four grooves on the spiral
The aluminum extrusion will not pull out
BE100072 - Clamping force up to 6
Due to the specially designed pitch
1616030 - Twofold ground main cutting edges and circumferential cutters
FAMAG 50mm Carbide Tipped TCT Cylinder Boring Forstner Bit, Long Version OAL140mm, 1661050(DISCONTINUED) Inhex Sockets four grooves on the spiralFAMAG 50mm Carbide Tipped TCT Cylinder Boring Forstner Bit, Long Version OAL140mm, 1661050 Long version, carbide tipped with centre point, two main cutting edges, two taper taps. Precisely ground by diamond wheel in CNC machines. High quality carbide tipping and special curved grinding (> 23 mm) on the main cutting edges. Tear free, accurate drillings in all hard wood materials, laminated and plastic laminated chipboards, as well as many plastics,