8 september 2026
When to replace Blades? 5 signs of a dull Blade
Short answer: Replace or sharpen your clipper Blade as soon as it pulls on the hair, you have to go over the same spot twice, streaks remain, the Blade gets hot within 2 minutes, or the teeth are visibly damaged. An A5-Blade can usually be sharpened 2 to 4 times before replacement is needed.
A dull Blade is the most underestimated cause of poor grooming results and of dogs losing trust in the clippers. Below are five signs, with an assessment for each sign of whether the Blade is truly the cause.
In short
A dull Blade pulls on the hair instead of cutting it. That hurts.
First check for dirt, oil, and Blade tension before buying a new Blade.
An A5-Blade is the universal, interchangeable Blade that fits almost all professional dog clippers.
Sharpening is usually possible 2 to 4 times; after that, the tooth height has been ground down too far.
A clean coat, oiling, and dry storage extend the lifespan the most. Sand wears faster than operating hours.
Sign 1: the clipper pulls on the hair
Your dog whimpers, pulls their skin away, or turns around as soon as you make a pass. A dull Blade grabs the hair but doesn't cut it.
Dull Blade or something else? Check if there are hairs and dirt between the upper and lower Blade. Brush clean and put a drop of oil on the teeth. If it still pulls afterward, it's dull. A dog that became fearful because of this can get used to the device again with the 7-day acclimatization program.
Sign 2: you have to go over the same spot multiple times
With a sharp Blade, one smooth pass is enough. If you have to go over it three times before the length is right, the Blade only cuts a portion of the hairs with each pass.
Dull Blade or something else? Check if you are working with the hair growth and if the coat is dry and brushed out; a dirty coat also forces repetition. If these are correct, then the Blade is dull.
Sign 3: streaks and an uneven result
Streaks or ridges remain, even with consistent technique. This happens when the teeth are unevenly worn: some still cut, others don't.
Dull Blade or something else? Streaks can also be caused by moving too quickly, a loose attachment comb, or clippers that lose power. Test on a flat section of the back: if the streaky pattern reappears exactly, then it's due to the Blade.
Sign 4: the Blade gets hot faster and more intensely
Every Blade gets warm. A sharp A5-Blade can still be held against your wrist after 5 to 10 minutes. If you can't do that within 2 minutes, there's too much friction.
Dull Blade or something else? Insufficient oil is the primary suspect, followed by too much Blade tension and caked-on hairs. If the Blade remains hot quickly after cleaning and oiling, then the teeth are just rubbing.
Sign 5: visible damage to the Blade
Look over the teeth in daylight. Pay attention to:
Broken teeth, usually from a fall on a hard floor.
Rounded tooth tips instead of sharp, straight points.
Rust or buildup, often after wet storage or a damp coat.
Play between the upper and lower Blade: the upper Blade wobbles or isn't tight.
Dull Blade or something else? Broken teeth and rust cannot be repaired; that Blade is discarded. Play is sometimes caused by a worn spring or guide and can be remedied with parts. A worn drive rotates but makes fewer strokes.
How long does a Blade last?
The lifespan depends on operating hours, not calendar years. This table is a rule of thumb for an A5-Blade.
UsageShaving hours per year (rule of thumb)SharpenReplace 1 dog, every 6-8 weeks3-6 hoursafter 2-3 yearsafter 2-4 sharpenings 2-4 dogs at home10-20 hoursannuallyafter 2-4 sharpenings Hobby breeder or starter50-100 hoursevery 3-6 monthsafter 2-4 sharpenings Grooming salon, daily200+ hoursevery 4-8 weeksafter 2-4 sharpenings
For a dirty or sandy coat, these figures are halved.
Sharpening or replacing: what pays off when?
With professional sharpening, a thin layer of steel is removed from the cutting surface each time. An A5-Blade can usually withstand this 2 to 4 times; after that, the cutting length is no longer accurate, and the Blade heats up faster.
Sharpening is no longer worthwhile with broken teeth, rust, play between the upper and lower Blade, or if the sharpening costs approach that of a new Blade. In such cases, order a new Blade.
Three rules that extend lifespan the most
Only clip a clean, dry, and brushed-out coat.
Oil during use. A drop on the teeth every 10 minutes, with the clippers on; wipe off any excess.
Store dry and protected. Not loose in a drawer where the teeth can hit other tools.
The complete routine is described under maintaining your clippers. If the result is still disappointing, review the step-by-step guide to clipping your dog. If you don't know which Blade number is right for your dog, the selection guide provides advice.
Last updated: August 19, 2026. Author: Clipr Team, specialists in dog clippers and Blades for the Dutch market.
Frequently asked questions
How do I know for sure if my Blade is dull?
Clean the Blade, oil the teeth, and clip a small section on the back. If the clippers still pull on the hair, you have to go over the same spot twice, or the Blade gets too hot to hold within 2 minutes, then it's dull.
How often should I have a Blade sharpened?
For one dog that you clip every 6 to 8 weeks, usually after 2 to 3 years. For multiple dogs, approximately annually, and in a grooming salon, every 4 to 8 weeks. A dirty or sandy coat halves these periods, as sand acts like sandpaper.
Can you sharpen a Blade yourself?
No, that is not recommended. The cutting surface must be sharpened flat and at a fixed angle on a grinding wheel. Attempting to sharpen it yourself with a stone or file will make the surface uneven, causing the Blade to heat up faster and pull on the hair.
What does it cost if I continue to use a dull Blade?
Your dog will experience pain and lose trust in the clippers, the result will be streaky, and the motor will have to work harder, leading to faster wear. A dull Blade is therefore not just a matter of results, but also of welfare and lifespan.
