TURBO-HEAD LX-1060
UVA air-driven grinding spindle
Operating manual

POWER OUTPUT

As load is applied, the rpm of the spindle will fall off from its no-load setting. The size of the drop will depend on the load. The relationship between the factors of load, output and grinding speed is shown in Fig. 5. There we see, for instance, that if the dial is set for 70,000 rpm and the speed drops to 63,000 rpm under load, the spindle will be developing .68 HP. Wheel loading can be continuously checked during grinding by observing the speed indicator, and feed adapted accordingly. Fig. 5 applies for an inlet pressure of 72 psi (5 kg/cm2). Avoid overloading! Keep the speed drop within normal bounds, i.e., max. 10-12 % of no-load speed, and you will obtain maximum bearing life.



AIR CONSUMPTION

This is shown in Fig. 6. The no-load consumption is shown by the broken line and the under-load consumption by the fully drawn lines. As an example, a no-load consumption of 9.1 cfm (260 1/min.) can be read off for 70,000 rpm, a consumption of 9.8 cfm (280 1/min.) for 75,000 rpm, and so on. Loading increases air consumption. If, for instance, the spindle is set for 70,000 rpm and the speed under load drops to 63,000 rpm the air consumption will rise from 9.1 cfm to 15.75 cfm (from 260 to 450 1/min.). When the load is removed the air consumption at once drops to its no-load value. All figures given are in free air per minute and apply for an inlet pressure of 72 psi (5 kg/cm2).



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