Product Data Sheet – TWM 42 N

AC Electromagnetic Yoke

The TWM 42 N electromagnetic yoke provides a portable means of creating AC magnetic fields for the detection of surface indications during magnetic particle testing.

The TWM 42 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 N can be used for testing inside vessels, tubes and closed containers. This yoke is also equipped with an exchangeable switch.

TWM 42 A Magnetic Yoke

Features

  • Lightweight ergonomic design
  • Durable rugged construction
  • Oil and abrasion resistant
  • Individual serial number on each yoke

Specification Compliance

  • EN 60204-1: 2006
  • EN ISO 9934-3:2002
  • DIN VDE 0100-410:2007
  • DIN VDE 0100-540:2012

Product Properties

Electrical supply 42 V
Frequency 50 Hz
Pole cross section 28 x 22 mm
Weight of yoke 3.5 Kg
Pull-off strength 17 Kg AC

Applications

Defect location: surface

Ideal for:

  • Field testing
  • Testing inside vessels, tubes and closed containers
  • Spot inspections
  • In-service inspections
  • Weld inspection

Defect examples:

  • Seams
  • Tears
  • Shrink cracks
  • Grinding cracks
  • Quenching cracks
  • Fatigue cracks

Part Number

072301

Dimensions

Dimensions A B C - Tiede Yokes

A: 168 mm
B: 268 mm
C: 158 mm

Dimensions D E F - Tiede Yokes

D*: 285 mm
E: 202 mm
F**: 250 mm

*Minumum pole distance

**Height in straight position

Dimensions G H J - Tiede Yokes

G*: 105 mm
H: 202 mm
J**: 250 mm

User Recommendations

NDT Method
Magnetic Particle Testing
Accessories Isolating transformer (part number 077011)

Carry Case ( part numbers 136001, 136005)

Pole pieces See below
Download this Product Data Sheet as a PDF
Pole attachments for Tiede Yokes

Articulated legs for fillet seam inspection (part number 077004)

Pole attachments for Tiede Yokes

Articulated legs for inspection of angle pieces, tube bends and other uneven areas (part number 077001)

Pole attachments for Tiede Yokes

45° poles for fillet seam inspection (part number 077003)

Pole attachments for Tiede Yokes

Protective poles to safeguard the pole areas (part number 077002)