Description
When your disc harrow or ripper starts throwing dirt instead of cutting clean, worn spacer spools are often the culprit. This heavy-duty 7-inch disc spool maintains proper disc spacing and alignment on your John Deere tillage equipment, keeping your discs cutting evenly and your field work looking professional. It’s the kind of part that doesn’t get much attention until it fails—but you’ll sure notice the difference when you replace a worn one.
What You’re Getting
- Fabricated steel construction that handles the constant stress and vibration of disc work
- Precise 7-inch width designed specifically for 11-inch spacing units
- 1-3/4 inch square axle bore that fits your John Deere gang assemblies perfectly
- Direct replacement design—no modifications or special tools needed for installation
Built for Real Farm Work
This spool fits John Deere disc harrows including the 637, 640, and 650 models, plus the 510 and 512 disc rippers—machines that see some of the toughest conditions in agriculture. Whether you’re breaking up corn stubble in the fall, working down soybean residue, or preparing seedbeds in spring, these implements depend on proper disc spacing to do their job right. The 11-inch spacing is perfect for most tillage applications where you need good soil mixing without leaving big ridges.
Made to Last
Disc spools take a beating from rocks, roots, and the constant flexing that comes with working uneven ground. This fabricated spool is built from heavy-gauge steel that won’t crack or distort under field conditions. The square bore is machined to precise tolerances so it won’t work loose on the axle, and the overall construction is designed to handle years of seasonal use without wearing out.
Good to Know
Installation is straightforward—slide the old spool off the gang and replace with the new one. Check your disc blade spacing while you’re at it; worn spools often let blades shift position, which affects cutting performance. If you’re doing one spool, it’s worth checking the others on that gang since they typically wear at similar rates.
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