Crack Detectors

We offer magnetic crack detectors also known as bar crack detectors which helps one to detect cracks in metals and metal products thus ensuring quality. These magnetic or bar crack detectors have the following advantages:

• Saves waste of labour and machine time on a defective raw material.
• Pinpoints, which operation causes problem and can establish process system.
• Ensure product reliability.
• Avoid rejection at customer's site and transportation charges.
• Customer satisfaction and company's goodwill stands good.
• Reduction in material cost.
• Finds all surface and near surface cracks and other similar discontinuities in any Ferro-magnetic materials

The bar or magnetic crack detectors are of current and coil type, are to be tested is magnetized by passing a heavy current through it or by making it the core of a coil through which a heavy current is passed. Cracks or inclusions cause the magnetic flux to break the surface forming free magnetic poles. When the component is sprayed with a suspension of finely divided magnetic particles they collect at the free poles to visibly show the presence of defects.

Electro-Magfield Controls & Services have manufactured these magnetic crack detectors series taking care of the customer's full requirement and satisfaction.

We manufacture magnetic crack detectors. These are available in current and yoke type.

Features:

• Meets pertinent military specifications.
• AC Magnetization locates surface discontinuities.
• HWDC. Magnetization locates Sub-surface discontinuities.
• Change over switch with pneumatic control from AC to HWDC
• Accurate inspection at manufacturing speed.
• Locates defects before, during and after processing.
• Eliminates waste of machine time & labour on defective components.
• Helps pin point defect causes.
• Rugged heavy-duty construction.
• Integral all welded steel tank and frame.
• Stainless-Steel tank with reverse flow agitation and bath circulation system at extra cost.
• Infinitely variable thyristorised current control.
• Pneumatically operated Headstock contact plates for positive and spark free clamping of parts.
• Combined Magnetization. Both Longitudinal & Circular Magnetization in one setting.
• Digital Ammeters with display and retention facility at extra cost.
• Movable Tailstock with locking facilities
  Analog meter for magnetizing current (Digital optional available).

UA & UAHD Units provide both circular and longitudinal magnetization to locate cracks in all direction.

Circular Magnetization

Parts are circularly magnetized by either passing the current through the part or through a central conductor inserted through the part or through a central conductor inserted through a hole in the part. This is done by clamping the part or the conductor between the contact plates. This results in a circular magnetic field in the part under test. The defects which are visible are perpendicular to the field i.e. longitudinal cracks or cracks which deviate from the longitudinal direction by not more than 45 degree. The ammeter read the amount of magnetizing current used. The current is controlled infinitely from 0 to maximum.

Longitudinal Magnetization

Longitudinal magnetization is accomplished with the part placed between the contact plates. This magnetic field created formagnetic crack detectors is longitudinal. Detectable defects are transverse to the longitudinal field i.e. transverse cracks and cracks deviating slightly from the transverse direction. A Stepless control circuit is used to regulate the flux density.

We manufacture magnetic crack detectors. These are mobile in nature.

Applications:

• The FD-1500 Series to FD-6000 Series operates on 440 Volts, 3 Phase 50 Hz.AC.  The rated outputs (through a pair of 5 Meter long cables and prods) makes the units suitable for heavy-duty services in weld inspection application during fabrication or repair as well as for maintenance inspection of machinery and equipment . These are Mobile Series.
• These units are also ideally suited for low volume production testing applications and for sample inspection on volume runs.  Their compact size of magnetic crack detectors permits passage through narrow shipman ways and their compliance with NAVSHIPS make these units applicable for many shipyard test requirements.

Description:

• These units are self-contained and are housed in rugged aluminum and steel cases.
• Magnetizing cables, in a wide selection of lengths and prod assemblies are available separately. Controls, indicators, either end output terminals or the remote control plug-in receptacle are located on the front pannel for maximum visibility and convenience. The current of magnetic crack detectors control is in steps.  But at extra cost at customer's option stelesss current control with built in automatice demagnetizing facilities can be incorporated. The ammeters show the true magnetizing current in either the A.C or H.W.D.C Mode operation

Operation:

• These units supply both Alternating current and Half-Wave Direct Current. Either dry or wet magnetic particles are used as indicator.
• Operation in H.W.D.C / F.W.D.C.mode permits detection of both surface and near surface defects. The pulsating half-wave magnetizing current increase mobility of the magnetic particles during indication build-up and improves magnetic field penetration into the part for greater inspection sensitivity. False indications are minimized.

We manufacture magnetic crack detectors. These are portable in nature.

Applications:

• The FD portable magnetic particle test units provide an economical, convenient way to inspect wide range of parts for surface and near surface defects. These compact devices supply either Alternating Current or HAlf-Wave D.C Current outputs. Used in conjunction with Flawcheck magnetic particles, both circular and longitudinal surface and near surface irregularities may be quickly detected. After inspection, the parts can be demagnetized.
• The model FD-1000 Series operates on 220 Volts, 1 Phase, & 50 Hz are Portable Series. The rated outputs (througth a part of 3/5 Meter long cables and prods) makes the units suitable for heavy-duty services in weld inspection application during fabrication or repair as well as for maintenance inspection of machinery and equipment.

Description:

• These units are self-contained and are housed in rugged aluminum and steel cases.
• Magnetizing cables, in a wide selection of lengths and prod assemblies are available separately. Controls, indicators, either end output terminals or the remote control plug-in receptacle are located on the front panel for maximum visibility and convenience. The current control is in steps. But at extra cost at customer's option stelesss current control with built in automatic demagnetizing facilities can be incorporated. The ammeters show the true magnetizing current in either the A.C or H.W.D.C Mode operation

Operation:

• These units supply both Alternating current and Half-Wave Direct Current. Either dry or wet magnetic particles are used as indicator
• Operation in A.C mode offers maximum sensitivity and speed in locating surface defects. A.C. operation minimizes background interference, permitting  better signal interpretation and thereby, increased defect identification sensitivity.