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Maroon 4-1/2 inch Type 29 flap disc with fiberglass backing and ceramic abrasive

3M

3M Cubitron II 7100104899 Flap Disc Type 29 4-1/2 in 40 Grit

SKU CH-Z3XJ-8VJBY

A Type 29 ceramic flap disc for aggressive grinding on a 4-1/2 inch angle grinder at up to 13,300 RPM

  • Size4.7
  • Product typeSanding Abrasives
  • Ceramic abrasive cuts faster and lasts longer
  • Type 29 angled flaps grind efficiently on contoured surfaces
  • 13,300 RPM maximum speed handles aggressive material removal
  • 7/8 in unthreaded hole fits standard angle grinders
  • Fiberglass backing plate resists flex for consistent finish

3M Cubitron II Flap Disc 4-1/2 in 40 Grit

This 3M Cubitron II flap disc is a coated abrasive designed for grinding and finishing metal surfaces. It features a ceramic grain on a polyester backing with a fiberglass plate for durability. The Type 29 angled face allows effective stock removal and contour blending on angle grinders.

Metalworkers needing fast stock removal on steel

Suited for weld grinding, deburring and edge chamfering on ferrous metals where a coarse 40 grit is required. The closed-coat ceramic construction resists loading during heavy use. Not suited for fine finishing, polishing or work on soft non-ferrous materials where loading would occur quickly.

40 grit ceramic flap disc for coarse grinding

The 40 grit grade defines the aggressiveness and surface profile this disc will produce. It determines material removal rate and the scratch pattern left on the workpiece. Select this grit only when coarse grinding is the explicit goal; finer surface preparation requires a higher grit number.

How it compares

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

Price $10.99
Cheaper than about 70% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand name3M CUBITRON II
Product typeSanding Abrasives
Size & build
Size4.7

Questions about this item

What arbor size fits the 7/8 in unthreaded hole on this Type 29 disc?

The disc mounts on a standard 7/8 in arbor; the unthreaded hole slides on and is secured with the grinder's locking nut.

How do I install the 969F series flap disc on an angle grinder?

Remove the old disc, slide the 4 1/2 in disc onto the 7/8 in arbor, thread the flange nut finger-tight, then snug with the spanner wrench — do not over-tighten.

When should I replace this 40 grit ceramic flap disc?

Replace when the maroon flaps wear down to the fiberglass backing plate or cutting rate drops noticeably; the closed-coat ceramic grain stays sharp longer than conventional abrasives.

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