Attention: If you have any question during use, please contact us at Amazon after-sale service
ROTARY HAMMER
BSK-32MB
Please read the manual carefully before use
How to replace carbon brushes and
lubricants for rotary hammer (BSK-32MB)
Maintenance Guide
How to install the dril bit of the Rotary
Hammer (BSK-32MB) and the correct
use of the adjustment knob
How to contact us for after-sales support
6
7
8
9
1
12
10
11
2
43 5 6
13
14
16
17
15
18
(1) SDS plus chuck
(2) Chuck sleeve
(3) Position depth stop
(4) Lock button depth stop
(5) Grease port cap
(6) Function knob
(7) ON/OFF switch
(8) Function selector drilling/ chiselling
(9) Main handle
(10) Speed control
(11) Cap for carbon brushes
(12) Auxiliary handle
(13) Dusty cover
(14) Carbon brush
(15) Wrench for grease port cap
(16) SDS Plus drill bits
(17) SDS Plus point/ flat chisel
(18) Depth guide
(19) Berserker lubricant grease
19
This rotary hammer (BSK-32MB) is designed
exclusively for medium duty drilling, hammer
drilling, chiseling, and chipping tasks in concrete,
masonry, brickwork, wood, and metal using only
authentic SDS-Plus standard drill bits and chisels.
Drilling holes in concrete, masonry, brick, and
stone (hammer drill mode).
Drilling in wood and metal (drill-only mode).
Medium chiseling, chipping, and surface preparation.
Small-scale tile removal or light demolition (chisel
mode).
Important: This is a medium-power rotary
hammer (not suitable for heavy-duty, continuous
high-load, or thick reinforced concrete breaking).
For thick reinforced concrete, large-scale demoli-
tion, or prolonged heavy tasks, use a higher-pow-
er demolition hammer model.
The tool must be used only for these intended
purposes. Any other use is considered misuse
and is strictly prohibited.
Permitted applications include:
Heavy-duty breaking of thick reinforced concrete
or large structures.
Cutting, grinding, sanding, or polishing.
Driving stakes, posts, or nails (unless with
dedicated bit).
Operation without required PPE, beyond rated
capacity.
Use in explosive, flammable, or extremely wet
environments.
Driving stakes, posts, or nails (unless with
dedicated bit).
Misuse examples (non-exhaustive):
Always unplug the tool before changing bits/chis-
els, selecting modes, adding grease, or perform-
ing maintenance.
Keep hands and body clear of the working area to
avoid injury from flying debris, recoil, or hot
bit/chisel.
Additional Important Warnings
The user/operator-not the manufacturer or
seller-is fully responsible for any damage, injury,
property loss, or other consequences resulting
from misuse, improper operation, or failure to
follow this manual.
Important liability notice:
Always choose the correct SDS-Plus bit or chisel
for the job.
Apply moderate pressure only (do not force the
tool-let the impact energy work).
Take regular breaks to prevent overheating
(medium-power design).
Note for BSK-32MB users:
This rotary hammer is optimized for everyday
home improvement, renovation, and medium
professional tasks. Due to its medium power and
impact energy, it is not designed for heavy-duty or
continuous high-load demolition work. For
demanding tasks, consider a higher-power model,
like BSK-42M, BSK-50F.
ATTENTION: This package can only be used with
SDS-Plus (SDS+) bits — NOT with regular drills,
SDS-Max, or other types of bits. PLEASE CHECK
BEFORE ORDERING.
Safe & effective use tips:
INTENDED USE
Never apply excessive or sideways force. Exces-
sive pressure can cause the bit/chisel to bend,
break, or kick back, resulting in serious personal
injury.
Apply pressure only in line with the chisel.
Start drilling or chiseling with the bit/chisel tip in
firm contact with the workpiece.
Begin at low speed (if adjustable) and with steady
pressure. High speed without contact can cause
the bit/chisel to bend or whip, leading to loss of
control and injury.
Do not use as a general hammer for driving
stakes, posts, or nails unless using a dedicated
post driver bit. Misuse can cause tool failure,
kickback, or serious injury.
This is a medium duty rotary hammer with rotation
and hammer modes. It is not designed for continu-
ous high-load breaking of thick reinforced
concrete or large structures. Use a dedicated
demolition hammer for such tasks.
Never use the tool for pure heavy demolition
tasks.
ROTARY HAMMER SAFETY
WARNINGS
Use only authentic SDS-Plus standard drill bits
and chisels. Non-compliant or counterfeit
bits/chisels may not lock properly and can
damage the chuck or cause injury.
