
Before you specify
Frequently Asked Questions
Is P-4 good enough for personal data?
For most organisations, yes. P-4 under ISO/IEC 21964 (DIN 66399) is the level normally cited for data whose disclosure would have a serious effect on an individual, and the C4's 3.5 x 30 mm particle is 105 mm², well inside the 160 mm² limit. Whether it is enough for you depends on your own policy or contract. If a specific document names P-5, the KOBRA 240.1 C2 is the machine that meets it; do not assume P-4 will be accepted as equivalent.
Can it really shred CDs and DVDs?
Yes. The C4 carries an O-3 optical media rating, unlike the C2 on the same chassis. Feed discs one at a time through the throat rather than mixing them into a stack of paper, and expect the machine to be noticeably louder for those few seconds. It will not take hard drives, SSDs or USB sticks — those need a dedicated media destroyer.
How often do I have to add oil?
The oiling itself is automatic; your job is to keep the reservoir filled at the interval given in the manual. Use genuine shredder oil. The reason this matters is that an unlubricated cross-cut head loses sheet capacity first and then starts jamming, and by the time users complain the cutters have usually already suffered. The automatic system exists precisely because manual oiling gets forgotten.
Can I leave staples and paper clips in?
Yes. KOBRA specifies carbon hardened cutting knives unaffected by staples and clips on the 240.1 chassis, so everyday stapled documents can go straight in. Remove binder clips, bulldog clips and ring binder mechanisms — those are hardened steel and will chip a cutting tooth. Also avoid laminated sheets, which wrap around the shafts.
How many people can share it?
Seventeen sheets a pass, a 10.5 gallon bin and a 24 hour continuous duty motor make this comfortable for a department of roughly ten to twenty-five people doing ordinary daily shredding. It is not a central machine for a whole building, and it is not intended for bulk archive destruction — for that you want a machine with a much larger bin and a wider throat.
Why is it slower than the strip-cut models?
Because it does more work per sheet. KOBRA rates the C4 at 17 ft/min against 22 ft/min for the strip-cut 240.1 S4 and S5, and 17 sheets per pass against 26 and 31. Cutting a sheet into 3.5 x 30 mm particles takes substantially more energy than cutting it into strips, and that shows up in both feed speed and capacity, plus the higher 58 to 61 dB(A) noise level.
Will legal-size paper fit?
Yes. The 9.5 inch throat takes US letter and legal without folding. Tabloid at 11 x 17 inch will not fit and must be folded first, which counts as two sheets against the 17-sheet rating.