ECHNICAL INFORMATION

HP2050, HP2050F, HP2051, HP2051F L 2 Speed Hammer Drills 20mm

Models No. Description

PRODUCT P 1 / 17
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 W * Extra-low vibration level for comfortable and less fatigue operation * Model HP2050F and HP2051F are equipped Dimensions : mm ( " ) with built-in job light Model No. HP2050(F) HP2051(F) * HP2051 and HP2051F are equipped with Length ( L ) 372 (14-1/4) 360 (14-1/8) keyless drill chucks. Height ( H ) 220 (8-5/8) 70 (2-3/4) Width ( W ) Voltage (V) 240 Model No. No load speed : (min -1= rpm) Blows per min. : (min -1= bpm) Keyless chuck Chuck ability : mm ( " ) Concrete (High) (Low) Drilling capacity (High) Steel : mm ( " ) (Low) (High) Wood (Low) LED job light Reverse switch Protection from electric shock Cord length : m ( ft ) Net weight :Kg (lbs ) No Current (A) 6.9 6.6 3.4 3.3 3.2 (High) (Low) (High) (Low) No Cycle (Hz) 50 / / / / / 60 HP2050. Continuous Rating (W) Input Output HP2050F HP- 2,- 1,- 58,- 24,000 No Yes 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 No Yes Yes by double insulation 2.5 (8.2) 2.3 (5.1) HP2051F. Max. Output(W) 660 H

Specification

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
* 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)
* TCT. drill bit 5 - 19mm * Drill bit for metal 13mm * Drill bit for wood 40mm * Center drill bit for hole saw 16 - 90mm

Features

and benefits
Large lever has made it easy to change the working modes. Drill mode Hammer drill mode

P 2 / 17

Slim body designed for better maneuverability
Sturdy aluminum gear housing
In-line design handle for better work efficiency
Palm fitting soft grip 2-speed mechanical gear selection, High-Low Equipped with torque limiter for protection of user and mechanism from accidental lock of drill bit
Lever for F/R change Lock-ON button for continuous operation Cord guard is not only tough but also very flexible to protect cable from disconnection.
Variable speed control switch with big trigger and speed control dial
LED job light for lighting up at working point.

only HP2050F/ HP2051F

Comparison

Specifications

of products
Model No. MAKITA HP2050 (F) HP2051 (F) HP2032 HP- 2,- 2,- 1,- - 58,- 32,- 24,000 No 20 (3/4) (High) (Low) (High) (Low) 8 (5/16) 13 (1/2) 25 (1) 40 (1-9/16) Yes Yes (only F type) 6.By double insulation 372 (14-1/4) 360 (14-1/8) 370 (14-1/2) 368 (14-1/8) 75 (2-15/16) 195 (7-5/8) 2.5 (8.2) 2.5 (5.5) Yes 0 - 9,400 No Yes 20 (3/4) 8 (5/16) 13 (1/2) 25 (1) 40 (1-9/16) No No 7.Competitor A Model A-1 Model A-- 2,- 3,- 1,- 1,- 48,- 57,- 20,000 Yes 16 (5/8) 8 (5/16) 13 (1/2) 20 (3/4) 30 (1-3/16) Yes No 6.0 - 19,000 Yes 20 (3/4) 8 (5/16) 13 (1/2) 20 (3/4) 30 (1-3/16) Yes No 11.3 98
Power Input : W No load speed : (min -1= rpm) Blows per min. : (min -1= bpm) Drilling capacity Keyless chuck Concrete : mm ( " ) Steel : mm ( " )
(High) (Low) (High) (Low)
Wood : mm ( " ) Torque limiter LED job light Vibration in hammer drill mode (blowing direction) : m/s2 * Noise level in hammer drill mode : dB(A) Protection from electric shock Length : mm (") Width : mm (") Height : mm (") Cord length : m ( ft ) Net weight :Kg (lbs ) Dimensions
70 (2-3/4) 220 (8-5/8) 2.5 (8.2) 2.3 (5.1)
By double insulation (13-3/4) (13-5/8) (2-9/16) (2-13/16) (7-1/4) (7-1/2) 2.5 (8.2) 2.5 (8.2) 2.6 (5.8) 2.3 (5.1)
* measured by MAKITA under the loaded condition

of working rate

P 3 / 17
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 Mortar 150 N
* When hammer drilling with 8mm (5/16") bit
MAKITA HP2050(F)/HP2051(F)
* When hammer drilling with 12.5mm (1/2") bit

150 200

Competitor A Model A-1 Competitor A Model A-2
Competitor A Model A-1 Competitor A Model A-2 200

* When hammer drilling with 16mm (5/8") bit
* When hammer drilling with 19mm (3/4") bit
Testing conditions * Work piece : Douglas fir (Wood)
Douglas fir * Working mode : Drill / Low Speed * When hammer drilling with 36mm (1-7/16") bit
* Working mode : Drill / High Speed * When hammer drilling with : 24 mm (15/16") bit

Repair

P 4 / 17
< 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

Spindle
Gear housing Spur gear 29-37 Cam
Apply 25g of MAKITA grease N No.1 to the inner part of gear housing.

