Can dull carton sealer blades be sharpened?
- The Truth About Blade Dulling
Carton sealer blades become dull over time, just like a pencil with a bald lead. The root cause is wear on the cutting edge. Carbide blades can indeed be sharpened, but be aware of the following:
Carbon steel blades can be sharpened 3-5 times.
Sharpening coated blades will damage the rust-resistant coating if sharpened.
Serrated blades require specialized tools for sharpening.
- DIY Sharpening Guide
Prepare a whetstone or sandpaper to give your blades a new lease of life:
Disassembling the blade: Remove the retaining screw with a screwdriver.
Sharpening Angle: Maintain a 15-20 degree bevel and rub evenly.
Testing Sharpness: Easily cuts through kraft paper.
Cleaning and Installation: Remove any metal debris and reinstall the blade.
- When to Replace the Blade
Signals that indicate it’s time to retire the blade include:
Frequent paper jams after sharpening.
Noticeable chipping on the cutting edge.
Wear of more than 1/3 of the blade thickness.
Rough edges on the carton during cutting.
