1.7T vs 3.5T Excavator: Which Size Do You Need?
The difference between a 1.7T and 3.5T excavator isn't just size — it's about access, digging depth and the scale of earth you can move. Here's how to pick the right machine.
1.7T Mini Excavator (Kubota U17-3)
$250/dayPros
- 990mm wide — allow extra clearance
- Zero tail swing — won't hit fences
- Lighter — safer on paving/lawns
- Easier to transport on a standard trailer
Cons
- Shallower dig depth
- Smaller bucket — more cycles for big jobs
- Less breakout force for hard ground
Best For
Residential backyards, tight access, post holes, small trenches, plumbing/electrical work
3.5T Excavator (Bobcat E32)
$350/dayPros
- Deeper dig (2.7m+)
- Larger bucket — moves more material per cycle
- Stronger breakout force for compacted/hard ground
- Better for retaining walls and site cuts
Cons
- Needs wider access (1.55m+)
- Heavier — may damage soft ground
- Requires a larger trailer or delivery
Best For
Retaining walls, site cuts, large trenches, demolition prep, bulk earthmoving
Side-by-Side Specs
| Feature | 1.7T Mini Excavator (Kubota U17-3) | 3.5T Excavator (Bobcat E32) |
|---|---|---|
| Daily Rate | $250 | $350 |
| Operating Weight | 1.7T | 3.5T |
| Dig Depth | 2.3m | 2.7m+ |
| Width | 990mm | 1.55m |
| Tail Swing | Zero | Minimal |
| Bucket Capacity | ~40L | ~80L |
| Gate Access | Clearance beyond 990mm | Needs double gate |
| Licence Required | No | No |
The Verdict
If you have a residential backyard and clear access wider than the 1.7T machine's 990mm width, it is a strong all-rounder. If you have wider access and need to move serious earth — retaining walls, site cuts, large trenches — the 3.5T will save you hours. Ask the site assistant and include your narrowest clear access width.
Frequently Asked Questions
Will the 3.5T excavator fit through my gate?
The Bobcat E32 is 1.55m wide. If your access is narrower, the 1.7T is 990mm wide but still needs clearance beyond 990mm. Measure the narrowest clear opening before booking.
How much deeper can the 3.5T dig?
The 3.5T Bobcat E32 digs to 2.7m+ compared to 2.3m on the 1.7T. For most residential trenching (footings, plumbing), 2.3m is sufficient. Deeper excavations for retaining walls or deep drainage benefit from the 3.5T.
Is the 3.5T worth the extra $130/day?
For small jobs, no — the 1.7T is perfect. But for site cuts, large retaining walls or hard compacted ground, the 3.5T's larger bucket and stronger breakout force can halve your digging time, making it cheaper per cubic metre moved.
Other Comparisons
Still not sure which to hire?
Describe the job and narrowest access width to the Stanford Hire Assistant for an instant recommendation.