3M 7100147339 Depressed Center Grinding Wheel T27 4.5in

Product Description

The 3M 7100147339 is a Type 27 depressed center grinding wheel engineered for fast stock removal and long service life in metalworking applications. It measures 4.5 inches in diameter by 0.25 inches thick with a 0.875-inch arbor hole. The wheel is built around 3M Precision-Shaped Ceramic Grain, a self-fracturing mineral that continuously exposes sharp cutting edges instead of glazing over like conventional aluminum oxide or alumina zirconia abrasives. The result is a consistently high cut rate that holds up across the full working life of the wheel. Licensed metalworkers, fabricators, and maintenance welders are the primary installers and users.

This wheel is suited for aggressive grinding tasks including weld grinding, beveling, slag removal, edge chamfering, and heavy stock removal on stainless steel, mild steel, and aerospace alloys. It performs well in both hand-held angle grinder applications and medium-to-high-pressure robotic weld grinding setups where abrasive life and cut consistency directly affect throughput. The single-pack format fits job-site purchasing for targeted applications.

Key Features

• 3M Precision-Shaped Ceramic Grain self-fractures to maintain sharp cutting edges throughout wheel life
• Type 27 depressed center profile supports grinding and edge work at low angles
• 4.5 x 0.25 x 0.875 inch dimensions fit standard 4.5-inch angle grinders
• Effective on stainless steel, mild steel, and aerospace alloys
• Rated for robotic weld grinding at medium and high contact pressures
• Shelf life of 1,095 days from date of manufacture when stored per manufacturer guidelines

Compatibility

Designed as an OEM-style replacement and standard-fitment grinding wheel for 4.5-inch Type 27 angle grinders used in metal fabrication, weld grinding, and general metalworking applications.

Installation Notes

Grinding wheel installation and operation should be performed by trained personnel following ANSI B7.1 safety standards and all applicable workplace safety codes. Before mounting, inspect the wheel for cracks or chips and confirm the grinder spindle speed rating meets or exceeds the wheel's maximum RPM rating. Always secure the arbor flange and guard before operation, and wear appropriate personal protective equipment including a face shield, hearing protection, and gloves. Never use a grinding wheel whose shelf life has expired.

Technical Specifications

• Wheel Type: T27 Depressed Center
• Abrasive Material: Precision Shaped Ceramic
• Diameter: 4.5 inches
• Thickness: 0.25 inches
• Arbor Size: 0.875 inches
• Package Quantity: Single Pack
• Color: Black
• Shelf Life: 1,095 days
• Alternate Part Number: 7100147339-31180

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100147339