DELTA 31-120 12-Inch 1/2-Horsepower Benchtop Disc Sander, 120-Volt 1-Phase Review

I found this sander to be a great alternative to a disk/belt unit.The price point is great for the level of features.I do not have room for a disk/belt unit that would give me as large a disk.I rarely use the belt anyway.
A miter guide track that accepts a full size miter bar is very useful.At 12" you get a legitimate 5.75" of effective sanding.You can get a precise level and square on the table, though it is not an easy adjustment.The table adjustments are hampered by the quailty of the castings and fittings. The unit is quite heavy (no aluminum!) and runs very stable on a bench. The flywheel effect helps it maintain power, though the 1/2 motor could be bigger. I would not pay the premium to get the 31-125.I looked at the 31-125 and with this unit I was getting most of the features at a great price.
I've used it on maple and cherry and have been able to do both guided and freehand sanding and shaping without burning.I've fed a 4" section of 5/4 cherry for an endgrain polish and was very pleased with the results.
Delta quality has been lacking over the last few years, this unit is no exception. Castings are not at all well finished. Even the quality of the nobs and bolts are below every competitor, even Rigid. I'm not sure how long Delta can survive on engineering good features, but producing mediocre quality.I will probably disasemble and rebuild this sander, tuning the castings, replacing the low quality fasteners and end up with a much better machine.

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Product Description:
The DELTA 31-120 12-Inch 1/2 HP Benchtop Disc Sander is designed with a smooth-but-powerful 1/2 HP, 120-volt motor spins the sanding disc up to 2,500 RPM to suit the needs of the professional craftsman. The heavy-duty disc sander includes a steel disc plate that holds a 12-inch diameter, 80-grit abrasive disc. The sander's cast-iron base construction reduces vibration and includes base holes for bench mounting. The cast-iron table comes with table-locking handles and tilts to positive 45 and 90 degrees, while a 3/8-inch-by-3/4-inch miter gauge slot is built into the table for angled and straight edge sanding jobs. A top manual brake puts a stop to sanding in mere seconds. The integral dust collection fan carries debris away from the table, and the built-in dust hose with 2-1/4-inch OD connectors attaches to most standard shop vacuums.

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