Delta 31-481 2 HP Industrial 26 in. Drum Sander

Delta Model: dwwn31-481
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Prop 65 Warning
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WARNING: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to
Delta 31-481 2 HP Industrial 26 in. Drum Sander Delta Model: dwwn31-481

Product Features & specs :

Delta 31-481 2 HP Industrial 26 in. Drum Sander

The 31-481 26 in. dual drum sander is designed with a heavy duty steel Frame and superior finish for long lasting durability. The strong 3 HP main motor will help you get the job done with ease. The independent adjustable rear drum offers one pass sanding capability using 2 grits, reducing processing time. Tool-less drum wrap tensioning clamps make installation and removal of sanding strips easy, requiring less downtime.
  • Industrial 3 HP, 230V, 60 Hz, 1-Phase Main Motor with magnetic controls
  • 1/6 HP, 1 Phase, variable speed feed belt motor with feed speeds from 3 FPM to 20 FPM; drum speed 1,550 RPM
  • Increased capacity allows for sanding material up to 12-1/4 in. deep x 25-1/2 in. wide
  • Independent adjustable rear drum offers one pass sanding capability using 2 grits, reducing processing time
  • Rear roller adjustment dials ensure rear drum is level
  • Latching top door provides direct access to dual drums for ease in sanding wrap changes
  • Toolless drum wrap tensioning clamps make installation and removal of sanding strips easy, requiring less downtime
  • (2) 4 in. Dust ports for efficient dust collection requiring a total of only 600 CFM Includes (2) 4 in. integral dust ports, feed belt, (2) sanding drums, (1) 80 grit and (1) 120 grit sanding strips
What’s Included:
  • 2 HP Industrial 26 in. Drum Sander - 31-481
Power Source
Board Width (Min.)
25.5 in
Board Thickness (Max.)
5 in
PreWired Voltage
UL Safety
Drum Speed (RPM)
Board Thickness (Min.)
1/4 in
CSA Safety
Wifi compatibility
Conveyor Speed (FPM)
3 - 20
Dust Port Size
4 in
Bearing Diameter
OD - 28 mm
Conveyor Motor
1/6 HP
Bluetooth Compatibility
Motor Phase
Motor Type
Drum Diameter
5 in
Board Length (Min.)
12-1/4 in
Drum Length
26 in
ETL Safety
31 in.
46 in.
53 in.
485 lbs.
Warranty Term
5 Year

Reviews :

3.0 / 5.0
2 Reviews
5 Stars
4 Stars
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1 Star
Would you recommend this product?
Yes (1)
No (1)
Would you recommend this product?
Did we make the right purchase decision?
Our woodworking club recently purchased this machine and placed it into service. It replaced a drum sander of another brand. Soon after, we found the front drum was not parallel to the feed table. We had to place shims under the left side of the feed table mounts that were almost 1 mm thick to get it parallel to the front drum.
The instructions on Pages 12 and 13 in the Operating Instructions for setting rear drum height and parallelism are confusing. In general, it is a very poor manual. Most manuals for drum sanders include information about dimensions of sanding strips. This one does not. The manual is titled Operating Instructions and Parts Manual. There is no "Parts Manual".
We purchased the Delta brand set of three sanding strips that are advertised to fit this machine. They are too short. The Delta's specs for this machine say the strips are 92 1/2" long, and that is the length of the strips that come in the set. However, when you try to install one of these strips, they are obviously too short. The strips that came installed on the machine are 93 1/2". That one inch makes a big difference.
Even though we have a robust dust collection system, lots of dust escapes and is dumped on the floor below the outfeed side of the feed table.
Maybe after we learn some things about this machine that the Operating Instruction should have made clear, and we receive the bulk abrasive belt material we have on order and can cut strips to the correct length, we will learn to love this machine. We will see.
February 19, 2016
Would you recommend this product?
Great sander for any shop
Great for large glue-ups and small ones. Just love the finish and time savings. Works great on quartersawn Oak, NO tearout and NO snipe. Fantastic feed rate adjustment, and heavy duty belt. Sized just right, not too big or too small. In my little shop, it's hard to justify having a dedicated sander and giving up the floor space but it's well worth it when I consider the time savings and consistent finish. It would be nice if it were more mobile
July 13, 2012

Q & A :

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Browse 3 questions Browse 3 questions and 4 answers
Using 220 volts what is the amperage?
Studio on Dec 10, 2015
BEST ANSWER: A 3 HP 240V motor draws 17 amps and the feed motor would be about 2 amps
what size is it , does it sit on the floor
slick on Sep 4, 2015
BEST ANSWER: The Delta 31-481 dimension in inches are 51.87 in height, 32.68 in width, and 48.3 in depth. This unit is a floor mount unit.
Can i sand 5 piece doors With delta dualhead 31-481 sander
small cabinet shop on Sep 24, 2014
BEST ANSWER: Yes, so long as the material is no thicker than 5" and 26" wide.


Warranty for all Delta Machinery Products - Five Year Limited New Product Warranty (180 days for reconditioned products)

DELTA will repair or replace, at it’s expense, and it’s option, any new DELTA machine, machine part, or machine accessory which in normal use has proven to be defective in workmanship or material, provided that the customer returns the product prepaid to a DELTA factory service center or authorized service station with proof of purchase of the product within 5 years and provides DELTA with reasonable opportunity to verify the alleged defect by inspection. For all refurbished DELTA product, the warranty period is 180 days. DELTA will not be responsible for any asserted defect which has resulted from normal wear, misuse, abuse or repair or alteration made, or specifically authorized by anyone other than an authorized DELTA service facility or representative. Under no circumstances will DELTA be liable for incidental or consequential damages resulting from defective products. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty is DELTA’s sole warranty and sets forth the customer’s exclusive remedy, with respect to defective products; all other warranties, express or implied, whether of merchantability, fitness for purpose, or otherwise, are expressly disclaimed by DELTA.