Bosch Professional Impact Drill, 15/16”, 24mm, 1100W – GSB 21-2 RE

84,590

Brand:

  • Bosch Power Tools | Bosch Professional – Precision, Power & Reliability

Bosch GSB 21-2 RE – 1,100 W, 2-speed corded impact drill with Auto-Lock chuck and metal gears; heavy-duty performance for wood, steel & masonry.

  • Rated input power: 1100 W
  • Bit holder: 1/2″-20 UNF
  • Voltage, electrical: 110 V
  • Spindle collar diameter: 0 mm
  • No-load speed, 1st gear: 0 – 900 rpm
  • No-load speed, 2nd gear: 3,000 rpm
  • Power output: 630 W
  • Weight: 2.85 kg
  • Impact rate at no-load speed: 0 – 15,300 / 51,000 bpm
  • Rated speed: 580 / 1,900 rpm
  • Rated torque: 9.6 / 3.2 Nm
  • Drill spindle connecting thread: 1/2″-20 UNF
  • Chuck capacity, min./max.: 1.5 – 13 mm
  • Max. torque: 40.0 Nm
Bulk Order Requests & Customer Support:

Technical data
Additional data
Rated input power: 1100 W
Bit holder: 1/2″-20 UNF
Voltage, electrical: 110 V
Spindle collar diameter: 0 mm
No-load speed, 1st gear: 0 – 900 rpm
No-load speed, 2nd gear: 3,000 rpm
Power output: 630 W
Weight: 2.85 kg
Impact rate at no-load speed: 0 – 15,300 / 51,000 bpm
Rated speed: 580 / 1,900 rpm
Rated torque: 9.6 / 3.2 Nm
Drill spindle connecting thread: 1/2″-20 UNF
Chuck capacity, min./max.: 1.5 – 13 mm
Max. torque: 40.0 Nm

Drilling range
Drilling diameter in wood: 40 / 25 mm
Drilling diameter in steel: 16 / 8 mm
Drilling diameter in masonry: 24 / 16 mm
Total vibration values (Drilling in metal)
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 5.6 m/s²
Total vibration values (Impact drilling in concrete)
Vibration emission value ah: 1.8 m/s²
Uncertainty K: 14.6 m/s²
Total vibration values (Screwdriving)
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 2.5 m/s²
Total vibration values (Thread-cutting)
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 2.5 m/s²

Drilling in metal
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 5.6 m/s²
Impact drilling in concrete
Vibration emission value ah: 1.8 m/s²
Uncertainty K: 14.6 m/s²
Screwdriving
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 2.5 m/s²
Thread-cutting
Vibration emission value ah: 1.5 m/s²
Uncertainty K: 2.5 m/s²

Applications

Ideal for demanding drilling tasks—heavy-duty masonry, metalwork with core cutters and holesaws, screwdriving, and stirring applications where power and durability are critical.

Features

  • Robust metal gear housing offers maximum longevity.

  • Anti-rotation mechanical overload clutch enhances user safety by disengaging if the tool binds.

  • Speed preselection wheel allows tailoring speed to task and material.

  • Auto-Lock keyless chuck enables quick, one-handed bit changes.

  • Comfort & durability enhancements include soft-grip handle, ball cable grommet, and spindle collar compatibility with drill stands.

 

 

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FAQs

What materials can this handle?
Drills up to 40 mm in wood, 16 mm in steel, and 24 mm in masonry on first gear (less on second).
How powerful is it?
Boasts an 1,100 W motor with 630 W output—one of Bosch’s most powerful drills.
What safety features are included?
Features an anti-rotation overload clutch that disengages if the bit binds, protecting both user and tool.
Is it built for long-term use?
Absolutely. The sturdy metal gear housing and ergonomic design withstand tough, extended use.