FlexiROC T35 R/T40 R 8 Drilling
110 No: 3171473547.1 en
8.7.3 Difficulties in loosening the coupling sleeve
The best method of loosening the coupling sleeve is to "drill" the last few centimetres
without feed pressure and rotation, leaving percussion active for a few seconds to break
loose the coupling sleeve.
n Make sure the RPC-F system is set correctly. An RPC-F system that is set too high
causes excessive torque in the coupling sleeve.
8.7.4 Hole deflection
1.
Try to drill with as low a drill feed pressure as possible.
2.
Check the condition of the drill bit.
3.
Use TAC pipes, drop centre bits.
4.
Only use flushing air and rotation during overload.
5.
Drill the first drill steel with reduced drilling for at least half of the drill steel in order to
minimise hole deflection at the start of the hole.
To Next Page
Loading...
