Milling with the manual angle grinder substitutes grinding and scrubbing

Milling rings and double-sided milling rings (weld root opener) from MIGAL.CO save time and money and improve the quality during the processing of non-ferrous metals, plastic, GRP / CFRP and wood. 

The removal rate is significantly increased, grinding dust disappears and it does not retain any abrasive residues in the material. The life of a milling ring* approximately corresponds to the use of up to 5,000 conventional grinding discs. Just the resulting savings from disk changing amortize the tool several times. The increase in efficiency and the savings in abrasives cut costs by orders of magnitude.

The milling rings are used for bevelling, smoothing welds and general scrubbing, while the double-sided milling disc is used to open butt- and filletwelds. Especially with aluminium there is no smearing of the material, thereby welding defects are visible immediately. The workpiece remains largely cold and residuals of abrasives are avoided. Thus, the weld quality improves significantly. As residues remain solely chips, work safety is improved and explosion hazards from aluminium dust are avoided.

The tools can be used with commercially available electrically or pneumatically operated hand angle grinders with a speed of 12,000 rev / min and are available in diameters of 70, 116 and 125 mm. Metals such as aluminum, titanium, copper, brass and bronze, as well as plastics, CFRP / GRP and wood can be effectively processed.


  • Milling rings - for bevelling and scrubbing
    Milling rings are available in diameters of 70, 116 and 125 mm. These are used for bevelling, leveling of welds or general scrubbing. Suitable materials are all non-ferrous metals, carbon / fiberglass, plastics and wood.
  • Double-sided milling rings (weld root opener)
    These are also available in diameters of 70, 116 and 125 mm and are used for opening of butt- or filet welds. Suitable materials are all non-ferrous metals, carbon / fiberglass, plastics and wood.

Key features and benefits

  • Commercially available angle grinders
    Milling rings and double-sided milling rings can be used on standard angle grinders under the following conditions:
    • electric or pneumatic driven
    • 12.000 rpm
    • minimum 1,500 watts of power
  • Chips instead of dust
    Chips are produced instead of dust. This is a significant contribution to work safety. The explosion hazard caused from aluminum dust is eliminated.
  • No abrasive residues and no smearing
    Especially with aluminum no plastic-bonded abrasives may be used due to the fact that these leave residuals in the material. Such residuals may cause weld defects like porosity or inclusions after rewelding. With milling such residuals are excluded. Weld defects are visible immediately and the smearing caused by grinding is avoided.
  • Cold workpiece
    With milling the workpiece remains cold. Overheating is avoided.
  • Higher profitability
    The removal rate is significantly higher than with conventional milling discs. Thus, the work processes are more efficient. Frequent tool changes are eliminated due to the fact that the lifetime before first resharpening is up to 500 hours* (in comparison to 30 minutes)

Milling rings can be resharpened 5 to 7 times

After an operating time of up to 500 hours* our milling rings can be resharpened 5-7 times

Occupational health

Our milling discs and double-sided milling discs with a diameter of 116 and 125 mm have been certified by MPA Hannover according to EN 847-1.

The certification is valid for speeds up to 13,000 rpm.

The issued certficate has the number Z-13225/14.

Primary importer for the US, Canada and Mexico

In.motion technology distribution LLC
Chicago, IL 60657 USA
USA Phone: 312.547.9253
Email.: Gobritz(at)


Our brochure is available for download.

Video instructions

The video shows how the milling ring is mounted to an angle grinder, milling of a bevel, flattening of a weld, opening a filet weld and milling of a notch. 

This video shows the application of 70 mm milling rings single- and double-sided. It contains the assembly of the ring to a machine with flexible shaft, milling a bevel, removing a fillet weld and milling a gap.

*All information regarding the lifetime represent empirical values which have been communicated to us by customers. These are not binding and may differ substantially. Under no circumstances shall this constitute a guaranteed feature!