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  • TECHKNOW

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    Thread Millilng Troubleshooting and Solutions

    THREAD MILLING


    Type of Wear
      • ×
        Flank Wear
        Flank Wear
        Cause
        • High cutting speed
        • Chip too thin
        • Insufficient coolant

        Remedy
        • Reduce cutting speed
        • Increase feed rate and reduce radial passes
        • Check coolant pressure / flow direction
      • ×
        Fracture/Chipping
        Fracture/Chipping
        Cause
        • Vibration
        • High load on cutting edge

        Remedy
        • Check stability
        • Reduce feed rate
        • Add radial passes
      • ×
        Build up Edge
        Build up Edge
        Cause
        • Cutting speed too low
        • Insufficient coolant

        Remedy
        • Increase cutting speed
        • Check coolant pressure / flow direction
      • ×
        Thread Surface-Chatter Marks/Vibrations
        Thread Surface-Chatter Marks/Vibrations
        Cause
        • Feed rate is too high
        • Large profile
        • Thread length too long

        Remedy
        • Reduce feed rate
        • Add passes
        • Add radial passes
        • Reduce overhang
      • ×
        Thread Accuracy (GO/NOGO Gauge)
        Thread Accuracy (GO/NOGO Gauge)
        Cause
        • Tool deflection
        • CNC program error

        Remedy
        • Reduce feed rate
        • Add radial passes
        • Use ZERO compensation
        • Check CNC program
      • ×
        Insert/Tool Breakage
        Insert/Tool Breakage
        Cause
        • High load on the cutting edge
        • Unproper cutting conditions
        • Chip evacuation
        • CNC program error

        Remedy
        • Add radial passes
        • Adjust cutting conditions
        • Add sufficient coolant
        • Check CNC program
      • ×
        Tapered Thread
        Tapered Thread
        Cause
        • Tool cutting load
        • Tool overhang

        Remedy
        • Add radial passes and/or reduce cutting conditions
        • Clamp tool to the minimum overhang length
      • ×
        Short Tool Life
        Short Tool Life
        Cause
        • Unsuitable cutting conditions
        • Vibrations

        Remedy
        • Reduce overhang as short as possible
        • Check tool and workpiece clamping
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