Bosch GBH 18V-21 Cordless Rotary Hammer 18v SDS plus

£298.80 £249.00

Free Delivery on orders over £100 or a £5.99 charge applies.


Check our warranty information

Bosch GBH 18V-21 Cordless Rotary Hammer 18v SDS plus


  • Powerful impact system with 2.0 J; three modes (drilling, hammer drilling, chiselling) ensure versatile use
  • Brushless motor reduces the need for maintenance and improves runtime per battery charge, less downtime and increased longevity
  • Good power-to-weight ratio with only 2.4 kg in weight; even capable enough for light chiselling applications


  • Max. impact energy - 2 J
  • Impact rate at rated speed - 0 – 5,100 bpm
  • Rated speed - 0 – 1,800 rpm
  • Weight excl. battery - 2.4 kg
  • Tool holder - SDS plus
  • Tool dimensions (length) - 325 mm
  • Battery voltage - 18 V
  • Charging time (80%/100%) approx. - 48/65 min [4.0 Ah]
  • Noise level - The A-rated noise level of the power tool is typically as follows: Sound pressure level dB(A); Sound power level dB(A). Uncertainty K= dB.
  • Drilling dia. concrete, hammer drill bits, from - 4 mm
  • Drilling dia. concrete, hammer drill bits, up to - 21 mm
  • Drilling dia. in concrete with hammer drill bits - 4 - 21 mm
  • Opt. app. range in concrete with hammer drill bits - 6 - 10 mm
  • Max. drilling diameter in metal - 13 mm
  • Max. drilling diameter in wood - 30 mm
  • Sound pressure level - 90 dB(A)
  • Sound power level - 101 dB(A)
  • Uncertainty K - 3 dB

 Comes with:

  • Carrying case
  • Charger
  • 2 x 4.0ah batteries
  • Depth stop
Customer Questions
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In the unlikely event that you need to return an item, please contact our team on [email protected] within 14 days of accepting delivery of the item. Exemptions to returns may apply in line with current legislation.

All returns must be sent to our distribution centre, details below, however we do request that you discuss the return with one of  friendly team, who will help with the process.



c/o SIG
Unit 10
Kingsmark Freeway
BD12 7HW



Please note all refunds will be made to the card used to order the goods. In the case of returned items a refund will be made when we are in receipt of the item(s). Refunds can take up to three days to show on your account.

All power tools are subject to minimum warranty of 12 months, most offer an extended warranty when your tool is registered online.  Most manufacturers have approved service agents and in the first instance it may be quicker and easier to take the tool to them with your proof of purchase. Your warranty begins from your date of purchase. If you are not near a warranty agent then many of the manufacturers will collect the tool from you. Please find the links below for each manufacturer and their warranty policy and procedures. 

We recommend that where appropriate that you register for the 3 year warranty, this will give you peace of mind when purchasing your tool.  Please note that if the failure of the tool is down to miss use by the operator, or is repaired by non-approved agent then this invalidates the warranty. There is no loan tool service whilst your machine is in for repair and in the majority of cases the machine will be repaired and not replaced. If you are unsure then please do not hesitate to contact us and we will be happy to help.









Free delivery on orders over £100 or a £5.99 charge applies, terms and conditions apply

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