POLIFAN flap discs zirconia alumina Z SGP CURVE STEELOX ★★★★

POLIFAN CURVE flap disc PFR 125 mm X-LOCK width M Z40 SGP STEELOX for steel/stainless steel

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Dia. external
Fillet weld radius
Mounting system
Packaging unit
Technical information
POLIFAN CURVE flap disc PFR 125 mm X-LOCK width M Z40 SGP STEELOX for steel/stainless steel

Zirconia alumina Z
Dia. external
125 mm
Dia. hole
22.23 mm
Fillet weld radius
5 mm
Grit size
Max. RPM
12200 RPM
Mounting system
M (11 mm)
Packaging unit
10 pieces

Special Line SGP tools are specially developed for specific tasks and offer the user key advantages over conventional products. Furthermore, the Special Line SGP includes tools that offer ultimate economic efficiency thanks to their particularly high performance during use.

The POLIFAN-CURVE flap disc has been specially developed for work on fillet welds. It is the only flap disc in the world that has flaps on both the grinding side and on the rear side, as well as on the radius.

PFERD’s POLIFAN CURVE is patented in many countries across the globe.

High-performance flap disc for maximum stock removal on steel and stainless steel (INOX).

The Bosch X-LOCK system for angle grinders enables you to change tools quickly and easily. Instead of a round centre hole, the X-LOCK system features an X-shaped contour, which allows the tool to be fixed on the angle grinder in a form-fitting manner. This means different kinds of tools can be clamped in a reliable manner in a very short space of time. The unique system meets the highest of quality and safety standards and can withstand rough and harsh application conditions. X-LOCK from Bosch is the world's first quick-changing system for angle grinders: Position the tool in the X-LOCK holder, click it into place – and you're ready! It's never been so easy to change accessories on angle grinders. X-LOCK is creating a new standard which makes professionals’ lives easier and increases their productivity. Bosch Power Tools relies on strong partners like PFERD. PFERD has developed the principle for connecting the X-LOCK punched part with the bonded abrasive, flap discs and brushes and created the conditions to enable them to be produced industrially.

  • Outstanding tool life when working on fillet welds and high stock removal rate, ensuring fast working and lower production costs.
  • Excellent tool life when working on fillet welds.
  • Precise and optimum grinding of the fillet weld geometry.
  • With X-LOCK arbor for quick and easy tool changing.
  • Secure fixing as the tool audibly clicks into place.
  • POLIFAN flap discs with X-LOCK can also be used on traditional angle grinders with M14 and 5/8"-11 threads.
Recommendations for use
  • After the circumference has worn down, can continue to be used as a conventional flap disc.
  • For fillet weld radii > 5 mm or weld seam thickness (throat thickness 'a') ≤ 6 mm with 90° joint, width at the radius: 11 mm
  • Place the tool on the X-LOCK quick-change system of your angle grinder and secure it by lightly pressing it down. The tool will audibly click into place.
  • Loosen the tool by actuating the lever.
Materials that can be worked
Stainless steel (INOX)
Work on fillet welds
Work on weld seams
Drive types
Angle grinder
Drive spindle


recommends POLIFAN-CURVE flap discs to achieve perfect results as quickly as possible.


recommends POLIFAN-CURVE flap discs to sustainably reduce the vibration, noise and dust produced during use and to perceptibly improve comfort when working.


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