The LM317T can be used to generate a fixed voltage supply at continuous currents of up to 1.5 Amps. If the current required is in excess of 1 Amp, consider using the LM338T Voltage Regulator instead. The LM338T will cope with continuous currents of up to 5 Amps (and even more with a suitable heat sink *
Click here to purchase a TO220 Bolt-On Heatsink suitable for use with the LM317T. This will keep the temperature of the LM317T down when used to provide currents close to the rated value or when there is a large difference between the input voltage and the chosen output voltage.