Post Pounder vs Hydraulic Breaker: What’s the Difference?
TL;DR: A post pounder drives posts into the ground, while a hydraulic breaker breaks apart rock, concrete, and other hard material. Both mount to an excavator and run on the carrier’s hydraulic power, which is why they get mixed up. The RocxBreaker 750IPH Post Pounder has a purpose-built post-driving head for 4 to 8 ton carriers and shares its power cell with the 750IP hydraulic hammer, so the two attachments have interchangeable parts.
What Is a Post Pounder?
A post pounder, also called a post driver, is a tool that drives fence posts and similar items into the ground. On an excavator, a hydraulic post pounder uses the carrier’s hydraulic power to deliver repeated blows to the top of the post, so the operator can set posts without driving them by hand.
What Is a Hydraulic Breaker?
A hydraulic breaker, also called a hydraulic hammer, mounts to an excavator or skid steer and uses the carrier’s hydraulic force to drive an internal piston. The piston delivers repeated blows to a tool bit, which breaks apart rock, concrete, and other tough materials.
How Are a Post Pounder and a Hydraulic Breaker Different?
- Purpose: a post pounder drives material down into the ground, while a breaker breaks material apart
- Contact point: a post pounder is built to sit on top of a post and drive it straight down, while a breaker strikes through a tool bit
- Typical jobs: a post pounder is used for fence posts and similar posts, while a breaker is used for demolition, trenching, and rock and concrete breaking
- Goal: a post pounder aims for a straight, controlled drive, while a breaker aims to fracture hard material
What Do They Have in Common?
- Both mount to the excavator in place of a bucket and run on the carrier’s hydraulics
- Both deliver repeated blows rather than a single push or pull
- Both need to be matched to the carrier’s weight class and hydraulic setup
What Does the 750IPH Post Pounder Offer?
The RocxBreaker 750IPH Post Pounder is built for 4 to 8 ton carriers and delivers 1,069 ft-lbs of impact energy.
- Purpose-built post-driving head that eliminates the need for manual drivers or separate drop hammer equipment
- Drives standard T-posts and pipe posts to full depth in under 30 seconds in typical soil, according to RocxBreaker
- Post cap adapters available for round pipe, square tube, and H-pile sections
- Shares its power cell with the 750IP, so parts are interchangeable across both attachments
For the full hydraulic requirements, download the 750IPH spec sheet.
How Does the 750IPH Compare to the 750IP Hydraulic Breaker?
- Same carrier class and impact energy: both are rated for 4 to 8 ton carriers with 1,069 ft-lbs
- Different working end: the 750IPH has a post-driving head, while the 750IP uses a 68mm tool that accepts moil, chisel, and specialty bits
- Different jobs: the 750IPH sets posts, while the 750IP breaks dense rock, reinforced concrete, and commercial-scale demolition
- Shared parts: the two attachments share a power cell, which helps when you run both on the same crew
Which One Do You Need?
- Post pounder: setting T-posts and pipe posts quickly and in a straight line
- Hydraulic breaker: breaking rock, concrete, and pavement, or opening up hard ground for trenching and demolition
- Both: on a site with hard or rocky ground, a breaker can open up the ground before posts are set, and a post pounder then drives them
Frequently Asked Questions
Can I use a hydraulic breaker to drive posts?
A breaker’s tool bit is designed to break material, not to drive posts. Post driving needs a tool made for the job, such as a post pounder.
What size excavator do I need for the 750IPH Post Pounder?
It is rated for 4 to 8 ton carriers.
What types of posts can the 750IPH drive?
It drives standard T-posts and pipe posts, and post cap adapters are available for round pipe, square tube, and H-pile sections.
Are parts shared between the 750IPH and the 750IP?
Yes. The two attachments share a power cell, so parts are interchangeable across both.
Not sure which attachment fits your excavator?
Browse the full lineup at rocxbreaker.com or reach out to our team for a recommendation based on your machine and application. Looking to rent? Browse RocxBreaker attachments at rocrents.com.
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