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T ECHNICAL INFORMATION
Models No. SG1250 L-1
PRODUCT
P 1 / 11
Description Wall chaser 125mm (5")
CONCEPT AND MAIN APPLICATIONS
Are you still employing chisel, when you groove for H-1
plumbing in the wall? Chisel is a past method!
H-2
Grooving with model SG1250 is the new style of plumbing.
Its features and benefits are as follows.
* Electronic for soft start, constant rotational speed
* SJS (Super Joint System) for avoiding the shock L-2
by accidental wheel jam. W
Dimensions : mm ( " )
* Precise grooving work with coaxial 2 diamond wheels
Length ( L-1 ) 376 (14-3/4)
Length ( L-2 ) 346 (13-5/8)
Width ( W ) 151 (5-15/16)
Height (H-1 ) 284 (11-1/8)
Height (H-2 ) 178 ( 7 )
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output(W)
Input Output
110 13.0 50 / 60 1,400 840 1,800
120 12.0 50 / 60 1,400 840 1,800
220 6.7 50 / 60 1,400 840 2,100
230 6.4 50 / 60 1,400 840 2,100
240 6.1 50 / 60 1,400 840 2,100
No load speed : min-1= rpm. 9,000 ( for Europe : 10,000 )
125 (5)
Blade size Diameter : mm (")
Arbor : mm (") 22.23 (7/8)
Cutting depth : mm (") 0 - 30 (0 - 1-3/16)
6(1/4) - 30(1-3/16)
Adjustment of
cutting width : mm (") Adjustable in 9 stage
by inserting the spacers
Standard equipment
* Diamond wheel 125 ......................... 2 pcs.
* Plastic carrying case ......................... 1 pc.
* Wrench 35 .......................................... 1 pc.
* Hex wrench 6 .................................... 1 pc.
< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* Various diamond wheel cutter 125mm
* Spacer 3mm for adjustment of cutting width
* Spacer 6mm for adjustment of cutting width
P 2 / 11
Features and benefits SG1250
Electronic features for
* Soft start for suppressing shock at start Comfortable gripping by
* Auto cut-off when overloading ergonomically designed handle
* Speed control
Connectable with
SJS (Super Joint System)
vacuum cleaner for
provides the following benefits. dustless work
* Smooth and comfortable
cutting work
Aluminum blade case,
* Suppression of shock by reaction
structured for easy replacement
at starting
of wheels, and easy adjusting
* Protection of the mechanical section
of cutting depth.
from the shock by accidental wheel jam
Adjustable groove width in 9 stage Conveniently located front
by inserting spacers cover efficiently prevents the
of 3mm(1/8") and 6mm(1/4") in Groove width dust from spreading, in every
Q'ty of Q'ty of cutting depth.
thickness. inc. wheel
6mm flange 3mm flange
Diamond thickness
Outer
wheels flange 6mm 1 pc.
9mm 1 pc.
Inner
flange 12mm 1 pc. 1 pc.
15mm 2 pcs.
18mm 2 pcs. 1 pc.
21mm 3 pcs.
24mm 3 pcs. 1 pc.
Spacer Spacer 27mm 4 pc.
of 6mm of 3mm 4 pc. 1 pc.
30mm
Comparison of products
Model No. MAKITA Competitor A Competitor B MAKITA
Specifications SG1250 Model A Model B SG150
Power input : W 1,400 1,400 1,500 1,800
Rated amperage in USA : A 12 12 N/A N/A
No load 9,000
speed : min-1= rpm. 10,000 (Europe) 8,200 9,500 5,100
Blade diameter : mm (") 125 (5) 125 (5) 125 (5) 150 (6)
Cutting depth : mm 0 - 30 0 - 30 8 - 30 7 - 45
(") (0 - 1-3/16) (0 - 1-3/16) (5/16 - 1-3/16) (9/32 - 1-3/4)
Possible adjustment of 6(1/4) - 30(1-3/16) 10(3/8), 17(11/16) Stepless 7(9/32) -
cutting width : mm (") in 9 stage 23(7/8), 30(1-3/16) 15 - 26 (9/16 - 1) 35(1-3/8)
Auto cut-off carbon brush Yes Yes Yes Yes
Overload protection Yes Yes Yes Yes
Electronic
Soft start Yes Yes Yes Yes
for
Speed control Yes Yes Yes Yes
Torque limiter Yes (SJS) Yes No No
Connection with vacuum cleaner Yes Yes Yes Yes
Double insulation Yes Yes Yes Yes
Vibration : m/s2 (instruction manual) less than 2.5 5 less than 2.5 (No data)
Sound power level : dB(A) 86 (No data)
(instruction manual) 92 86
Cord length : m (ft) 5.0 (16.4) 4.0 (13.1) 4.0 (13.1) 2.5 (8.2)
Length : mm ( " ) 346 (13-5/8) 344 (13-1/2) 358 (14-1/8) 416 (16-3/8)
Dimensions Width : mm ( " ) 151 (5-15/16) 164 (6-1/2) 267 (10-1/2) 172 (6-3/4)
Height : mm ( " ) 178 (7) 248 (9-3/4) 165 (6-1/2) 203 (8)
Net Catalogue 4.1 (9.0) 3.9 (8.6) 3.8 (8.4) 5.6 (12.3)
weight : Kg (lbs) Measured 4.13 (9.1) 4.13 (9.1) 4.14 (9.1)
Repair P 3 / 11
< 1 > Lubrication
Apply MAKITA grease SG. No.0 to the following portions designated by black triangle to protect
parts and product from unusual abrasion.
