The document summarizes features of three rotary hammers: Bosch GBH2-26DRE, Makita HR2470, and DeWalt D25133K. It lists features users like and dislike for each tool, as well as potential solutions to problems experienced. The tools have similar power input, impact energy, speed ranges, and weight, but differ in maximum drill and core cutter diameters as well as tool holder type. Common issues involved vibration levels, wear of moving parts, and inadequate storage for accessories.

1. compiled by Georgi Doychev, mailto: gdoychev@yahoo.com

2. BOSCH GBH2-26DRE Power input 800W
Impact energy 2,7 J
Rated speed 0-900 rpm
Weight 2,8 kg
Drill bits dia. concrete 4-26 mm
Core cutter max dia. 68 mm
Tool holder SDS+
Features liked by users Features disliked by users Solutions to prevent occurred problems:
High power motor and impact Depth gauge knob gets clogged
easily with dust
Regular and accurate knob cleaning may
reduce such danger
Reliable &robust with long
lifetime
High vibration rates The next generation model GBH2-28 solves
the problem because of built-in AVC system
Easy to fix forward-reverse
mode
Chuck inner slots get damaged
quickly
Regular drill bit cleaning and greasing (before
starting the job) reduces the threat significantly
Large case with enough space
to fit various accs
Tool body gets hot under loading It’s normal. That’s why it is recommended the
tool to rest for a few minutes in every 20
minutes work.
Flexible cord compiled by Georgi Doychev, mailto: gdoychev@yahoo.com

3. MAKITA HR2470 Power input 780W
Impact energy 2,7 J
Rated speed 0-1100 rpm
Weight 2,6 kg
Drill bits dia. concrete 4-24 mm
Core cutter max dia. 65 mm
Tool holder SDS+
Features liked by users Features disliked by users Solutions to prevent occurred problems:
Low vibration Forward-reverse setting slider gets
damaged quickly.
Rotate periodically forward-reverse mode so
that dust and dirt around to be cleared.
Convenient grip No knob for quick change of the
side handle position
In the next generation models like HR2610
that feature is available.
Bumper to protect the mode
switch from breakage
Chiseling is weak It’s normal for rotary hammers since their main
feature is hammer drilling.
4 m cord Chuck wobbles while in action This is usual for rotary hammers since they
have to provide an accurate hammer action.
Enough space for various accs
in the case
compiled by Georgi Doychev, mailto: gdoychev@yahoo.com

4. DEWALT D25133K Power input 800W
Impact energy 2,6 J
Rated speed 0-1500 rpm
Weight 2,6 kg
Drill bits dia. concrete 4-26 mm
Core cutter max dia. 50 mm
Tool holder SDS+
Features liked by users Features disliked by users Solutions to prevent occurred problems:
Easy to handle mode switch Hammer action requires drill bit
pushing to the material
It is a distinctive feature for the model aimed to
extend tool’s life
Solid rubber cover on the back
handle
High vibration on higher power There is a next generation model /D25263K/
where built-in AVC system is available
Lightweight Carrying case too small /no place
for accs/
The producer has a range of cases and other
carrying units suitable for accs storage
Larger opening at the rear
handle bottom to easily fasten
the tool if working on height,
ladder or scaffold
compiled by Georgi Doychev, mailto: gdoychev@yahoo.com