If your Sun Joe cordless hedge trimmer begins snagging on branches or its cutting performance starts to decline, the blades may need to be sharpened.
Sharpening instructions can vary slightly by model, so always check the operator's manual for your complete hedge trimmer model number before performing maintenance.
When Should I Sharpen the Blades?
The cordless hedge trimmer manuals recommend sharpening when cutting performance or cutting behavior begins to deteriorate.
One example given in the manuals is when the blades begin to frequently snag on branches.
Do not operate the hedge trimmer with dull or damaged cutting blades. The manuals warn that this can overload the trimmer and produce unsatisfactory cutting results.
Before You Begin
Stop the motor and remove the battery before handling or sharpening the blades.
If your model uses two batteries, remove both batteries.
You will need a smooth round file and a vise for the sharpening procedure described in the applicable cordless hedge trimmer manuals.
How Do I Sharpen the Blades?
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Stop the Trimmer + Remove the Battery
Stop the motor and remove the battery or batteries from the hedge trimmer before beginning the sharpening procedure.
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Secure the Blade
Clamp the blade securely in a vise.
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File the Exposed Cutting Surfaces
Use a smooth round file to file the exposed cutting surface of each blade tooth.
Keep the file at the original angle of the cutting tooth while sharpening.
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Expose the Remaining Cutting Edges
Remove the blade from the vise.
Reinstall the battery or batteries and briefly operate the hedge trimmer until the previously unexposed cutting edges are accessible.
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Remove the Battery Again
Stop the motor and remove the battery or batteries before continuing.
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Repeat as Needed
Secure the blade again and repeat the sharpening procedure on the remaining cutting surfaces.
Does the Procedure Vary by Model?
Yes. Some cordless hedge trimmer manuals include an additional positioning step before filing.
For example, the 24V-X2-24HT manual instructs you to briefly start and stop the trimmer so the cutter blade and guard are slightly offset. This creates clearance for the file between the cutter teeth and guard teeth.
After positioning the blades, stop the motor and remove both batteries before sharpening.
After Sharpening
For easier operation and longer blade life, the applicable cordless hedge trimmer manuals recommend lubricating the blades with lightweight machine oil.
Stop the motor and remove the battery or batteries before applying oil. Do not oil the blades while the hedge trimmer is running.
What If the Blade Is Damaged?
Do not continue operating the hedge trimmer with a damaged cutting blade.
If the blade or hedge trimmer requires repair beyond the maintenance procedures described in the operator's manual, do not attempt an unapproved repair.
Check Your Exact Product Manual
Blade design and maintenance instructions can vary by cordless hedge trimmer model. Visit the Shop Joe Product Manuals page and search using your complete model number before sharpening the blades.
Need Help with Your Hedge Trimmer?
If the blade is damaged or you are unsure whether the sharpening procedure applies to your cordless hedge trimmer, contact Shop Joe Customer Support. Have your complete model number and serial number available.