MADT Indexing Clamping System

MADT Indexing Clamping System

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.