closed. Likewise, the machine has a key that activates a Danger light sign when turned and cancels this
device; this option could be used in exceptional cases and under the operator’s responsibility.
1.7. Contraindications for the machine usage
Never fit elements that are not reccomended by the manufacturer.
1.8. Noise caused by the machine
In this machine noise could be considered non-existent, the noise is almost non-existent under a normal
working system. The pump is inside the container which is at the time inside the box that serves as the
stand for the machine. All this minimizes noise and vibrations so the machine has a steady acoustic
pressure level lower than 70dB at the working site.
1.9. Vibrations
Vibrations are almost non-existent, as it has been stated before. The hydraulic pump which is the element
that could have a bit higher level of vibrations, is submerged inside an oil container so vibrations are
minimized. At the same time the oil container is located on silent rubber blocks that produce a higher
muffling of vibrations.

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VERTICAL BROACHER BM25
Operative
working place
1.10. Operative working place
The broaching machine will only be used by an operative at the time who will be placed in front of the ma-
chine, never at a lateral of it because he ought to control the whole set of the machine. Moreover the ma-
chine main protection devices are thought for the frontal use of the machine.
1.11. Assembly of the lever and piston
Before starting to work, it is necessary to set up the activation lever and place the piston in its working posi-
tion.
1. Place the drive lever in its slot and fix it. 2. We fix it with the bolts and the nut.

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5. We start the machine with the main switch
(1), the pump with the green button (2) and can-
cel the safety with the key (3).
6. We carefully press the lever down so that the
rod makes pressure on the table and the piston
get risen. It is necessary to guide the piston with
the hands so that it rises perpendicularly to the
table.
3. Remove the bolts of the support 4. Remove the bolts that fix the piston to the
stand
2 3
1

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VERTICAL BROACHER BM25
7. When the piston is in its highest position, we
fasten the upper fixing bolts
8. With the activation lever we put the piston up
until we can remove the support

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2. TRANSPORT AND STORAGE
2.1. Transport
Transport without lifting will be carried out by a forklift truck. Lifting will be carried out by a crane using the
clamping spots for it.
2.2. Storage conditions
The broaching machine could never be stored in a place that does not fulfil the following requirements:
* Humidity between 30% and 95% without water condensation.
* Temperature from -25ºC to 55ºC or 75ºC for periods of time no longer than 24h (Bear in mind that this
temperatures are just for storage conditions. Performance temperatures are described in chapter 4.3)
* Do not pile up machines or heavy objects above.
* Do not dismantle for its storage.

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VERTICAL BROACHER BM25
Oil level Oil filling cap
3. MAINTENANCE
3.1. General maintenance
- Every 500 hours of use, check the oil level in the tank.
In the front of tank is oil level. In the absence of oil, fill until the level cap show 3/4 full.
- Replace every 2000 hours or every 3 years the hydraulic oil tank
Type: CEPSA HIDRAULICO HM 68

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Star picture
(preset)
For tension 400V
Triangle picture
For tension 230V
4. INSTALMENT AND STARTING UP
4.1 Instructions to fix it
When the machine is put down by a crane it is necessary to place it down correctly so it doesn’t have to be
moved once it is on the floor. In case it is not possible, then a moveable base must be placed below aways
caring for its inclination to avoid any possible turn over.
4.2 Assembling to reduce noise and vibrations
The machine will be fixed on the floor due to its own weight, therefore it needs to be located in a flat and
leveled surface so any possible vibration could be also reduced.
4.3. Admissible outer conditions
* Environment temperature: between +5ºC and +40ºC without exceeding +35ºC as average temperature
within 24 hours.
* Humidity: Between 30% and 90% without water condensation.
4.4. Connection to power supply
In order to cary out the electrical connections of the machine, first make sure it is not plugged to the electri-
cal supply and that there is no tension in any of its pieces.The machine should be connected to only one
source as well as to a proper ground socket to avoid possible accident and keep the equipment saved from
any possible power leaking.
The standard machine is prepared to be connected to a 400V three phased system. In case the supply
three phase tension was 230V a change must be carried out in the connections inside tha machine to
adapt it to that tension.
The machine has a 230/400V three-phased engine that comes star like connected. If the three phase line
tension is 230V it must be connected triangularly. The engine is inside the box that serves as stand for the
machine. The lateral of the machine must be opened and the cover of the engine connection box must be
removed. The engine bobins will be accessible then and it will be possible to carry out the change from
triangle to star connections as it is indicated in the following pictures:
Once the engine bobins connection is finished, the cover of the box connections must be closed as well as
the lateral door by fastening the screws.

