Family Designation: DDD-EF-FT
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Deep double tube drills with external 4-Start Thread Connection carrying the triangular inserts, feature 3 chip splitting cutting edges and a wiper for high hole surface quality and for high feed.
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![](https://www.iscar.com/eCatalog/Ecat/illust_ISOm/3791.svg)
Representative Image
![](https://www.iscar.com/ecatalog/Ecat/datafile/PICTURE/3791.gif)
Representative Image
Item Designation: DDD-EF 28.01-28.70-FT
DCN ![Cutting diameter minimum](./media/icons/icon_info.svg) | DCX ![Cutting diameter maximum](./media/icons/icon_info.svg) | PL | OAL | DCONMS | THOD ![Outer tube designation](./media/icons/icon_info.svg) | THID ![Inner tube designation](./media/icons/icon_info.svg) | ZEFF | NOF ![Number of flutes](./media/icons/icon_info.svg) | HAND | CSP ![0 - Without coolant supply, 1 - With coolant supply](./media/icons/icon_info.svg) | GICAT | GIREM | giic |
28.01 | 28.70 | 4.60 | 79.60 | 23.50 | TDO-I4 | TDI-N4 | 1~ | 1~ | R~ | 1~ | 4856859 | | 0 |
Items Per Package : 1