Taper Ball End Mill for High Accuracy Rib Slotting

New rib slotting method by contouring with taper end mill. Reduce the polishing time with direct milling. Features of EB4HR-ATH Reduces machining steps occurring at tool change Tapered peripheral edge shape reduces the machining steps occurring at tool change. Furthermore, when used from roughing, the cutting remain is reduced and high accuracy finishing is realized. Achieves high quality machined surface A good machined surface can be obtained with double flank shape and high-helix edge shape. Reduces the polishing time of the next process. Shows excellent performance for high hardness steels...

Reduces machining steps occurring at tool change Issue in general contour roughing Machining steps occurring at tool change Since deflection amount is different according to the tool neck length, the machining steps occur at tool change. Cutting by conventional tools Good machined surface Step remains Since the peripheral edge of EB4HR-ATH works repeatedly, easy to remove the steps. Since ball edge works at a point, steps can not be removed sufficiently. The peripheral cutting edge effectively removes the steps occurring at tool change. Achieve high quality machined surface Special peripheral...

■ Detail of neck shape Neck shape Straight neck Neck shape Taper neck 33 Neck shape Without neck

[Note] ©ap is shown as the criteria for Group 1 workpieces. For other groups, adjust the cutting depth according to the cutting depth factors in the above table. ©Adjust by setting ae to (3 to 5)*(ap)x(cutting depth ratio). When performing finishing processing, calculate the theoretical cusp height and set accordingly. Cutting depth setting example : When finishing in pre-hardened steel with EB4HR0100TN-10-05-ATH. Cutting depth = 0.032(ap)X0.8(Cutting depth factor for group 3 pre-hardened steel) = 0.0256mm ©Use the water or oil based coolant for the work material and machining shape. ©These Recommended...

Field data Comparison with conventional tools Cross rib slot Machine ：Vertical M/C Coolant ：Water base Work material ：NAK80（40HRC） L/D＝16 Incline angle 0.5° Depth 16mm Under neck length (mm) Contour roughing Contour roughing Contour roughing Contour finishing Length of rib slot one side 25mm Item code Feed rate Total machining time 136min. Comparison of machined surface Roughing and finishing by conventional tools Machining steps occurring at tool change Good machined surface One side half of rib slot (mm) 0.5 0 2 Roughing and finishing by conventional tools Measurement points of rib slot One...

Comparison between EDM and direct milling for rib slot (L/D=20mm) Cross rib slot Machine ：Vertical M/C Coolant ：Water base Work material ：NAK80（40HRC） L/D＝20 Incline angle 0.5° Depth 20mm Under neck length (mm) Item code Contour semi-finishing EB4HR0100TN-20-05-ATH Contour finishing EB4HR0100TN-20-05-ATH Length of rib slot one side 25mm Revolution Feed rate Cutting time Total machining time 458min. Comparison of machined surface by machining and EDM Total cutting time : About 7 hours 30 Preparation time of electrode about 4 hours Processing time of EDM about 9 hours Total time : About 13 After...

Coolant : Water base Work material : STAVAX (52HRC) L/D = 16 Model of rib slot Process Total machining time 406min.Condition of tool wear EB4HR0060TN-10-05-ATH Model of boss Process Total machining time 107min.^Condition of machined surface Surface' roughness _: Rz0.65[im Other form than rib slot can also be machined.

Trouble shooting In case machining steps that occurred at tool change remained after finishing Tool：Tool dia.φ1 × Under neck length 20mm 　　　EB4HR0100TN-20-05-ATH If the finishing pitch is large, the peripheral edge might not work sufficiently and the steps might not be removed. It is expected to improve by reducing the finishing pitch or do zero cutting Reducing the finishing pitch Remaining steps In case horizontal stripes remained at the bottom of rib slot after finishing Since the clearance between the bottom of the rib and the tool is small, the horizontal stripes might emerge depending on...

The diagrams and table data are examples of test results, and are not guaranteed values. "Epoch" and “ ” are registered trademarks of Mitsubishi Hitachi Tool Engineering, Ltd. in Japan. Attentions on Safety 1. Cautions regarding handling (1) When removing the tool from its case (packaging), be careful that the tool does not pop out or is dropped. Be particularly careful regarding contact with the tool flutes. (2) When handling tools with sharp cutting flutes, be careful not to touch the cutting flutes directly with your bare hands. 2. Cautions regarding mounting (1) Before use, check the outside...