Festool Granat 5" Disc 320 Grit 100-Pack

Festool’s Granat 320 grit discs deliver ceramic grit technology that self-sharpens and resists clogging — exactly what you need for final finishing work in Montana’s dry, dusty conditions. The hardened aluminum oxide and ceramic grit composition isn’t marketing fluff. These discs genuinely last 5-10 times longer than standard aluminum oxide abrasives, which matters when the nearest supplier might be hours away.

Skip these if you’re roughing out material or doing initial shaping. 320 grit (P320) exists for one purpose: final surface preparation before applying finish. At this grit level, you’re not removing material — you’re perfecting it.

Technical Specifications and Compatibility

The 5-inch (125 mm) diameter fits Festool’s ETS 125, ETS EC 125, Rotex RO 125, and PRO 5 LTD sanders. More importantly, the 8-hole pattern enables Jetstream dust extraction, which actually works when paired with a proper dust collection system.

Specification	Value
Diameter	5 inches (125 mm)
Grit Size	320 (P320)
Abrasive Material	Hardened Aluminum Oxide and Ceramic Grit
Backing Type	StickFix (Hook-and-Loop)
Hole Pattern	D125/8 (8-hole pattern for Jetstream dust extraction)
Package Quantity	100

The Multi-jetstream 2 design isn’t just about dust collection. In Montana’s variable humidity — from bone-dry winters to spring moisture — keeping the disc cool prevents loading and glazing. The special coating prevents clogging on VOC varnishes, which matters more here where low-VOC finishes dominate due to indoor air quality concerns during long winters.

Real-World Performance and Applications

Cabinet makers working with VOC clear coats and varnishes know the nightmare of standard abrasives loading up after three passes. Granat’s special coating actually resists this clogging. You’ll get through an entire kitchen’s worth of doors without constantly swapping discs.

The consistent scratch pattern eliminates the swirl marks that show up under certain lighting — critical for high-end work where clients inspect every surface. These discs handle:

• VOC clear coats and varnishes
• Scratch-resistant coatings
• Hardwood and softwood sanding
• Acrylics and composite materials
• Mineral materials and plastics
• Repair compounds and fillers

The ceramic grit stays sharp longer than aluminum oxide because it fractures to expose fresh cutting edges. That’s not theory — it’s measurable in linear feet of material sanded per disc.

Installation and Best Practices

Installation follows standard StickFix protocol: ensure the sander’s backing pad is clean, align the 8 holes with the backing pad holes, press firmly to secure, and replace when removal rate decreases. Nothing revolutionary there.

What matters is knowing when to use 320 grit. After stepping through 180 and 220, this grit removes the scratch pattern from coarser grits without creating its own visible marks. In Montana’s bright, clear light, surface imperfections show up immediately. This grit level gives you the substrate preparation that premium finishes demand.

Frequently Asked Questions

Are Festool abrasives worth the premium over hardware store brands?

For finish sanding, absolutely. The 5-10x lifespan advantage means fewer disc changes and consistent results across an entire project. For rough work, save your money. But for final surface prep where consistency matters, the ceramic technology delivers.

How does the StickFix system hold up in dusty conditions?

StickFix hook-and-loop backing maintains grip better than pressure-sensitive adhesive discs, especially when sawdust gets between the disc and pad. The system allows multiple disc swaps without losing holding power — useful when switching between grits or checking your progress.

What’s the actual difference between Granat and other Festool lines?

Granat offers the most versatility and longest life, especially on VOC coatings. Rubin 2 works faster on raw wood but lacks Granat’s versatility. Saphir handles aggressive coating removal but only comes in coarse grits. Brilliant 2 was the general-purpose option now largely replaced by Granat.

Does the 8-hole pattern really improve dust collection?

The 8-hole Jetstream pattern paired with a proper dust extractor captures significantly more dust than 6-hole or dustless designs. In enclosed Montana shops where winter ventilation is limited, effective dust collection isn’t optional — it’s a health requirement.