The Makita GSB01Z 3 inch x 21 inch Belt Sander is a cordless belt sander built for fast material removal, surface prep, and flush sanding along walls and edges. This is a belt sander designed for aggressive sanding, leveling, and stock removal on wood and similar materials. Model Number: GSB01Z. If you want corded-style output without dragging a cord around the shop or jobsite, this is the kind of tool that makes sense.

Makita built this around a 3 inch x 21 inch belt with a variable speed range from 390 to 1,540 ft./min., which gives you real flexibility. Run it slower when you need more control on finish work or edge cleanup, then turn it up when the job is rough stock removal, old finish stripping, or flattening uneven surfaces. Makita also claims up to 20% faster sanding than its corded 9903, so this is not a cordless sander that feels like a compromise piece.

One of the smarter design points here is the adjustable large front grip. That matters because belt sanders can get clumsy near walls, corners, and transitions. On this one, the grip is set up so you can work with the nose and side of the sander for flush sanding. If you do remodeling, flooring, trim correction, or bench work where access matters, that feature is more than a bullet point. It changes how close you can work without switching tools.

The tool also uses an auto-tracking belt system, which means the belt tracks without adjustment. On the job, that saves time and frustration. Instead of stopping to babysit the belt, you stay focused on the workpiece. Makita also calls out an innovative design for improved tool and battery weight balance, which is important on a cordless belt sander because poor balance makes a heavy tool feel even heavier over a long sanding session.

For jobsite practicality, the GSB01Z includes an adjustable LED light and a dust bag. The light helps when you're sanding in shadow lines, against walls, or in less-than-ideal lighting. The dust bag will not replace a full extractor for high-volume sanding, but it does help keep the immediate work area cleaner. If you're already invested in Makita dust management, the tool is also AWS capable, which means it can communicate wirelessly with a compatible dust extractor when used with the separate Auto-start Wireless Transmitter.

This sander is part of the Makita 40V max XGT platform, so it is aimed squarely at users who already run XGT batteries and chargers or want into Makita's higher-demand cordless system. The brushless motor setup, XGT battery interface, and cordless format make it a better fit for users who need mobility and power instead of being tied to a bench or outlet. It is compatible with Makita 40V max XGT Lithium-Ion batteries only.

There is also a stationary-use angle here that is worth noting. With the separate Clamper Set, part number 192694-6, the sander can be used for more aggressive sanding, grinding, and shaping of various materials. That gives it more versatility in a shop setting, especially if you need to bring smaller workpieces to the tool instead of taking the tool to the material.

Who should buy it? This is a good fit for remodelers, carpenters, flooring installers, woodworkers, and serious DIY users who actually need a real belt sander, not just a finish sander. If your work involves flattening, stripping, edge correction, or fast material removal, the Makita GSB01Z 3 inch x 21 inch Belt Sander is a practical cordless option. If you only do light finish sanding, this is more tool than you need. But if you know why a belt sander earns its keep, this one brings useful access, speed control, and platform compatibility to the table.

Makita GSB01Z Belt Sander That Actually Earns Its Cordless Price Tag

The Makita GSB01Z 3 inch x 21 inch Belt Sander makes sense for users who want real belt-sander removal speed, better wall access, and the freedom of the XGT cordless platform.

• Who it's for: Remodelers, carpenters, flooring guys, and woodworkers who need a true stock-removal tool and already run, or plan to run, Makita XGT batteries.
• Why it stands out: The flush-sanding grip layout, auto-tracking belt system, variable speed control, and AWS capability give it more real-world usefulness than a basic cordless belt sander.
• Worth knowing: This is a bare tool, so battery and charger are not included, and you need the separate transmitter for AWS plus the separate clamper set if you want stationary use.

• Is this a cordless or corded belt sander? It is a cordless belt sander on the Makita 40V max XGT platform.
• Does the Makita GSB01Z support variable speed sanding? Yes. It has a variable speed dial with a belt speed range of 390 to 1,540 ft./min.
• Can it connect to dust extraction automatically? Yes, it is AWS capable, but the Auto-start Wireless Transmitter is sold separately.
• Will it sand flush to a wall? Yes. Makita specifically notes the adjustable front grip for sanding flush to the wall using the nose and side of the sander.