Maxima GIUNTOMAX User manual

GIUNTOMAX
Use and maintenance manual

3
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine -User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 2/13
CONTENTS
1 FOREWORD ............................................................................................ 5
2.1 OVERVIEW OF THE MACHINE ............................................................... 5
2.2 GENERAL DESCRIPTION OF THE MACHINE ....................................... 5
2.2.1 Technical data .......................................................................... 6
2.3 INTENDED USE ......................................................................................... 6
2.3.1 Overview ........................................................................................ 6
2.3.4 Conditions for storage and handling of the GR ........................ 9
3 MARKINGS AND DECLARATION OF CONFORMITY ......................... 12
4.1 TRAINING AND INFORMATION ............................................................ 12
4.2 PERSONAL PROTECTIVE EQUIPMENT ................................................. 13
4.3 ROUTINE AND EXTRAORDINARY MAINTENANCE ........................... 13
4.4 INFORMATION TO CARRY OUT MAINTENANCE IN A RATIONAL WAY 14
ATTACHMENTS:
ANNEX 1: Air Water Rotary Joint Machine Declaration of Conformity
ANNEX 2: Safety Valve Certification

4
GIUNTOMAX

5
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine - User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 3/13
1 FOREWORD
This document contains the information necessary for the use and maintenance of the AIR/WATER ROTARY
JOINT (hereinafter called GR) machine.
The GR machine was designed and manufactured by Maxima S.p.A, via Matteotti,6 Poviglio (RE).
This manual deals mainly with safety aspects relating to the operation, management and control of the GR
machine as a whole, the management of signals that intervene at global level and the management of
interface signals between the different machines and equipment.
The manual also covers the checks and maintenance required to maintain safety levels, and the types of
work carried out on individual machines, such as commissioning, cleaning, and segregation from energy
sources.
In drawing up this manual, we have followed the indications and contents of the Machinery Directive, the UNI
EN 12100-2 standard and the standards referred to in the Declaration of Conformity and the Machinery
Directive issued by the company itself.
2. Machine description
2.1 OVERVIEW OF THE MACHINE
MANUFACTURER: Maxima S.p.A.
NAME: Air/Water Rotary Joint (GR)
MODEL: n/a
TYPE: n/a
YEAR OF CONSTRUCTION: 2010
2.2 GENERAL DESCRIPTION OF THE MACHINE
(Ref: Directive 2006/42/EC: Annex VII, Part A, par. 1(a), 1st indent).
The air-water rotary joint is designed to be assembled to a drilling machine tool (e.g. core drill, gear motor,
motor) in order to improve machining performance in terms of:
- cooling of the tool during machining,
- debris removal capacity;
- extension of the operating conditions to cooling fluids other than water.
With the use of the Air/water rotary joint it is possible to operate:
- with higher flow rates and working fluid pressures;
- with a working fluid (fluxing fluid) consisting of air, water and/or aerosols.
With reference to the machinery directive, the air/water rotary joint is "interchangeable equipment"
according to the definition in art. 2(2)(b), and as such must be considered a "machine" for all intents and
purposes.
The GR can be used with 3 different types of drilling fluid: water, air and aerosols.
In general, an increase in the flow rate of the drilling fluid improves the cooling effect of the tool, increasing
its life cycle especially on applications with large diameter tools on very hard materials, such as granite,
quartzite and hard quartz sandstone.
An increase in the flow rate of the drilling fluid also increases the drilling speed, improving the potential for
debris removal. This translates into an increase in tool life in terms of linear metres drilled, and an increase
in the drilling depths achievable under the same working conditions and tool diameter.

