For Martin spading-closing wheels with two single row bearings, SH80172 Martin fCrusher wheel; John Deeere planter ME2, Plus, Pro; early XP, XP Pro; drill early 750 cast iron closing wheel.
Reduces bore of GD2031 bearing to .625". For heavy duty coulters and discs on Haybuster & Vermeer 77, 77C, 107, 107C, 147, 147C, 1575, 2575; Frontier BD1307 drills.