BOSCH GBH 3-28 DFR
240v 3 function hammer - SDS plus
- 800 Watt
- Variable / reversing
- Max in concrete: 28mm
- Quick change chuck
- Vibration control
- Carry case
- 800 Watt
- Variable / reversing
- Max in concrete: 28mm
- Quick change chuck
- Vibration control
- Carry case
- 800 Watt
- Variable / reversing
- Max in concrete: 28mm
- Quick change chuck
- Vibration control
- Carry case
Bosch GBH 3‑28 DFR
The Bosch GBH 3‑28 DFR is a compact SDS‑Plus rotary hammer designed for fast drilling and chiselling with reduced vibration and strong power‑to‑weight performance. Its quick‑change chuck system allows instant switching between SDS‑Plus and standard cylindrical bits, making it suitable for construction, installation and renovation work where versatility and control are essential.
Key Features:
• DFR quick‑change system for switching between SDS‑Plus and keyless chucks
• Vibration Control for reduced fatigue during continuous drilling
• High drilling speed for fast progress in concrete and masonry
• Balanced power‑to‑weight ratio for comfortable overhead and horizontal use
• Rotation control clutch for user protection if the bit jams
• Variable speed trigger for controlled drilling starts
• Forward and reverse operation for drilling and screw removal
• Compatible with Bosch dust extraction attachments
Technical Specifications:
• Rated input power: 800 W
• Impact energy: 3.1 J
• Impact rate: 4000 bpm
• No‑load speed: 900 rpm
• Max drilling capacity in concrete: 28 mm
• Max drilling capacity in steel: 13 mm
• Max drilling capacity in wood: 30 mm
• Core drilling capacity: 82 mm
• Weight: 3.6 kg
• Tool holder: SDS‑Plus
Included Accessories:
• SDS‑Plus quick‑change chuck
• Keyless quick‑change chuck
• Auxiliary handle
• Depth stop
• Carry case
Alternative: Bosch GBH 2‑28 F
A lighter SDS‑Plus hammer with strong impact performance and excellent vibration control.
An introduction to hammers: Hammers combine a pulsing pressure action, or 'hammer blow', with the rotating of a bit to break through denser materials. The SDS system was originally invented in 1975 by Bosch and translates as 'insert, twist, fits'. The slots on SDS bits enable the back-and-forth hammer blow action whilst still rotating. The drill bit is locked but at the same time can rotate. This system transfers the energy that the hammer builds up internally through to the tip of the drill bit without damaging the chuck. Click here to see all our hammers & breakers
To choose between hammers: There are two considerations when choosing between hammers. Firstly; whether you require the two standard functions of a rotary action (ie drilling) & a rotary hammer action or the 3 functions of drilling, rotary hammer action & hammer only action. Secondly, whether you require the smaller SDS plus shank size drill bit or the larger SDS max shank size. These tools use smaller SDS plus shank size drill /chisel bits and have a lever that selects between 3 functions of drill, rotary hammer & hammer only action. Click here to see all our hammers
To make sure you've got the right 3 function hammer - sds plus: Click here to see all our 3 function hammer - sds plus
High drilling rate and 20% higher chiselling performance than other rotary hammers in its class
Low vibration (only 13 m/s²) for more comfortable working due to Bosch Vibration Control
Quick-change chuck for fast changes between drilling with impact in concrete and drilling without impact in wood and metal
Balanced weight distribution due to L-shaped design for more comfortable working
Rotation stop for chiselling
Ball grommet for preventing cable breaks
Rotating brush plate for equal power in forward and reverse rotation
Impact stop for drilling in wood and metal
Rated power input: 800 W
Max. impact energy: 3,1 J
Impact rate at rated speed: 0 - 4.000 bpm
Rated speed: 0 - 900 rpm
Weight: 3,6 kg
Length: 354 mm
Height: 233 mm
Bit holder: SDS-plus
Drilling diameter in concrete with hammer drill bits: 4 - 28 mm
Optimum range of applications in concrete with hammer drill bits: 12 - 18 mm
Drilling diameter in concrete with core cutters: 68 mm
Max. drilling diameter in masonry with core cutters: 82 mm
Max. drilling diameter in steel: 13 mm
Max. drilling diameter in wood: 30 mm
Right-hand/left-hand rotation
Electronic
Overload clutch
Bosch SDS System
Bosch Blue - Professional
- 1 year warranty can be extended to 3 years (2 years for Batteries/Chargers) by registering the tool online within 30 days of purchase. For full information click here
- To register your tool for extended warranty click here
- Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service
Bosch Garden Tools
- 2 year warranty - for full information click here
- Sign up for free 3 year warranty - click here
- Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service
Bosch Green - DIY
- 2 year warranty - for full information click here
- Sign up for free 3 year warranty - click here
- Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service
- You can order until 8pm for free next working day delivery to nearly all of England and Wales. For locations further from our hub, our cut off is 5pm. Some harder-to-reach locations may take an extra day. More info »
- For most orders we use a premium carrier that notifies you of a one hour timed delivery slot and sends text updates.
- If you change your mind within 30 days of buying a tool, no problem. Provided the tool has not been used and is in its original packaging, please email us at [email protected] quoting your order number, and we'll reply with your return options.
- If the tool is faulty within 30 days of buying it, we will arrange for its collection at no cost to you and supply a replacement.
- If the tool is faulty after 30 days of buying it, and before the expiry of the manufacturer’s warranty, we will guide you through the manufacturer’s warranty process.
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