Bullard 36624 Flap Disc Type 29 Zirconium 4.5 in 40 Grit

Product Description

The BULLARD 36624 is a Type 29 zirconium flap disc designed for metal grinding and finishing applications. It features a standard profile with a 4.5-inch diameter and 7/8-inch arbor hole, running at a maximum rated speed of 13,300 RPM. The 40-grit zirconium abrasive provides aggressive stock removal on ferrous and non-ferrous metals while still leaving a workable surface finish. This disc is sold in a box quantity of 10, making it practical for shop stocking and job-site use. Metal fabricators, welders, and pipefitters are the typical end users for this type of tooling.

This flap disc is suited for grinding welds, removing mill scale, and blending surfaces on structural steel, plate, pipe, and general metalwork. The Type 29 angled profile concentrates cutting action on the disc edge, making it effective for work on flat stock and contoured surfaces alike. The 40-grit cut level is a common choice for initial weld cleanup and heavy material removal before transitioning to a finer grit for finishing passes.

Key Features

• Type 29 standard profile for aggressive edge grinding on flat and contoured metal surfaces
• Zirconium abrasive grain for durable, high-rate stock removal
• 40 grit for heavy weld cleanup and scale removal
• 4.5-inch diameter with 7/8-inch arbor fits standard right-angle grinders
• Maximum rated speed of 13,300 RPM
• Sold in a box of 10 discs for shop and field stocking

Compatibility

Designed for use with standard right-angle grinders accepting a 4.5-inch disc with a 7/8-inch arbor. Verify that the grinder's rated no-load RPM does not exceed 13,300 RPM before use.

Installation Notes

Installation and disc changes must be performed with the grinder powered off and the power source disconnected. Inspect the disc for cracks or damage before mounting and never use a disc that shows visible defects. Ensure the arbor nut is tightened securely using the appropriate spanner wrench. Always wear appropriate personal protective equipment including a face shield and gloves when operating angle grinders, in accordance with applicable ANSI and OSHA standards.

Technical Specifications

• Disc Type: Type 29 Standard Profile
• Abrasive Material: Zirconium
• Grit: 40
• Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Maximum RPM: 13,300 RPM
• Application: Metal Grinding and Finishing
• Box Quantity: 10 per box
• Weight: 0.195 pounds

Standard Information

• Brand: BULLARD
• Manufacturer Part Number: 36624