Product Description
The light weight electromagnetic yoke is the ideal tool for detection of surface or sub-surface cracks and flaws in any ferromagnetic material. No other low cost, portable equipment offers such versatility in Magnetic Particle Inspection.
Fast and simple to operate, it is widely used with either dry or wet method fluorescent or non – fluorescent magnetic powders, in the testing of welds, automotive or railroad components, machine parts, steel and grey iron castings, forgings and in plan inspection, maintenance and repair.
Technical Specifications
- Input supply – 220V, 50Hz, 1 Ph
- Input current – 2 Amps
- Distance across poles – 0 to 300 mm
- Magnetic field AC – Constant level, DC-Pulsed, infinitely variable.
- Lifting power Approx. 27 Kg. at 100mm spacing HWDC mode.
- Yoke Weight 3.5 Kgs approx.
- Controls On/Off Switch, AC/DC Switch, DC Field intensity potentiometer
AC Electromagnetic Yoke
- Choice of constant level AC or variable intensity, pulsed HWDC for surface or sub-surface flaw detectability.
- Solid state circuity for infinitely variable (stepless) potentiometric adjustment of DC magnetic field.
- Articulated legs to suit differing component contours.
- Interpole distance adjustable from 0 to 300 mm.
- Low power consumption. Current draw at 220V, 1 Phase supply – only 2Amps.
- Extremely strong and intense magnetic field for superior sensitivity.
- Portable & light weight – only 3.5 Kgs.
- Can be used for AC Demagnetization too.
- No risk of sparking or ‘hot spots’ on the job.
- No current flows through the component being tested.
Principles of Operation:
When the yoke is energized, an intense magnetic field is created between the legs. This field can best be described as a multiplicity of invisible line of magnetic force extending across the gap between the legs. As the yoke is applied to the ferromagnetic component, the magnetic circuit is closed and the field enters the part making its passage between the legs at and below the surface. A crack across this field cuts the magnetic circuit, the crack sides become opposite poles of a magnet and a leakage field occurs in the air above the crack. Magnetic Particles are attracted by this leakage field and indicate the location of the flaw.
A.C. Magnetization
- Creates a surface field which only detects surface cracks.
- Particularly useful for inspecting thick and irregular sections for surface defects such as fatigue cracks.
D.C. (Pulsed) Magnetization
Use of Half Wave D.C. Magnetization creates a pulsing magnetic field with penetrates the work piece and detects surface and subsurface (Slightly) cracks. Pulsing improves particle mobility and sensitivity. Can be used for dry and even wet method.
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