Hydraulic Breaker Buffer (Damper Block): Essential Shock Absorbers for Hydraulic Hammers

Introduction

Hydraulic breakers, also called rock breakers or hydraulic hammers, are heavy-duty machines used in construction, demolition, quarrying, and mining. To protect these machines from continuous vibration and high impact, buffer blocks—also known as breaker damper blocks, shock absorbers, or cushion pads—are essential spare parts.

A breaker buffer is not just one part; it is typically divided into upper buffers, lower buffers, and side buffers, each with a unique role in absorbing impact and reducing stress on the breaker.

Types of Hydraulic Breaker Buffers

1. Upper Buffer (Top Cushion Block)

Installed at the upper part of the breaker

Absorbs vibration from the piston’s upward movement

Prevents metal-to-metal contact inside the breaker housing

2. Lower Buffer (Bottom Cushion Block)

Positioned at the lower part of the breaker

Bears the direct impact during operation

Protects the tool bushing and piston from excessive shock

3. Side Buffer (Side Damper Pad)

Installed on the left and right sides of the breaker body

Reduces side vibration and stabilizes the hammer during operation

Prevents structural deformation and prolongs service life

👉 Together, these three types of buffers ensure that the hydraulic breaker operates smoothly, with less wear and tear on internal parts.

Materials: PU vs Rubber Buffers

Hydraulic breaker buffers are generally made of high-strength polyurethane (PU) or rubber:

Rubber Buffers: Affordable, flexible, widely used in older breaker models.

Polyurethane Buffers: Longer service life, superior vibration absorption, excellent resistance to oil, heat, and harsh environments.

Modern breakers increasingly prefer PU buffers because they provide more durability and reduce maintenance costs.

Benefits of High-Quality Breaker Buffers

Shock absorption: Reduces vibration and impact force

Machine protection: Prevents premature wear of pistons, bushings, and cylinders

Extended service life: Reduces downtime and maintenance costs

Noise reduction: Improves operator comfort and safety

Stable performance: Keeps the breaker running smoothly in demanding conditions

Other Common Names for Breaker Buffers

Different customers and regions may call these parts:

Breaker buffer block

Breaker damper block

Breaker shock pad

Breaker cushion block

Breaker vibration pad

PU breaker block

Hydraulic hammer buffer

By including these terms, you can easily find the right parts when searching or making inquiries.

Applications

Breaker buffers are widely used in:

Mining – protecting breakers during rock excavation

Construction – ensuring stability during foundation and roadwork

Demolition – absorbing heavy impacts when breaking concrete

Quarrying – extending breaker lifespan during stone crushing

Rental equipment – lowering repair costs for frequently used breakers

Our Advantages

As a professional manufacturer of polyurethane spare parts, we supply a wide range of hydraulic breaker buffers:

Upper, lower, and side buffers for different breaker models

Premium PU material with higher wear resistance

OEM customization according to drawings and breaker models

Strict quality control to ensure consistent performance

Global supply experience with mining, construction, and demolition industries

FAQ

Q1: Do all breakers use upper, lower, and side buffers?
Most medium and large hydraulic breakers are equipped with all three types of buffers, while some smaller models may use fewer.

Q2: How often should I replace a buffer block?
Replacement depends on working conditions, but typically every 6–12 months in heavy-duty applications.

Q3: Can you supply buffers for specific brands like Atlas Copco, Furukawa, Soosan, or NPK?
Yes, we manufacture compatible buffers for most major breaker brands, and we also provide custom solutions.

Conclusion

The hydraulic breaker buffer block—whether upper, lower, or side—is a critical spare part that protects the breaker from shock and vibration. Choosing high-quality PU or rubber buffers ensures longer service life, lower maintenance costs, and better performance on construction and mining sites.

If you are looking for durable breaker damper blocks, cushion pads, or shock absorbers, contact us today for a quotation. We provide factory-direct supply, OEM services, and customized solutions for hydraulic breaker spare parts.