Bullard 37624 Flap Disc Type 29 4.5 Inches 40 Grit Zirconium

Product Description

The BULLARD 37624 is a Type 29 zirconium flap disc designed for aggressive metal grinding and finishing. Built on a standard profile with a 5/8-11 threaded arbor, this disc measures 4.5 inches in diameter and carries a 40-grit cut for fast stock removal on steel, iron, and other ferrous metals. At a maximum operating speed of 13,300 RPM, the Tornado-Z construction delivers consistent cut rate and extended disc life compared to standard aluminum oxide flap discs. These are sold in boxes of 10 and priced per unit. Metal fabricators, welders, and ironworkers are the primary users of this type of abrasive disc.

This flap disc is suited for surface conditioning, weld blending, and edge grinding on structural steel, fabricated assemblies, and sheet metal components. The Type 29 conical profile concentrates cutting pressure at the work surface, making it effective for flat-surface grinding and moderate material removal on horizontal or slightly angled work. The 5/8-11 arbor fits standard 4.5-inch angle grinders commonly used in fabrication shops and field welding environments.

Key Features

• Type 29 standard conical profile for flat-surface and angle grinding
• 40-grit zirconium abrasive for fast stock removal and long disc life
• 4.5-inch diameter with 5/8-11 threaded arbor fits standard angle grinders
• Maximum operating speed of 13,300 RPM
• Tornado-Z construction for consistent cut rate throughout disc life
• Sold in boxes of 10 units

Compatibility

Designed for use with standard 4.5-inch angle grinders equipped with a 5/8-11 spindle. Suitable for metal grinding and finishing applications on ferrous materials.

Installation Notes

Installation of flap discs should be performed by qualified personnel following ANSI B7.1 safety standards for abrasive wheels. Inspect the disc for damage before mounting and ensure the grinder guard is in place before operation. Never exceed the 13,300 RPM maximum rated speed marked on the disc. Confirm the grinder is powered off and unplugged before mounting or removing the disc.

Technical Specifications

• Disc Type: Type 29 Standard Profile
• Abrasive Material: Zirconium
• Diameter: 4.5 inches
• Arbor Size: 5/8-11
• Grit: 40
• Maximum RPM: 13,300 RPM
• Application: Metal Grinding and Finishing
• Box Quantity: 10 per box
• Unit of Measure: Each

Standard Information

• Brand: BULLARD
• Manufacturer Part Number: 37624