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. And there's no wear in the joint to affect depth. Either way, soil and residue are directed backward rather than up toward the disk gangs where they can interfere with the disking action. Accurate depth control. Single-point depth control is standard on folding WheatLand Disks, to let 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 WheatLand Disk. They smooth out soil and reduce outside ridges for an exceptionally smooth seedbed.