Jet 505451 5 Inch Angle Grinder 0.9 Hp 12000 Rpm

Product Description

The JET 505451 is a pneumatic angle grinder designed for cutting, grinding, and surface preparation tasks in demanding trade and industrial environments. Powered by compressed air at 0.9 HP and a free speed of 12,000 RPM, this tool delivers consistent material removal on metal, weld seams, and masonry. The JAT-451 accepts a 5-inch wheel with a 7/8-inch arbor and features a 5/8-inch 11 UNC spindle thread. A spindle lock simplifies wheel changes, and the adjustable wheel cover allows repositioning for different work angles. Air consumption runs at 4 CFM, making it compatible with most shop compressor setups.

The JET 505451 is suited for fabrication shops, maintenance facilities, and job-site metalwork where an electric grinder is not practical or permitted. It connects through a 1/4-inch NPT air inlet and is typically paired with a 3/8-inch ID air hose. The 5-inch wheel diameter handles material stock removal, weld grinding, and edge prep on structural steel, pipe, and plate. Licensed tradespeople and experienced fabricators are the primary installers and operators of this tool.

Key Features

• 0.9 HP pneumatic motor delivering 12,000 RPM free speed for consistent stock removal
• 5-inch wheel capacity with 5/8-inch 11 UNC spindle thread for standard grinding and cutting discs
• Spindle lock for fast, tool-assisted wheel changes
• Adjustable wheel cover for repositioning to match work angle
• Low 4 CFM air consumption compatible with typical shop compressors
• 1/4-inch NPT air inlet with 3/8-inch ID hose recommendation

Compatibility

Designed for use with standard 5-inch grinding and cutting wheels with a 7/8-inch arbor and a 5/8-inch 11 UNC spindle interface. Connects to compressed air systems via a 1/4-inch NPT fitting.

Installation Notes

Installation and operation should be performed by qualified personnel familiar with pneumatic tool safety. Before mounting or changing wheels, disconnect the air supply and verify zero pressure in the line. Inspect wheels for cracks or damage before each use and ensure the rated RPM of the wheel meets or exceeds the tool free speed of 12,000 RPM. Follow applicable OSHA and ANSI B7.1 safety standards for abrasive wheel use.

Technical Specifications

• Wheel Size: 5 x 7/8 x 1/4 inches
• Spindle Thread: 5/8 inch 11 UNC
• Horsepower: 0.9 HP
• Free Speed: 12,000 RPM
• Air Consumption: 4 CFM
• Air Inlet: 1/4 inch NPT
• Air Hose ID: 3/8 inch
• Sound Pressure: 83 dB(A)
• Sound Power: 91 dB(A)
• Vibration Value: 2.4 m/s²

Standard Information

• Brand: JET
• Manufacturer Part Number: 505451