6
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine - User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 4/13
In fact, the GR has a minimum passage for the drilling fluid with a cross-section of 15 mm compared to the
8-10 mm typical of standard machine adducts, thus increasing the flow rate of the drilling fluid.
In addition, the GR can withstand pressures of up to 12 bar without the seals coming out of their seats or
breaking, whereas the adductors of core drilling machines are only designed to withstand pressures of 2 bar.
The extension of the range of materials that can be drilled with diamond tools in fluxing air is further increased
when a small quantity of water is added to the air in a controlled manner, so as to create an aerosol, as can
be done with the use of the MX2 Vaporizer manufactured by Maxima S.p.A.
It should be noted that once the GR has been assembled to the core drill, the maximum mounting clearance
for the rods is reduced by 125 mm.
2.2.1 Technical data
Length including tab: 313 mm
Width including tap and safety valve: 202 mm
Weight: 3.54 Kg
Noise: 94 dbA at 7 bar
Maximum Torsion Load 1400 Nm
Maximum Thrust 1500 Kg
Maximum Rotational Eccentricity 1 mm
Max. Bending Moment 120 Kgm
Maximum Rotation Speed 1200 rpm
Maximum Drilling Fluid Pressure 12 bar
2.3 INTENDED USE
2.3.1 Overview
2.3.1.1
The GR is supplied complete with a tap to regulate the access of the drilling fluid to
the drilling system, and a safety valve set at a maximum pressure of 4 bar, as
indicated on the label on the valve itself.
2.3.1.2 The safety valve is used to provide a safe exit route in the event of any obstruction
of the drilling fluid exit route.
2.3.1.3 WARN: The 4 bar max safety valve provides a safety guarantee for most, but not
all, applications.
2.3.1.4
For each application, refer to the tables A at the end of this paragraph and assess
the maximum allowable pressure for safe working. Then replace the safety valve
supplied with a valve set to the value required for safe operation.
2.3.1.5
On the outer sleeve there is a steel bar fixed with a screw. As there may be a slow
inertial rotation of the GR outer casing, place the bar on the casing of the core drill
in such a way as to prevent the drilling fluid supply pipe from screwing onto the GR
casing.

7
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine -User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 5/13
2.3.2 Installation of the GR
2.3.2.1 Wear personal protective equipment, such as: dust mask, goggles, gloves, safety
shoes and ear muffs.
2.3.2.2 Operators are authorised to use the GR if they have received specific instructions
on the safe use of the GR under high pressure.
2.3.2.3 CAUTION: the GR can only be mounted on core drills with a 1 ¼" W male thread,
and tools with a 1 ¼" W female connection must be mounted to the GR.
2.3.2.4 Screw the GR onto the core drill spindle to the end of the stroke with the core drill
machine switched off and the drilling fluid line disconnected.
2.3.2.5
Screw the diamond tool onto the male shaft of the GR.
2.3.2.6 Connect the drilling fluid line to the ½" Gas connection located after the safety
valve.
2.3.2.7 Ensure that the throttle valve on the GR is closed, i.e. with the flaps at right angles
to the fluid flow line.
Hole drilling
fluid outlet
Ø20 mm
Threaded shaft 1
¼
" W M for
screwing in tools
Threaded Shaft 1 ¼"
W F for screwing
onto the core drill
machine shaft
Drilling Fluid
Tap
Safety
Valve 4 bar
max.
Drilling fluid inlet
gas 1/2"
Connection
Inertial rotation
locking bar

8
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine - User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 6/13
2.3.2.8
Refer to tables A at the end of this paragraph and check that for the tool diameter
in use and the type of feed installed, the maximum pressure that can be developed
is less than the 4 bar of the safety valve fitted.
2.3.2.9 Otherwise, equip yourself with a suitable safety valve and replace the one mounted
on the GR.
2.3.2.10
The GR is equipped with a 10 cm long bar that is placed in contact with the casing
of the core drilling machine so that the slow inertial rotation of the GR casing does
not cause the drilling fluid tube to twist around the GR.
2.3.3 GR use
2.3.3.1
Switch on the drilling fluid source and check
that the pressure is below the
maximum values for safe operation as shown in Table A.
2.3.3.2 Slowly open the tap on the rotary joint with the butterfly flaps parallel to the fluid
flow line, making sure the handwheel is firmly in your hands.
2.3.3.3 Switch on the core drill and turn the handwheel on the core drill, bringing the tool
into contact with the material to be drilled.
2.3.3.4
Caution: when working at pressures of 2 bar or more, you may experience a
counter-thrust on the feed handwheel that pushes the core drill out of the hole.
Adjust the flow of drilling fluid by turning the tap on the GR if the counter-thrust
becomes difficult to counteract.
2.3.3.5 If it is necessary to dismantle the tool during drilling, close the drilling fluid tap and
switch off the core drill.
2.3.3.6 Use a size 41 spanner and by inserting it into the spanner on the GR shaft, lock its
rotation on a contrast. Use another spanner and the tool and unscrew it.
2.3.3.7
Then re-screw the tool onto the GR shaft and put the tool back into the bore.
2.3.3.8 Hold the handwheel of the core drill firmly, slowly open the drilling fluid tap and
switch on the core drill.
2.3.3.9
Caution: never put your hands on the slide or place any object on it.
2.3.3.10 Caution: pay attention if one or more of the following signs occur during drilling:
significant reduction in
the flow rate of the drilling fluid at the inlet; drastic
reduction in drilling speed; progressive increase in counter-thrust.
2.3.3.11 Should one or more of these signs occur, obstruction of the exit route of the drilling
fluid may be in progress.
2.3.3.12 Immediately close the drilling fluid tap, and retract the diamond tool 10 to 20
centimetres, maintaining the rotation.
2.3.3.13 Check that the drilling fluid outlets are clear. If they are partially clogged, turn the
handwheel back and forth about 20 cm repeatedly and then open the drilling fluid
tap while continuing to move the tool back and forth.
2.3.3.14
Ensure that the drilling fluid outlets are clear and proceed with drilling.
2.3.3.15
If the problem persists, remove the tool and check its integrity.
2.3.3.16 CAUTION: when drilling through holes, near the end of the hole (approximately the
last 5 to 10 cm) reduce the air pressure considerably, either by adjusting the
pressure regulator on the MX2 or by closing the GR tap a little.
2.3.3.17 In fact, once the core is completely detached, the pressurised air could project the
core out of the hole and become dangerous.

