Каталог Iscar высокоточные развертки и метчики 2022 - страница 64

TAPS USER GUIDE 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 holeoversizedTap jamming Improve lubrication and direction of coolantAdjust 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 Stripped threads Spindle speed and feed rate are not synchronized Check feed rate programming and/or pitch of leadingspindle. Use a tapping spindle with axial float (GTI/GTIN) Insufficient starting pressure exerted on tap (causes peeling) Increase starting pressure Bell mouthedtapped holeIncorrect starting pressure Use a tapping spindle with axial float (GTI/GTIN) Incorrect tap (cutting geometry unsuitablefor application) Select tap for the relevant material group 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 tooshort, therefore too few cutting teeth)Ensure that correct dimensions are maintained when regrinding 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 tooshort, therefore too few cutting teeth)Ensure that correct dimensions are maintained when regrinding Irregular workpiece material structure Adjust cutting speed. Improve lubricant quality of coolant Incorrect cutting speed Adjust cutting speed to suit workpiece material Excessivetap wearCoolant lacking in lubricating qualitiesand/or quantity Ensure the use of a suitable coolant and an ample supply.Check that the coolant is reaching the cutting zone Surface of the pre-hole is compacted Check pre-hole drilling conditions (drill carefully to reducerisk 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 Tap breakage Blunt tap regrind tap Tap has reached bottom of pre-hole Use tapping spindle with axial float andslipping clutch (GTI/GTIN) Pre-hole too small Check for correct pre-hole size, see pages 364-365 374 ISCAR