Do not operate in explosive, flammable, or
extremely wet environments.
Always use the supplied auxiliary handle for better
control and reduced fatigue.
Select the correct SDS-Plus bit or chisel for the
task.
Apply moderate pressure only (do not force the
tool-let the impact energy work).
Take regular breaks to prevent overheating
(low-power design).
Use the correct mode for the job:
Drill only: for wood/metal.
Hammer drill: for concrete/masonry.
Chisel/hammer only: for chiseling/chipping.
Recommendation for Safe Use
This rotary hammer is optimized for everyday
home improvement, renovation, and medium
professional tasks (e.g., drilling in masonry,
medium chiseling, tile removal). Due to its medium
power and impact energy, it is not suitable for
heavy-duty, continuous high-load demolition work
or thick reinforced concrete. For such tasks, use a
higher-power rotary hammer or demolition
hammer model, like BSK-42M, BSK-50F.
Special Note for BSK-32MB Users
Avoid hidden hazards
When working in walls, ceilings, floors, or other
enclosed areas, scan for hidden electric cables,
gas pipes, or water pipes using a reliable detector
before starting. Contact with live wires or pipes
can cause electric shock, fire, explosion, or
flooding.
Never reach into moving parts
Do not reach into the tool, near the bit/chisel, or
around the chuck while the tool is running or
plugged in.
Do not remove debris while running
Sawdust, concrete chips, or splinters must not be
removed by hand or tool while the demolition
hammer is operating.
Prevent fatigue-related injury
Prolonged use can cause or worsen fatigue,
muscle strain, or vibration-related disorders (e.g.,
hand-arm vibration syndrome). Take regular
breaks, change tasks, and use anti-vibration
gloves if needed.
Automatic restart risk
If the tool stalls and the switch remains in the ON
position, it may restart automatically when the stall
is cleared-causing sudden kickback. Always
switch off immediately if stalled, release the
trigger, and correct the problem before restarting.
Protect your eyes
Flying dust, debris, and fragments can cause
permanent eye injury. Always wear suitable eye
protection (safety goggles or face shield) that
meets ANSI Z87.1 or equivalent standards.
Protect against dust and debris
Dust from concrete, masonry, brick, or similar
materials can cause serious respiratory injury.
Always wear an appropriate respiratory mask with
filters rated for fine particles (e.g., N95 or higher).
Ensure good workplace ventilation. Do not eat,
drink, or smoke in the work area.
Not for unsupervised use by vulnerable
persons
This tool is not intended for use by children, or by
persons with reduced physical, sensory, or mental
capabilities, or lack of experience and knowl-
edge-unless they are supervised or instructed by
a responsible adult. Children must be supervised
to ensure they do not play with the tool.
Immediate shut-off if the bit/chisel stalls
Switch the tool off immediately if the bit or chisel
stalls. Do not restart while the it is still jammed-this
can cause sudden, violent kickback with high
reactive force, resulting in serious injury.
(Optimized for BSK-32MB Rotary Hammer
SDS-Plus system, medium-duty model).
Common causes of bit/chisel stall
bit/Chisel tilted or angled incorrectly in the
workpiece.
bit/Chisel has pierced completely through the
material.
Tool is overloaded (excessive pressure or
prolonged heavy use).
Identify and correct the cause of the stall before
restarting (see common causes below). Always
follow safety instructions.
Always clamp the material with a suitable clamp-
ing device or vise. Unclamped or loose workpiec-
es can move suddenly, causing severe injury or
tool damage.
Securely clamp the workpiece
ADDITIONAL SAFETY WARNINGS
Keep handles dry and clean
Keep handles and gripping surfaces dry, clean,
and free from oil and grease. Slippery surfaces
reduce control and increase the risk of injury in
unexpected situations.
Burn hazard from hot bit/chisel
The bit or chisel can become extremely hot during
use. Danger of burns exists when:
Changing bits or chisels
Setting the tool down after use
Always wear gloves and allow the bit/chisel to cool
before handling or placing on surfaces.
Protect the power cord
Position the cord so it cannot be stepped on,
tripped over, pinched, cut, or contacted by sharp
edges, moving parts, or hot surfaces. Damaged
cords increase the risk of electric shock or
accidental falls.
Avoid complacency
Do not let familiarity from frequent use cause you
to ignore safety rules. A single careless action can
cause severe injury in a fraction of a second.
Always unplug the tool from the power supply
before performing any maintenance, making
adjustments, changing bits/chisels, cleaning, or
when the tool is not in use. Disconnecting the
power prevents accidental starting that could
cause serious injury.
