Head to head
Bobcat E55z vs Komatsu D51PX
The Komatsu D51PX is the bigger machine by 8,909kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 8,909kg.
Specifications side by side
| Bobcat E55z | Komatsu D51PX | |
|---|---|---|
| Operating weight | 5271kg | 14,180kg |
| Dig depth | 3434mm | - |
| Engine power | 36.4kW | - |
| Breakout force | 30.99kN | - |
| Class | - | 14 tonne |
Sources: Bobcat E55z, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the E55z if...
A midi excavator for groundworks, utilities and landscaping contractors. At 5.3 tonnes it arrives on a lorry rather than behind a car. It digs to 3434mm. Zero tail swing means the back of the machine stays inside the tracks when it slews, so it can work tight against a wall or in one lane of a road.
Listed by
Buy or hire the D51PX if...
- you want one that is the bigger machine by 8,909kg
A mid-size dozer built with wider, low ground pressure tracks for soft or wet ground. Groundworks and landfill contractors choose the PX variant over a standard-track D51 where the ground itself would otherwise bog a machine down.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Common questions
What is the difference between the Bobcat E55z and the Komatsu D51PX?
The Komatsu D51PX is the bigger machine by 8,909kg. The Bobcat E55z is a midi excavator, zero tail swing, 3 to 6 tonnes; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
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