3M 7000121835 Surface Conditioning Flap Disc 4.5 in Ao

Product Description

The 3M 7000121835 is a surface conditioning flap disc designed for blending, deburring, and finishing in a single pass on metal substrates. Built with non-woven aluminum oxide flaps, it delivers a fast cut rate and extended service life. The overlapping flap construction creates multiple abrasive layers that maintain cut consistency as the disc wears. A phenolic resin backing plate cushions the disc against the workpiece, dampening vibration to reduce operator fatigue and minimize tool wear. This disc measures 4.5 inches in diameter with a 7/8 inch arbor and is suited for use with standard angle grinders.

This flap disc is used in fabrication, maintenance, and finishing applications across metal working environments. It performs on aluminum, steel, and titanium substrates, handling tasks from light grinding to surface blending without a tool change. The open web construction responds to surface irregularities and reduces the risk of gouging, making it appropriate for work where finish quality matters. It is commonly used by welders, pipefitters, and metal fabricators in both shop and field settings.

Key Features

• Non-woven aluminum oxide flaps combine deburring, blending, and finishing into one step
• Overlapping flap layers increase durability and sustain cut rate through disc life
• Open web structure conforms to surface irregularities and reduces gouging risk
• Phenolic resin backing plate provides cushion effect and dampens vibration
• Heat-resistant and load-resistant construction for extended use
• Compatible with aluminum, steel, and titanium substrates

Compatibility

Designed as a replacement-style surface conditioning flap disc for use with standard angle grinders accepting a 7/8 inch arbor and accommodating a 4.5 inch disc.

Installation Notes

Installation should be performed by a qualified operator following the grinder manufacturer's mounting instructions. Verify the grinder's maximum RPM rating meets or exceeds the disc's rated speed before mounting. Power down and disconnect the grinder from its power source before changing discs. Inspect the disc for damage before each use and never operate a cracked or delaminated disc.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Disc Type: Flap
• Abrasive Material: Aluminum Oxide
• Backing Plate: Phenolic Resin
• Package Weight: 5 pounds
• Package Length: 23.75 inches
• Package Width: 9.63 inches
• Package Height: 5.13 inches
• UPC: 051115330518

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121835