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T ECHNICAL INFORMATION
Models No. HR2450FT, HR2450T
PRODUCT
P 1 / 24

Description 24mm (15/16") Rotary Hammer L

CONCEPTION AND MAIN APPLICATIONS
The above models are the advanced version of MAKITA's H
famous 3 -mode rotary hammer HR2450.
Each new model features : W
HR2450T : possible to quickly change from
the chuck for SDS-plus to keyless Dimensions : mm ( " )
drill chuck mutually without any tool Model No. HR2450FT HR2450T
HR2450FT : equipped with built in job light Length ( L ) 384 (15-1/8)
in addition to HR2450T's feature
Height ( H ) 212 (8-3/8) 204 (8)
Width ( W ) 72 (2-13/16)
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output(W)
Input Output
110 7.5 50 / 60 780 370 650
120 6.7 50 / 60 780 370 650
220 3.7 50 / 60 780 370 650
230 3.6 50 / 60 780 370 650
240 3.4 50 / 60 780 370 650
Model No. HR2450FT HR2450T
No load speed : (min -1= rpm) 0 - 1,100 0 - 1,100
Blows per min, :(bpm=min -1) 0 - 4,500 0 - 4,500
Single blow energy ( J ) 2.7 2.7
Variable switch Yes Yes
Reverse switch Yes Yes
Bit shank SDS plus type SDS plus type
Capacity

Concrete : mm (") * 24 (15/16 ) * 24 (15/16 ) * 25mm (1") for USA.
Steel. : mm (") 13 (1/2 ) 13 (1/2 )
Wood : mm (") 32 (1-1/4 ) 32 (1-1/4 )
Protection against electric shock double insulation double insulation
Built in job light Yes No
Cord length : m ( ft ) ** 4 (13.1) ** 4 (13.1) ** 2.5m (8.2 ft) for Asia
Net weight :Kg (lbs ) 2.6 (5.7) 2.6 (5.7) ** 2.0m (6.6 ft) for Australia

Standard equipment
* Stopper pole ........................ 1 pc. * Side grip ..................... 1 pc.
* Quick change drill chuck ..... 1 pc.
* Plastic carrying case ............ 1 pc.

< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* T.C.T hammer drill bits 5.5mm - 24mm * Core bits * Dust cups 5 and 9
(7/32" - 15/16") * Center bits * Safety goggle
* Bull point 14mm (9/16") * Core bit adaptor * Bit grease
* Cold chisel 20mm (13/16") * Rod * Blow out bulb
* Scaling chisels 38mm and 50mm * Core bits (dry type) * Dust extractor attachment
(1-1/2" and 2") * Taper shank adaptor * Hammer service kit
* Grooving chisels 8mm and 12mm * Taper shank T.C.T.hammer drill bits
(5/16" and 1/2") * SDS plus hammer chuck set
* Scraper assembly * SDS plus adapter
Features and benefits P 2 / 24
HR2450T, HR2450FT
Chuck can be changed quickly without any tools.
"Quick Change Chuck" for SDS-plus type bit
is one action slide type for quick change of bits.
Built-in torque limiter Palm fitting
soft grip

"Quick Change Drill Chuck"
Note : Use only with drill mode.

Practical positioning
chisel angle desired Change lever for 3 mode settings
40 positions Rotation
without using chisel +
adapter. Percussion
LED Job Light
for HR2450FT

Rotation
only Percussion
only

Comparison of products
Model MAKITA Competitor A
Specifications HR2450T HR2450FT HR2450 HR2450F Model A
Power input : W 780 780 780 620
No load speed : min-1=rpm. 0 - 1,100 0 - 1,100 0 - 1,100 0 - 870
Blows per min. : min-1=bpm. 0 - 4,500 0 - 4,500 0 - 4,500 0 - 4,850
Bit shank SDS-plus SDS-plus SDS-plus SDS-plus
Variable speed Yes Yes Yes Yes
Switch
Reverse Yes Yes Yes Yes
T.C.T. hammer bit : mm ( " ) * 24 (15/16 ) * 24 (15/16 ) * 24 (15/16 ) 24 (15/16 )
Concrete Core bit : mm ( " ) 54 (2-1/8 ) 54 (2-1/8 ) 54 (2-1/8 )
Capacity

