The right tool and sanding disc are essential for better sanding results. Our cordless orbital sander provides the power and control needed for woodworking, polishing, and surface preparation tasks.
However, even the best sander delivers better results when paired with the correct sandpaper grit. Different grit sizes are designed for different stages of sanding, from aggressive material removal to smooth surface finishing. With multiple sanding discs included, our orbital sander helps users handle various tasks efficiently. In this guide, we will explain how different sandpaper grits work and how to use them for better sanding results.
Ecarke Cordless Random Orbital Sander 15000 RPM
Ecarke cordless orbital sander is designed to deliver smooth and efficient sanding performance for a variety of projects, including woodworking, polishing, and surface preparation. Featuring 6-speed variable control from 8,000 to 15,000 RPM, it allows users to adjust the sanding speed based on different materials and tasks, from removing rough surfaces to achieving a finer finish.
The built-in dust collection system helps keep the workspace cleaner, while the included 10 sanding discs ranging from 40 to 180 grit cover different stages of sanding, making it a practical choice for both DIY projects and professional applications.
Understanding Sandpaper Grit and Its Uses
Sandpaper grit refers to the size and density of abrasive particles on the sanding surface. Different grit sizes are designed for different purposes, including removing material, smoothing surfaces, and creating a finished appearance.
The grit number determines how coarse or fine the sandpaper is:
Lower grit numbers remove material faster but leave deeper scratches.
Higher grit numbers remove less material but create a smoother surface.
Using the correct sandpaper grit with your orbital sander helps improve efficiency and prevents unnecessary surface damage.
40 Grit Sandpaper: Heavy Material Removal
40-grit sandpaper is a coarse sanding option designed for aggressive material removal. It is commonly used during the first stage of sanding when a surface needs significant correction.
Common applications include:
Removing thick paint, coatings, or old finishes
Smoothing rough or uneven wood
Removing deep scratches and surface imperfections
Shaping wood during early project stages
Because 40 grit creates visible sanding marks, it should usually be followed by finer grits to achieve a smoother finish.
60–80 Grit Sandpaper: Initial Sanding and Surface Preparation
60 and 80 grit sandpapers are commonly used for preparing surfaces before fine sanding. They provide effective material removal while offering more control than extremely coarse grits.
These grits are suitable for:
Sanding unfinished wood
Removing remaining paint or finish
Smoothing rough boards
Preparing surfaces for the next sanding stage
For many woodworking projects, 80 grit is a practical starting point when the surface is uneven but does not require heavy material removal.
120 Grit Sandpaper: Smoothing and Refining Surfaces
120-grit sandpaper is used for intermediate sanding after the rough surface has been leveled. It helps remove scratches left by coarse sanding and creates a more uniform texture.
Common uses include:
Smoothing wooden surfaces after initial sanding
Preparing wood before staining or painting
Refining furniture surfaces
Removing visible sanding marks
This grit provides a good balance between smoothing ability and material removal, making it one of the most commonly used sanding levels for woodworking.
180 Grit Sandpaper: Final Finishing
180-grit sandpaper is designed for the final sanding stage when surface appearance matters. It creates a smoother finish and prepares materials for coatings, stains, or polishing.
Use 180 grit for:
Final sanding before painting or staining
Smoothing surfaces between finish coats
Refining detailed woodworking projects
Creating a clean, professional finish
When used with an orbital sander at an appropriate speed, 180 grit can help achieve a smooth surface without excessive material removal.
Using the proper sandpaper grit allows you to control how much material is removed, how smooth the surface becomes, and how well the final finish turns out. With a Ecarke cordless orbital sander and the right grit combination, you can move through each stage of sanding with better control and achieve a finish that meets your project goals.
