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Weiler 98800 Type 29 flap disc 4-1/2in 40 grit phenolic backing

Weiler

Weiler 98800 Flap Disc Type 29 4-1/2in 40 Grit

SKU CH-BAJR-KRFWT

A zirconia alumina flap disc with 40 grit for aggressive grinding on angle grinders up to 13,000 RPM

  • Size4.5
  • Product typeSanding Abrasives
  • Zirconia alumina grit cuts aggressively on coarse grinding tasks
  • Type 29 angled face maximises surface contact during stock removal
  • 4-1/2 inch diameter fits standard angle grinder spindles
  • Phenolic backing plate resists heat buildup at 13,000 RPM
  • 5/8-11 threaded hole secures disc without extra adapters

Weiler 98800 Flap Disc Type 29 4-1/2in 40 Grit

This zirconia alumina flap disc is built for aggressive stock removal on metal surfaces. It suits welders, fabricators and maintenance technicians who need a coarse 40 grit abrasive for heavy grinding and blending tasks.

13 000 RPM maximum speed with phenolic backing

The disc runs at up to 13 000 RPM on a standard density phenolic backing plate. Zirconia alumina grain resists heat build-up during extended grinding, while the Type 29 angled flaps maintain consistent contact without excessive vibration or loading.

5/8 In. -11 threaded hole for direct mounting

The 5/8 In. -11 threaded centre hole fits angle grinders directly, without a quick-change adapter. This frees up tool changes and reduces stack height, letting operators work in tighter joints and corners where a backing pad would limit access.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 91% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameWEILER
Product typeSanding Abrasives
Size & build
Size4.5

Questions about this item

How do I install the Weiler 98800 flap disc onto my angle grinder, and which step is most often done wrong?

Thread the 5/8 in.-11 centre hole onto the grinder spindle and tighten with the supplied flange nut; the step most often missed is snugging the nut while holding the spindle lock so the disc cannot loosen under vibration.

What maintenance or replacement will the Weiler 98800 flap disc need during its service life?

The zirconia alumina flaps wear down with use; replace the disc once the abrasive surface is exhausted or the phenolic backing shows through, as the disc cannot be resurfaced or re-flapped.

What is the first limit I will hit when running the Weiler 98800 flap disc continuously at high load?

The 13,000 RPM maximum operating speed is the primary limit; exceeding it risks disc disintegration, so the grinder must never run faster than that rating.

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