Diamond core bit : mm ( " ) 65 (2-9/16 ) 65 (2-9/16 ) 65 (2-9/16 ) 68 (2-11/16 )
Steel : mm ( " ) 13 ( 1/2 ) 13 ( 1/2 ) 13 ( 1/2 ) 13 ( 1/2 )
Wood : mm ( " ) 32 (1-1/4 ) 32 (1-1/4 ) 32 (1-1/4 ) 30 (1-3/16 )
Catalogue 2.7 2.7 2.7 2.2
Single bow energy : J
Measured 2.7 2.7 2.7 1.9
Working mode 3 Modes 3 Modes 3 Modes 3 Modes
R : Rotation R R R R
R + P : Rotation+Percussion R+P R+P R+P R+P
P : Percussion P P P P
Angle settings for chisel etc. Yes Yes Yes Yes
LED Job light No Yes No Yes No
Double insulation Yes Yes Yes Yes
Cord length : m ( ft ) ** 4 (13.1) ** 4 (13.1) ** 4 (13.1) 4 (13.1)
Length : mm ( " ) 384 (15-1/8) 384 (15-1/8) 360 (14-1/8) 385 (15-1/8)
Dimensions Width : mm ( " ) 72 (2-13/16) 72 (2-13/16) 72 (2-13/16) 70 (2-3/4)
Height : mm ( " ) 204 (8) 212 (8-3/8) 204 (8) 212 (8-3/8) 205 (8-1/8)
Net weight : kg (lbs) 2.6 (5.7) 2.6 (5.7) 2.4 (5.3) 2.6 (5.7)
* 25mm (1") for USA.
** 2.5m (8.2) for Asia ** 2.0m (6.6) for Australia
P 3 / 24
Comparison of products
Numbers in chart below are relative values when setting BOSCH GBH2-24DFR 's capacity as 100.
80 N
Testing conditions
* Materials : Concrete with compressive Concrete with
strength, 350Kg/cm2 compressive strength
* Pressure loaded to the products : 80 N 350Kg/cm2
* Working mode : Rotation+Percussion

Comparison in hammer drilling

Bit diameter : 6.5mm
MAKITA HR2450FT/T 110

Competitor A Model A 100

Competitor B Model B 110

0 50 100 150
Bit diameter : 8.5mm

MAKITA HR2450FT/T 125

Competitor A Model A 100

Competitor B Model B 85

0 50 100 150
Bit diameter : 12.5mm

MAKITA HR2450FT/T 140

Competitor A Model A 100

Competitor B Model B 115

0 50 100 150
Bit diameter : 20.0mm

MAKITA HR2450FT/T 110

Competitor A Model A 100

Competitor B Model B 75

0 50 100 150

Comparison in chipping Testing conditions
* Materials : Concrete with compressive strength, 350Kg/cm2
* Working mode : Percussion only * Pressure loaded to the products : 80 N

MAKITA HR2450FT/T 105

Competitor A Model A 100

0 50 100 150
Repair P 4 / 24
< 1 > Lubrication to the bit holder section
Apply MAKITA grease to the following portions to protect parts and product from unusual abrasion.
* MAKITA grease RA No.1 to the portions designated with black triangle.
* MAKITA grease FA No. 2 to the portions designated with gray triangle.
* MAKITA hammer oil to the portions with white triangle.
Position MAKITA Amount : g
No. Parts item Portion to be lubricated grease (oz)
95 Cap 35 Inner lip of bit inserting side. 1.0 (0.04)
98 Stopper The inside where (103) tool holder contacts. MAKITA 1.0 (0.04)
99 Steel ball 7 Whole part grease RA No.1 1.0 (0.04)
104 Steel ball 6 Whole part 1.0 (0.04)
108 Steel ball 5.0 Whole part 1.0 (0.04)
MAKITA
103 Tool holder The inside where (21) tool holder guide contacts. 1.0 (0.04)
grease FA No.2
Quick change chuck assembly

