Makita HP2050 Manual

Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output(W)
110
120 720
720
720
720
720
360
360
360
360
360
660
660
660
660
660
220
230
240
* Chuck key S-13 (only for HP2050 and hP2050F) ................. 1 pc.
* Key holder (only for HP2050 and hP2050F) ........................ 1 pc.
* Depth guide ............................................................................ 1 pc.
* Side grip set ........................................................................... 1 pc.
* Plastic carrying case ............................................................... 1 pc.
6.9
6.6
3.4
3.3
3.2
Models No.
Description
PRODUCT
Current (A)
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
< Note > The standard equipment for the tool shown may differ from country to country.
P 1 / 17
HP2050, HP2050F, HP2051, HP2051F
Makita new 700W class hammer drills with extra low
vibration level, yet with superior working performance has just been
released.
The features and benefits are :
* Slim and smart shape hammer drills, yet loaded with torque limiter
* Extra-low vibration level for comfortable and less fatigue operation
* Model HP2050F and HP2051F are equipped
with built-in job light
* HP2051 and HP2051F are equipped with
keyless drill chucks.
2 Speed Hammer Drills 20mm
Dimensions : mm ( " )
Width ( W )
Height ( H )
Length ( L )
Model No. 360 (14-1/8)
220 (8-5/8)
70 (2-3/4)
L
H
W
50 / 60
50 / 60
50 / 60
50 / 60
50 / 60
Blows per min.
: (min -1= bpm)
Concrete
Model No. HP2050. 0 - 2,900
0 - 58,000
0 - 24,000
0 - 1,200
HP2050F HP2051 HP2051F.
Chuck ability : mm ( " )
Keyless chuck
Reverse switch
LED job light
No load speed
: (min -1= rpm)
Drilling capacity
: mm ( " ) Steel
Wood
Protection from electric shock
Net weight :Kg (lbs )
Cord length : m ( ft )
(High)
(Low)
(High)
(Low)
(High)
(Low)
(High)
(Low)
(High)
(Low)
Yes Yes
Yes YesNo
No
No
No
1.5 - 13.0 (1/16 - 1/2)
20 (3/4)
20 (3/4)
40 (1-9/16)
25 (1)
13 (1/2)
8 (5/16)
by double insulation
Yes
2.5 (8.2)
2.3 (5.1)
* TCT. drill bit 5 - 19mm
* Drill bit for metal 13mm
* Drill bit for wood 40mm
* Center drill bit for hole saw 16 - 90mm
* Metal borer 14 - 35mm
* Depth guide
* Wrench 9
* Blow-out bulb
* Keyless drill chuck
* Drill chuck set
* Side grip set
* Type 43 drill stand
* Chuck key S-13
(for HP2050, HP2050F)
372 (14-1/4)
HP2050(F) HP2051(F)

