Month: February 2026

Have you ever pulled parts off your CNC router and had the thought “I wish I could sand these before I pull them off the table”? Well, now it’s an option. The CNC Orbital Sanding Attachment fits up into a standard collet and can be used to sand the top surface of your material.

Sizes

The CNC routing sander attachments come in 3 sizes: 4″, 5″, and 6″ and have a velcro face to attached sanding paper. Each unit will come with (10) 80 grit and (10) 120 grit discs. Other grit discs are available.

Part Number	Size
61299	4″
61335	5″
61336	6″

Spindle Safety

These sanding attachments are dynamically balanced and non-random to ensure smooth operation and reduce vibration during use. They are rated for up to 8,000 RPM. It operates in a fixed, predictable motion and should not be used to flatten uneven surfaces, the surface must already be flat before sanding.

What makes these safe in a CNC router’s spindle is the bearing mechanism that is built into the shaft. It has bearings, a spring, and a locking pin that make this all possible.

When to use?

These sanders are not made to flatten an uneven surface, they are made to sand even surfaces. Included in each kit are two springs. The harder spring is for completely flat surfaces whereas the soft spring is used for rougher but still even surfaces.

This is a great tool to have in the wood industry. It eliminates much of the manual sanding to remove tool marks, saving time while improving surface prep.

SANDPAPER GRITS

Knowing which grit sandpaper to use depends on the type of job and what step in the process you are in. The lower the grit numbers, the coarser the disc will be, and the higher the grit, the finer it will be.

• 80 grit: Coarse, Heavy material removal. Used for stripping paint, smoothing rough wood. Great for initial sanding of very rough surfaces. Applications: Wood Slabs, Wood, Metal, Fiberglass, Paint, Varnish, Primer, Plastic & Rubber.
  
• 120 grit: Medium, Smooths surfaces after 80 grit. Good for prepping wood before finer sanding. Often used before priming or staining. Applications: Wood Slabs, Wood, Metal, Fiberglass, Paint, Varnish, Primer, Plastic & Rubber.
  
• 150 grit: Medium Fine, Refines the surface after 120 grit. Used for light smoothing and general sanding before finishing. Applications: Wood Slabs, Wood, Metal, Fiberglass, Paint, Varnish, Primer, Plastic & Rubber.
  
• 180 grit: Fine. Prepares wood for final finishing. Removes small scratches left by 150 grit. Good for sanding before applying stain or primer. Applications: Wood Slabs, Wood, Metal, Fiberglass, Paint, Varnish, Primer, Plastic, Rubber & Solid Surface.
  
• 220 grit: Extra Fine. Final sanding before finishing. Also used between coats of finish like polyurethane or paint for a smooth, professional result. Applications: Wood Slabs, Wood, Metal, Fiberglass, Paint, Varnish, Primer, Plastic, Rubber & Solid Surface.

Hopefully this not only answered your questions about sanding with your CNC router but also got you excited to try one. Feel free to reach out anytime for advice or recommendations. I have personally used this in our shop and have been quite impressed by the results.