Product data sheet
magnetic yokes
Our portable hand yokes are the perfect mobile crack detection units, particularly for checking ferromagnetic parts when burn marks or annealing must not occur.
TWM 220 N
TWM 230 A
The TWM 220 N hand yoke is an AC current instrument
that can be directly connected to a 230V AC supply.
Used with our adjustable pole pieces, it is ideally suited for
testing uneven surfaces, tube bends,angle pieces etc.
The TWM 230 A hand yoke is equipped with a switch which
can be replaced when it becomes worn or faulty. It also
has a special switching circuit, meaning that the yoke is
switched on when the AC current is passing through zero,
thereby greatly extending the life of the switch and the yoke.
tWM 42 a/n
JWM 230
The AC hand yoke TWM 42 A/N operates at 42 V supplied
from a separate transformer which is connected to a 230 V
AC supply. This satisfies the VDE safety regulations, which
means that the TWM 42 A/N can be used for testing inside
vessels, tubes and closed containers. This yoke is also
equipped with an exchangeable switch.
Ref. No.
Separate transformer
077110
Weight of transformer
7 kg
The hand magnet JWM 230 yoke is small, lightweight, and
easy to use, with an output sufficient to satisfy the majority
of test requirements. It is both 230 V/AC and 12 V/DC (the
DC connection requires a transformer).
Note: The JWM 230 yoke must be operated with a pole
attachment - see next page. When mounted on the yoke,
our articulated pole pieces are designed to extend the
range of test applications and ensure the optimum
development of the magnetic field within the test piece.
Suitable accessories
Ref. No.
Transformer for 12V-DC-operation
077120
Adaptor Cable
077501
Product data sheet
magnetic yokes
KWM 42
YM-5
The cross yoke KWM 42 has two AC yokes displaced by
90° so that both longitudinal and transverse cracks can be
detected in one single operation. Two castors on each
magnetic pole maintain a constant air gap and enable the
yoke to be moved easily over the test surface.Powered by a
3-phase supply through a separate transformer.
Separate transformer
3 x 400 / 42 V / 50 Hz (60% of duty ratio)
Ref. No.
074020
Weight of transformer
23.6 kg
The YM-5 magnet is ideal for the effective magnetization
of components for crack detection, particularly where the
use of electromagnetic yokes is impractical or prohibited for
safety reasons. The hinged arms and rotating angled pole
pieces facilitate the local inspection of a diverse range of
components such as critical welds and automotive parts.
The YM5 has been crafted in Magloy 1 for maximum
magnetic field strength.
pole pieces for JWM 230, TWM 42 A/N, TWM 220 and TWM 230 A
Articulated legs
for fillet seam
inspection
Ref. No. 077004
45° poles
for fillet
seam
inspection
Ref. No.
077003
Articulated legs
for inspection
of angle pieces,
tube bends and
other uneven
areas Ref. No.
077001
Protective
poles to
safeguard
the pole
areas
Ref. No.
077002
Product data sheet
UV lights and accessories
Specifications
TWM 220 N
TWM 230 A
071301
071310
Ref. No.
Conforms to
Electrical supply
TWM 42 A/N
N: 072301
A: 072310
EN ISO 9934-3
KWM 42
JWM 230
YM5
074001
075002
075002
42 V
AC 230 V
DC 12 V
-
BS 6072
230 V
230 V
42 V
28 x 22 mm
28 x 22 mm
28 x 22 mm
27 x 27 mm
23 x 27 mm
32 mm
Weight of yoke
3.2 Kg
3.2 Kg
3.5 Kg
10.8 Kg
3 kg
Pull-off strength
18 Kg AC
18 Kg AC
17 Kg AC
17 Kg AC
2.9 Kg
AC 5 - 16 Kg
DC 20 - 30 Kg
Frequency
50 Hz
Pole cross section
-
> 18 Kg
DIMENSIONS 1
Unit type
A mm
B mm
C mm
D mm1
E mm
F mm2
G mm1
H mm
J mm2
JWM 230
TWM 220 N
TWM 42A/N
TWM 230 A
KWM 42
167
168
168
168
320
270
268
268
268
205
117
158
158
158
195
285
285
285
285
80
159
202
202
202
207
250
250
250
105
105
105
105
159
202
202
202
207
250
250
250
min. pole distance
2
Height in straight position
with adjustable poles: fix mounded at JWM 220, can be mounded to all other TWM unit types (optional)
These details are subject to technical innovations and modifications at any time.
Product data sheet
magnetic yokes
carry case
Carry case made from wear-resistant plastic designed to hold the following:
• 1 AC hand yoke (TWM 220 N, TWM 230 A, BWM 220/12, JWM 220 or
TWM 42 A/N (without transformer)
• 1 portable UV light (for example UV-LED NET 365) with standard tranformer
(not an isolating transformer)
• 1 UV spare bulb (depending on equipment)
• 1 UV spare filter glass (depending on equipment)
• 1 set of pole pieces each
Ref. No. 136001 (case without contents)
Ref. No. 136005 (case without contents but suitable for transportation/storage
of Labino portable UV-lights instead of portable UV-LED lights.)
T +49 (0) 7365 81-0
Version 14.1
Bahnhofstr 94-98, 73457 Essingen, Deutschland
F +49 (0) 7365 81-449 E [email protected]
Faraday Road, South Dorcan Industrial Estate, Swindon, Wiltshire, SN3 5HE, UK
T + 44 (0)1793 524566 F +44 (0)1793 490459 E [email protected]