Indexing System
In order to obtain shaft revolution in MADT chucks it is necessary to stop chuck rotation.
The main parts of this device are:
- A = indexing shaft (driven by 2 lines of cylindrical pre-loaded rollers supported by an axial ball bearing).
- A1 = indexing notch.
- B = indexing shutter with spring.
- B1 = conical tooth.
- C = shutter stop lever.
The mechanism is in each jaw. The releasing lever allows for two shutters to be piloted at the same time.
Rotation and indexing (see diagram)
- phase 1 = indexed chuck: the shutter tooth is connected in the shaft notch.
- stop the rotation of the chuck.
- phase 2 = shutter release. (Releasing lever disconnects the shutter.)
- phase 3 = rotation: manual rotation works the piece in the jaws.
- phase 4 = indexing: lever release allows spring shutter connection.
The releasing lever device is designed to use the centrifugal force in rotation as indexing force.
Indexing precision 0°01′30".
Clamping System
The main parts of the blocking device are:
- driving hub with inclined plane A
- jaws B
- the chuck body C
- safety pin D.
(Chuck model MADT is automatically clamped.)
The driving hub A allows the opening and the clamping of the jaws through a draw rod connected to a hydraulic cylinder behind the lathe shaft.
[Max. power traction valves must be adhered to.]
Traction is applied to hub A due to the inclined plane:
- Jaw movement B
- clamping force increases
Safety device:
The safety pins D keep the jaws securely in the chuck body. These pins are the bottom plates of the indexing device.