Norton 66252849366 Type 27 Grinding Wheel 4 in 20 Grit

Product Description

The NORTON 66252849366 is a Type 27 depressed-center grinding wheel designed for aggressive material removal on metal surfaces. Built with aluminum oxide abrasive and a coarse 20 grit rating, it cuts fast and handles heavy stock removal, weld grinding, and surface conditioning. The resinoid bond holds the abrasive firmly through high-stress grinding passes, while the reinforced construction helps the wheel handle lateral and radial loads. Rated to 15,280 RPM, this wheel fits standard 4-inch angle grinders with a 5/8-inch arbor. It weighs 0.26 pounds and measures 4 inches in diameter with a 1/4-inch thickness.

This wheel is suited for professional metalworking tasks including weld bead removal, deburring, and surface prep on steel and similar metals. The Type 27 depressed-center profile provides clearance when grinding near edges, flanges, or flat surfaces where a flat wheel would lose contact angle. It is a single-unit stocked item intended for trade use in fabrication shops, construction sites, and maintenance environments where consistent, heavy-duty grinding performance is required.

Key Features

• Aluminum oxide abrasive with 20 grit coarse grade for rapid stock removal
• Type 27 depressed-center profile improves clearance on flat and edge grinding applications
• Resinoid bond provides durability under high grinding pressure
• Reinforced construction supports radial and lateral load demands
• Rated to 15,280 RPM for use on standard 4-inch angle grinders
• Medium hardness (Hardness Code P) with semi-friable grain for consistent cutting action

Compatibility

Designed for use on 4-inch angle grinders equipped with a 5/8-inch arbor connection, consistent with standard Type 27 depressed-center wheel fitment requirements.

Installation Notes

Installation and wheel changes should be performed by a qualified operator following ANSI B7.1 safety standards for abrasive wheel use. Always power down and disconnect the grinder before mounting or removing a wheel. Inspect the wheel for cracks or damage before each use and confirm the tool RPM rating does not exceed the wheel maximum of 15,280 RPM. Use the correct flanges and arbor hardware specified for Type 27 wheels.