Hilti DD 120 Mode D'emploi page 27

2 Description
2.1 Use of the product as directed
The DD 120 is an electrically-powered, rig-type diamond core drilling machine for drilling through-holes and blind
holes in (reinforced) mineral materials using diamond core bits and the wet drilling technique (hand-held use is not
permissible).
The machine must be adequately secured to the working surface with an anchor or vacuum base plate before use.
To avoid injury, use only genuine Hilti core bits and DD 120 accessories.
Observe the safety rules and operating instructions for the accessories used.
Observe the information printed in the operating instructions concerning operation, care and maintenance.
Observe the national health and safety requirements.
The machine, accessories and cutting tools may present hazards when handled incorrectly by untrained personnel or
when used not as directed.
Use of the water collection system in conjunction with a wet-type industrial vacuum cleaner is a mandatory requirement
for working overhead.
An additional means of securing the drill stand must be employed when the machine is secured with the vacuum base
plate (accessory) for horizontal drilling.
Do not strike the base plate with a hammer or other heavy object when making adjustments to it.
Tampering with or modification of the machine, drill stand and accessories is not permissible.
WARNING
The machine may be operated only when connected to an adequately-rated electric supply equipped with an
earth (ground) conductor.
WARNING
Drilling into materials hazardous to the health (e.g. asbestos) is not permissible.
DANGER
Use only the genuine Hilti accessories or ancillary equipment listed in the operating instructions. Use of
accessories or ancillary equipment not listed in the operating instructions may present a risk of personal injury.
2.2 Use of the system with various items of equipment
Equipment
With water collection system and wet-type in-
dustrial vacuum cleaner
Without water collection system and wet-type
industrial vacuum cleaner
With water collection system
* The machine's drilling diameter capacity can be found on the rating plate.
2.3 Gears and corresponding core bit diameters
Gear
1
2
* The machine's drilling diameter capacity can be found on the rating plate.
NOTE
Second gear may be used to achieve faster progress when drilling holes up to 82 mm (3¹/₂") in diameter in lightly
reinforced concrete.
All manuals and user guides at all-guides.com
Core bit diameters
16...132 mm (162*)
16...132 mm (162*)
16...132 mm (162*)
Core bit diameters
(mm)
57...132
16...52
Drilling direction
All directions
Not upwards
Not upwards
Core bit diameters No-load speed
(inches) (r.p.m.)
650
2¹⁄₄...5¹⁄₄
⁵⁄₈...2 1,380
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