Bosch GOL Professional 20 D Original Instructions Manual page 9

Intended Use
The measuring tool is intended for establishing and checking
exactly horizontal height profiles. It is also suitable for meas-
uring heights, distances and angles.
Product Features
The numbering of the product features shown refers to the il-
lustration of the measuring tool on the graphic page.
(1) Lens
(2) Rough sight
(3) Bubble vial mirror
(4) Eyepiece cover
(5) Adjusting screw for sighting line
(6) Eyepiece
(7) Circular bubble vial
Technical Data
Optical level GOL 20 D
Article number 3 601 K68 400 3 601 K68 401 3 601 K68 000 3 601 K68 001 3 601 K68 500 3 601 K68 501
Working range 60 m
Height accuracy 3 mm/30 m
for single meas-
urement
Deviation for 2.5 mm
1 km double lev-
elling
Accuracy of the 8´/2 mm
bubble vial
Compensator
– Levelling ±15´
range
– Magnet
dampening
Telescope
– Image upright
– Magnification 20 x
– Field of view 1°30´
– Lens dia- 36 mm
meter
– Minimum 0.3 m
measuring
distance
– Multiplication 100
factor
– Addition con-
stant
Horizontal circle
graduation
Tripod mount 5/8"
Bosch Power Tools
GOL 20 G GOL 26 D
60 m 100 m
3 mm/30 m 1.6 mm/30 m
2.5 mm 1.5 mm
8´/2 mm 8´/2 mm
±15´ ±15´
● ●
upright upright
20 x
1°30´ 1°30´
36 mm 36 mm
0.3 m 0.3 m
100
0 0
1° 1 gon
5/8"
(8) Compensator locking button
(9) Horizontal circle reference mark
(10) Horizontal circle
(11) Adjusting screw for circular bubble vial
(12) Levelling screw
(13) 5/8" tripod mount (on the underside)
(14) Horizontal drive screw
(15) Serial number
(16) Focusing knob
(17) Hex key
(18) Adjusting pin
(19) Case
(20) Plumb-bob
Accessories shown or described are not included with the
product as standard. You can find the complete selection of ac-
cessories in our accessories range.
GOL 26 G GOL 32 D
100 m
1.6 mm/30 m 1 mm/30 m
1.5 mm 1.0 mm
8´/2 mm 8´/2 mm
±15´
● ●
upright
26 x 26 x
1°30´
36 mm
0.3 m
100 100
0 0
1° 1 gon
5/8" 5/8"
English | 9
GOL 32 G
120 m 120 m
1 mm/30 m
1.0 mm
8´/2 mm
±15´ ±15´
● ●
upright upright
32 x 32 x
1°30´ 1°30´
36 mm 36 mm
0.3 m 0.3 m
100 100
0 0
1° 1 gon
5/8" 5/8"
1 609 92A 8V7 | (05.07.2023)