Taper shank, spigots, and contact surfaces ground on collar. All shanks hard turned (for smooth running!). With Balluffchip bore.
The double contact between the taper
and the flat flange creates a more stable and precise clamping situation:
- Better surface quality
- Longer tool life times
- Consistent seating in the headstock (even at high speeds)
- Smaller radial run-out
A BT double contact arbor can also be used in a standard BT machine spindle – and vice versa. The advantages of the double contact are however achieved only when a double contact arbor and double contact spindle are used together.
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.