3M Cubitron III 1184F Grinding Belts [1x30, 2x42]

The Next Generation of Heavy Metal Removal

When 3M dropped the official specs on the new Cubitron 3 Cloth Belt (1184F), I couldn't ignore the numbers. these belts run fast and last. 3M’s engineering data boasting up to an 86% faster cut rate over classic ceramic abrasives... yeah, I knew I had to get them on the shelf for those who want to explore the future of blade working belts with me.

Featuring 3M's fully re-engineered Precision-Shaped Grain (PSG), the Cubitron III is built to tackle the toughest jobs on the bench: reprofiling broken tips, grinding out deep chips, and structural thinning on extreme-hardness super steels.

Why 3M Engineered the Cubitron III:

• Re-Engineered Precision-Shaped Grain: Designed with a sharper, triangular ceramic structure that continuously fractures into razor-sharp points as it wears—slicing through tough steel instead of plowing or rubbing.

• Cool-Running Thermal Control: Formulated to run cooler under pressure, helping reduce heat buildup and protecting temper on critical blade edges.

• Aggressive, Low-Pressure Cutting: Designed to bite into hard metal with less physical effort, saving operator fatigue during heavy grinding sessions. I'm excited to put this to the test.

• Heavy-Duty Backing: Built on a durable YF-weight cloth backing designed for maximum edge stability during intense profiling work.

Recommended Workflows & Grit Options:

• 36+ Grit (Heavy Stock Removal): The ultimate hogging belt. Use this strictly for massive metal removal, repairing deep chips, or grinding/shaping entirely new geometry.

• 60+ Grit (Reprofiling & Bevel Shaping): Ideal for setting clean profile lines, refining heavy grinding marks, and shaping primary bevels on wear-resistant super steels.

• 80+ Grit (Bevel Refinement & Heavy Sharpening): Perfect for establishing clean initial apex bevels on thick stock, blending coarse scratch patterns, and prepping edges for fine abrasive progressions. UPDATE: Sam's Mobile Sharpening has reported that he is using grit 80 in place of his Cubitron II 120 due to a similar scratch pattern but longer lasting character of the 3 series.

Technical Specs:

• Model: 3M™ Cubitron™ 3 Cloth Belt 1184F

• Abrasive Type: Re-Engineered Precision-Shaped Ceramic Grain

• Backing: Heavyweight YF-Weight Polyester Cloth

• Target Steels: Extreme High-Carbide Super Steels (CPM Rex 121, CPM MagnaCut, CPM MagnaMax, M390, CPM-S30V), Tool Steels, and Carbon Steel.

Machine Compatibility:

• 1x30: Harbor Freight / Central Machinery 1x30, BuckTool 1x30, Rikon 50-161VS, KFMK and Vevor 1x30 sanders
• 2x42: BuckTool BG2600 and BS242V

Also fits any standard belt sander or grinder that takes these belt sizes.