Features and benefits P 2 / 17
2-speed mechanical
gear selection, High-Low
Cord guard is not only tough
but also very flexible to
protect cable from
disconnection.
LED job light for lighting up
at working point.
only HP2050F/ HP2051F
Slim body designed for
better maneuverability
Variable speed control switch with
big trigger and speed control dial Lock-ON button for
continuous operation
In-line design handle
for better work efficiency
Palm fitting
soft grip
Large lever has made it easy
to change the working modes.
Drill mode Hammer drill mode
Equipped with torque limiter for
protection of user and mechanism
from accidental lock of drill bit
Sturdy aluminum gear housing
Lever for F/R change
Comparison of products
Blows per min.
: (min -1= bpm)
Concrete
: mm ( " )
Model No. MAKITA Competitor A
HP2050 (F) HP2051 (F) HP2032 HP2033 Model A-1 Model A-2
Keyless chuck
Torque limiter
LED job light
No load speed
: (min -1= rpm)
Drilling capacity
Steel
: mm ( " )
Wood
: mm ( " )
Protection from electric shock
Net weight
:Kg (lbs )
Cord length : m ( ft )
(High)
(Low)
(High)
(Low)
(High)
(Low)
(High)
(Low)
Specifications
Dimensions
Length : mm
( " )
Width : mm
( " )
Height : mm
( " )
Power Input : W
Vibration in hammer drill mode
(blowing direction) : m/s2 *
Noise level in hammer
drill mode : dB(A)
705 705720 720
6.36.0 7.0 11.3
9697 9898
2.6 (5.8) 2.3 (5.1)
2.5 (8.2) 2.5 (8.2)2.5 (8.2) 2.5 (8.2)
0 - 1,000 0 - 1,000
0 - 3,000
0 - 2,400
0 - 20,000 0 - 19,000
0 - 57,0000 - 48,000
0 - 1,200 0 - 850
0 - 2,900 0 - 2,900
0 - 24,000
0 - 58,000
0 - 9,400
0 - 32,000
Yes Yes
Yes Yes
No No
16 (5/8) 20 (3/4)20 (3/4) 20 (3/4)
20 (3/4) 20 (3/4)
30 (1-3/16)
25 (1)
40 (1-9/16) 25 (1) 40 (1-9/16) 30 (1-3/16)
13 (1/2) 13 (1/2)
8 (5/16)
13 (1/2)
8 (5/16) 13 (1/2) 8 (5/16) 8 (5/16)
By double insulationBy double insulation
350
(13-3/4) 345 (13-5/8)
185
(7-1/4) 190 (7-1/2)
65
(2-9/16) 72 (2-13/16)
No NoYes
No
No
Yes
Yes (only F type)
Yes
360
(14-1/8)
372
(14-1/4)
220
(8-5/8)
70
(2-3/4)
370
(14-1/2) 368 (14-1/8)
195
(7-5/8)
75
(2-15/16)
2.3 (5.1) 2.5 (5.5)
* measured by MAKITA under the loaded condition

P 3 / 17
Comparison of working rate
comparison of products
Numbers in chart below are relative values when setting Model A-1 's capacity as 100.
Testing conditions
* Work piece : Mortar
* Pressure added to the products : 150 N
* When hammer drilling with :ø 24 mm (15/16") bit
Mortar 150 N
* When hammer drilling with ø 8mm (5/16") bit * When hammer drilling with ø 12.5mm (1/2") bit
* When hammer drilling with ø 19mm (3/4") bit
50 100 150 2000
Competitor A
Model A-1
Competitor A
Model A-2
MAKITA
HP2050(F)/HP2051(F) MAKITA HP2050(F)/HP2051(F)
100
50 100 150 2000
100
50 100 150 2000
100
110 110
120
120
115120
Douglas fir
Competitor A
Model A-1
Competitor A
Model A-2
Competitor A
Model A-1
Competitor A
Model A-2
Competitor A
Model A-1
Competitor A
Model A-2
* When hammer drilling with ø16mm (5/8") bit
50 100 150 2000
100
50 100 150 2000
100
100 105
130110
* When hammer drilling with ø 36mm (1-7/16") bit
50 100 150 2000
100
100
125
Testing conditions
* Work piece : Douglas fir (Wood)
* Working mode : Drill / High Speed * Working mode : Drill / Low Speed
Competitor A
Model A-1
Competitor A
Model A-2
Competitor A
Model A-1
Competitor A
Model A-2
MAKITA
HP2050(F)/HP2051(F) MAKITA HP2050(F)/HP2051(F)
MAKITA
HP2050(F)/HP2051(F)
MAKITA
HP2050(F)/HP2051(F)

