CGW 42121 is a 4-inch diameter flap disc designed for aggressive material removal on steel surfaces. It features a Type 29 profile with a 5/8-11 inch arbor, enabling compatibility with common right-angle grinder spindles. The disc utilizes premium Zirconia Alumina grain mounted on a poly/cotton backing, combining durability with a refined finish. The Zirconia concentration is designed to deliver high stock removal while maintaining a durable edge, and the active grinding aid is intended to reduce heat buildup during use, which can help manage workpiece temperature and extend grinding life under light pressure.
This wheel arrangement is intended for heavy-duty and aggressive grinding applications where rapid material removal is desired. The 36-grit size provides a balance between aggressive cutting action and smoother finishing compared to coarser grits, making it suitable for initial material removal stages on steel. The disc is packaged as an individual item with a box quantity of 10, offering convenient stocking and easy replacement in shop environments. Practically, users should expect higher material removal rates with good wear resistance, while applying appropriate pressure to avoid excessive heat or glazing of the abrasive surface.
When selecting this flap disc, ensure compatibility with your grinder’s arbour size (5/8-11 in this case) and confirm the regulator’s RPM rating remains within the disc’s maximum operating speed of 15,300 RPM. Regular inspection for disc wear and following standard safety procedures for wheel guards and personal protective equipment will help maintain safe operation during fabrication or maintenance tasks.
Features:
- Premium Zirconia Alumina grain on poly/cotton backing for durability and finish
- High stock removal with zirconia concentration
- Fastest stock removal in the marketplace for steel applications
- Recommended for aggressive use and heavy duty applications
- Active grinding aid provides cool cutting with light pressure
- 4" diameter, 5/8-11" arbor, Type 29, 36 grit
- Grain:
- Zirconia
- Dia:
- 4
- Arbor/Shank Size:
- 5/8-11
- Type:
- 29
- Grit:
- 36
- RPM:
- 15300
- Package Size:
- Each
- Box Quantity:
- 10
