Unlike the joints in other disks that wear over time and distort depth by increasing play in the rockshaft, John Deere disks feature maintenance-free wheel modules. That means no time-consuming greasing of the joint ever. And there s no wear in the joint to affect depth. Accurate depth control. Single-point depth control, standard on folding RockDisks, lets you easily and precisely set depth from one point at the front of the disk.
Mechanical stops are standard on rigid models.
Double-action leveling adds stability. Double-action leveling also improves the disk s stability when you add rear attachments. Tapered blades smooth out soil. A one-blade taper and an integral furrow filler are standard on the 637 RockDisk. They smooth out soil and reduce outside ridges for an exceptionally smooth seedbed.