Sanding with a circular sander, often referred to as an orbital sander (random orbital or standard), is straightforward but requires the right technique for optimal results.
Getting Started: Preparation and Setup
Before you begin, ensure your sander's sanding pad is securely attached and the appropriate sandpaper grit is selected for the task. A coarser grit (lower number, e.g., 80) is used for initial sanding to remove significant imperfections, while finer grits (higher number, e.g., 220) are used for smoothing and finishing. Always empty the dust bag before switching wood types (as per a YouTube video on random orbital sander tips). Source: 20 Random Orbital Sander TIPS for Beginners - YouTube
Sanding Technique
- Consistent Light Pressure: Apply consistent, light pressure; avoid pushing down hard. The weight of the sander and your arm usually provides enough pressure. Source: How to Use an Orbital Sander : 4 Steps - Instructables
- Direction of the Grain (Wood): On wood, sand with the grain to minimize scratches and achieve a uniform finish. Move the sander steadily over the surface, avoiding rapid back-and-forth movements. [Source: Remember to apply consistent, light pressure while sanding and avoid pushing down too hard. On wood, move the sander in the direction of the grain. This reduces the appearance of scratches and helps achieve a uniform finish. Move it steadily over the surface, avoiding rapid back-and-forth movements.]
- Avoiding Tilting: Keep the sander flat; avoid tilting it, maintaining at least 3/4 of the sanding pad in contact with the surface at all times. Source: How to Use an Orbital Sander : 4 Steps - Instructables
- Overlapping Passes: Overlap your sanding passes to ensure even sanding across the entire surface.
Sanding Different Materials
While the basic technique remains consistent, the choice of grit and the approach may vary depending on the material being sanded. For example, sanding paint requires a different approach and grit selection compared to sanding wood. Source: How to Use an Orbital Sander for Beginners - YouTube
Orbital Sander vs. Random Orbital Sander
Note that while the term "circular sander" is sometimes used broadly, it's important to distinguish between standard orbital sanders and random orbital sanders. Random orbital sanders produce a more random pattern, making "sanding with the grain" less relevant in the same manner as with a standard orbital sander. Source: Question: How does one "sand with the grain" when using an orbital ...
Common Mistakes to Avoid
- Over-sanding: Sanding too aggressively can damage the surface.
- Improper Pressure: Applying excessive pressure can lead to uneven sanding and gouges.
- Poor Velcro Attachment: Ensure the sandpaper is securely attached to the sander’s pad to prevent it from detaching during use. Source: Don't make these 5 mistakes with a random orbit sander. - YouTube