Change lever B 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. ( 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 Fig. 2 Loosening

( 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. Spur gear 29-37 Lock plate Gear housing cover

P 5 / 17

Change lever B

Rack 12 Fig. 3

Pin Change plate B
( 4) Assembling gear section 1. Assemble the spindle section to gear housing as illustrated Fig. 4 below. Oil seal 19 Gear housing Bearing retainer 20-36

Ring spring 11

Spindle section (including conical compression spring 15-2, cup washer 15, ball bearing 6202LLB and cam A) 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.

Fig. 4

2. Insert change plate B into rack 12 as illustrated Fig. 5 right. Rack 12 Change plate B Fig. 5 Spur gear 29-37 3. Set the above assembled one to spur gear 29-37 as illustrated Fig. 6 right.
Fig. 6 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 Leaf spring

Spur gear 29-37

Rack 12 with change plate B Fig. 7
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.

P 6 / 17 Spindle

Pin 4 Change lever B
5. Assemble lock plate to gear housing with setting its tail portion between ribs of gear housing.

Rack 12

Lock plate

Fig. 8

Fig. 8A 5. Assemble gear complete to the gear housing as illustrated in Fig. 9.

Gear complete Fig. 9

( 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.

P 7 / 17

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

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 1R292 Wrench for bearing retainer 1R030 Bearing setting pipe Oil seal 19 Bearing retainer 20-36 Fastening

Fig. 12

Fig. 13
( 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. Gear housing Ring spring 11

P 8 / 17

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
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

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.
Cam A Ball bearing 6202 LLB Cam A Ball bearing 6202 LLB 1R035 Bearing setting plate
1R029 Bearing setting pipe 1R030 Bearing setting pipe
Spindle Cup washer 15 Conical compression spring 15-24

Fig. 17

Circuit

diagram

P 10 / 17
HP2050F and HP2051F (equipped with flash light) For Europe, High voltage area
Color index of lead wires Black White Red Orange Blue Transparent
Insulated terminal Choke coil

Noise suppressor

Insulated terminal

Field A

Brush holder

Field B

Connected to field core

M1 M2 C2

LED circuit Noise suppressor

Power supply cord LED

P 11 / 17
HP2050 and HP2051 (without flash light) For Europe, High voltage area

Power supply cord

P 12 / 17
HP2050 and HP2051 (without flash light) For Great Britain, low voltage

Choke coil

P 13 / 17
HP2050 and HP2051 (without flash light) For other countries
Color index of lead wires Black White Red Orange Blue

Wiring

P 14 / 17
HP2050F and HP2051F (equipped with flash light) The electrical parts marked with * have to be For Europe, High voltage area
set in the illustrated position. 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

* Noise suppressor

* 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

* Choke coil

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 brush holder * Lead wire (black) connecting field terminals A and B
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 the lead wires passed through this portion, with lead holder

Switch

LED circuit
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 circuit Lead wire (blue ) of LED circuit Fig. C Bottom view (View from cord guard side) LED Fig. A Fig. B
The electrical parts marked with * have to be set in the illustrated position.

P 15 / 17

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
Fix with lead holder the lead wires passed through this portion Fix with lead holder the lead wires passed through this portion

P 16 / 17

HP2050 and HP2051 (without flash light) For Great Britain, low voltage Choke coil
Set choke coil in the position illustrated. 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
diagram HP2050 and HP2051 (without flash light) For other countries

P 17 / 17

Fix field lead wire (black) for connecting to switch, 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
Noise suppressor is not used in some countries.

Standard equipment

Rotary Hammer
Model HP2050, HP2050F Grip 36 complete Depth Gauge (Stopper pole) Drill chuck Chuck key Plastic carring case Part No. 152521-9 324219-0 192877-8 763432-9 824650-5 Model HP2051, HP2051F Grip 36 complete Depth Gauge (Stopper pole) Keyless drill chuck Plastic carring case Part No. 152521-9 324219-0 192664-5 824650-5
A worlds leading manufacturer of power tools
Double Insulation Built-in Job Light for Model HP2050F/ HP2051F

Variable Speed

Mechanical 2-Speed

Carrying Case

Reversing

Torque Limiter

Items of standard equipment may differ from country to country.

