If you’re comparing stump grinders, one of the most practical questions is: How long will it take to finish the job? Whether you’re a contractor, landscaper, or arborist, every minute on-site adds up, especially when you’re working on a tight schedule or charging by the job.
In this post, we’ll break down the indicative cut times across a range of FSI stump grinders; from compact pedestrian models to hydraulic and tractor-powered machines – so you can get a realistic view of what to expect in the field.
What are indicative cut times?
“Indicative cut times” refer to the estimated time it takes to grind a stump from 15 cm above ground level to 15 cm below under standard working conditions. These estimates are designed to help you compare different FSI models and understand what kind of productivity you can expect on-site.
For hydraulic and tractor-powered machines, performance depends on the tool carrier or tractor meeting FSI’s recommended power requirements. The capacities listed for these machines assume operation with a medium-sized tool carrier, excavator, or tractor that meets these specifications.
The comparisons include cutting time estimates for stumps measuring Ø40 cm, Ø65 cm, and Ø105 cm in diameter.
Actual cut times may vary depending on soil type, root hardness, and operator experience.
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| Machine | Ø40 CM | Ø65 CM | Ø105 CM |
|---|---|---|---|
| ENGINE | |||
| FSI B21 | 12 min | 25 min | 90 min |
| FSI B23 | 10 min | 20 min | 70 min |
| FSI B28 | 7 min | 15 min | 40 min |
| FSI B31-749 | 8 min | 16 min | 45 min |
| FSI B31-980 | 5 min | 11 min | 32 min |
| FSI B38 | 5 min | 10 min | 28 min |
| FSI D30 | 6 min | 12 min | 35 min |
| FSI D60 | 4 min | 7 min | 18 min |
| FSI D74 | 3 min | 6 min | 15 min |
| HYDRAULIC | |||
| FSI H20 / H20S | 25 min | 30 min | 100 min |
| FSI H40 / H40S | 12 min | 25 min | 75 min |
| FSI H52 | 7 min | 18 min | 45 min |
| FSI H65 | 3 min | 6 min | 15 min |
| TRACTOR | |||
| FSI T85 | 8 min | 15 min | 45 min |
| FSI T27 | 6 min | 12 min | 35 min |
| FSI T65 | 3 min | 6 min | 15 min |
