T
ECHNICAL INFORMATION
Models No.
Description
HP2050, HP2050F, HP2051, HP2051F
2 Speed Hammer Drills 20mm
CONCEPT AND MAIN APPLICATIONS
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.
Specification
Model No.
Length ( L )
Height ( H )
Width ( W )
L
W
Dimensions : mm ( " )
HP2050(F) HP2051(F)
372 (14-1/4)
360 (14-1/8)
220 (8-5/8)
70 (2-3/4)
PRODUCT
P 1 /17
H
Voltage (V) Cycle (Hz)
110
120 720
220
230
240
Model No. HP2050.
No load speed
: (min -1= rpm)
Blows per min.
: (min -1= bpm)
Keyless chuck
Chuck ability : mm ( " )
Drilling capacity
: mm ( " )
LED job light
Reverse switch
Protection from electric shock
Cord length : m ( ft )
Net weight :Kg (lbs )
Current (A)
6.9
6.6
3.4
3.3
3.2
Concrete
Steel
Wood
50 / 60
50 / 60
50 / 60
50 / 60
50 / 60
(High)
(Low)
(High)
(Low)
(High)
(Low)
(High)
(Low)
(High)
(Low)
No
Continuous Rating (W)
Input Output
720
720
720
720
HP2050F HP2051 HP2051F.
0 - 2,900
0 - 1,200
0 - 58,000
0 - 24,000
No
1.5 - 13.0 (1/16 - 1/2)
20 (3/4)
20 (3/4)
8 (5/16)
13 (1/2)
25 (1)
40 (1-9/16)
Yes Yes
by double insulation
2.5 (8.2)
2.3 (5.1)
Yes YesNo
No
Yes
360
360
360
360
360
Max. Output(W)
660
660
660
660
660
Standard equipment
* 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.
< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* 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)
Repair
< 1 > Lubrication
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.
Gear housing
P 2 /17
Spindle
Cam
Apply 25g of MAKITA grease N No.1
to the inner part of gear housing.
Fig. 1
< 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.
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.
Gear housing
Spur gear 29-37
Change lever B
( 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.
No.1R298 Hex wrench
Fastening
No.1R139 Drill chuck extractor
No.1R223
Torque wrench
No.1R224
Ratchet head
Loosening
Fig. 2
Repair
( 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.
P 3 /17
Gear housing
Change lever B
( 4) Assembling gear section
1. Assemble the spindle section to gear housing as illustrated Fig. 4 below.
Bearing retainer 20-36
Spur gear 29-37
Lock plate
Rack 12
Fig. 3
Oil seal 19
Spindle section (including conical
compression spring 15-2, cup washer 15,
ball bearing 6202LLB and cam A)
Gear housing
Change plate B
Pin
Gear housing cover
Ring spring 11
Fig. 4
When assembling bearing retainer 20-36 and oil seal 19,
refer to "( 6) Assembling bearing retainer 20-36 and oil seal 19" at page 5.
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.
Gear housing
Rack 12
Leaf spring
Change plate B
Fig. 5
Spur gear 29-37
Fig. 6
Spur gear 29-37
Spindle
Rack 12 with change plate B
Fig. 7
Repair
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.
Spur gear 29-37
P 4 /17
Spindle
Pin 4
Change lever B
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.
Lock plate
Rack 12
Rib
Fig. 8
Fig. 8A
Gear complete
Fig. 9
Repair
( 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.
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.
1R292 Wrench for bearing retainer
Remodel by grinding this
portion to fit it on spindle
head.
No.1R292 Wrench
for bearing retainer
Fig. 10
P 5 /17
Loosening
Fig. 11
( 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. Assemble bearing retainer 20-36 with No.1R292 "wrench for bearing retainer" by turning it anti-clockwise.
See Fig. 13.
Arbor press
1R030 Bearing
setting pipe
Oil seal 19
1R292 Wrench
for bearing retainer
Bearing retainer 20-36
Fastening
Fig. 12
Fig. 13
Repair
( 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.
P 6 /17
Gear housing
Spindle section (including conical
compression spring 15-2, cup washer 15,
ball bearing 6202LLB and cam A)
Fig. 14
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.
Spindle
Cam A
Ball bearing
6202 LLB
1R232 Pipe 30
1R232 Pipe 30
Spindle
Ring spring 11
Cam A
Ball bearing 6202 LLB
Cup washer 15
Conical compression spring 15-24
Fig. 15
( 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.
Cup washer 15
Conical compression
spring 15-24
Fig. 16A
Fig. 16B
Repair
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.
