Symptoms
- Visible gap between blade teeth when closed
- Branches slip through without being cut
- Uneven cutting along the blade length
- Blades feel loose when wiggled by hand while off
Likely causes
- CommonLoose blade mounting boltsVibration during use can gradually loosen the bolts holding the blades together.
- CommonImpact damage bending one blade slightlyHitting a hard object like a fence wire can knock a blade out of true alignment.
- PossibleWorn blade guide or spacerSmall spacers that keep blade spacing correct can wear down over time.
- Less commonBent gearbox drive armInternal damage to the mechanism driving the blades can throw off their relative position.
What to do
- Unplug or remove the battery before handling the blades.
- Inspect the full blade length for visible gaps or a bent section compared to the rest of the blade.
- Check and tighten all blade mounting bolts evenly, following a cross pattern if there are multiple bolts.
- Look for worn spacers or guides between the blades and replace if they show significant wear.
- Test blade movement by hand (with power disconnected) to confirm both blades move smoothly together without binding or gapping.
- If a single blade appears bent, this usually requires replacement rather than attempting to straighten it.
- Test on a small branch after adjustment to confirm clean, gap-free cutting along the full blade length.
Tools and parts
- Wrench or screwdriver set
Hedge trimmer blade setSearch: “hedge trimmer replacement blades”
Blade spacersSearch: “hedge trimmer blade spacer kit”
When to call a pro
If a blade is visibly bent or the gearbox drive arm is damaged, have a small-engine or outdoor equipment shop replace the affected parts.
Safety
Use caution
Always disconnect power before touching or adjusting the blades.