Spindle nose

Removal of equipment is carried out by rotating each cam anticlockwise until the index lines coincide and then pulling the equipment away from the spindle nose. 

This type of chuck. Fig. 9.13, fits on the spindle nose and is convenient for bar and the smaller diameter workpieces. Having fewer moving parts than the moving-jaw types makes it more accurate. It is more compact and does not have the same overhang from the spindle nose, and work can be machined up to the front of the collet. All-round gripping of the component makes it ideal for holding tube and thin-walled work-pieces which tend to collapse in the three- or four-jaw chucks. 

In order to drive the workpiece, a work-driver plate must be mounted on the spindle nose and the drive is completed by attaching a work carrier to the workpiece. Fig. 9.19. 

Cutters which are mounted directly on the spindle nose are located on a centring arbor, and four tapped holes are provided to hold the cutter in position. The two keys again provide the means of transmitting the drive. 

To prevent deflection of the arbor during heavy cutting operations, it is sometimes necessary to mount a second arbor support nearer the spindle nose. The cutter is then positioned between the two supports. 

Large face mills are mounted directly on the spindle nose. To ensure correct location and concentricity, a centring arbor with the appropriate international taper is held in the spindle by the drawbar. The diameter on the end of the centring arbor locates the cutter, which is driven by the spindle keys through a key slot in the back face of the cutter. The cutter is held in position by four screws direct into the spindle nose. Fig. 11.12. 

Components having a number of diameters which are required to be concentric can be machined between centres. A centre is inserted in the spindle nose, using a reducing bush supplied for this purpose. This centre rotates with the spindle and workpiece and is referred to as a live centre. A centre inserted in the tailstock is fixed, does not rotate and is referred to as a dead centre. Great care must be taken to prevent overheating of... 

Fig. 10.11. The wheel spigot upon which the wheel is located has a taper bore to accurately locate on the spindle nose. The wheel flange locates on the wheel spigot and is held by three screws which, when tightened, securely hold the wheel between the two surfaces. On the outer...

Figure 11.5 Standard milling-machine spindle nose...

There are many different types of milling cutters available, and for convenience they can be classified according to the method of mounting those with a central hole for mounting on an arbor, those with a screwed shank for holding in a special chuck and the large facing cutters which mount directly on to the spindle nose. 

Cooing/Heating Spirals Central Spindle Nose... 

Spindle Noses for Grinding Machines, Universal Machining Centers... 

Spindle Noses and Order No. J00053 Standards (Metric) Presses General... 

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