Bullard 37636 Flap Disc Type 29 4.5 Inches 60 Grit Zirconium

Product Description

The BULLARD 37636 is a Type 29 high-profile zirconium flap disc engineered for aggressive metal grinding and finishing. The Tornado-Z design features overlapping abrasive flaps bonded to a fiberglass backing plate, delivering a consistent cut rate with reduced heat buildup at the work surface. At 4.5 inches in diameter with a 5/8-11 threaded arbor, it mounts directly to standard angle grinders. The 60-grit zirconium abrasive is well suited for stock removal on ferrous metals, weld blending, and surface preparation before coating or inspection. Rated to 13,200 RPM, the disc maintains structural integrity at full grinder speed. Metal fabricators, pipefitters, ironworkers, and maintenance welders are the primary users of this disc.

This flap disc is designed for metal grinding and finishing applications across fabrication shops, structural steel work, pipeline work, and general maintenance environments. The Type 29 conical profile concentrates contact pressure at the disc edge, making it effective for aggressive weld removal and blending on flat and contoured surfaces. It fits any angle grinder equipped with a 5/8-11 spindle, which covers the majority of 4.5-inch grinders used in the trade. Discs are sold per each, with a box quantity of 10 units available for stocking purposes.

Key Features

• Type 29 high-profile conical design concentrates cutting pressure for aggressive stock removal
• Zirconium abrasive grain delivers fast cut rate with extended disc life on ferrous metals
• 60-grit configuration balances material removal speed with surface finish quality
• 4.5-inch diameter with 5/8-11 threaded arbor fits standard angle grinders
• 13,200 RPM maximum speed rating matches full-load grinder operating speeds
• Fiberglass backing plate provides structural support and vibration damping during use

Compatibility

Designed for use with 4.5-inch angle grinders equipped with a standard 5/8-11 threaded spindle. Suitable for metal grinding and finishing on ferrous materials including mild steel, structural steel, and weld beads.

Installation Notes

Installation is performed by qualified tradespeople familiar with angle grinder safety practices. Verify the grinder's rated RPM meets or exceeds the 13,200 RPM disc rating before mounting. Inspect the disc for cracks or damage before each use and never use a damaged disc. Wear appropriate PPE including a face shield, gloves, and hearing protection whenever operating angle grinders with abrasive flap discs.

Technical Specifications

• Disc Type: Type 29 High Profile
• Abrasive Material: Zirconium
• Diameter: 4.5 inches
• Arbor Size: 5/8-11 threaded
• Grit: 60
• Maximum RPM: 13,200
• Application: Metal Grinding and Finishing
• Box Quantity: 10
• Unit of Measure: Each

Standard Information

• Brand: BULLARD
• Manufacturer Part Number: 37636