Bacci Twin - 3.7.4 BCK: tool holding shaft (OPTIONAL)

Chap. 3
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CHAPTER 3 – Machine description and technical data
Whatever the head used, through the “Power Control” function, the NC slows down the speed of
the axes when the absorbed power exceeds 160% of rated power. All the (high-power)
electrospindles are driven by an electronic inverter, with rotating speed from 0 to 24.000 rpm, and
10 Hp power (18.000 rpm for higher power).
It is advisable to equip the machine with the second (optional) inverter, to speed up the passage
from one spindle to the next (from 6-7 sec to 1 sec).
The electrospindles are capable of both left-handed and right-handed rotation. La potenza
massima viene erogata già a 12.000 giri/minuto e viene mantenuta costante fino a 24.000
giri/minuto
Maximum diameter and maximum length of the tool, depending on configuration:
Please refer to the annexed data sheet.
Standard configuration:
• 4 ring nuts for ER32 or ER 40 grippers
• 4 ER32 or ER 40 grippers (2 x φ 20 mm, 1 x φ 16 mm, 1 x φ 10 mm)
3.7.4 BCK : tool holding shaft (OPTIONAL)
The high-rigidity and high-precision BCK shaft with taper shank is fitted onto the spindle without the
use of a clamp.
It is supplied complete with ring nut, counter ring nut and tightening wrench.
• ER 32 – M10 with φ 25 mm shaft, 55 mm or 85 mm long, M 10 thread at the head for tool
attachment, right or left rotation.
• ER 40 – M10 with φ 30 mm shaft, 55 mm or 85 mm long, M 10 thread at the head for tool
attachment, right or left rotation.
• ER 32 – ER 20 with φ 25 mm shaft, 55 mm or 85 mm long, ER 20 at the head for tool
attachment, right rotation.
• ER 40 – ER 25 with φ 30 mm shaft, 55 mm or 85 mm long, ER 25 at the head for tool
attachment, right rotation.