
Before you specify
Frequently Asked Questions
Can it shred CDs or DVDs?
No. Dahle lists staples, paper clips and credit cards for the SM 90, but not optical media. The SM 300 in the same family is rated for CDs and DVDs. Forcing a disc through a machine not rated for it risks the cutting cylinder, and the five-year cylinder warranty is unlikely to cover damage from unlisted material. For a handful of discs, a dedicated optical shredder or a disposal service is the better answer.
How long does a full 90-sheet tray take?
Dahle rates the SM 90 at 6 ft/min, roughly 11 sheets per minute, so a full tray runs for around eight minutes. It is slow by design - a compact, oil-free machine at this price is not built for continuous duty. If eight minutes of shredder noise beside your desk is unwelcome, load the tray at the end of the day and let it run while you leave.
Does the auto-feed tray lock?
Dahle publishes a lockable feed compartment for the SM 300 but does not list a lock for the SM 90, so treat the tray as open. In a private office that is rarely an issue. In a shared space where loaded documents would sit unattended in view of others, the SM 300 and its locking hopper is the model that addresses it.
Is it really oil-free, or does it just come with oil sheets?
Genuinely oil-free. The cutting cylinders are designed to run without lubricant, so there is nothing to buy and nothing to remember. Dahle backs the cylinders for five years against one year on the machine itself, which is a reasonable signal of confidence in the design. It also means no oil residue on the shredded output.
Will 7 gallons last a week?
For one person, usually yes. Roughly one to two full 90-sheet tray loads will noticeably fill the bin, and most single users do not generate that daily. If you find yourself emptying it more than twice a week, you have outgrown the SM 90 and the SM 300 with its 11-gallon bin is the sensible step up rather than a second small machine.
How loud is it next to a desk?
Dahle's brochure lists 60 dB and its online spec page lists 62 dB; both figures are around ordinary conversation level. In a quiet single office it is noticeable while running but not disruptive, and at 6 ft/min it is running for short stretches rather than continuously. It is meaningfully quieter than any of the industrial PowerTEC machines.