CGW 42146 4" X 5/8" Type 27 120-Grit XL Z3 Zirconia Flap Disc

The CGW 42146 4" X 5/8" Type 27 120-Grit XL Z3 Zirconia Flap Disc is designed for heavy-duty material removal on steel surfaces. This 4-inch flap disc uses a zirconia-alumina grain with a poly/cotton backing, combining durability with a productive finish. The zirconia concentration supports higher stock removal rates while the XL (extra-large) format provides extended grinding life, making it suitable for aggressive applications where faster material removal is desired.

Key construction features include a Type 27 grinding angle for versatile contouring and access to curved surfaces, and a 5/8-11 inch arbor that fits standard grinders. An active grinding aid is incorporated to help maintain cooler cutting under light pressure, which can reduce heat buildup and prolong disc life during prolonged use. The 120-grit specification indicates a balance between fast material removal and a reasonable surface finish, appropriate for initial stock reduction and deburring tasks on steel and related metals.

In practical terms, this disc is intended for aggressive use in industrial settings where frequent, high-rate material removal is needed. Operators should use light pressure and steady motion to leverage the cooling aid and minimize heat transfer to the workpiece. The packaging lists each disc individually with a box quantity of 10, providing convenient stocking and replacement. Always verify compatibility with your grinder’s arbor size and ensure proper safety equipment is used during grinding operations.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing
• High stock removal for steel applications
• Active grinding aid for cool cutting with light pressure
• XL Z3 configuration for aggressive use
• Type 27 wheel design for contour grinding
• 4" diameter with 5/8-11" arbor
• 120-grit for fine-to-medium finishing