helpful tips and tricks on how to use your rotary hammer for a long time at low cost

2. Rule #1
Clean and grease the shank end
of the drill bit/chisel before
inserting it into the SDS chuck. In
this way, both the chuck and
hammer mechanism will last
longer.

3. Rule #2
In continuous use, do regular
breaks in every 15-20 minutes. In
such a fashion, the grease
restores its optimal properties
needed for the trouble free work
of the hammer mechanism.

4. Rule #3
After prolonged use, leave your
hammer running for 1-2 minutes
at max speed without load. In this
manner, the motor is better
cooled which increases its service
life.

5. Rule #4
In cold weather or after long
period of storage, the hammer
action may not start at once. In
such a case, impact manually
with the drill bit/chisel (as inserted
in the chuck) on the ground. Pull
the trigger and leave the tool
running for a minute without load.

6. Rule #5
Switching working modes (drilling,
hammer drilling or chiseling) may
get the mode selector stuck. If so,
turn manually the chuck left wise
and right wise before moving the
mode switch further.

7. Rule #6
Apply the chiseling mode only for
small scale and short-lasting
tasks - plaster or tiles removal,
cable or pipe channeling, etc.
Otherwise, the hammer
mechanism may get damaged.
For large scale chiseling tasks,
you would better use a demolition
hammer.

8. Rule #7
Avoid mixing mortars, plaster,
adhesives or other liquids of high
viscosity. Otherwise, the safety
clutch may get damaged.

9. Rule #8
Avoid driving series of large
diameter screws. Otherwise, like
the case with mixing, it will
increase the strain on the clutch
causing its premature damage.

10. Rule #9
You would better use drill bits and
chisels from trusted, well
established producers. Low cost
accessories may have larger SDS
slots which do not fit well into the
chuck. As a result, the strain on
the chuck is increased leading to
its damage.

11. Rule #10
If you use the tool quite frequently
(for example, in your profession) it
is worthwhile to bring it at least
once in a year to an authorized
service centre for a preventive
check. In this way, the hammer is
more likely to operate trouble free
for a long period.

12. summarized by Georgi Doychev