Use only authentic Berserker replacement parts,
accessories, and attachments. Using non-original
parts may create hazards, reduce performance, or
cause permanent damage to the tool.
MAINTENANCE
For safety and reliability, all repairs, major servic-
ing, or internal adjustments should be performed
by qualified technician. Do not attempt to
disassemble the motor housing or internal
gearbox yourself
.
Never allow brake fluids, gasoline,
petroleum-based products, penetrating oils, or
similar chemicals to contact plastic parts or rubber
seals. These substances can damage, weaken, or
destroy plastic components, potentially leading to
serious personal injury or tool failure.
Clean plastic parts carefully — Avoid solvents,
harsh chemicals, or abrasive cleaners, as most
plastics can be damaged or weakened by them.
Use a clean, dry or slightly damp cloth to wipe off
dust, dirt, concrete residue, or carbon dust.
All internal bearings and gears are pre-lubricat-
ed with high-grade grease.To keep up with the
daily demands on your BSK-32MB, periodic
lubrication is essential to maintain peak perfor-
mance and maximize the tool’s lifespan.
After Each Use: Wipe the tool body, SDS-Plus
chuck area, and cooling vents with a clean cloth
to remove dust and debris.
This is a medium-duty rotary hammer. To
maintain its efficiency and reliability, this
machine requires regular maintenance:
Bit Care: Always clean and apply a thin layer of
grease to the bit or chisel shank before inserting
it into the chuck to reduce friction and wear.
Electrical Safety: Inspect the power cord
regularly for damage, cuts, or wear. If damaged,
it must be replaced by a qualified professional or
an authorized service center.
Cleaning: Use compressed air or a soft brush to
clean the vents and chuck regularly to prevent
internal dust buildup.
Grease Replenishment: It is recommended to
replenish approximately 20-30g of specialized
grease every 40-50 hours of operation. Do not
overfill (do not overfill it should be possible to
see the connecting rod.) to prevent excessive
pressure, which could lead to grease leakage or
motor overheating.
Caution: If the carbon brushes continue to be
used after wearing down to the Limit Line, it will
result in permanent damage to the motor (coil
burnout). It is recommended to replace the
carbon brushes in pairs.
Carbon Brushes: Check carbon brushes
periodically (see diagram F1-F4). Both brushes
must be replaced simultaneously when they are
worn to the limit to protect the motor from
damage.
Storage: Store the tool in a dry, cool place when
not in use. Keep it out of reach of children.
Lubrication & Maintenance
Important Note for BSK-32MB Users
Quick Maintenance Tips
Safety alert
V
Volts
Hz
Hertz
Alternating current
W
Watts
Revolutions per minute
BPM
RPM
Blows per minute
Please read the instructions carefully before
starting the machine.
Do not dispose of waste electrical and
electronic equipment as unsorted municipal
waste. Waste electrical and electronic
equipment must be collected separately.
Waste light sources have to be removed from
the equipment. Check with your local authority
or retailer for recycling advice and collection
point. According to local regulations, retailers
may have an obligation to take back waste
electrical and electronic equipment free of
charge. Your contribution to the reuse and
recycling of waste electrical and electronic
equipment helps to reduce the demand of
raw materials. Waste electrical and electronic
equipment contain valuable and recyclable
materials, which can adversely impact the
environment and the human health if not
disposed of in an environmentally compatible
manner. Delete personal data from waste
equipment, if any.
SYMBOLS ON THE PRODUCT
PRODUCT SPECIFICATIONS
Rated voltage
Output
Chuck type
No-load speed
Max impact rates
Percussion force
Weight
120V-60 Hz
1500 W
SDS-Plus
0-920 Rpm
4250 Bpm
4.43 Ft.lbs.
12 Lbs
A1-A2: How to install bit
A1 A2
CAUTION: Before operation, ensure the auxiliary handle
is securely tightened and fixed to prevent injury caused by
vibration during work.
B1-B2: How to set the
auxiliary handle
B1 B2
How to install the dril bit of the
Rotary Hammer (BSK-32MB).
C1-C2: How to install the depth guide
D1-D2: How to adjust speed
C1
D1
3
D2
C2
E1-E4: How to use rotary hammer
E1 E2
E3 E4
How to correct use of
the adjustment knob
F1 F2
F3 F4
F1-F4: How to change the carbon brush
How to replace carbon brushes and
lubricants for rotary hammer
(BSK-32MB) Maintenance Guide
How to replace carbon brushes and
lubricants for rotary hammer
(BSK-32MB) Maintenance Guide
G1 G2
G3
G5
G4
G1-G5: How to add grease
