The Best 3×21 Belt Sander Paper for 2019 – Put to the Test

Sanders come in all shapes and sizes, from belt sanders and palm sanders to random orbital sanders like the Makita bo5030, with belt sanders being used for the widest range of applications. Looking for the perfect 3×21 belt sander paper for your project? In this article, we will go over belt sander papers that will make your job go smoothly.

a detail sander and a jig-saw among several peices of wood

Learn a Bit About the Grit – Sand Paper Grit Numbers

Before we jump into the different brands you need to familiarize yourself with how the grit numbers work. The grit numbers for sanding products are a reference to the size of the abrasive particles that give the sandpaper roughness. The lower the number gets, the larger the particles are. Heavy-grit sandpaper will remove lots of material quickly but also greatly scratch the surface. Lighter grit sandpaper removes less material but leaves a much more polished surface. Below is a general guide on grit levels.

36 Grit to 100 Grit – Removing material and work with power sanders. Generally used for:

100 Grit to 180 Grit – Works decent with both hand sanding and power sanding, and even work with the electric sander for walls. Generally used for preparation like:

180 Grit to 320 Grit – Works best hand sanding before applying a finish. Hand sanding is generally used for:

finishing wooden surface by hand-held belt sander

At the end of the day it’s important to remember that throughout the course of a typical woodworking project, you will end up working with sandpaper of varying grit because they all serve a different purpose. In the case of belt sander paper, the brand name doesn’t matter much – you just need to pay attention to utilizes the proper grit.

Buying Sanding Belts on Amazon

Amazon has a huge selection of pretty much any grit you could ever need for your belt sander. Below are the common listings you’ll find if you do a search for 3×21 belt sander paper:

Reusing your old sandpaper

As well as buying your sandpaper from places such as Amazon, you can also reuse your old sandpaper. It is possible to repair, clean, and then reuse orbital sandpaper. This can then be repurposed for either hand sanding blocks or even for belt sanders after some small modifications.

Purchasing an All-in-One Kit

With smaller sanders, it’s common to see a complete kit for sale like the Makita bo5041k 5-inch random orbit sander kit. Sanding belts are much larger than orbital sanding pads so it’s not surprising to see them being sold separately.

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