Taper shank, spigots, and contact surfaces ground on collar.
All shanks hard turned (for smooth running!). Balancing quality G2.5 / 25,000 rpm. Form ADB.
With drive key for face mills with longitudinal slot, e.g. DIN 841.
With drive ring for face mills with crosswise slot DIN 1880 and cutter heads DIN 1830.
Drive key, face mill drive ring, and lock screw.
Pull studs (PS) No. 308760 − 308806. Special toggle spanner No. 309840.
Internal cooling available only with suitable tightening screw No. 309861.