Air Chucks

Explanation on the models: (please read carefully to avoid confusion)

Example: Part Number or model 150-3-2.5 NBC

• It is a Ø150mm chuck
• The number 3 represents the number of jaws. This could be 2, 3, or 4 jaws, depends on the model.
• 2.5 is the chuck stroke. In this case 2.5mm on DIA.
• NBC - is the the model. 

There are two models per the explanation below;

BC Model – The chuck's piston has an inner movement back and forth together with the air feed tube (AFT). This is a safety feature that is required by CE, the European standard. It allows a slight delay after opening and closing of the jaws, before the machine starts its cycle. When the AFT moves forward, the jaws close/clamp the workpiece. Only then, the machine will receive a green light from the proximity sensor to start the cycle.

NBC Model – The Piston movement is internal only. In this model, coolant is available through the chuck body. The chuck is more stable hence rotate on higher rpm.

To summarize: if a BC model chuck is required, 100mm with two jaws, the model number will be: 100-2-2.5 BC

                                               Mechanical parameters in mm

                                                Technical paraments

                                                *Calculated with top steel jaws H=16mm

                                                **Calculated with top steel jaws H=25mm

                                                ***Calculated with top steel jaws H=50mm

 200-4-2.5 BC model, 200mm or 8 inch, 4 jaw high precision air chuck

200-3-2.5 NBC model, 200mm or 8 inch, 3 jaw high precision air chuck

50-3-2 BC model, 50mm or 2 inch, 3 jaw high precision turning air chuck

 64-3-2 BC model, 64mm or 2.5", 3 jaw high precision turning air chuck

The above photo shows the machine back side with the

air feed tube (AFT) mounted.

 PML-PAL precision air chuck is installed on a Mazak Ravema
at a customer site in Sweden.