| Technical Specification | |
| Model | BMR85Y |
| Engine | Air-cooled,4-cycle,single cylinder |
| Engine Type | Diesel,Yanmar L4BN |
| Power kw(hp) | 3.1(4.2) |
| Operation Mass kg(lbs) | 83(182) |
| Percussion Rate per min | 640-680 |
| Impact Force KN | 14 |
| Jumping Stroke mm | 40-80 |
| Fuel Tank Capacity L | 2.8 |
| Shoe Size mm(in) | 330×285(13×11) |
| Dimension mm(in) | 400x760x1020(17x31x40) |
A tamping rammer (or “jumping jack”) is a high-impact, vertical compaction machine used to densify cohesive soils, gravel, and sand in confined spaces, trenches, and foundation work. Typically powered by a 4-stroke petrol engine, it uses a reciprocating, jumping motion to remove air pockets, offering deeper compaction than plate compactors.
Key Features & Uses
Best for Tight Spaces: Ideal for trenches, pipe bedding, and retaining walls where larger machines cannot fit.
High Compaction Power: Delivers high-energy impacts to create solid, stable foundations.
Operating Principle: Uses a “jumping” action to force air out of loose materials.
Ramming Foot: A flat, heavy bottom that strikes the ground.
Bellows: Protects the jumping mechanism and provides the vertical motion.
Vibration Reduction: Advanced models feature specialized handles to reduce vibration transfer to the operator.
- Customization Options: As a leading Construction Machinery & Warehouse Equipment Supplier, we offer OEM services
