Mechanical brush­deburring for work­pieces free of burrs

Process-reliable with workpieces free of burrs!

The requirements of workpieces are ever increasing, consequently, the DEBURRING process is becoming more and more important. In addition to the cleaning systems, KNOTH is also offering the deburring process at the same time.

Wherever there is mechanical machining, there will be a formation of a burr. During further machining or assembly, this burr can result in risk of injury, damage or malfunction of the component.

KNOTH Automation GmbH  not only produces the deburring machine for mechanical brush deburring, but is also responsible for the respective DEBURRING process, which is being determined beforehand in a practical test. With this procedure there will be no nasty surprises when the machine has been completed.

Tools for mechanical deburring:

  • Steel brushes (have an impact effect)
  • Plastic brushes (have an abrasive effect)
  • Burrs (removal of larger primary burrs)
  • Mounted points
  • Fabric washers
  • Flush washers
  • Polishing disks

Deburring brush

With different dimensions of steel or plastic for brush deburring of edges that are difficult to access. The wear is automatically compensated via the control. The brushes are clamped in the machine by means of quick-change systems.

Internal deburring brush

Internal deburring by means of brushes, to compensate the wear of the brushes, new brushes are supplied via a magazine. For larger inside diameters, the wear can also be compensated by means of automatic correction via the control.


For pre-deburring of interlocks and removal of large primary burrs. The burr is picked up by an electric high-frequency milling spindle, enabling it to operate with different speed. The burr follows the interlocking or can be positioned on an edge to be deburred in a targeted way.


It is necessary to perform a test beforehand with regard to workpiece cleaning, which also applies to deburring. As it is very difficult to evaluate a burr, at least one practical test is performed by KNOTH for almost 100% of each project, which proceeds as follows:

  • Customer sends workpiece with burr
  • KNOTH application engineer prepares the test, selecting the appropriate tools
  • The test is performed independently or with the customer present
  • Logging of the test with respective measurement report
  • Return of the (deburred / machined) workpieces for evaluation by the customer

The performed tests enable KNOTH Automation GmbH to confirm the requested qualities and cycle times.

Wear compensation

Together with SEMA Maschinenbau GmbH, KNOTH Automation GmbH provides a control system with wear compensation. The wear of the tools is automatically compensated via the machine control. This can occur in different ways:

  • Empirically calculated values, i.e. the wear burr is entered in the control and an automatic correction occurs
  • Pressure control, here, a pressure value is set in the control with which the tool presses on the component
  • Current consumptions, here, a specific range is determined in which the current is to remain during processing – if it falls out of this range, the NC axis automatically readjusts

Machine types

Dry or wet machining with emulsion or oil is possible for all deburring machines. Preprocessing is crucial here, if the workpiece is wet or damp, it is recommended to also perform the deburring process with the same medium. If the workpiece is dry, the deburring process can also be performed dry for workpieces free of burrs.

All machines can be automated via a gantry, robot, handling and delivery system. KNOTH will draw on the know-how of SEMA Maschinenbau for this purpose.

Used processing units:

  • Deburring or milling spindle
  • High-frequency milling spindles
  • Planetary brush head

KNOTH Z-AIR-O deburr

KNOTH Automation GmbH provides an optimised solution for mechanical brush deburring. Here, the proven KNOTH Z-AIR-O concept is combined with the KNOW-HOW in the field of deburring of SEMA Maschinenbau! The result is a system for simple applications in the field of mechanical brush deburring.

Save money and time! Do not destroy your processing machines with abrasive material of the deburring process or your production output with increased cycle times!
Outsource mechanical brush deburring!

Z-AIR-O deburring properties:

  • Universally usable, simple and compact design
  • Optimum cost/benefit ratio
  • Deburring in the area of grooves, threads, interlocking etc.
  • Clamping between points, pre-storage on prisms
  • Standard component length up to 500 mm
  • Automatic loading (gantry loader)
  • Only usable in a safety area (barrier)
  • Optionally with own control and additional axes for more areas of application
  • Applications: almost all rotary parts possible, i.e. rotor shaft, e-mobility, camshaft etc.

Arguments in favour of mechanical deburring:

  • Flexible in the machining of workpiece families
  • Cost-effective process
  • Process reliability
  • Exact edge break (in hundredths range)
  • Short machining times, standard tools, low setup costs, no or short retooling times, fast tool changeover with quick-change systems

Typical workpieces / applications for mechanical brush deburring:

Automotive (truck / passenger car)

  • Motor: Crankcase, cylinder head, crankshaft, camshaft, connecting rod, balance shaft, turbocharger, pump housing, pump impellers, valve housing etc.  
  • Gear unit: Clutch housing, gear case, countershaft, drive shaft, gear shaft, gear wheels, shifting fork, shift lever, CV transmission shafts etc.
  • Steering: Steering rack, steering gearbox etc.
  • Drive: Drive shaft, calliper, cardan shaft etc.
  • Chassis: U-joint crosses, wheel carriers, servo pump, pin fork, track rod end etc.
  • Body: Chassis parts, special section tubes, air conditioning compressor elements etc.
  • E-mobility (electric motor): Rotor shaft, stator, motor housing, battery compartments, electrical connecting elements

White goods / household goods

  • Pump elements, compressor elements, compression elements etc.

Large-scale production parts & precision parts

  • Hydraulic components, hydraulic valve blocks, valve technology etc.
  • Rotor for screw compressors