Magnetic Crack Detector Machine for Steel Bars

This equipment is a wet horizontal bench-type unidirectional machine designed to produce circular magnetization for inspecting both bright and black rolled steel round bars. Circular magnetization is achieved by clamping the bar directly between the headstock and tailstock and passing current through it. The machine is specifically capable of detecting longitudinal cracks. The headshot current can be switched between HWDC and AC for the detection of subsurface and surface cracks. The machine operates semi-automatically, with all functions such as loading, spraying, magnetization, demagnetization, and unloading being automatic. The only manual operation required is the inspection.


  • Automatic loading from infeed bench.
  • Automatic unloading from outfeed rollers to separate OK/Reject stacks.
  • Magnetization, spraying, and inspection all on one station.
  • PLC-Based Control. Fully automatic cycle for faster testing.
  • 7 Inch Touch Screen for control.
  • Large Digital Ammeter with Retention.
  • Operator controlled automatic double shot.
  • 50 Program memory to store settings for different diameters.
  • Error displayed on the touch screen for easy diagnostics.
  • Digital, stepless current control.
  • Heavy-duty transformer.
  • Both sides have Pneumatic clamping.
  • Stainless Steel liquid storage tank.
  • Stainless Steel collection tray.
  • Reverse agitation bath system.
  • Continuously movable tailstock with cam lock.
  • Integrated decaying-AC demagnetization with automatic control.
  • Feedback loop-based current control with current failure indicator.
  • Standard make PLC & HMI. Easily serviceable.


Headshot Current CapacityModels staring from 4000A going up to 6000A
Maximum Part Length AccommodationStaring from 5m going up to 10mm
Maximum Part DiameterStaring from 16mm going up to 160mm
Maximum Part Weight1200Kg
Storage Bath Capacity50-150 L
Shot TimeAdjustable from 0.5 sec 2.0 sec
Power Supply3 Phase 4 Wire 415V AC/220V AC
Frequency50Hz or 60Hz
Pneumatic Pressure Required4-6 Kg/cm2
Control Voltage24V DC
Touch Screen Display Size7” Diagonal

Optional features:

  • Automatic rotation of the bar during spraying and inspection.
  • Automatic motorized movement of the tailstock based on the length of the bar.
  • Automatic movement of the overhead UV LED light.
  • Automatic spraying.
  • Fully automatic operation.
  • Utilizes SCR-based digital current control for accuracy and precision.
  • Incorporates a feedback loop to ensure repeatability.
  • Implements a reverse agitation system to keep the powder consistently dissolved in the carrier fluid.
  • Employs pneumatic clamping to ensure spark-free operations.
  • Features a 7-inch Touch Screen for operator comfort.
  • Operates with PLC-controlled functionality for faster and reliable testing.
  • Provides low voltage output for operator safety.
  • Allows operator control of the Poka yoke for the demagnetization cycle.
  • Bright Steel Bars
  • Black Steel Bars

Product models

Horizontal Clamping Models

Model Head Shot Capacity Maximum Bar Length Minimum Bar Length Maximum Bar Diameter Minimum Bar Diameter
MK-40-400-BRT 4000A AC & HWDC 4m 2m 75mm 16mm
MK-50-600-BRT 5000A AC & HWDC 6m 2m 90mm 25mm
MK-60-C-800-BRT 6000A AC & HWDC 8m 2.5m 120mm 50mm
MK-80-C-1000-BRT 8000A AC & HWDC 10m 3m 160mm 75mm
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