The Makita 9403 4" x 24" Belt Sander is a corded belt sander built for fast material removal on large wood surfaces. This is a belt sander designed for aggressive sanding, leveling, and surface prep. Model Number: 9403. With an 11 amp motor, a 4 inch by 24 inch belt, and belt speed up to 1,640 ft./min., it is aimed at users who need production-level sanding instead of light finish work.

What makes this model matter is how it balances speed with control. The wide belt helps cover more surface area per pass, which is useful for flattening tabletops, cleaning up glued panels, knocking down high spots in subfloor, or removing old finish from decking and flooring. Makita also states the electronic speed control helps maintain constant speed under load, so the tool keeps cutting instead of bogging down when you lean into tougher material.

The design is built around real jobsite use. A large front grip gives you a solid hand position when you need to guide the tool across long runs, and the power cord is routed on the upper portion of the handle to keep it out of the way. At 12.6 lbs., this is not a trim sander, and that is the point. The weight helps the sander stay planted so the belt can do the work, especially on broad, flat stock where consistent contact matters.

One of the smarter features on the Makita 9403 4" x 24" Belt Sander is its flush sanding capability. The nose and side of the tool are designed so you can work up close to walls and edges. If you install floors, build decks, or fit panels in tight spaces, that saves hand sanding and cleanup work at the end of the job.

Dust and debris are a fact of life with any heavy sanding setup, so Makita uses labyrinth construction to help seal and protect the motor and bearings. That matters because belt sanders move a lot of abrasive dust in a hurry. The included dust bag also swivels 360 degrees, which gives you more freedom to work from different positions without constantly fighting the bag or hose direction.

Another standout is the noise level. Makita rates this model at 84 dB, making it one of the quieter sanders in its class based on the provided product data. That does not make it quiet in an absolute sense, but on long jobs it can be a noticeable difference in operator comfort compared to louder production sanders.

This corded belt sander is best suited for woodworkers, carpenters, furniture makers, floor installers, deck builders, and general contractors who need quick stock removal on larger surfaces. If your work is mostly detail sanding, edge blending, or finish-ready surface prep, this tool is probably more machine than you need. If your priority is flattening, stripping, and getting through material fast, this is the kind of sander you buy once and keep around for the heavy stuff.

Makita 9403 4" x 24" Belt Sander for serious stock removal

This is the kind of belt sander you buy when you need to move material quickly, keep the tool planted, and work right up to edges without babying the machine.

• Who it's for: Pros and serious DIY users doing flooring, decking, furniture work, and other jobs where a compact finish sander just is not enough.
• Why it stands out: The wide 4 in. belt, 11 amp motor, flush-to-wall design, and quieter 84 dB operation make it a strong choice for high-production sanding.
• Worth knowing: At 12.6 lbs., this is built more for steady, aggressive sanding on larger surfaces than for delicate one-handed touch-up work.

• Is this a variable speed belt sander? No. The product data lists no variable speed dial on the Makita 9403.
• Can it sand close to a wall? Yes. Makita states the nose and side of the sander are designed for sanding flush to a wall.
• Does it include dust collection? Yes. It comes with a dust bag, and the dust bag swivels 360 degrees for easier operation.
• What kind of power does it use? This is a corded 115V belt sander with an 11 amp motor.