Weka SR 25 Notice D'utilisation page 16

It is suitable for drilling into rock, concrete, asphalt and masonry. Through the addition of water through
the diamond drill bit (3) via the ball valve (1a) the drilled material is flushed away and the tool is cooled
(wet drilling). The drilling tool, the diamond drill bit (3), is a tube drill which is fitted with soldered-on or
welded-on segments impregnated with diamond splinters.
If necessary, the flushing water is extracted through a water collecting ring (4) by means of a suction unit.
The machine may not be used for a different purpose or with a different tool.
The SR25/38/65/68/75 is water protected and therefore corresponds to the water protection class IP 55.
The motor is water-cooled, i.e. the cooling and rinsing water flows through the cooling coil of the motor
before being leaded to the drill bit.
On proper use water can not enter the machine. Thus it is possible to drill upwards vertically (overhead
drilling) without any further precautions.
In the SR25/38/65/68/75 an undervoltage trip is integrated, i.e. after a break of the mains voltage the
machine doesn't start accidentally on return of the voltage.
The SR25/38/65/68/75 is fitted with a novel SR-motor (SR = switched reluctance). The commutation
(alternating currenting of the stator poles) is managed by a power electronic which gets its orders from
a microcomputer. The speed is over the whole capacity range almost constant, therefore the start drilling
is made easier.
The SR38/68/75 are fitted with a 3-speed gear box. Besides the three gear speeds, the motor can
additionally be operated in different speeds. Thus the different speeds according to the table below can
be selected.
The speeds of the SR25/65 are only changed via the motor, thereby six motor speeds can be chosen,
which can also be changed while drilling.
3.1 Specifications
Machine type
Nom inal voltage V
Nom inal current A
Nom inal power W
Output power W
Nom inal frequency Hz
Nom inal speeds 1/m in 230 - 570 300 - 740 180 - 1370 140 - 305 260 - 560 205 - 1370 60 - 300 80 - 435
Drill Ø in concrete m m
approx.
W eight kg
Protection class
Tool fixture
Operating data SR25
Speed 1/m in
Drill Ø concrete m m
W ater supply l/m in
Operating data SR25 S
Speed 1/m in
Drill Ø concrete m m
W ater supply l/m in
Operating data SR38 - Gear step 1
Motor step/Speed
Drill Ø concrete
W ater supply
Operating data SR38 - Gear step 2
Motor step/Speed
Drill Ø concrete
W ater supply
Operating data SR38 - Gear step 3
Motor step/Speed
Drill Ø concrete
W ater supply
SR25 SR25S SR38
230
16
3700
2700
50-60
70 - 370 65 - 300 50 - 400
14,7 14,7 16
Step 1 Step 2
230 280
200 - 370 170 - 310
1,4 -2,0 1,3 - 1,8
Step 1 Step 2
300 360
160 - 300 130 - 240
1,3 -1,9 1,1 - 1,6
1/m in 1/180
m m 400
l/m in 2,0
1/m in 1/360
m m 190
l/m in 1,4
1/m in 1/560
m m 120
l/m in 1,1
SR 65 SR65S
125 - 540 80 - 330 50 - 350
18,3 14,7
IP 55
1 1/4" UNC, M33/3
Step 3 Step 4
340 410
140 - 260 110 - 210
1,2 - 1,6 1,0 - 1,5
Step 3 Step 4
430 530
110 - 200 90 - 160
1,0 - 1,4 1,0 - 1,3
2/220 3/260
310 255
1,8 1,6
2/430 3/520
155 130
1,2 1,1
2/670 3/810
100 80
1,0 0,9
12
SR68 SR 75
400 3~
15
7500
5700
50-60
150 - 900 100 - 600
16 19,5
Step 5 Step 6
490 570
100 - 180 70 - 150
1,0 - 1,4 0,9 - 1,2
Step 5 Step 6
630 740
75 - 140 60 - 120
0,9 - 1,2 0,8 - 1,1
4/320 5/380
210 175
1,4 1,3
4/630 5/755
105 90
1,0 0,9
4/980 5/1180
70 55
0,8 0,7
SR75S
6/440
150
1,2
6/880
75
0,9
6/1370
40
0,6