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VERTICAL BROACHER BM25
Intensity regulator
4.4.1. Changing connection of the converter primary
Depending on the voltage available at the outlet it will be also required to change the connection of the
converter primary which is fixed to the electrical panel inside the the machine box.
If the machine is connected to a 400V three-phased power supply it is necessary that the power connection
of the transformer primary is made between terminals labeled "0V" and "415V". In case of having a230V
outlet drive, then disconnect the power cord from the terminal "415V" of the transformer primary using a
screwdriver and connect it to terminal "230", right afterwards tighten the clamping screw with the
screwdriver.
4.4.2. Adjusting Intensity of engine-keeper
Depending on the line voltage the current consumption varies the of the machine. It is therefore necessary
to adjust the labor intensity of thermal motor protection. The rangers engine is fixed to the electrical panel
inside the cabinet of the machine.
To adjust the intensity of the engine-keeper simply turn the knob located on the front, using a Phillip
screwdriver, positioning the indicator arrow at the correct intensity.
In case of having a three-phased outlet 400V drive the engine-keeper must be set at an intensity of "2.6A".
On the contrary, in case of having a three-phased outlet 230V drive the engine-keeper at an intensity of
"5A".
If the engine-keeper installed can not be adjusted to the required intensity, it must be replaced by one with
a higher amperage.

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5. OPERATION MANUAL
5.1. Control panel
5.2. Methods and stop systems of the machine
Pump stop: In order to stop only the pump, press the red button “PARO”. With the pump stopped, the
piston movement is cancelled.
Emergency stop: The machine is provided with an EMERGENCIA stop, located in the frontal part.
All functions are neutralized by pressing the EMERGENCY button and so the machine is stopped as well.
Main switch: All functions are neutralized and so the machine is stopped as well.
Main switchAlarm
indicator
Voltage
indicator
Presure
gauge
Pressure
regulator
Tabla de
capacidades
Emergency
stop button
Start/Stop
button
Safety

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VERTICAL BROACHER BM25
Piston up
Piston down
Piston
2nd operation1st operation 3rd operation
(A) Bushing
(B) Thick
(C) Broach
(D) Piece
5.3. Samples to make a correct broaching operation
1 - Place the piece in the middle of the table.
2 - Insert the bushing.
3 - Place the broach in the bushing, lubricate abundantly in order to achieve a perfect broaching opeartion,
especially during the first operation.
4 - Get the piston down from 20 to 40 mm until having the broach inserted in the bushing, then slightly raise
up the piston so the broach recovers its vertical position and then repeat the same procedure 2 or 3 times
until the broach overtakes the piece and it could be taken by the down part of the piece.
5 - It will be necessary to gradually insert 1, 2 or 3 thick parts depending on the broachsince these are the
ones that give the exact depth.
6 - Clean up all steel wool from the broach once the broaching operation is finished (it is very important for
the broach not to be broken).
7 - Causes of an incorrect broaching.
- The use of oil in bad conditions.
- Do not place the broach in vertical position.
- Do not intercalate the piston thrust.
Depending on the carve depth, request 6. TABLE OF CHARACTERISTICS OF BRUSHES

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1. Place the bushing on the
part
2. Place the broach. First
pass With just the broach
3. Get the piston down
4. Place the thick part 5. Place the broach 6. Get the piston down
7. Place the thick part 8. Place the broach 9. Get the piston down
5.4. Samples to make cotter slots
Follow the steps 7, 8 and 9 until achieving the Desired size for the slot.
Examples of works

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VERTICAL BROACHER BM25
6. TABLE OF CHARACTERISTICS OF BRUSHES
6.1. Millimeter keyway broaches

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6.2. Inches keyway broaches

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VERTICAL BROACHER BM25