P 7 /17
Spindle
Cup washer 15
Conical compression
spring 15-24
Cam A
Ball bearing
6202 LLB
1R035 Bearing
setting plate
Fig. 17
Cam A
Ball bearing
6202 LLB
1R029 Bearing
setting pipe
1R030 Bearing
setting pipe
Circuit diagram
HP2050F and HP2051F (equipped with flash light)
For Europe, High voltage area
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
P 8 /17
Field A
Field B
Insulated
terminal
Choke coil
Brush
holder
Insulated
terminal
Noise
suppressor
Field A
Brush
holder
Field B
Connected to
field core
2
Switch
4
M1
M2
C1
1
3
1
C2
2
LED
circuit
Noise
suppressor
Power supply cord
LED
Circuit diagram
HP2050F and HP2051F (equipped with flash light)
For other countries
Color index of lead wires
Black
White
Red
Orange
Blue
P 9 /17
Field A
Field B
Brush
holder
Field A
Brush
holder
Field B
2
Switch
4
M1
M2
C1
1
3
1
C2
2
LED
circuit
Power supply cord
LED
Circuit diagram
HP2050 and HP2051 (without flash light)
For Europe, High voltage area
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
P 10 /17
Field A
Field B
Insulated
terminal
Choke coil
Brush
holder
Insulated
terminal
Noise
suppressor
Field A
Brush
holder
Field B
Connected to
field core
2
Switch
4
M1
M2
C1
3
1
C2
21
Noise
suppressor
Power supply cord
Circuit diagram
HP2050 and HP2051 (without flash light)
For Great Britain, low voltage
Color index of lead wires
Black
White
Red
Orange
Blue
Transparent
Choke coil
P 11 /17
Field A
Field B
Brush
holder
Field A
Brush
holder
Field B
Connected to
field core
2
Switch
4
M1
M2
C1
3
1
C2
21
Power supply cord
Noise
suppressor
Circuit diagram
HP2050 and HP2051 (without flash light)
For other countries
Color index of lead wires
Black
White
Red
Orange
Blue
P 12 /17
Field A
Field B
Brush
holder
Field A
Brush
holder
Field B
2
Switch
4
M1
M2
C1
3
1
C2
21
Noise
suppressor
Power supply cord
Wiring diagram
HP2050F and HP2051F (equipped with flash light)
For Europe, High voltage area
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
* Choke coil
Fix field lead wire (black)
for connecting to switch,
with lead holder.
* Noise suppressor
P 13 /17
The electrical parts marked with * have to be
set in the illustrated position.
* Insulated terminal
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
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 lead wires passed
through this portion, with
lead holder
Noise suppressor
LED circuit
Switch
Brush holder
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 insulated
terminal
Fix with lead holder
the lead wires passed
through this portion
* Lead wires of power supply cord
* Grounding lead wire (transparent)
for connecting to field core
Noise suppressor
Fix the lead wires (white) of
LED circuit, with lead holder.
See Fig. A.
LED
Fig. A
LED circuit
Lead wire (blue) of LED
circuit
Bottom view
(View from cord guard side)
Fig. C
Fig. B
Wiring diagram
HP2050F and HP2051F (equipped with flash light)
For other countries
Fix field lead wire (black)
for connecting to switch,
with lead holders.
P 14 /17
Fix Lead wire (black)
connecting field terminals
with lead holders.
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 with lead holder
the lead wires passed
through this portion
Fix the lead wires (white) of
LED circuit, with lead holder.
See Fig. A.
LED circuit
Switch
Brush 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 with lead holder
the lead wires passed
through this portion
Lead wires from
power supply cord
Fig. A
LED
LED circuit
Lead wires (blue or red)
of LED circuit
Bottom view
(view from cord guard side)
Fig. C
Fig. B
Wiring diagram
HP2050 and HP2051 (without flash light)
For Europe, High voltage area
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
* Choke coil
Fix field lead wire (black)
for connecting to switch,
with lead holder.
* Noise suppressor
P 15 /17
The electrical parts marked with * have to be
set in the illustrated position.
* Insulated terminal
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
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 with lead holder
the lead wires passed
through this portion
Brush holder
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 insulated
terminal
Switch
Fix with lead holder
the lead wires passed
through this portion
Noise suppressor
Wiring diagram
HP2050 and HP2051 (without flash light)
For Great Britain, low voltage
P 16 /17
Choke coil
Set choke coil in
the position
illustrated.
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 choke coil lead wire (orange)
with lead holders.
Fix grounding lead wire
(transparent) for connecting
to field core, with lead holder.
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 with lead holder
the lead wires passed
through this portion
Noise suppressor
Switch
Fix with lead holder
the lead wires passed
through this portion
Wiring diagram
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
P 17 /17
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 with lead holder
the lead wires passed
through this portion
Noise suppressor
Noise suppressor is not
used in some countries.
Switch
Fix with lead holder
the lead wires passed
through this portion
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