VEVOR 5" Disc Sander & 1" x 30" Belt Sander Combo | 2.5A Induction Motor | Adjustable 0-45° Cast Aluminum Work Table | Powerful Woodworking Bench Sander for Sanding, Polishing & Shaping Wood, Metal & Plastic | DIY Projects & Professional Workshops

When everything is working it is a great product (I did not compare it to $500+ models).I found out that there are 2 main models (by all vendors) the one from Rayobi, Harbor Fright, skill, etc. and the second type by Vevor, backtool, ricon, porter cable. the first type are driven by belt and use 6" disk, the second type use direct drive, and 8" disk. The belt tension arm look very similar between the two types,All made in china.Reading many reviews I ruled out type 1, that use belt for the motor to spin the disk and sanding belt. Adding another part that will go bad after reasonable use. and also loss of power between the motor and the grinding wheels.I ordered the Vevor BD4083 for $169, as similar units were $210, $279 and $249.The BD4083 came with disk plate that was not flat, and about 2mm higher on one side.While waiting for the company to send another disk, I got the porter cable from Lowe's (that comes with 3 years warranty).Open the box of Porter cable unit, the disk was bent about 5mm on one side, completely unusable. I took it back.I did get the 8" disk plate from Vevor, and it is flat, and both the disk and the belt works great. I used it with hard wood, 80 grid belt, and 120grit on the disk, it works better than expected.Both trays are stable, and do not move or change angle.the differences in type #2 brands brands is the price, some use aluminum sanding belt drive, other use made of plastic (Vevor use plastic, Porter cabe Aluminum), the vacuum attach ports is different between the brands , and base made of metal or cast iron, (Vevor use metal base).On the Vevor, you can pull out the sanding belt easy, no disconnecting parts/tray to pull out. on the porter cable, you need to use a screw driver to pull the cover to remove the belt.On the bucktool and Ricon 50-114 you have to remove the tray.The dust collection port is different between the brands, but when grinding dust covers everything anyhow.the belt 4x36 and the 8" disk that come with the unit are high quality.I did get fast response from Vevor reps, almost daily e-mail.I do recommend the BD4083The Vevor BD4083 is powerful machine, good value for you money, direct drive (no driving belt).I wish that the trays would be similar to the Porter cable, or use standard miter channel.