3M Cubitron II 984F Grinding Belts [1x18, 1x30, 1x42, 2x42, 2x48]

The Coolest, Fastest Cut in the Industry.

Stop fighting heat and start shaping steel with the belt that changed the industry. The 3M Cubitron II 984F isn't just a ceramic belt... it features 3M’s patented Precision-Shaped Grain (PSG) technology. These triangular ceramic grains are engineered to fracture as they wear, continuously exposing fresh, sharp cutting edges.

While conventional belts "plow" through metal (generating friction and heat), Cubitron II slices through it. This means you spend less time at the grinder and more time delivering a perfect edge.

Why Precision Sharpeners Choose Cubitron II:

• Cooler Grinding: PSG technology diverts heat into the swarf (metal dust) rather than your blade, protecting the temper and heat-treat of your steel.

• 4x Longer Life: Designed to outlast standard belts by up to 400%, saving you money and reducing belt changes mid-project.

• Consistent Scratch Pattern: Because the grains fracture uniformly, you get a predictable finish that makes your grit progression significantly easier.

• Reduced User Fatigue: The belt does the work. You don’t need to lean into the grinder to get the belt to "bite," allowing for more control and precision.

Technical Specifications:

• Mineral: 100% 3M Precision-Shaped Grain (Ceramic).

• Backing: Heavyweight YF-weight polyester (Waterproof for wet/dry use).

• Bonding: Resin bonded for high-heat resistance.

• Joint Type: High-strength film join (Bi-directional).

• Application: Ideal for heavy profiling, bevel grinding, and high-pressure metal removal on stainless, carbon steel, and cobalt alloys.

Pro-Tip from the Bench: To get the most out of your Cubitron II, don't be afraid to apply a little pressure. These grains are designed to fracture under load. If the belt feels like it's "glazing," grab a piece of hardened scrap steel and apply slight pressure to "refresh" the cutting surface and reveal the next layer of PSG points. I personally use a diamond tip truing tool.

Machine Compatibility:

• 1x18: Work Sharp Ken Onion Blade Grinding Attachment (not the base Ken Onion sharpener)
• 1x30: Harbor Freight / Central Machinery 1x30, BuckTool 1x30, Rikon 50-161VS, KFMK and Vevor 1x30 sanders
• 1x42: Viel 1x42, Kalamazoo 1SM, and Grizzly, Rikon, Jet and Craftsman 1x42 belt/disc sanders
• 2x42: BuckTool BG2600 and BS242V
• 2x48: Kalamazoo BG248

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