Repair P 4 / 17
< 1 > Lubrication
< 2 >Assembling and disassembling
( 1 ) Disassembling drill chuck See Fig. 2.
1. Hold the flat portion of spindle with No.1R139 "drill chuck extractor" which is fixed with vise.
2. Insert No.1R298 "hex wrench" into drill chuck and grip it firmly with drill chuck.
3. Turn No.1R298 "hex wrench" anti-clockwise, with No.1R223 "torque wrench" to which No.1R224
"ratchet head" is attached. Then, drill chuck can be disassembled from spindle.
Apply MAKITA grease N No.1 to the following portions marked with black triangle to protect parts and machine
from unusual abrasion. See Fig. 1.
Spindle
Cam
Apply 25g of MAKITA grease N No.1
to the inner part of gear housing.
Gear housing
Gear housing
Spur gear 29-37
Change lever B
Fig. 1
No.1R139 Drill chuck extractor
No.1R298 Hex wrench
No.1R223
Torque wrench
No.1R224
Ratchet head
Fig. 2
In case of broken drill chuck, it may be impossible to grip hex wrench with drill chuck.
If so, firmly grip drill chuck with pipe wrench. And turn the pipe wrench anti-clockwise.
So, the drill chuck can be disassembled.
( 2) Assembling drill chuck See Fig. 2.
1. Preset the torque level of No.1R223 "torque wrench" to 35.7N.m - 45.9N.m (350kgf.cm - 450kgf.cm).
2. Hold the flat portion of spindle with No.1R139 "drill chuck extractor" which is fixed with vise
3. Insert No.1R298 "hex wrench" into drill chuck and grip it firmly with drill chuck.
4. Turn No.1R298 "hex wrench" clockwise, with No.1R223 "torque wrench" to which No.1R224
"ratchet head" is attached. Then, drill chuck can be assembled to spindle.
Fastening
Loosening

Repair P 5 / 17
( 3) Disassembling gear section See Fig. 3.
1. Separate gear housing cover from gear housing.
2. Pull out lock plate.
3. Then change lever B, pin, rack 12 with change plate B and spur gear 29-37
can be disassembled from gear housing.
( 4) Assembling gear section
1. Assemble the spindle section to gear housing as illustrated Fig. 4 below.
Gear housing cover
Gear housing Lock plate
Change lever B Pin
Rack 12 Change plate B
Spur gear 29-37
Ring spring 11
Fig. 3
Fig. 4
Gear housing
Bearing retainer 20-36
Spindle section (including conical
compression spring 15-2, cup washer 15,
ball bearing 6202LLB and cam A)
2. Insert change plate B into rack 12 as illustrated Fig. 5 right.
3. Set the above assembled one to spur gear 29-37 as illustrated Fig. 6 right.
4. Make sure that leaf spring is assembled in
gear housing in advance. If not, assemble it.
Assemble spur gear 29-37 to spindle
and at the same time, assemble rack 12 w/ change plate B
to gear housing as illustrated in Fig. 7 right.
Rack 12 Change plate B
Fig. 5
Spur gear 29-37
Fig. 6
Leaf spring Spur gear 29-37
Rack 12 with change plate B
Gear housing
Spindle
Fig. 7
Oil seal 19
When assembling bearing retainer 20-36 and oil seal 19,
refer to "( 6) Assembling bearing retainer 20-36 and oil seal 19" at page 7.

Repair P 6 / 17
Pin 4
Rack 12
Spur gear 29-37
Spindle
Lock plate
Change lever B
4. Insert pin 4 through rack 12 into gear housing.
And then, rush rack 12 until it reaches the bottom wall
of gear housing. See Fig. 8.
Keeping the above position of rack 12, assemble change lever B
to gear housing with aligning its "I" mark to the triangle mark of
gear housing. See Fig. 8 and Fig. 8A.
5. Assemble lock plate to gear housing with setting
its tail portion between ribs of gear housing.
5. Assemble gear complete to the gear housing as illustrated
in Fig. 9.
Rib
Gear complete
Fig. 8A
Fig. 8
Fig. 9