Position Amount : g
No. Parts item Portion to be lubricated (oz)
(65) Gear housing where spiral bevel gear 35 rotates 12 (0.42)
(65)
Spiral bevel
gear 35
Fig. 1
< 2 > Removing spiral bevel gear 9 and armature
( 1 ) Remove blade case section and handle L and R from the motor section as illustrated in Fig. 2 and Fig. 3.
Pan head
screw M5x40
Hex socket
head bolt M5x30
Blade case section
Fig. 2
Tapping screw 4x18 (5 pcs.) Handle R Handle L
Motor section
Fig. 3
Repair P 4 / 11
( 2 ) Remove gear housing from motor housing. See Fig. 4.
( 3 ) Separate rear cover by unscrewing tapping screw 4x18. And remove carbon brush. See Fig. 5.
( 4 ) Remove armature with gear housing cover. See Fig. 6.
( 5 ) Remove retaining S-6 and flat washer 6 from armature shaft. See Fig. 7.
( 6 ) Remove spiral bevel gear 9 together with flat washer 12 by employing bearing extractor.
Remove lock spring 12 by hand, and remove retaining ring S-12 with retaining ring plier. See Fig. 8.
( 7 ) Remove armature from gear housing cover with gear extractor. See Fig. 9.
Be careful, not to lose flat washer 12 in this step.
Tapping screw 4x18
Motor housing Rear cover
Carbon
brush
Gear housing
Carbon
brush
Fig. 5
Tapping screw 4x28
(4 pcs.) Fig. 4
Retaining ring S-6
Flat washer 6
Armature
Fig. 7
Gear housing
cover Fig. 6
No. 1R045 Gear extractor (large)
1R269 Bearing extractor Spiral bevel
Lock spring 12
gear 9
Flat Armature
washer 12
Gear housing
Retaining ring S-12 cover
Gripping spiral bevel gear 9 Flat washer 12
together with flat washer 12,
remove them from armature shaft.
Fig. 8 Fig. 9
Repair P 5 / 11
< 3 > Mounting spiral bevel gear 9 and armature
( 1 ) Mount ball bearing 6001LLB to gear housing cover. See Fig. 10.
( 2 ) Mount flat washer 12 to the armature shaft. See Fig. 11.
( 3 ) Mount the armature to gear housing cover with arbor press. See Fig. 12.
( 4 ) Mount retaining ring S-12, lock spring 12 and flat washer 12 to the armature shaft. See Fig. 13.
( 5 ) Mount spiral bevel gear 9 to the armature shaft . See Fig. 14.
( 6 ) Mount flat washer 6 to the armature shaft. And then, secure the parts with retaining ring 6. See Fig. 15.
< Note for replacing spiral bevel gear 9 >
The following parts have to be replaced as a set with the fresh ones.
* Spiral bevel gear 9
* Lock spring 12
* Retaining ring S-6
Ball bearing 6001LLB
Flat washer 12
Gear housing cover
Fig. 10 Fig. 11
Retaining ring S-12
*Lock spring 12
Flat washer 12
Armature
Fig. 13
Gear housing
cover
Strongly push spiral bevel gear
toward lock spring 12 side
by hand with glove, while turning
it clockwise.
*Spiral
1R217 Ring 22
Fig. 12 bevel gear 9
After mounting flat washer 6, secure the
parts mounted to the armature shaft,
with retaining ring 6.
Fig. 14
Flat washer 6
*Retaining ring 6
Fig. 15
Repair P 6 / 11
< 4 > Disassembling gear section
( 1 ) Unscrew 4 pcs. of hex socket head bolt M4x6. See Fig. 16.
( 2 ) Remove bearing box. See Fig. 17.
( 3 ) Remove spindle from helical gear 35 by pressing with arbor press. See Fig. 18.
