• Extra-large spindle bearings 6 PLUS 6 and -inchVS6-inch spindle and spindle pulley are supported by four over-sized, pre-loaded, lubricated-for-life ball bearings.
• Wide, test-proven speed range gives you a true 10-to-1 speed ratio. You get the exact speed you need for every drilling job on any material- 450-4,700 rpm with a 1,725 rpm motor.
• Quick belt tension release is provided by the pivoting motor mounting plate which has a reverse, self-locking taper on the spring-loaded, rubber-tipped plunger that quickly restores correct belt tension
• Extra-long quill travel gives the extra depth you need for deep-hole jobs like skip and gang drilling…PLUS, the extra stroke required for clearing jigs and fixtures
• Six speeds offer unbelievably wide range of speeds with a low-cost 1,725 rpm motor- 425; 600; 1,100; 2,050; 3,900 and 5,500 rpm- 11.8 to 1 speed ratio.

Amazon.com Product Description
The DELTA 15-344 Variable Speed Drill Press features a 3/4 HP three-phase 200-volt motor with a 24-volt push-button magnetic starter. It has a variable-speed drive allowing you to select a different spindle speed while the machine is running. The drill maintains proper belt tension automatically so you’ll always have full power transmission. A snubber feature holds speed settings constant no matter the load conditions. The quill is large with a two-inch diameter, and a long quill travel lets you do deep-hole jobs such as skip and gang drilling. The drill features extra-large spindle bearings “6 PLUS 6″ and “VS6″ spindle and spindle pulleys that are supported by lubricated-for-life ball bearings. The production table tilts 90 degrees in both directions and measures 15.5 x 21.5 inches (12 x 18 inches inside of coolant trough). Included is the table, motor and controls, belt and pulley guard, belt and motor pulley, self-locking depth stop, depth gauge, self-ejecting chuck key.

DELTA 15-344 15-Inch Variable Speed Drill Press w/Production Table Three Phase 200V w/Magnetic Starter