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Pferd POLIFAN PSF Z-STEEL Flap Disc 4-1/2 Inch 80 Grit Type 29

$20.62/ea $128.90/10 in a pack only $12.89/eaSave 37%

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OVERVIEW

Heavy-Duty Grinding for Professional Welders

When it comes to prepping steel for a weld or cleaning up a finished bead, the Pferd 62220 POLIFAN Flap Disc is a welder's best friend. This 4-1/2" x 7/8" abrasive disc is built tough to handle the rigors of daily fabrication work. Featuring a Type 29 conical profile, the angled flaps provide greater surface contact for aggressive grinding, making it the go-to shape for smoothing out edge welds and working in tight corners. The conical design allows you to apply more pressure for faster stock removal without sacrificing control.

At the heart of this disc is Pferd's premium Zirconia Alumina grain. Zirconia is tougher and more durable than standard abrasives, designed to fracture and self-sharpen as you grind. This means the disc cuts faster and lasts longer, saving you time on disc changes and money on consumables. With an 80 grit rating, this disc is perfect for the "blend and finish" stage. It is aggressive enough to take down high spots and spatter but leaves a smooth enough finish that often requires no further sanding before painting or coating.

The "Steel Superior" designation indicates that this disc is optimized for ferrous metals. It won't glaze over quickly when grinding mild steel or structural iron, maintaining its bite until the flaps are worn down. The backing pad is reinforced to handle the high RPMs of modern angle grinders (up to 13,300 RPM), ensuring safety and consistent performance. Because flap discs are more forgiving than hard grinding wheels, you get a smoother finish with less risk of undercutting or gouging your base metal.

Whether you are in a production welding shop, a maintenance department, or a home garage, having reliable abrasives is key to a quality project. The Pferd 62220 offers the professional-grade reliability you expect from German engineering. It runs smooth, cuts cool, and helps you turn out professional-looking parts with less effort. Upgrade your grinding game with the superior longevity and cut rate of Pferd POLIFAN flap discs.

Additional Information
Brand:Pferd
Diameter:4.5"
Arbor In:7/8"
Grit:80
Used To Grind:Steel
Abrasive Material:Zirconia Alumina
Disc Shape:Type 29 (Conical)
Series:POLIFAN PSF Z-STEEL
Max RPM:13300
Packaging Description:10 in a pack
Bore (in):7/8"

INCLUDED

  • 10 x Pferd POLIFAN Type 29 Flap Discs (4.5" x 7/8", 80 Grit)

APPLICATIONS

  • Weld grinding and blending on steel structures
  • Edge chamfering and deburring
  • Surface preparation for painting or coating
  • Removing mill scale and rust
  • Contour grinding on tanks and vessels
  • Fillet weld finishing

FAQ

Type 29 flap discs are conical (angled), which makes them better for aggressive stock removal and contour work because they provide a better angle of attack. Type 27 discs are flat, making them superior for blending and finishing on flat surfaces.

While Zirconia Alumina can physically cut aluminum, it is not recommended because soft metals like aluminum will quickly clog (load) the abrasive flaps, rendering the disc ineffective. It is best to use discs specifically designed for non-ferrous metals.

80 grit is considered a medium-coarse abrasive. It is finer than 40 or 60 grit, meaning it removes material slightly slower but leaves a smoother finish. It is ideal for blending welds and general surface conditioning.

Standard 4-1/2 inch flap discs, including this Pferd model, are typically rated for a maximum speed of 13,300 RPM. Always check the label on the disc to confirm and ensure your grinder does not exceed this speed.

No, this flap disc comes with an integrated backing plate (usually fiberglass or plastic) that mounts directly to the angle grinder. You do not need a separate rubber backing pad like you would for fiber discs.

Zirconia Alumina discs typically last significantly longer—often 2 to 3 times longer—than standard Aluminum Oxide discs when used on steel, due to their self-sharpening grain structure and heat resistance.

This disc has a 7/8-inch arbor hole, which is the industry standard for 4-1/2 inch, 5-inch, and 7-inch angle grinders in North America.

Yes, Zirconia Alumina is effective on stainless steel, although Pferd offers specific 'INOX' lines that might perform even better for dedicated stainless work to prevent heat buildup. For general use, this disc is acceptable for stainless.