Name: NBB professional adapter, from M14 female thread to Hexagonal shank
Material of Main Body: Steel
One head with M14 male thread, Another head with Hexagonal shank, Middle with step part.
Size
Overall length: 40mm, diameter of widest part (step part) : 17mm, thickness of step part: 4mm, length of standard M14 male thread: 16mm, Diagonal distance of hexagonal shank (diameter): 10mm, length of hexagonal shank: 20mm.
It is used for connecting the diamond core drills with M14 female thread to drill machine.
1. Please follow the recommended RPM of the core drills to get the best performance.
2. Please use drill machine with enough power and RPM (cable drill machine is recommended) to get the better drilling effect.(faster speed and longer life).
3. Especially for the diamond core drills in big diameter, please make sure to use the powerful drill machine. ( less power make influence the performance of the diamond core drill.)
4. Make sure the diamond core drill is firmly connected with the adapter (no space between the step of adapter and the drill).
ATTENTION:
1. When you use the NBB VB diamond drill bit, NEVER apply the hammer mode.
2. Before making a new perforation, MAKE SURE that the bit is installed on the machine correctly, firmly without any vibration.
3. MAKE SURE the RPM of the machine is above 700RPM.
4. If the NBB VB diamond drill bit is used on a CORDLESS machine, MAKE SURE the battery of the drill machine is fully charged before drilling.
5. Please DO NOT attach horizontal force while you are drilling in vertical direction, otherwise the drill bit may be bended away and it will influence the performance!
All data are measured manually, so there will be a certain deviation. Please understand.