( 4 ) Remove bearing retainer with No.1R316 "Adjustable Bearing Retainer Wrench". See Fig. 19.
( 5 ) Remove ball bearing 6201DDW. See Fig. 20.
Spindle
Spiral bevel
gear 35
Bearing box
1R217 Ring 22
Hex socket head
bolt M4x6 (4 pcs.) Hit the illustrated position.
Fig. 16 So, bearing box can be
removed, if it is difficult
to remove it by hand.
Spindle
Fig. 17
Labyrinth ring
Fig. 18
No.1R316
Adjustable bearing Ball bearing
retainer wrench 6201DDW
Bearing
retainer
When removing bearing retainer,
Hit bearing box with plastic
turn the adjustable bearing retainer
hammer for removing ball
wrench counter clockwise.
bearing 6201DDW.
Fig. 19 Fig. 20
Repair P 7 / 11
< 5 > Assembling gear section
( 1 ) Mount ball bearing 6201DDW to bearing box. See Fig. 21.
( 2 ) Secure the ball bearing 6201DDW by mounting bearing retainer. See Fig. 22.
( 3 ) Mount labyrinth ring to spindle . See Fig. 23.
( 4 ) Mount spindle with labyrinth ring and spiral bevel gear 35 to bearing box as illustrated in Fig. 24.
Ball bearing Bearing retainer No.1R316 Spindle
6201DDW
Adjustable bearing
retainer wrench
Labyrinth
ring
Bearing box
Bearing box When mounting bearing retainer,
turn the adjustable bearing retainer
Fig. 23
wrench clockwise.
Fig. 21 Fig. 22
Spindle
Bearing box
Spiral bevel gear 35
No.1R028
Bearing setting pipe
Fig. 24
Repair P 8 / 11
< 6 > Removing shoulder shaft and base
( 1 ) Remove retaining ring S-10 from shoulder shaft as illustrated in Fig. 25.
( 2 ) Remove shoulder shaft as illustrated in Fig. 26.
( 3 ) Now base can be removed from blade case as illustrated in Fig. 27.
Shoulder shaft
Retaining ring S-10
Fig. 25 Fig. 26
Make sure that torsion spring 11 has
been mounted to base, before mounting.
Wave washer 10
Base Base Fig. 27A
Thin washer 10
Fig. 27
< 7 > Mounting shoulder shaft and base
( 1 ) Take reverse step of the above illustrations, with paying attention to the following matters.
* Make sure that torsion spring 11 has been mounted to base. See Fig. 27A.
* Mount thin washers and wave washer as illustrated in Fig. 27.
Repair P 9 / 11
< 8 > Mounting handle
( 1 ) Secure handle L to blade case with pan head screw of M5 size. See Fig. 28.
The pan head screw of M5 size functions as a pilot screw for the step ( 3 ).
( 2 ) Mount motor section to the handle L. See Fig. 29.
( 3 ) Secure the motor section to the blade case with hex socket head bolt M5x30, while pressing the blade case
toward the boss of bearing box. See Fig. 30 and Fig. 30A. And remove pan head screw of M5 size.
( 4 ) Mount handle R and secure it with the following order.
1. Pan head screw M5x40
2. Tapping screw 4x18 (3 pcs.) of A group
3. Tapping screw 4x18 (2 pcs.) of B group
See Fig. 31.
Pan head screws
of M5 size
Pan head screws
of M5 size
Fig. 30
Fig. 28 Hex socket head
bolt M5x30
Fig. 29
Boss
Tapping screw 4x18
A group
Bearing box
Tapping screw 4x18 Blade case
B group
Pan head While pressing blade case toward the boss
screw M5x40 of bearing box, secure blade case to bearing
box with hex socket head bolt M5x30.
Fig. 31
Fig. 30A
Circuit diagram P 10 / 11
Color index of lead wires
Black
White Brush holder
Red (Switch block side)
Blue SB2
SB4
Switch block
SB3
Power supply SB1
cord
Controller
Brush holder
(Controller side)
Fig. 32
Wiring diagram
Switch block
< View from controller side >
Controller
Put the lead wires of controller in the lead holder
so that they are not slacken.
Speed
Control
Dial
Be careful not to loosen the lead wires of field in motor housing.
Put the loosened lead wires in the above place.
Fig. 33
Wiring diagram P 11 / 11
Switch block
< View from switch block side >
Controller
Put lead wires of power Do not loosen the lead
supply cord by strain relief wires of filed in motor
as illustrated in Fig. 34. housing.
Put the loosened ones in the
place as illustrated
in Fig.34.
Fix lead wires of controller
with lead holder.
Put the slack part of controler's lead wire
in the place as illustrated in Fig.34.
Fig. 34