Before you specify
Frequently Asked Questions
Can it shred CDs or DVDs?
No. This is the important limitation on the 51322. Dahle lists paper, staples, paper clips and credit cards for this model and publishes no optical-media rating for it, unlike the P-4 CleanTEC 51314 and 51414 which are both rated O-3. If discs are part of what you destroy, choose one of those instead, or plan a separate route for optical media.
How much finer is P-5 than P-4 in practice?
Substantially. DIN 66399 allows up to 160 mm² per particle at P-4 and up to 30 mm² at P-5 - roughly a five-fold reduction. Dahle's P-4 machines cut about 1/8" x 1 9/16"; the 51322 cuts about 1/13" x 9/16", or roughly 1.9 x 14 mm. Whether that difference is required is a policy question, not a technical one, and most commercial destruction standards stop at P-4.
Does the automatic oiler mean I never touch it?
It means you never have to run oiling sheets or squeeze oil into the throat. You do have to keep it topped up with Dahle shredder oil, which is an ongoing consumable. Use Dahle's own oil - aerosols and general-purpose lubricants can leave a residue that binds paper dust to the cylinders, which is the opposite of what you want on a fine cut.
Why is it labelled cross-cut when P-5 is usually called micro-cut?
Manufacturers use the marketing terms loosely; DIN 66399 does not define them at all. Dahle calls the 51322 a cross-cut machine. By particle area - about 27 mm², under the 30 mm² P-5 limit - it sits in what the industry generally calls micro-cut. The DIN level is the specification that matters and it is P-5 either way.
Is twelve sheets going to be frustrating?
It depends on your volume. Dahle publishes 12 sheets on 20 lb bond and 14 on lighter stock, at 18 ft/min. For a small office destroying a folder or two a day, it is unnoticeable. For anyone clearing archives, the drop from the 16 sheets of the P-4 51314 in the identical cabinet becomes obvious quickly. Size the machine on your realistic daily volume, not on the worst week of the year.
How long does a 23-gallon bin last on a P-5 cut?
Longer than the same bin on a coarser machine. P-5 particles trap less air and pack more densely, so a given bin volume holds more paper by weight. Dahle publishes volume rather than a sheet count. Bags are Dahle #20725, covering 20-30 gallon bins, sold 100 per box and not included with the machine.
Does the dust filter need replacing?
Yes, it is a consumable. Dahle does not publish a replacement interval for the 51322 - it depends on throughput. Inspect it when you change the bag and replace it when it is visibly loaded. Running a fine-cut machine with a clogged filter puts the dust back into the room, which defeats the point of buying a CleanTEC model.