When to replace clipper 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 clipper head 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 necessary.

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 culprit.

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 clipper head.
• An A5 Blade is the universal, interchangeable clipper head that fits almost all professional dog clippers.
• Sharpening is usually possible 2 to 4 times; after that, the tooth height is too worn down.
• A clean coat, oiling, and dry storage extend the lifespan the most. Sand wears blades faster than operating hours.

Sign 1: the clippers pull 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 top and bottom blades. Brush clean and put a drop of oil on the teeth. If it still pulls afterward, it's dull. A dog that became afraid 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 is only cutting 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 conditions are met, then the blade is dull.

Sign 3: streaks and an uneven result

Streaks or ridges remain, even with consistent technique. This happens if 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 area of the back: if the streaking pattern reappears exactly the same, then it's the blade.

Sign 4: the clipper head gets hot faster and more intensely

Every clipper head 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 overly tight blade tension and caked-on hairs. If the head still gets hot quickly after cleaning and oiling, then the teeth are merely 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 corrosion, often after wet storage or a damp coat.
• Play between the top and bottom blades: the top blade wobbles or isn't tight.

Dull blade or something else? Broken teeth and rust cannot be repaired; that head is discarded. Play is sometimes caused by a worn spring or guide and can be remedied with parts. A worn drive may turn, but it makes fewer strokes.

How long does a clipper head last?

The lifespan depends on operating hours, not calendar years. This table is a guideline for an A5 Blade.

For a dirty or sandy coat, these figures are halved.

Sharpening or replacing: what's worthwhile when?

During 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 for broken teeth, rust, play between the top and bottom blades, or if the sharpening costs approach that of a new head. In such cases, order a new clipper head.

Three rules that extend lifespan the most

1. Only clip a clean, dry, and brushed-out coat.
2. Oil during use. A drop on the teeth every 10 minutes, with the clippers running; wipe off any excess.
3. Store dry and protected. Not loose in a drawer where the teeth can hit other tools.

The complete routine is detailed 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 clipper blades for the Dutch market.

Frequently asked questions

How do I know for sure if my clipper 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 head gets too hot to hold within 2 minutes, then it's dull.

How often should I have a clipper head sharpened?

For one dog groomed 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 clipper head 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 are the costs 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.