Our winter maintenance has been steadily progressing throughout this weird weather winter. Our greens, tees, and fairway reels have been ground, and I am in the process of doing our rough units as we speak. Pictured to the left is one of our greens mowing reels on the grinder. The grinder we have, a Neary 550, is a nice unit to work with. There is more manual adjustment and more operator involvement than some of the newer models, but once the nuances are figured out, grinding reels is not a chore.
The picture below is a close up of how the stone make light contact with the reelstock while it spins backwards. Every so often, the stone is moved closer to the reel, which leads to another thousandth of an inch removed from the stock. This process continues until each blade is sharp from end to end.

The larger units involve a second process called a relief grind. A relief grind is reelstock taken off the top at an angle, and reduces the braking effect that a blade encounters while cutting turf. The better the relief, the longer the blades stay sharp, in layman's terms. While I may get two or three greens or tee units sharp in a day, fairway and rough take about one day to fully complete.
Have a great day!