108

95 96 97 98 100 101 102 99 104 103 105 106 107 109 110 111

Position MAKITA Amount : g
No. Parts item Portion to be lubricated grease (oz)
104 Steel ball 6 Whole part MAKITA 1.0 (0.04)
108 Steel ball 5.0 Whole part grease RA No.1 1.0 (0.04)
Quick change drill chuck assembly

108

104 105 106 107 109 110 111
Repair P 5 / 24
< 2 > Lubrication to the machine parts
Apply MAKITA grease to the following portions to protect parts and product from unusual abrasion.
* MAKITA grease RA No.1 to the portions designated with black triangle.
* MAKITA grease FA No. 2 to the portions designated with gray triangle.
* MAKITA hammer oil to the portions designated with white triangle.
* Disulphide molybdenum alloyed grease to the portions designated with arrow.

Position MAKITA Amount
No. Parts item Portion to be lubricated grease : g(oz)
12 Change lever Top of the pins 1.0 (0.04)
13 O ring 17 Whole portion 1.0 (0.04)
Inner portion for the mechanical parts 55 (1.91)
14 Gear housing
Groove for mounting (13) O ring 17 1.0 (0.04)
15 Needle bearing Inner ring 1.0 (0.04)
19 Spur gear 51 Inner portion where (21) tool holder guide contacts. 1.0 (0.04)
Inner portion where (32) piston cylinder contacts. 1.0 (0.04)
21 Tool holder guide MAKITA
The portion where (49) inner housing contacts. 1.0 (0.04)
grease RA No.1
23 X ring 9 Inner hole for reciprocating (24) impact bolt. 1.0 (0.04)
26 O ring 15 Whole portion 1.0 (0.04)
28 O ring 9 Whole portion 1.0 (0.04)
Accepting hole for (34) piston joint 1.0 (0.04)
32 Piston cylinder
Inner portion where (30) striker reciprocates. 1.0 (0.04)
Convex portion of cam 1.0 (0.04)

39 Clutch cam Disulfide molyb-
Whole of groove portion denum alloyed 0.5 (0.02)
grease
Accepting hole for (40) cam shaft 1.0 (0.04)
The surface where (42) helical gear 26 contacts. 1.0 (0.04)
41 Swash bearing 10 MAKITA
Convex portion of cam 1.0 (0.04)
grease FA No.2
The portion where balls are installed 4.0 (0.14)
42 Helical gear 26 Teeth portion

Whole portion MAKITA
48 O ring 68 1.0 (0.04)
hammer oil XLD
Teeth portion MAKITA 1.0 (0.04)
80 Spur gear 10
Accepting hole for (40) cam shaft grease RA No.1 1.0 (0.04)

13 15 19 21 22 23 93 24 25 26 27 28 29
14
30 32 34 48
12

80 39 40 49
41 42
Repair P 6 / 24
< 3 > Assembling quick change chuck
(1) Mount torsion spring 31 by inserting pin of torsion spring 31 into the hole of tool holder and mount 2 pcs. of
steel ball 6.0 to tool holder. See Fig. 1.

Torsion spring 31

Long pin of torsion spring 31

Tool holder

Short Pin of
torsion spring 31 Steel ball 6.0
Long Pin of
torsion spring 31
Coat the steel ball 6.0 with MAKITA grease N No.1,
before mounting.
Now the steel ball sticks on the hole of tool holder.
Fig. 1

(2) Mount change ring to the inside of change cover while aligning the hole of change ring with the hole of
change cover. See Fig. 2.

Change ring
Holes for pin of torsion spring 31

Change cover

Change ring
Change cover

Fig. 2

(3) Mount tool holder to change cover by passing the long pin of torsion spring 31 through the holes of change ring
and change cover. And turn the tool holder approx. by 75