Page 595 - Iscar

USER GUIDE

Troubleshooting

Problem Cause Solution
• Poor clamping • Check the clamping. Use hydraulic clamping
of the chuck chuck, maxin power chuck or a shrink system.
• Workpiece movement • Increase workpiece chucking force. SOLID CARBIDE DRILLS
• Check drill type and drilling depth, cooling
• Wrong drill
system and workpiece material.
• Check cooling lubricant. Increase coolant
• Insufficient coolant pressure. In the case of external coolant supply,
improve jet direction and add cooling jets.
• Unsuitable cutting • Reduce feed.
conditions
• Worn out drill center • Regrind cutting edge.
point (chisel)

• Insufficient chip
evacuation • Use pecking cycle.

Drill breakage
• Poor clamping • Check the clamping and adaptation. Use hydraulic
of the chuck clamping chuck, maxin power chuck or a shrink system.
• Workpiece movement • Increase workpiece chucking force.
• Check drill type and drilling depth, cooling system
• Wrong drill
and workpiece material. Possibly use longer drill.
• Check cooling lubricant. Increase coolant
• Insufficient coolant pressure. In the case of external coolant supply,
improve jet direction and add cooling jets.
• Unsuitable cutting • Check cutting parameters, and possibly reduce feed.
conditions
• Worn out or broken • Replace drill or regrind cutting edge.
Chipping on the cutting corners cutting corner
Problem Cause Solution
• Unsuitable cutting • Reduce feed by 30-50% during exit.
conditions

• Worn out drill • Replace drill.

Burrs on exit
• Unsuitable cutting
Ra conditions • Adjust feed to improve chip flow.
• Make sure that the drill’s runout is
• Large runout
within 0.02 mm (radial & axial).
• Chip jamming • Reduce cutting speed.
• Increase coolant pressure.
Rough surface finish • Apply pecking procedure.
• Make sure that the drill runout is within
• Large runout
0.02 mm (radial & axial).
• Poor stability • Check and improve drill and workpiece clamping rigidity.
• When drilling hard materials or sloped surfaces,
• Rough application
reduce feed by 30-50% during entrance.
Deviation of hole position • Use a short pilot drill with 140° point angle.

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