How to Change the Bumper on Your Shears

The shear bumper is a small part that plays a big role in how your shears feel and perform. When it wears out or falls off, you may notice excessive noise, harsh blade contact, or an uncomfortable “clack” every time you close your shears.

This guide explains how to change the bumper on your shears, when it should be replaced, and why it matters for performance and longevity. For more professional maintenance guidance, visit our Education Center.

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What Is a Shear Bumper?

The bumper is the small rubber or silicone piece located near the finger rest or handle that cushions blade closure. Its job is to:

• Absorb shock when the blades close
• Reduce noise during cutting
• Protect blade alignment and tension
• Improve comfort during long cutting sessions

Without a functioning bumper, metal-on-metal contact occurs — which accelerates wear and affects control.

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Signs Your Shear Bumper Needs Replacement

• Loud clicking or clacking when closing the shears
• Visible cracking, flattening, or missing bumper
• Harsh or jarring closure feel
• Increased hand fatigue during cutting

Bumpers are consumable parts — replacing them regularly is normal and recommended.

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Tools You’ll Need

• Replacement shear bumper (correct size)
• Tweezers or small needle-nose pliers
• Clean cloth or paper towel

No special tools or advanced skills are required.

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Step-by-Step: How to Change the Bumper on Your Shears

Step 1: Remove the Old Bumper

If the old bumper is still attached, gently pull it out using tweezers or your fingers. If it’s brittle or breaking apart, remove all remaining pieces so the slot is clear.

Step 2: Clean the Bumper Slot

Wipe the bumper slot with a clean cloth to remove hair, oil, or debris. This ensures the new bumper seats properly.

Step 3: Insert the New Bumper

Align the replacement bumper with the slot and press it firmly into place. It should sit snugly without stretching or tearing.

Step 4: Test the Closure

Slowly open and close the shears several times. You should feel a softer, quieter stop when the blades meet.

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Common Mistakes to Avoid

• Using the wrong size bumper
• Stretching the bumper during installation
• Leaving old debris in the slot
• Ignoring tension issues after replacement

If the shears still feel harsh after replacing the bumper, the issue may be tension or alignment — not the bumper itself.

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When a Bumper Replacement Isn’t Enough

A new bumper won’t fix:

• Dull cutting edges
• Improper blade alignment
• Incorrect tension settings

If your shears feel rough, grabby, or inconsistent, professional shear sharpening and maintenance may be necessary to restore proper performance.

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Final Thoughts

Changing the bumper on your shears is a quick, inexpensive maintenance step that protects your tools and improves comfort.

Well-maintained shears close smoothly, cut quietly, and reduce unnecessary strain on your hands — details that matter when you’re cutting all day.

For more shear maintenance education, tension adjustment tips, and professional care guidance, visit our Education Center.