Download Handbook for Magnaflux Y6 Electromagnetic Yoke - Nov 11

Y6 YOKE KITS
In kit form, the Y6 Yoke is supplied complete
with black magnetic ink, white contrast paint
and a wire brush and duster, all housed in a
strong attractive carrying case.
A light source, attached to one leg of the Y6
Yoke, is activated by the magnetic field and
switches on automatically during testing. Ideal
for darker corners.
Light source for Y6 Yoke – part number
002L115.
HANDBOOK FOR
MAGNAFLUX
Y6 ELECTROMAGNETIC YOKE
L-10 MAGNETISING COIL
Developed for testing shafts, spindles and
similar components.
Features:
Ideal for inspecting for transverse cracks
Components
are
magnetised
and
demagnetised with the same coil
110V operation
Wet or dry Magnetic Particle Inspection
(MPI) method can be used
Footswitch provides continuous control
PART NUMBERS:
001Y022, 001YO20, 001Y004
Magnetic particle colours available:
Dry method – grey, black, red
Wet method – black, red, fluorescent
Handbook for Magnaflux Y6 Electromagnetic Yoke
PREPARED INKS
Certificate of Conformity
Y6 Yoke
Serial number:
Certified that the above item conforms to and meets the
requirements of the following:
EC Directives
Specifications
73/23/EEC
89/392/EEC
91/368/EEC
89/336/EEC (Emissions)
92/31/EEC (Emissions)
ASME V ART7
ASTM E-709
ASTM E-1444
EN-ISO 9934-3
MIL-STD-271
Certificate is issued under the auspices of the Equipment
Product Manager (2011):
Flash point
(°C min)
(PMCC)
Viscosity
@ 21°C
(cS)
Specific
gravity
Particle
size (µm)
Settlement
volume (%V/V)
(as supplied)
93
3.45
0.81
7 to 25
0.12
93
3.45
0.81
2 to 25
0.25
93
3.45
0.81
0.6 to 2.5
2.5
Magnaglo 410HF*
A prepared ink consisting
of Magnaglo MG410 in a
high flash kerosene of low
odour
Magnaglo 14HF*
A prepared ink consisting
of Magnaglo 14A in a
high flash kerosene of low
odour
Magnavis 7HF*
A prepared ink consisting
of Magnaflux 7C in a high
flash kerosene of low
odour
*Available in both aerosol and bulk format
DRY POWDERS
1 Grey
Maximum working temperature 315°C
Magnaflux (A Division of ITW Ltd),
Faraday Road, South Dorcan Industrial Estate,
Swindon, Wiltshire, SN3 5HE, UK.
Tel: +44 (0)1793 524566
Fax: +44 (0)1793 490459
Email: [email protected]
www.magnaflux.com
MAGNETIC FIELD RISK
Persons susceptible to strong magnetic fields, including those with pacemakers, are
advised not to use or approach this equipment without seeking professional advice.
3A Black
Maximum working temperature 230°C
8A Red
Maximum working temperature 175°C
WCP-2 White Contrast Paint
Magnaflux dry powders offer a range of colour to
give good contrast on as wide a variety of
finishes as possible. In the event of contrast not
being ideal for inspection, a thin layer of
Magnaflux WCP-2 White Contrast Paint can be
applied prior to testing.
All powders are of closely controlled particle size
and shape and have desirable magnetic
properties. For best results application should be
as a cloud applied near the surface while the
current is flowing. Excess powder settling out can
be blown off.
Magnaflux WCP-2 is a quick-drying white
contrast paint which can be applied as a thin
coating prior to testing where enhanced contrast
is required.
SPECIFICATIONS
Magnaflux, Magnaglo and Magnavis concentrates, prepared inks and dry powders meet the
requirements of ASTM E-1444 with oil suspended inks and concentrates meeting AMS specifications,
plus appropriate industrial and Government specifications, Certifications are available on request.
TECHNICAL SPECIFICATION
50
110
115
230
50
50
60
50
12
12
AC
15
3.5
3.5
2.3
DC
8.5
8.5
2.5
Weight (Kg) lifted at 140mm pole spacing
AC
10.5
10.5
10.5
10.5
DC
32.0
32.0
Part number
001Y022 001Y004
001Y020
AC Tangential Field Strength in kA/m at the central point between the poles on a 500 x
250 x 10 mm steel plate
Pole spacing
35mm
12kA/m
140mm
2kA/m
250mm
1.4kA/m
USING THE Y6 YOKE
AC voltage (V)
Frequency (Hz)
DC voltage (V)
Supply current (A) in air
The light source and leg assembly, which is activated by the magnetic field, is switched on
automatically during testing. Ideal for dark corners. Part number: 002L115.
