I have 3 drill presses also (will be selling 2 of them if I ever finish the resto's). one is a 14" South Bend, and they have a cammed lever to quick release the motor and swing it in to release tension on the belt for drive speed changes. pretty nifty idea. takes seconds to change speeds.
having said that, I will not be giving up my like new 1946 DP600 for the SB.
BTW, DP600 is not a model number. it is a casting number for the main casting of the 17" Delta drill presses of that era. we use it to refer to these models because it has become common place to do so. there were a lot of model numbers for these drill presses as they came with many options available. Rockwell also used this casting and casting number for a period of time when they absorbed Delta.
having said that, I will not be giving up my like new 1946 DP600 for the SB.
BTW, DP600 is not a model number. it is a casting number for the main casting of the 17" Delta drill presses of that era. we use it to refer to these models because it has become common place to do so. there were a lot of model numbers for these drill presses as they came with many options available. Rockwell also used this casting and casting number for a period of time when they absorbed Delta.