Yep Vinny. Its a HLV the predecessor to the HLVH. Has a narrower bed and the speed change is done with that crank on the left side of the stand. Got it on a government sale. Apparently had sat in a warehouse for decades, so long they didn't know where it had come from. Needed some work, the belts had deformed from sitting and the grease in it had turned to a varnish like substance. They're a joy to use. And for the moment its actually clean.
Just realized what you were asking, yes, Hardinge was apparently concerned that a gear drive off the headstock could set up harmonics so they isolated the drive with a variable speed DC motor for feeds. Two clutches engage the travel and cross feed. Threading is done with a leadscrew, through a dog clutch in the headstock. That small rod below the leadscrew is for the kick outs. You set the stops at either end of the thread you want to cut. Once you engage the half nuts they stay closed. When you get to the end of the thread the stop shifts the rod and disengages the dog clutch, but the spindle keeps turning, at that point there is a lever on the compound that you flip to retract the tool, flip the threading lever over and the carnage goes back to the other stop. Set your next cut return the tool and flip the direction lever to make the next pass. Incredible quick to thread with, Hardinge recommends not threading over 1000rpm though.
Just realized what you were asking, yes, Hardinge was apparently concerned that a gear drive off the headstock could set up harmonics so they isolated the drive with a variable speed DC motor for feeds. Two clutches engage the travel and cross feed. Threading is done with a leadscrew, through a dog clutch in the headstock. That small rod below the leadscrew is for the kick outs. You set the stops at either end of the thread you want to cut. Once you engage the half nuts they stay closed. When you get to the end of the thread the stop shifts the rod and disengages the dog clutch, but the spindle keeps turning, at that point there is a lever on the compound that you flip to retract the tool, flip the threading lever over and the carnage goes back to the other stop. Set your next cut return the tool and flip the direction lever to make the next pass. Incredible quick to thread with, Hardinge recommends not threading over 1000rpm though.
Free advice is worth exactly what you payed for it.
Greg
Greg