Optional accessories

Tungsten carbide-tipped bit Hole saw With high quality carbide tips brazed on to the
cutting edge, high speed drilling of plates up to 4 mm is possible and no coolant is required. Carbide tips are random-spaced to reduce chattering. (Keep rotation mode)

2 Speed Hammer Drills

20 mm (3/4") HP2050F/HP2051F HP2050/HP2051

(with LED job light)

Metal borer With high quality carbide tips brazed on to the cutting edge,
high speed drilling of plates up to 12 mm is possible and no coolant is required. Carbide tips are random-spaced to reduce chattering. (Keep rotation mode)
Bit diameter (mm) Overall langth (mm) 5.0 6.5 7.5 8.0 8.5 8.5 9.5 10.5 11.0 12.5 14.0 14.0 14.0 16.0 19.0 Blow-out bulb 220
Part No. 791027-8 791092-7 791028-6 711057-3 791008-2 711026-4 711058-1 711059-9 791009-0 711060-4 791029-4 711027-2 711028-0 791036-7 791037-5
Bit diameter (mm) Shank dia. (mm) 90 Center drill For hole saw 10 6
Part No. B-00898 B-00907 B-00913 B-00929 B-00935 B-00941 B-00957 B-00963 B-00979 B-00985 B-00991 B-01002 B-01018 B-01024 B-01030 B-01046 B-01052 B-01068 B-01074 B-01080 B-01096 B-01105 B-01111 B-01127 Bit diameter (mm) 14 14.Part No. B-02266 B-02272 B-02288 B-02294 B-02303 B-02319 B-02325 B-02331 B-02347 B-02353 B-02369 B-02375 B-02381 B-02397 B-02406 B-02412 B-02428 B-02434 B-02440 B-02456 B-02462 B-02478 B-02484
Slimmer and more compact hammer drills, yet loaded with torque limiter!
(For blowing chips and dust from drilled holes)
Part No. 765009-6 Type 43 drill stand
Shank assembly (For metal borer)
Application Steel, stainless steel, copper, aluminum, etc. Part No. JPA122190 FRP, resin, etc.
For hole saw bit diameter (mm) 60 90
Part No. B-01177 B-01183 B-01199 B-01208 Type Center drill type Center pin type Shank dia. 10 mm 13 mm Part No. B-02490 B-02509

PHOTO: Model HP2051F

Makita Corporation
3-11-8, Sumiyoshi-cho, Anjo, Aichi 446-8502, Japan
PRINTED IN JAPAN Z14314-2 2002-1
Extra-low vibration level for reduced operator fatigue!

Performance Data

Note: It may differ under some conditions.

Drilling speed

Work piece : Mortar When Hammer drilling with : 8 mm (5/16") bit.
2 Speed Hammer Drill 20 mm (3/4)
Makita HP2050/F, HP2051/F Competitor "M"

110 100

When Hammer drilling with : 12.5 mm (1/2") bit.
When Hammer drilling with : 19.0 mm (3/4") bit.

105 100

1. Aluminum gear housing 2. Torque limiter
When drill bit hits against reinforcements, Torque Limiter operates to stop the rotation of drill bit, ensuring safety in your work.
Work piece : Douglas fir (Wood) When drilling with : 24 mm (15/16") Auger bit.

120 100

100 120

High speed mode

3. Large lever has made it easy to change the working modes.
When drilling with : 36 mm (1-7/16") Auger bit.

125 100

Low speed mode

Rotation

6. Lever for Forward / Reverse change

Rotation + Percussion

Numbers in chart are relative values when setting competitor "M's" capacity as 100.
4. Palm fitting soft grip 5. Durable Cord Guard
The flexible and elastic rubber cord guard makes power supply cord more durable against disconnection than ever.
7. Variable speed with big trigger, and speed control dial

Specifications

Max. capacities Concrete (TCT. hammer bit) Steel High : Low : Wood High : Low : Continuous rating Input No load speed High : Low : Blows per minute High : Low : Overall length Net weight Power supply cord 20 mm (3/4) 8 mm (5/16) 13 mm (1/2) 25 mm (1) 40 mm (1-9/16) 720W 0 - 2,900 min-1 (rpm) 0 - 1,200 min-1 (rpm) 0 - 58,000 min-1 (bpm) 0 - 24,000 min-1 (bpm) 362 mm (14-1/4) 2.3 kg (5.1 lbs) 2.5 m (8.2 ft.)

Dimension

362 mm (14-1/4")
8. LED job light for excellent work efficiency in dimly-lit place.

220 mm (8-5/8")

9. Switch for mechanical 2 speed change
Built-in Keyless Job Light drill chuck HP2050 HP2050F HP2051 HP2051F No Yes No Yes No No Yes Yes

70 mm (2-3/4")

HP2050F, HP2051F only
Specifications may differ from country to country.