120 Grit Sanding Discs: The Perfect Balance Between Cutting and Smoothing

120 grit sanding discs are a versatile choice when you need to move from heavy stock removal into smoother surface preparation. Found in the 5-Inch 8-Hole Sanding Discs, Hook & Loop, Assorted Grit (50-Pack), these medium-grit discs deliver reliable performance across woodworking, metal prep, and DIY projects.

Why 120 Grit is a Key Sanding Step

This grit bridges the gap between coarse sanding with 80 grit and finer finishing grits like 180 or 220. It smooths rough cuts and scratches while still removing material efficiently, making it one of the most commonly used grits in workshops.

Best Uses for 120 Grit

• Furniture Prep: Smooths rough sanding marks before finishing passes.
• Cabinet Work: Creates even surfaces for paint or primer application.
• Metal Preparation: Cleans and levels surfaces before primer.
• Plywood or MDF: Smooths engineered boards for cabinetry or shelving.

Tools & Setup

• 120 Grit Sanding Disc from the 50-Pack
• Random orbital sander with hook & loop pad
• Dust collection or shop vacuum
• Safety glasses and dust mask

Step-by-Step: Using 120 Grit

1. Start with 80 Grit: Remove heavy coatings or uneven surfaces.
2. Switch to 120 Grit: Attach the disc and align the 8-hole dust pattern.
3. Sand in Even Passes: Use overlapping strokes without pressing down.
4. Check Surface Quality: Make sure coarse scratches are fully removed.
5. Move to 180 Grit: Transition smoothly to prepare for finishing.

Pro Tips

• Vacuum between grit changes to avoid dragging coarse particles across the surface.
• Keep the sander moving to prevent swirl marks.
• Replace discs as soon as the cut slows down for consistent results.

Common Mistakes

• Skipping 120 Grit: Can leave deep scratches that show under finishes.
• Using Alone: Doesn’t leave a surface smooth enough for final finishing.
• Too Much Pressure: Can burnish wood or wear discs prematurely.

FAQs

• Can 120 grit be a final sanding grit? Works for paint prep, but finer grits are better for stain or clear coats.
• Can I use it on metal? Yes, excellent for cleaning and leveling before primer.
• Is it good for drywall? Not ideal—use finer grit for finishing drywall seams.

Watch 120 Grit in Action

For a dependable middle step that balances material removal with surface refinement, 120 grit sanding discs are a workshop essential. Stock the 5-Inch 8-Hole Sanding Discs (50-Pack) and achieve professional-grade results with every project.