Note 1: This Yoke can be supplemented by
a magnetising coil for inspecting
mounted spindles, rear axles and
other light parts for transverse
cracks only.
Note 2: Fluorescent magnetic ink with high
intensity black light improves the
sensitivity of both the Y6 Yoke and
L10 Magnetising Coil
1.
2.
3.
CERTIFIED TEST WEIGHTS
Available for both AC and DC.
AC Test Weight (4.5Kg)
DC Test Weight (18Kg)
Place the Yoke on the workpiece perpendicular to the direction of the cracks. Double
jointed articulated legs can be moved in two directions at each joint.
You can then adjust the spacing between the legs from about 25 to 250mm and
contour the feet to produce a good flat contact point on parts with irregular shapes.
Trigger the switch, apply the inspection medium, either wet or dry, and surface crack
indications form immediately. You can proceed rapidly in a series of steps each
finding cracks in a 150 x 150mm area.
WARNINGS
Part Number: 026T018B
Part Number: 026T018A
4.
5.
DO NOT smoke while performing NDT
DO NOT operate the Y6 Yoke for longer than 3 seconds ON followed by 10 seconds
OFF, that is a 23% duty cycle
If the Yoke is too hot to hold in the bare hand it is a sign that the duty cycle has been
exceeded. Wait for the Yoke to cool before continuing.
DO NOT use any means to permanently operate the Yoke switch
DO NOT use the supply cable to pull, lift or carry the equipment
When the Yoke is switched OFF the magnetic attraction to the tested component will
be weakened and either the part or the Yoke could fall and cause injury
Laminar magnetic iron provides maximum efficiency with light weight. The trigger
switch is easily operated without changing hand positions.
As magnetic contact exists only between the Yoke and the test piece, the switch,
completely enclosed by a rubber gasket, is the only break in the electrical circuit. Thus
arcing on the part itself is impossible.
SAFETY DATA
FLAMMABILITY
The Y6 Yoke is intended to be used in conjunction with appropriate chemicals as a Non
Destructive means of Testing (NDT) for defects, such as cracks, on a wide range of
manufactured components. Some chemicals may produce a flammable atmosphere at the
point of use and it is important that the testing is carried out in a well ventilated place and
that all sources of ignition are excluded.
Good quality NDT chemicals such as Magnaflux magnetic inks and powders are
formulated to minimise the risk of a flammable atmosphere when correctly used.
ELECTRICAL
Ensure that the protective conductor (earth) is continuous from the Y6 laminations through
suitable connections to the electrical supply.
Recommendations:
PARTS LIST
Item
1
2
3
4
5
Description
Cable, 3 core
Bush
Leg/foot assembly
Switch kit:
Switch
Rubber cover
Insulated metal cover
Screws
Cable cover
Part number
001C065
014B027
70617A3
Quantity
3.75 metre
1
2
005K026
1
MAINTENANCE
Before using the Yoke:
17771A3
1
WARNING
DO NOT REPLACE ANY PARTS
RECOMMENDED BY MAGNAFLUX.
A Residual Current Circuit Breaker (RCCB) or Earth Leakage Circuit Breaker (ELCB)
should be used if the Yoke supply is greater than 50V
If the switch area of the Yoke becomes wet with kerosene or water it should be
disconnected from its supply until the area has dried
In damp conditions select either a 42V or 48V Yoke, or a 110V Yoke operated from a
supply that is centre tapped to earth (55V-0-55V)
If the Y6 shows signs of malfunctioning or if cracks appear in the casing, the Yoke
should be removed from service immediately and examined by a qualified electrician.
Cracking is usually caused by dropping the Yoke or by twisting the articulated legs.
WITH
OTHER
THAN
THOSE
Ensure it is physically undamaged
Ensure the cable is free from cuts which expose the wiring
Tighten the articulated joints if they are excessively loose
It is a legal requirement in many countries that the electrical safety of equipment is
checked periodically, commensurate with use, but at least once a year. The basic tests
required are to check the condition and effectiveness of the electrical insulation and the
continuity of the protective conductor (earth). These tests can be performed using as
Portable Appliance Tester (PAT) or Portable Appliance Checker (PAC).