EN ISO 5395-2, and what three seconds buys you

What the standard pins down

EN ISO 5395-2 covers the lawnmower a person walks behind: pushed or self-propelled, petrol, mains or battery, rotary or cylinder. It is the second part of a family whose first part sets out the vocabulary and the tests common to all powered lawnmowers, and whose third part handles the ride-on machines this site does not compare.

What it pins down is the machine as a hazard. Where a hand or a foot can reach, and what must stand between them and the blade. The operator-presence control — the bail you hold against the handlebar — and what has to happen when you let go. How fast the blade must come to rest once it does. How the grass discharge is shielded, and what the chute must do when the catcher is removed. How the handle is arranged so that the machine cannot be pulled onto the person pulling it. What the instruction book must contain, and which warnings must be moulded or printed onto the machine itself.

It also fixes how those things are verified. A standard that merely asserted “the blade shall stop quickly” would be worthless; the value is in specifying the rig, the run-up, the measurement and the pass mark, so that a machine tested in one country means the same as a machine tested in another.

What it does not promise

It does not promise a cut. Nothing in it records how evenly a deck clears grass, whether the machine drops a windrow at the edge of each pass, how it behaves in the wet, or whether the catcher actually fills before it starts spilling. Those are the things a lawn shows you and the standard does not.

It does not promise durability. The tests are conducted on a machine that has been run in, not on a machine in its fifth season. Whether a plastic deck still holds its shape, whether the self-propel drive belt still bites, whether the height lever still clicks into the same detent — none of that is what was measured.

It does not promise a cutting width or a cutting height. Those are dimensions the manufacturer chooses and prints, and this site treats them as dimensions rather than as performance. A 46 cm deck does not cut a 46 cm swath in the sense a buyer means; it describes the housing.

And it says nothing about the area a machine suits. That figure — the square metres in almost every listing on this shelf — has no publisher at all, and it has its own page here.

The documents it sits next to

A mains-powered mower is also built against the household-appliance safety standard for walk-behind electric mowers, which covers the electrical side this document does not. A battery machine brings its own set for the pack, the charger and the ingress rating of both.

Every powered mower sold in the European Union also carries a guaranteed sound power level, and that figure comes from the outdoor noise directive rather than from here. A petrol machine adds the emission stage of its engine, which is a third document again.

None of these overlaps. Each measures a different thing about the same machine, and a listing that quotes one is not quoting the others.

Which shelves it reaches here

Every mower family here cites it — petrol, battery, mains and the hand cylinder machines, which fall under it too despite having no engine at all. So do the blade and catcher shelves, because a replacement part fitted to a machine is part of the guarded assembly the standard assumed.

Where a mower listing quotes a noise figure or a power rating without naming any standard, the review page says so plainly. On this shelf that is common, and it is a finding rather than an omission on our side.