Repair P 7 / 17
( 5) Disassembling bearing retainer 20-36 and oil seal 19
1. Remodel the top portion of No.1R292 "wrench for bearing retainer" by grinding, in order to fit it
on the spindle head. See Fig. 10.
( 6) Assembling bearing retainer 20-36 and oil seal 19
1. Apply MAKITA grease N No.1 to oil seal, and assemble oil seal 19 pressing with arbor press. See Fig. 12.
<Note in assembling>
Oil seal has to be always replaced with fresh one. Because it is easily deformed,when disassembling. Fig. 12
2. Turn 1R292 "wrench for bearing retainer" clockwise. Then bearing retainer 20-36 can be removed from
gear housing. See Fig. 11. And then, take off oil seal 19 with flat head screwdriver.
Remodel by grinding this
portion to fit it on spindle
head.
No.1R292 Wrench
for bearing retainer
Fig. 10
1R292 Wrench for bearing retainer
Fig. 11
2. Assemble bearing retainer 20-36 with No.1R292 "wrench for bearing retainer" by turning it anti-clockwise.
See Fig. 13.
Loosening
1R030 Bearing
setting pipe
Arbor press
Oil seal 19
1R292 Wrench
for bearing retainer
Fastening
Bearing retainer 20-36
Fig. 12 Fig. 13

Repair P 8 / 17
( 7) Disassembling cam A
1. After removing bearing retainer 20-36 and oil seal 19, disassemble ring spring 11 from spindle.
And disassemble spindle section by pulling out from the drill chuck side of gear housing
as illustrated in Fig 14.
( 8) Assembling cam A
1. Assemble conical compression spring 15-24 and cup washer 15 to spindle. When assembling, they have to be
assembled as illustrated in Fig. 16A.
Ring spring 11
Gear housing
Spindle section (including conical
compression spring 15-2, cup washer 15,
ball bearing 6202LLB and cam A)
Fig. 14
Fig. 15
2. Accept ball bearing 6202 LLB with 1R232 "pipe 30", and press spindle with arbor press.
So, cam A, ball bearing 6202LLB, cup washer 15 and conical compression spring 15-24 can be separated
from spindle as illustrated in Fig. 15.
Ball bearing
6202 LLB
Cam A
Spindle
Spindle
1R232 Pipe 30
Ball bearing 6202 LLB
Cam A
Conical compression spring 15-24
Cup washer 15
Fig. 16A Fig. 16B
Cup washer 15
Conical compression
spring 15-24
1R232 Pipe 30

Repair P 9 / 17
2. Put the spindle on 1R035 "bearing setting plate" and assemble ball bearing 6202LLB and cam A to the spindle
by pressing with arbor press as illustrated in Fig. 17.
Ball bearing
6202 LLB
Ball bearing
6202 LLB
Cam A
Cam A
Conical compression
spring 15-24
Cup washer 15
Spindle
1R035 Bearing
setting plate
1R029 Bearing
setting pipe
1R030 Bearing
setting pipe
Fig. 17

Circuit diagram P 10 / 17
HP2050F and HP2051F (equipped with flash light)
For Europe, High voltage area
2
4
3
1
2
1
M2
M1
C2
C1
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
LED
circuit
LED
Brush
holder Brush
holder
Field A
Field B
Field A
Field B
Noise
suppressor
Connected to
field core
Choke coil
Insulated
terminal
Noise
suppressor
Insulated
terminal
Power supply cord

Circuit diagram P 11 / 17
HP2050 and HP2051 (without flash light)
For Europe, High voltage area
2
4
3
1
2
1
M2
M1
C2
C1
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
Brush
holder Brush
holder
Field A
Field B
Field A
Field B
Noise
suppressor
Power supply cord
Connected to
field core
Choke coil
Insulated
terminal
Noise
suppressor
Insulated
terminal

Circuit diagram P 12 / 17
HP2050 and HP2051 (without flash light)
For Great Britain, low voltage
2
4
3
1
2
1
M2
M1
C2
C1
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
Brush
holder Brush
holder
Field A
Field B
Field A
Field B
Noise
suppressor
Power supply cord
Connected to
field core
Choke coil

Circuit diagram P 13 / 17
HP2050 and HP2051 (without flash light)
For other countries
2
4
3
1
2
1
M2
M1
C2
C1
Color index of lead wires
Black
White
Red
Orange
Blue
Brush
holder Brush
holder
Field A
Field B
Field A
Field B
Noise
suppressor
Power supply cord

