Page 102 - Morse_catalog_2022

SOLID CARBIDE DRILLS User Guide

Troubleshooting

Problem Cause Solution

• Check the clamping. Use hydraulic clamping chuck,
• Poor clamping of the 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.
• Check cooling lubricant. Increase coolant pressure.
• Insufficient coolant In the case of external coolant supply, improve jet
direction and add cooling jets.
• Unsuitable cutting conditions • Reduce feed.
• Worn out drill center • Regrind cutting edge.
point (chisel)

• Insufficient chip evacuation • Use pecking cycle.

Drill breakage
• Check the clamping and adaptation. Use hydraulic clamping
• Poor clamping of the chuck
chuck, maxin power chuck or a shrink system.
• Workpiece movement • Increase workpiece chucking force.
• Check drill type and drilling depth, cooling system and
• Wrong drill
workpiece material. Possibly use longer drill.
• Check cooling lubricant. Increase coolant pressure.
• Insufficient coolant In the case of external coolant supply, improve jet
direction and add cooling jets.
• Unsuitable cutting conditions • Check cutting parameters, and possibly reduce feed.

• Worn out or broken • Replace drill or regrind cutting edge.
Chipping on the cutting cutting corner
corners

Problem Cause Solution
• Unsuitable cutting conditions • Reduce feed by 30-50% during exit.

• Worn out drill • Replace drill.

Burrs on exit
• Unsuitable cutting conditions • Adjust feed to improve chip flow.
Ra • Make sure that the drill’s runout is within 0.02 mm
• Large runout
(radial & axial).
• Chip jamming • Reduce cutting speed.
• Increase coolant pressure.

• Apply pecking procedure.
Rough surface finish
• Make sure that the drill runout is within 0.02 mm
• Large runout
(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.
• Use a short pilot drill with 140° point angle.
Deviation of hole position

102