The power from electric motor is transmitted to drill spindle pulley through V-belt. There is provision of key way on drill spindle to slide the stepped V-pulley. When drill is required to feed into the work, it is pressed against the work by means of feed handle. As the handle is rotated, pinion rotates and rack moves longitudinally and hence the spindle and drill on the machine; drill rotates at very high speed to attain the required cutting speed. The complete driving mechanism is shown in Figure 19.29.
Figure 19.29 Driving Mechanism of a Drilling Machine
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