9
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine - User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 7/13
2.3.3.18 Alternatively, a wooden board can be fixed on the wall opposite the drilling wall at
the exit of the hole, taking possible deviations into account.
Tables A
Manual Advancement
Tool Diameter
(mm)
Maximum Air
Pressure (bar)
Thrust applied to the tool @
Maximum Pressure (Kg)
20-64
12
40-400
65-100
5-10
400
101-120
3.5-5
400
121-150
2-3.5
400
151-180
2
400-500
181-220
2
500-750
221-260
2
750-1050
261-300
2
1050-1400
301-400
2
1400-2500
Automatic Advancement
Tool Diameter
(mm)
Maximum Air
Pressure (bar)
Thrust applied to the tool @
Maximum Pressure (Kg)
20-64
12
40-600
65-100
7-10
600
101-120
5.5-7
600
121-150
4-5.5
600
151-180
2
600
181-220
2
760
221-260
2
760-1060
261-300 2 1000-1400
301-400
2
1400-2500
The boxes in red are those tool diameters for which the counter-pressure force, if any, is greater than
the safety limit with the minimum applied pressure value
2.3.4 Conditions for storage and handling of the GR
2.3.4.1
When you have finished using the GR, disassemble the tool, remove the drilling fluid
line from the GR, and remove the GR from the core drill.

10
GIUNTOMAX
AIR/WATER ROTARY JOINT Machine - User and maintenance manual
Maxima S.p.A.
MUM Air/Water Rotary Joint
Rev: 00
Date
21/06/2010
Pag. 8/13
2.3.4.2
Transport the GR in a box to prevent it from rolling during transport.
2.3.4.3 If the GR is not to be used for a long time, spread a film of oil on the M and F 1 ¼" W
threads with a brush and store the GR wrapped in plastic foil
2.3.5 Mechanical and Hydraulic functional diagram:
2.3.6 Safety Regulations
Only personnel with personal safety equipment, such as safety shoes, goggles, earphones, gloves and
a dust mask are permitted to use the GR;
Assembly and disassembly of the GR and drilling fluid pipe must be carried out with the drill machine
switched off and the drilling fluid source switched off or disconnected.
Assembly and disassembly of the diamond tool must be carried out with the drill machine switched off
and the drilling fluid tap on the GR closed.
In the case of automatic feed, never leave the drilling system running unattended. The presence of the
operator is always required to supervise drilling activities.
When the core drill is switched on, the GR shaft starts rotating. In addition to the safety instructions in
this document, please refer to the safety instructions in the Operation and Maintenance Manual for
the core drilling machine.
When the GR tap is opened, drilling fluid enters the GR and the drilling system. The drilling system
consisting of the GR, the diamond tool and the core drilling machine is therefore subject to fluid pressure.
The use of the GR at pressures above 1 bar exposes operators and third parties in the work area to residual
hazards and risks.
Provide specific training for personnel on the safety precautions to be taken listed in this operating and
maintenance manual.
Check that the device bears the original CE marking and that this document is contained in the
packaging.
The use of GR at high pressures can produce a counter-thrust on the core drill which the operator will
experience as a force pushing the machine backwards.
In the case of manual advancement, this force may cause the feed wheel to involuntarily rotate and the
core drill to move backwards on the slide.
Always open the tap on the GR slowly and only with your hands firmly on the steering wheel.
Drilling Fluid
Source Rotary
Joint
Diamond Tool
Core Drill Rotary Joint Diamond Tool
Safety
Valve