GSB 18V-21 Combi Drill

£229.952x 2.0Ah + charger + case · at Tooled Up · + £5.95 delivery · Available to order

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18V Professional

GSB 18V-21 Combi drill No product photo yet

Combi Drills · Bosch 18V Professional

Bosch GSB 18V-21 Professional Combi Drill (Body Only)

55Nm2-speed1.3kg bare3 years (with registration)

18V Bosch Professional combi drill with a carbon-brush motor. 55Nm (21Nm soft), 2-speed 0–480/0–1,800rpm, 0–27,000bpm, 13mm keyless chuck, 20 torque settings, LED. 1.3kg bare. Body only.

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Lowest price we track

£229.95at Tooled Up · + £5.95 delivery · Available to order

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Tooled Up Lowest£229.95 + £5.95 delivery · Available to order£235.90View ›

My Tool Shed£229.95 + £5.95 delivery · Available to order£235.90View ›

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55Nm

Max torque

1,800rpm

Max speed

1.3kg

Weight (bare)

1.5–13mm

Chuck size

Where it sits among combi drills

Against the 47 combi drills we list. Not a score: bigger isn't always better for your job.

Max torque55Nm

30Nm lowestMilwaukee M12 BPDhighest 180NmMakita HP003G

Max drilling, wood35mm

21mm lowestMakita HP333Dhighest 89mmMilwaukee M18 FPD2

Weight (bare)1.3kg

0.85kg lightestDeWalt DCD706heaviest 2.1kgMakita HP003G

Blows per minute27,000

22,500 lowestMilwaukee M12 BPDhighest 57,600Festool TPC 18/4

Compare it with: + DeWalt DCD1007 + Makita DHP489 + Einhell TP-CD 18/50-C Li-i BL + Bosch Green AdvancedImpact 18V-80

Full specs

From Bosch's own documentation. Checked 25/09/2026. Report a spec error ›

Performance

Max torque55 Nm

Speed settings2

No-load speed0–480 / 0–1,800 rpm

Impacts per minute27,000

Hammer function✓ Yes

Torque settings20

Voltage18V

Chuck & Drilling

Chuck size1.5–13mm

Chuck typeKeyless

Max wood35 mm

Max masonry10 mm

Max steel10 mm

Physical & Build

Weight (bare)1.3 kg

Weight (with battery)1.9 kg

LED work light✓ Yes

Noise level88 dB(A) LpA / 99 dB(A) LwA

Vibration (drilling metal)< 2.5 m/s²

Vibration (hammer drilling)11 m/s²

The verdictOur take

The GSB 18V-21 is Bosch's entry combi on the 18V Professional platform, with a brushed motor and changeable carbon brushes. 55Nm and 10mm in masonry cover light fixing work, but at 1.3kg bare it is heavier than the brushless GSB 18V-55, which matches its 55Nm at 1.0kg and drills 13mm in masonry.

Powered by Bosch 18V Professional · 13

All 13 batteries that fit this tool, smallest first. Kits and chargers ›

GBA18V-20 2.0Ah · 36Wh 0.35kg 1.65kg £56.99at Machine Mart + £4.99 delivery View at Machine Mart ›

GBA18V-30 3.0Ah 0.6kg 1.9kg No retailer price yet About this battery ›

PROCORE18V-40 4.0Ah · 72Wh 0.52kg 1.82kg from £54.99at Tooled Up + £6.95 delivery View at Tooled Up ›

GBA18V-40 4.0Ah · 72Wh 0.6kg 1.9kg from £73.99at Machine Mart + £4.99 delivery View at Machine Mart ›

EXBA18V-40 4.0Ah · 72Wh 0.61kg 1.91kg No retailer price yet About this battery ›

GBA18V-50 5.0Ah · 90Wh 0.62kg 1.92kg from £85.00at Machine Mart + £4.99 delivery View at Machine Mart ›

PROCORE18V-55 5.5Ah · 99Wh 0.96kg 2.26kg No retailer price yet About this battery ›

EXBA18V-55 5.5Ah · 99Wh 1.02kg 2.32kg from £157.95at Tooled Up + £6.95 delivery View at Tooled Up ›

Tool weight worked out by adding each pack's weight to the bare tool, using the makers' figures. The maker's own with-battery figure can differ slightly. We may earn a commission on retailer links.