Page 98 - Demo

96 ISCAR GENERAL PURPOSE DRILLINGSPADE-CHAMTroubleshootingCutting Edge Chipping1 Check the stability of the machine spindle, tool and workpiece clamping rigidity.2 Reduce feed rate, increase speed.3 If the drill vibrates, reduce cutting speed and increase feed rate.4 When drilling rough, hard or sloped surfaces (up to 7%u00b0), reduce the feed rate by 50%-70% during entrance and exit.5 Check cooling lubricant. increase coolant pressure. in case of external coolant supply, improve jet direction and add cooling jets.Chisel Area Chipping1 Reduce feed rate.2 Increase coolant pressure.3 Increase workpiece chucking force.Excessive Flank Wear1 Reduce cutting speed.2 Increase internal coolant pressure.Excessive Land Wear1 Check the runout and make sure it is within 0.03 mm T.I.R. (radial and axial).2 Reduce cutting speed.3 When drilling rough, hard or sloped surfaces (up to 7%u00b0), reduce the feed rate by 50%-70% during entrance and exit.4 Increase coolant pressure.5 Check the chisel point runout and make sure it is within 0.03 mm T.I.R.6 Increase workpiece chucking force stability and rigidity.Built-Up Edge1 Increase cutting speed/feed.2 Increase coolant pressure.