Каталог Iscar высокоточные развертки и метчики 2022 - страница 64

USER GUIDE TAPS Troubleshooting Problem Cause Solution Incorrect tap (cutting geometry unsuitable for application) Use tap selected from the relevant material group Faulty alignment Ensure that the tap is correctly aligned with the core hole axis Tapped hole Improve lubrication and direction of coolant oversized Tap jamming Adjust cutting speed Incorrectly reground tap (lead tip is not concentric) Regrind tap Incorrect tap (cutting geometry incorrect for application) Use a tap from the relevant material group Check feed rate programming and/or pitch of leading Stripped threads Spindle speed and feed rate are not synchronized spindle. Use a tapping spindle with axial float (GTI/GTIN) Insufficient starting pressure exerted on tap (causes peeling) Increase starting pressure Bell mouthed Incorrect starting pressure Use a tapping spindle with axial float (GTI/GTIN) tapped hole Incorrect tap (cutting geometry unsuitable Select tap for the relevant material group for application) Unsatisfactory thread surface The tap is blunt Replace or regrind tap finish Tap badly re-ground Regrind tap. Check that cutting geometry is suitable for material Incorrect lubricant, concentration or quantity Ensure the use of a suitable coolant and an ample supply Swarf jamming Check cutting speed. Use alternative tap Tap has jammed against bottom of pre-hole Check hole and thread depths. Drill a deeper pre-hole Partial tap chipping Tap incorrectly reground (lead-in diameter too Ensure that correct dimensions are maintained when regrinding short, therefore too few cutting teeth) Irregular workpiece material structure Adjust cutting speed. Improve lubricant quality of coolant Swarf jamming Check cutting speed. Use alternative tap Tap has jammed against bottom of pre-hole Check hole and thread depths. Drill a deeper pre-hole Partial tap chipping Tap incorrectly reground (lead-in diameter too Ensure that correct dimensions are maintained when regrinding short, therefore too few cutting teeth) Irregular workpiece material structure Adjust cutting speed. Improve lubricant quality of coolant Incorrect cutting speed Adjust cutting speed to suit workpiece material Coolant lacking in lubricating qualities Ensure the use of a suitable coolant and an ample supply. Excessive and/or quantity Check that the coolant is reaching the cutting zone tap wear Check pre-hole drilling conditions (drill carefully to reduce Surface of the pre-hole is compacted risk of surface compacting). Check drill cutting edges Incorrect tap in use (cutting geometry unsuitable for application) Use tap from the relevant material group Centering error Ensure that axes of tap and pre-hole are aligned Blunt tap regrind tap Tap breakage Use tapping spindle with axial float and Tap has reached bottom of pre-hole slipping clutch (GTI/GTIN) Pre-hole too small Check for correct pre-hole size, see pages 364-365 374 ISCAR