Head to head
Bona FlexiSand 1.9 vs Bosch Professional GSB 18V-90 C
The Bona FlexiSand 1.9 is a single-disc rotary floor sanding and buffing machine. The Bosch Professional GSB 18V-90 C is a 18v brushless combi drill/driver with bluetooth connectivity.
Last reviewed 13 September 2026
Specifications side by side
| Bona FlexiSand 1.9 | Bosch Professional GSB 18V-90 C | |
|---|---|---|
| Weight | 50kg (plus optional 11kg magnetic weight) | 1.2 kg (excl. battery) |
| Power | 1.9kW | - |
| Voltage | 230V, 50Hz, 11A | - |
| Disc diameter | 407mm (16in) | - |
| Max torque | - | 65 / 36 Nm (hard/soft) |
| Chuck | - | 13mm metal |
| No-load speed | - | 0-630 / 0-2100 rpm |
| Impact rate | - | 29,500 bpm |
Sources: Bona FlexiSand 1.9, Bosch Professional GSB 18V-90 C. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the FlexiSand 1.9 if...
A single-disc rotary sander used for buffing, screening and light sanding rather than heavy stock removal, which is why floor contractors keep one alongside a belt or drum sander rather than instead of one. Its 407mm disc and 1.9kW motor put it in the same bracket as other single-phase rotary buffers sold through UK flooring trade counters.
Listed by
Buy or hire the GSB 18V-90 C if...
This combi drill sits in Bosch Professional's Biturbo 18V range for builders who want connected tool tracking alongside solid drilling performance. It is a common counterpart to the corded GBH 2-28 F for buyers moving their kit over to battery power.
Full GSB 18V-90 C specifications →Common questions
What is the difference between the Bona FlexiSand 1.9 and the Bosch Professional GSB 18V-90 C?
The Bona FlexiSand 1.9 is a single-disc rotary floor sanding and buffing machine; the Bosch Professional GSB 18V-90 C is a 18V brushless combi drill/driver with Bluetooth connectivity.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.