Hilti FX 3-A Operating Instructions Manual page 21

5. Check that all connections are fully latched.
The hose of the hand tool must be filled with inert gas before work starts.
When you disconnect the hose package after use, fit the protective caps on to the connections
after disconnecting.
5.6 Preparing workpiece and connecting ground clamp 7,
WARNING
Risk of injury by dusts that are hazardous to health! Dust from surface coating and metal can be
hazardous to health.
▶ Depending on the type of coating to be removed, wear a dust mask or respiratory protection, as
necessary.
▶ Comply with the locally applicable regulations for occupational health and safety.
CAUTION
Risk of corrosion due to inadequate corrosion protection! Surfacing can expose the workpiece to
corrosion.
▶ Establish corrosion protection in accordance with your national and local requirements and in accordance
with jobsite specifications.
▶ Hilti offers a sealing washer in combination with the F­BT­MR SN stud. The prepared surface and the
stud are protected against corrosion by the sealing washer. Check usability in accordance with your
national and local requirements and in accordance with jobsite specifications. For more information
contact Hilti Service.
1. Use a center punch to mark the position where the stud is to be welded on.
▶ Comply with the minimum distances between studs and from edges.
2. Select the appropriate surfacing tool for working on the surface to be prepared.
Materials
FX 3­ST d14 surfacing tool for the following base metals:
- uncoated carbon steel
- weldable primer on steel, coat thickness up to 25 μm
FX 3­ST d20 surfacing tool for the following base metals:
- non-weldable primer on steel
- weldable primer on steel, coat thickness 25 μm and thicker
- galvanized steel
- duplex-coated steel
- multi-coated steel
Maximum coating thickness 1 mm
WARNING
Hazard due to inadequate surface preparation. If the surface was inadequately prepared, a subsequent
weld is substandard and the stud's load-bearing ability is reduced!
▶ Weld the stud within 2 hours after surface preparation.
▶ Before every welding operation, always check that the surface is correctly prepared.
3. Remove the coating with the surfacing tool. Apply firm contact pressure to the drill / driver.
Technical data
Contact pressure
Materials
Hilti SF 8M­A22 cordless screwdriver, 3rd gear, speed 1250 rpm, setting for drilling
*2302420*
2302420
8
≥ 20 kg
English 11