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Safety

Brush cutter safety tips

A brush cutter throws debris and spins a blade at high speed — respect it and it's perfectly safe. Here are the essential rules for using one without incident.

By · Updated · first published

In short:Brush cutter safety starts with protective gear: EN 166 eye protection or a mesh visor, ear defenders for petrol machines, gloves, sturdy boots and long trousers — cut-resistant for blade work. Keep people and pets at least 15 metres away, as thrown stones travel far. Avoid blade kickback by cutting with the correct part of the blade, keeping revs up and never cutting above waist height. Cut across slopes, stop the machine before clearing the head, and never refuel a hot engine.

Wear the right protection

Personal protective equipment is non-negotiable. Before you start:

  • Eyes: certified safety glasses (EN 166) or a face shield.
  • Ears: defenders (SNR 27 dB+) for petrol machines.
  • Hands & body: gloves, sturdy boots and long trousers — cut-resistant for blade work.

See our safety gear guide for our picks.

Keep people and pets clear

Keep everyone at least 15 metres away. Thrown stones and debris travel far and fast — the most common brush cutter injuries are to bystanders, not the operator.

Avoid blade kickback

Kickback is the biggest blade hazard — a spinning blade hitting something solid can throw the machine sideways. To avoid it:

  • Cut with the correct part of the blade (typically the left/front segment).
  • Keep the engine revs up — a slow blade grabs.
  • Never cut above waist height, and keep a firm two-handed grip.
  • Watch for hidden stones, wire and roots.

Work safely on slopes and around obstacles

  • On slopes, cut across the incline, keep firm footing, and never overreach. See our slope guide.
  • Use a harness for blade work and longer sessions.
  • Stop the machine before crossing paths, refuelling or clearing the head.
  • Never refuel a hot engine or work in wet conditions with a corded electric machine.
Before every use: check the guard is fitted, the head/blade is secure and undamaged, and the area is clear of people, pets and hidden debris.

Noise and vibration

Petrol brush cutters are loud: Honda declares 110 dB(A) sound power for the UMK 425 and Husqvarna guarantees 115 dB(A) for the 129R. Wear ear defenders whenever the engine runs — see noise levels and hearing protection. Long exposure to vibration can damage hands and arms; choose a low-vibration machine for long sessions, take breaks and keep your hands warm. More in vibration and HAVS.

Fuel and batteries

  • Refuel outdoors on bare ground, with the engine off and cool, at least 3 metres from where you'll start it.
  • Wipe up spills and never smoke near fuel. Store fuel in a labelled can made for petrol.
  • Charge batteries with the maker's charger in a dry place, and remove the battery before clearing the head or changing line.

Know when to stop

Stop work in rain on a corded machine, on slippery slopes, when tired, or when someone comes within 15 metres. Stop the engine before walking between areas. If the machine vibrates unusually or the blade is damaged, stop and inspect it before carrying on.

Frequently asked questions

What protective equipment do I need for a brush cutter?

As a minimum: certified eye protection, ear defenders, gloves, sturdy boots and long trousers — ideally cut-resistant for blade work. A face shield and helmet are recommended for heavy clearing.

How far should people stand from a brush cutter?

Keep bystanders, children and pets at least 15 metres away. A spinning line or blade throws stones and debris a surprising distance at high speed.

What is blade kickback and how do I avoid it?

Kickback is when a spinning blade hits a solid object and throws the machine sideways. Avoid it by cutting with the correct part of the blade, keeping revs up, not cutting above waist height, and maintaining a firm two-handed grip.