Norton 662530-48991 Type 27 Grinding Wheel 9x1/4x7/8

Product Description

The NORTON 662530-48991 is a Type 27 depressed center grinding wheel designed for aggressive metal removal in fabrication and maintenance applications. Built with Gemini aluminum oxide abrasive, this wheel measures 9 inches in diameter, 1/4 inch thick, and has a 7/8-inch arbor bore. It is rated to a maximum of 6,600 RPM, making it compatible with standard large-angle grinders. The aluminum oxide grain delivers consistent stock removal on ferrous metals including structural steel, weld seams, and bar stock. This wheel is a go-to consumable for ironworkers, pipefitters, fabricators, and maintenance mechanics working in heavy industrial and commercial environments.

This grinding wheel is suited for use on ferrous metals such as carbon steel, cast iron, and structural steel profiles. Its depressed center Type 27 profile allows the operator to work at a low angle to the workpiece, improving surface contact and reducing fatigue on flat or curved stock. Typical applications include weld blending, surface conditioning, deburring, and flash removal. The 9-inch diameter provides an extended working surface compared to smaller-diameter wheels, allowing faster coverage on larger workpieces.

Key Features

• Type 27 depressed center profile for low-angle flat-surface grinding
• Gemini aluminum oxide abrasive grain for consistent, aggressive metal removal
• 9-inch diameter with 1/4-inch thickness for extended grinding contact
• 7/8-inch arbor bore fits standard large-angle grinder spindles
• Rated to 6,600 RPM maximum operating speed
• Designed specifically for ferrous metal grinding applications

Compatibility

Designed as an OEM-style replacement or standard consumable for large-angle grinders accepting a 9-inch Type 27 wheel with a 7/8-inch arbor bore and a maximum spindle speed of 6,600 RPM or lower.

Installation Notes

Grinding wheel mounting and operation must comply with ANSI B7.1 safety standards for abrasive wheels. Always inspect the wheel for cracks or chips before mounting and perform a ring test per ANSI guidelines. Ensure the grinder is disconnected from power before mounting or removing any wheel. Never exceed the 6,600 RPM maximum speed rating marked on the wheel, and always use the appropriate guard and personal protective equipment during operation.

Technical Specifications

• Wheel Type: Type 27 Depressed Center
• Abrasive Material: Gemini Aluminum Oxide
• Application: Metal Grinding
• Diameter: 9 inches
• Thickness: 1/4 inch
• Arbor Bore: 7/8 inch
• Maximum RPM: 6,600 RPM
• Unit of Measure: Each
• Minimum Order Quantity: 20

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 662530-48991