The G20A Pneumatic Air Pick Hammer is not a light-duty tool, and it doesn’t try to be one. This is a jack hammer designed for the kind of breaking work where concrete is thick, material is stubborn, and smaller tools simply run out of strength. As a hand held jack hammer, the G20A pushes into the upper end of pneumatic breakers, combining high impact energy with a solid, stable body.
With a compact overall length of 540mm, a large 48mm piston, and a long 155mm hammer stroke, the G20A delivers an impressive 60J impact energy at 16Hz. Add to that a total weight of 23KG, and you get a Pneumatic jack hammer that is clearly built for serious demolition, roadwork, and heavy industrial applications.
Key Specifications of the G20A Pneumatic Jack Hammer (and Why They Matter)
Looking at the G20A’s data, it’s easy to see how each parameter supports heavy-duty performance:
Machine length: 540mm
Slightly shorter than some long-body models, which helps with balance and control despite the higher weight.Piston diameter: 48mm
This large 48mm piston is a major reason the G20A can reach 60J of impact energy. More piston area means more force behind every strike.Hammer stroke: 155mm
The long 155mm stroke allows energy to build before impact, resulting in deeper, more effective blows.Impact energy: 60J
At 60 joules, this jack hammer is clearly aimed at thick concrete, reinforced surfaces, and compact materials that resist lighter tools.Impact frequency: 16Hz
The 16Hz frequency focuses on heavy, controlled hits rather than rapid chipping, which suits demolition work where penetration matters more than speed.Air hose inner diameter: 19mm
A 19mm hose is essential to maintain airflow. Anything smaller will restrict performance at this power level.Air consumption: 28L/s
The G20A requires 28L/s, meaning it needs a capable compressor to consistently deliver full power.Working pressure: 0.63Mpa
Operating at 0.63Mpa, the tool fits standard industrial pneumatic systems while maintaining stable output.Chisel shank size: 30×87mm
The larger 30×87mm shank matches the higher impact energy, improving durability and reducing energy loss.Total weight: 23KG
At 23KG, this is a heavy hand held jack hammer, but that weight helps keep the tool firmly engaged with the work surface.
Typical Applications for the G20A Hand Held Jack Hammer
Based on its 60J impact energy, 48mm piston, and 23KG weight, the G20A is best suited for:
Heavy concrete and reinforced concrete demolition
Road and bridge breaking projects
Industrial foundation removal
Mining and quarry work
Large-scale infrastructure and maintenance jobs
This Pneumatic jack hammer is built for environments where productivity depends on power and durability, not portability.
Customer-Focused Questions About the G20A (Answered Clearly)
1) Is the G20A still practical as a hand held jack hammer at 23KG?
Yes, but it’s intended mainly for ground-based work. At 23KG, the weight helps reduce bounce and improves energy transfer into the material. For floors, roads, and foundations, the extra mass actually improves efficiency.
2) What makes the G20A stronger than smaller jack hammers?
The combination of a 48mm piston, 155mm stroke, and 60J impact energy. These elements work together to deliver heavier blows that penetrate deeper, especially in hard or reinforced materials.
3) What air supply is required for full performance?
To reach rated output, the system should match:
Working pressure: 0.63Mpa
Air consumption: 28L/s
Air hose inner diameter: 19mm
Using the correct hose size is critical for maintaining consistent power.
4) Why does the G20A use a 30×87mm chisel shank?
At 60J, a larger 30×87mm shank provides better durability and energy transfer. Smaller shanks would wear faster and reduce efficiency.
5) How should this Pneumatic jack hammer be maintained?
For long service life:
Add pneumatic oil before use
Oil every 2 hours during continuous operation
Keep air lines clean and dry
Avoid dry striking
Store the tool with oil if not used for extended periods
These habits are especially important for high-impact tools like the G20A.
Final Thoughts on the G20A Pneumatic Air Pick Hammer
The G20A Pneumatic Air Pick Hammer is a powerful jack hammer built for the toughest breaking jobs. With 60J impact energy, a large 48mm piston, long 155mm stroke, and a stable 23KG body, it delivers deep, controlled impacts that smaller tools can’t match.
If your work involves heavy concrete, road demolition, or industrial foundations, this hand held jack hammer offers the strength, stability, and reliability expected from a professional-grade Pneumatic jack hammer.