805 Каталог GUHRING 2016 Режущий инструмент для обработки наружной и внутренней резьбы Стр.793

Каталог GUHRING 2016 Режущий инструмент для резьбы Стр. 793 0805 Lab2u

TROUBLESHOOTING Application problems with new taps Problem Possible causes Solution 1. Thread surface not according to requirements cutting edge geometry not suitable for the application cutting speed too high insufficient coolant (concentration and supply) chip congestion tapping size hole too small apply “correct” tap for the material to be machined reduce cutting speed optimise lubrication ensure suitable coolant and sufficient volume apply suitable tap type observe tapping size hole diameter specifications to DIN 336 or respective standards. Observe table for fluteless taps with tough, hard materials loading on tool too much or pitch too steep built-up edge cold welding apply hand tap sets apply coated tap improve coolant supply 2. Tool life insufficient 3. Tool breakage during advance or return surface hardening of tappinge size hole reasons listed under: “thread surface not according to requirements“ chip congestion tapping size hole too small teeth of chamfer lead overloaded tap hits bottom of tapping size hole lack of or incorrect chamfer of tapping size hole postional or angle error of tapping size hole tool hardness not suitable for the application cutting edge geometry not suitable for the application check drill (cutting edge) for wear heat or surface treatment following thread production reasons listed under: thread surface “not according to requirements“ apply correct tap observe tapping size hole dia. acc. to DIN 336 or respective standards longer chamfer lead (blind or through hole) increase no. of teeth of chamfer lead by increasing no. of flutes apply tap sets check hole depth apply tension/compression tap chuck correct chamfer angle of tapping size hole ensure correct tool clamping apply floating tap holder check core drill apply suitable tap for the individual application GUHRING 793 Technical section