Wiring diagram P 14 / 17
Brush holder
Noise suppressor
Brush holder
Switch
HP2050F and HP2051F (equipped with flash light)
For Europe, High voltage area
* Choke coil
* Noise suppressor * Insulated terminal
The electrical parts marked with * have to be
set in the illustrated position.
Fix the lead wires passed
through this portion, with
lead holder Fix with lead holder
the lead wires passed
through this portion
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to brush holder
* Lead wire (black) connecting
field terminals A and B
Fix the following lead wires
with this lead holder.
* Switch lead wire (blue) for
connecting to brush holder
* Field lead wire (white)
for connecting to insulated
terminal
Fix Lead wire (black)
connecting field terminals
A and B, with lead holder.
Fix the following lead wires
with this lead holder.
* Grounding lead wire
(transparent) for connecting
to field core
* Field lead wire (white)
for connecting to insulated
terminal
Fix field lead wire (black)
for connecting to switch,
with lead holder.
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to insulated terminal
* Choke coil lead wire (orange) for
connecting to insulated terminal
LED circuit
LED
Fix the lead wires (white) of
LED circuit, with lead holder.
See Fig. A.
Fig. A Fig. B
* Lead wires of power supply cord
* Grounding lead wire (transparent)
for connecting to field core
Lead wire (blue ) of LED
circuit
Fig. C
LED circuit
Noise suppressor
Bottom view
(View from cord guard side)

Wiring diagram P 15 / 17
Brush holder Brush holder
Switch
HP2050 and HP2051 (without flash light)
For Europe, High voltage area
* Choke coil
* Noise suppressor * Insulated terminal
Noise suppressor
The electrical parts marked with * have to be
set in the illustrated position.
Fix with lead holder
the lead wires passed
through this portion
Fix with lead holder
the lead wires passed
through this portion
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to brush holder
* Lead wire (black) connecting
field terminals A and B
Fix the following lead wires
with this lead holder.
* Switch lead wire (blue) for
connecting to brush holder
* Field lead wire (white)
for connecting to insulated
terminal
Fix Lead wire (black)
connecting field terminals
A and B, with lead holder.
Fix the following lead wires
with this lead holder.
* Grounding lead wire
(transparent) for connecting
to field core
* Field lead wire (white)
for connecting to insulated
terminal
Fix field lead wire (black)
for connecting to switch,
with lead holder.
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to insulated terminal
* Choke coil lead wire (orange) for
connecting to insulated terminal

Wiring diagram P 16 / 17
Brush holder Brush holder
HP2050 and HP2051 (without flash light)
For Great Britain, low voltage
Noise suppressor
Switch
Fix with lead holder
the lead wires passed
through this portion
Fix with lead holder
the lead wires passed
through this portion
Fix Lead wire (black)
connecting field terminals
A and B, with lead holder.
Fix the following lead wires
with this lead holder.
* Switch lead wire (blue) for
connecting to brush holder
* Field lead wire (white)
for connecting to switch
Fix field lead wire (black)
for connecting to switch,
with lead holder.
Set choke coil in
the position
illustrated.
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to brush holder
* Lead wire (black) connecting
field terminals A and B
Choke coil Fix choke coil lead wire (orange)
with lead holders.
Fix grounding lead wire
(transparent) for connecting
to field core, with lead holder.

Wiring diagram P 17 / 17
HP2050 and HP2051 (without flash light)
For other countries
Fix field lead wire (black)
for connecting to switch,
with lead holder.
Brush holder Brush holder
Fix the following lead wires
with this lead holder.
* Switch lead wire (red) for
connecting to brush holder
* Lead wire (black) connecting
field terminals A and B
Fix the following lead wires
with this lead holder.
* Switch lead wire (blue) for
connecting to brush holder
* Field lead wire (white)
for connecting to switch
Fix Lead wire (black)
connecting field terminals
A and B, with lead holder.
Switch
Noise suppressor
Fix with lead holder
the lead wires passed
through this portion
Noise suppressor is not
used in some countries.
Fix with lead holder
the lead wires passed
through this portion