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15.1) Regularly check for correct tightening (torque) of the fi xing screws of the drilling tools and
positioning templates.
15.2) Avoid pressure jolts on the advancing lever during drilling.
15.3) Always make sure that the drilling swarf is properly removed before starting to drill a new
hole.
15.4) Incomplete clamping of the drill on the rail to be drilled may lead to the breakage or accel-
erated wear of the drilling tool and damage to the spindle shaft bearings.
15.5) If it is necessary to operate the drill without the cutter inserted, remove the locking grub
screws from the spindle shaft.
15.6) Avoid leaving the SR5000 tank under pressure and exposed to sunlight for long periods of
time.
15.7) Should the DBG-Y clamping device be removed, make sure that by reassembling it, the two
locking screws are fi rmly fastened.
16. RETURN TO Cembre FOR OVERHAUL
In the case of a breakdown contact our Area Agent who will advise you on the problem and give
you the necessary instructions on how to dispatch the tool to our nearest service Centre; if possible,
attach a copy of the Test Certifi cate supplied by Cembre together with the tool or fi ll in and attach
the form available in the "ASSISTANCE" section of the Cembre website.
APPENDIX "A"
Factors which infl uence the number of holes that can be made according to the tool used:
– Hardness of the material to be drilled.
– Thickness to be drilled.
– Stability of the drill clamping and correct assembly of the drilling tool.
– Suitable lubrocooling (lubrication/cooling) to keep the temperature of the tool low so as not
to compromise the effi ciency of the cutting edges, whilst at the same time facilitating the removal
of the swarf.
– Contact time of the cutting edges of the tool with the material to be drilled; bear in mind that
the faster the hole is made, the greater the effi ciency.
– Observance of these basic rules:
1) Commence drilling by exerting light pressure on the advancing lever, progressively inc-
reasing and then relaxing it when the tool is in the exit phase.
2) Avoid pressure surges and advance according to the diameter of the drilling diameter, to avoid
scratching the material or damaging the cutting edges of the tool.
3) Remember that a tool with effi cient cutting edges requires a lower application pressure than
one that has already made a certain number of holes.
4) When holes are made close to raised lettering on the rails, commence drilling with very
light pressure until the lettering disappears, to avoid possible breakage of the tool.
5) Bear in mind that when operating on very hard rails, as in the case of quality 1100 steel, it is
advisable to increase the lubrocoolant fl ow rate.
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15. WARNINGS
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