820 Каталог GUHRING 2016 Режущий инструмент для обработки наружной и внутренней резьбы Стр.808

Каталог GUHRING 2016 Режущий инструмент для резьбы Стр. 808 0820 Lab2u

Technical section CLAMPING CHUCKS FOR THEAD MILLING Selecting the correct clamping chuck Correct tool clamping also plays a essential role with thread milling. Thread milling cutters should as a rule be clamped as short as possible. A compact and mechanical clamping force is preferable. The error in concentricity should not exceed 0.02 millimetres. Power chucks max. permissible error in concentricity: 0.003 mm Side lock holders max. permissible error in concentricity: 0.002 mm Shrink fit chucks max. permissible error in concentricity: 0.005 mm Hydraulic chucks A power chuck excels thanks to extremely accurate concentricity. The high clamping forces and optimal smooth running are a perfect prerequisite for the production of threads in all materials including a high pitch. A side lock holder for HB and HE shanks is a robust, cost-efficient clamping chuck with a maximum clamping force. The clamping surface prevents the tool twisting or being pulled out during machining. Therefore, side lock holders are suitable for the production in all materials including a high pitch. A shrink fit chuck creates a rigid connection with the shrink fitted tool. Incorrect shrink fitting or older shrink fit chucks can result in the pulling out of the tool. Tool breakage and possible loss of the component would be the consequence. Therefore, the shrink fit chuck is only suitable for a thread pitch < P=1.5 mm. A hydraulic chuck, similar to the shrink fit chuck, has only limited suitability for thread milling. Especially with high radial forces this clamping chuck reaches its limits. Therefore, the hydraulic chuck is recommended for softer materials such as aluminium and a thread pitch < P=1.5 mm. max. permissible error in concentricity: 0.005 mm Collet holders Collet chucks are very well suited for micro-thread milling because only axial stresses are created. The low clamping forces omly permit the milling of softer materials. Consequently, collet holders are not suitable for conventional thread milling. max. permissible error in concentricity: 0.01 mm 808 GUHRING