Electric hedge trimmer: blade, spacing between teeth, and type of hedge.
1) What does "distance between teeth" mean (and why does it matter more than watts)?
The distance between the teeth (mm) indicates the ability to "swallow" thicker branches. In common patterns, one sees:
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15 mm (light maintenance)
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26 mm (intermediate)
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30–34 mm (more robust)
Bosch specifically lists models with blade spacing of 26 mm and 34 mm , as well as battery-powered versions with 30 mm .
And in one specific model, Bosch claims that a tooth spacing of 34 mm allows for cutting branches up to 34 mm in diameter (in the context of that product).
Simple rule
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"Thin" hedges and frequent maintenance → fewer mm
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Dense hedges and thicker branches → more mm (without adding excessive weight)
2) Blade length (cm): speed vs. maneuverability
Bosch shows typical blade lengths of 50 cm , 65 cm , and 70 cm in corded models.
How to choose
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45–55 cm : small gardens, shrubs, tight areas
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60–70 cm : long, straight hedges (faster per pass)
3) Single-edged vs. double-edged (two blades): which is better?
Husqvarna explains that, for straight sections, a single-sided hedge trimmer can use a longer blade without becoming too heavy, and can cut larger areas in a single pass.
For versatility (top + sides + cutouts), many users prefer a double-edged blade.
4) Cutting technique: how to avoid "holes" and waves
STIHL has a hedge trimming guide with techniques for the top and sides (including angles and sequence).
Practical tips
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First, do the sides , then the top.
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For a flat top: use a visual "line" (cord).
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Do not force thick branches beyond what the hedge trimmer can handle.
5) Purchase checklist (electric hedge trimmer)
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Proper tooth spacing (15–34 mm, depending on the hedge)
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Blade of the right size (50–70 cm as common references)
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Single-sided (straight/productivity) or double-edged (versatility)
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Comfortable weight for the user.
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Tall hedges: consider a tall/telescopic solution (safer)
FAQ
What is the purpose of 34 mm teeth?
In certain models, 34 mm is indicated for branches up to 34 mm (in the context of the product).
Which blade should I choose for a large hedge?
65–70 cm speeds up work on long hedges, but requires more control and can be heavier.