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GTi- SYSTEM Indexable Insert Threading

DC18 GTi-SYSTEMI ndexable Insert ThreadingHelix angle calculationPositive AnvilsNegative AnvilsInsert sizeTool typeThread Helix AngleThread Helix AngleSTANDARD0 - 1 1 -2 2 -3 3 -4 4 -5 0 -1 1 -2 163/8 EX RH/ IN LH AE16+ AE16AE16+ AE16+ AE16+ RH / EX LH AI16+ + AI16+ AI16+ EX RH / IN LH AE22+ AE22AE22+ AE22+ AE22+ RH / EX LH AI22+ + AI22+ A122+ UEX RH / IN LH AE22U+ AE22U AE22U+ AE22U+ AE22U+ RH / EX LH AI22U+ AI22 UAI22U+ AI22U+ A122U+ EX RH / IN LH AE27+ AE27AE27+ AE27+ AE27+ RH / EX LH AI27+ + AI27+ AI27+ UEX RH / IN LH AE27U+ AE27AE27U+ AE27U+ AE27U+ RH / EX LH AI27U+ AI27AI27U+ AI27U+ AI27U+ calculate helix angle for a given threadTan = Lead x D(for single start threads, lead equals pitch)(for multi-start threads, lead equals pitch x no of starts)Although effective thread diameter is the preferred diameter to use inhelix calculations, the actual thread diameter is generally used as it is easier to obtain and gives a close approximationPremier toolholder pockets are manufactured with a helix angle, and on toolholders that utilise an anvil, this helix angle can bechanged to suit the thread by changing the anvil accordingly.

DC18 GTi-™SYSTEM Indexable Insert Threading Helix angle calculation Positive Anvils Negative Anvils Insert size Tool type Thread Helix Angle Thread Helix Angle STANDARD 0º - …

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Transcription of GTi- SYSTEM Indexable Insert Threading

1 DC18 GTi-SYSTEMI ndexable Insert ThreadingHelix angle calculationPositive AnvilsNegative AnvilsInsert sizeTool typeThread Helix AngleThread Helix AngleSTANDARD0 - 1 1 -2 2 -3 3 -4 4 -5 0 -1 1 -2 163/8 EX RH/ IN LH AE16+ AE16AE16+ AE16+ AE16+ RH / EX LH AI16+ + AI16+ AI16+ EX RH / IN LH AE22+ AE22AE22+ AE22+ AE22+ RH / EX LH AI22+ + AI22+ A122+ UEX RH / IN LH AE22U+ AE22U AE22U+ AE22U+ AE22U+ RH / EX LH AI22U+ AI22 UAI22U+ AI22U+ A122U+ EX RH / IN LH AE27+ AE27AE27+ AE27+ AE27+ RH / EX LH AI27+ + AI27+ AI27+ UEX RH / IN LH AE27U+ AE27AE27U+ AE27U+ AE27U+ RH / EX LH AI27U+ AI27AI27U+ AI27U+ AI27U+ calculate helix angle for a given threadTan = Lead x D(for single start threads, lead equals pitch)(for multi-start threads, lead equals pitch x no of starts)Although effective thread diameter is the preferred diameter to use inhelix calculations, the actual thread diameter is generally used as it is easier to obtain and gives a close approximationPremier toolholder pockets are manufactured with a helix angle, and on toolholders that utilise an anvil, this helix angle can bechanged to suit the thread by changing the anvil accordingly.

2 The following table gives details of the positive anvils required to alter thehelix angle of the thread. Negative anvils are only used to alter the helix angle of right hand tools when machining left hand threads,and left hand tools when machining right hand threads.

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