Page 421 - THREADING CATALOG

USER GUIDE

Troubleshooting
Problem Cause Solution
• check the clamping. use hydraulic clamping
• poor clamping of the chuck
chuck, maxin power chuck or a shrink system.
• unsuitable cutting conditions • decrease feed, increase coolant pressure. THREAD DRILLING
• chisel runout • check or replace the clamping adaptation.

• workpiece movement • increase workpiece chucking force.
chipping on the
chisel edge
• check the clamping. use hydraulic clamping
• poor clamping of the chuck
chuck, maxin power chuck or a shrink system.
• unsuitable cutting conditions • increase cutting speed, reduce feed rate.
• check cooling lubricant. increase coolant
• insufficient coolant pressure. in the case of external coolant supply,
improve jet direction and add cooling jets.

chipping on the cutting • rough application • reduce feed rate by 30-50% during entry and exiting.
edges / built-up edge
• check cooling lubricant. increase coolant
• insufficient coolant
pressure. in the case of external coolant supply,
improve jet direction and add coolant jets.
• check if the runout is within 0.02 mm
• large runout
t.i.r. (radial & axial)
• unsuitable cutting conditions • reduce cutting speed, increase feed.
• rough application • reduce feed rate by 30-50% during entry and exit.
excessive wear on • poor clamping of the chuck • check the clamping. use hydraulic clamping
the cutting corners chuck, maxin power chuck or a shrink system.
• workpiece movement • increase workpiece chucking force.
• check cooling lubricant. increase coolant
• insufficient coolant pressure. in the case of external coolant supply,
improve jet direction and add coolant jets.
• check drill type, drilling depth, cooling
• wrong drill
system and workpiece material.

• unsuitable cutting conditions • increase feed. when spot drilling, reduce feed.
chipping on the lands
• if hole size is too large, increase cutting
• unsuitable cutting conditions speed or reduce feed. if hole size is too small,
reduce cutting speed or increase feed.
• check the clamping. use hydraulic clamping
• poor clamping of the chuck
chuck, maxin power chuck or a shrink system.
• make sure that the drill’s runout is
• large runout
within 0.02 mm (radial & axial).
hole diameter out • worn out center point (chisel) • regrind cutting edge or replace the drill.
of tolerance
• insufficient chip evacuation • use pecking cycle.
• check the clamping. use hydraulic clamping
• poor clamping of the chuck
chuck, maxin power chuck or a shrink system.
• workpiece rigidity • increase workpiece chucking force.
• worn out drill center point (chisel) • regrind cutting edge.
• unsuitable cutting conditions • increase feed. when spot drilling, reduce feed.
hole not straight

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